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3567 lines
137 KiB
EmacsLisp
3567 lines
137 KiB
EmacsLisp
;;; vc.el --- drive a version-control system from within Emacs
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;; Copyright (C) 1992,93,94,95,96,97,98,2000,2001 Free Software Foundation, Inc.
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;; Author: FSF (see below for full credits)
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;; Maintainer: Andre Spiegel <spiegel@gnu.org>
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;; Keywords: tools
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;; $Id: vc.el,v 1.349 2003/02/05 23:13:21 lektu Exp $
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Credits:
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;; VC was initially designed and implemented by Eric S. Raymond
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;; <esr@snark.thyrsus.com>. Over the years, many people have
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;; contributed substantial amounts of work to VC. These include:
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;; Per Cederqvist <ceder@lysator.liu.se>
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;; Paul Eggert <eggert@twinsun.com>
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;; Sebastian Kremer <sk@thp.uni-koeln.de>
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;; Martin Lorentzson <martinl@gnu.org>
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;; Dave Love <fx@gnu.org>
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;; Stefan Monnier <monnier@cs.yale.edu>
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;; J.D. Smith <jdsmith@alum.mit.edu>
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;; Andre Spiegel <spiegel@gnu.org>
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;; Richard Stallman <rms@gnu.org>
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;; Thien-Thi Nguyen <ttn@gnu.org>
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;;; Commentary:
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;; This mode is fully documented in the Emacs user's manual.
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;;
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;; Supported version-control systems presently include SCCS, RCS, and CVS.
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;;
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;; Some features will not work with old RCS versions. Where
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;; appropriate, VC finds out which version you have, and allows or
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;; disallows those features (stealing locks, for example, works only
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;; from 5.6.2 onwards).
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;; Even initial checkins will fail if your RCS version is so old that ci
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;; doesn't understand -t-; this has been known to happen to people running
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;; NExTSTEP 3.0.
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;;
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;; You can support the RCS -x option by customizing vc-rcs-master-templates.
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;;
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;; Proper function of the SCCS diff commands requires the shellscript vcdiff
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;; to be installed somewhere on Emacs's path for executables.
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;;
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;; If your site uses the ChangeLog convention supported by Emacs, the
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;; function vc-comment-to-change-log should prove a useful checkin hook.
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;;
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;; The vc code maintains some internal state in order to reduce expensive
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;; version-control operations to a minimum. Some names are only computed
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;; once. If you perform version control operations with RCS/SCCS/CVS while
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;; vc's back is turned, or move/rename master files while vc is running,
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;; vc may get seriously confused. Don't do these things!
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;;
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;; Developer's notes on some concurrency issues are included at the end of
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;; the file.
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;;
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;; ADDING SUPPORT FOR OTHER BACKENDS
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;;
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;; VC can use arbitrary version control systems as a backend. To add
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;; support for a new backend named SYS, write a library vc-sys.el that
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;; contains functions of the form `vc-sys-...' (note that SYS is in lower
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;; case for the function and library names). VC will use that library if
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;; you put the symbol SYS somewhere into the list of
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;; `vc-handled-backends'. Then, for example, if `vc-sys-registered'
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;; returns non-nil for a file, all SYS-specific versions of VC commands
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;; will be available for that file.
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;;
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;; VC keeps some per-file information in the form of properties (see
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;; vc-file-set/getprop in vc-hooks.el). The backend-specific functions
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;; do not generally need to be aware of these properties. For example,
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;; `vc-sys-workfile-version' should compute the workfile version and
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;; return it; it should not look it up in the property, and it needn't
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;; store it there either. However, if a backend-specific function does
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;; store a value in a property, that value takes precedence over any
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;; value that the generic code might want to set (check for uses of
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;; the macro `with-vc-properties' in vc.el).
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;;
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;; In the list of functions below, each identifier needs to be prepended
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;; with `vc-sys-'. Some of the functions are mandatory (marked with a
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;; `*'), others are optional (`-').
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;;
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;; STATE-QUERYING FUNCTIONS
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;;
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;; * registered (file)
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;;
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;; Return non-nil if FILE is registered in this backend.
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;;
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;; * state (file)
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;;
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;; Return the current version control state of FILE. For a list of
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;; possible values, see `vc-state'. This function should do a full and
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;; reliable state computation; it is usually called immediately after
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;; C-x v v. If you want to use a faster heuristic when visiting a
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;; file, put that into `state-heuristic' below.
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;;
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;; - state-heuristic (file)
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;;
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;; If provided, this function is used to estimate the version control
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;; state of FILE at visiting time. It should be considerably faster
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;; than the implementation of `state'. For a list of possible values,
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;; see the doc string of `vc-state'.
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;;
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;; - dir-state (dir)
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;;
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;; If provided, this function is used to find the version control state
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;; of all files in DIR in a fast way. The function should not return
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;; anything, but rather store the files' states into the corresponding
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;; `vc-state' properties.
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;;
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;; * workfile-version (file)
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;;
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;; Return the current workfile version of FILE.
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;;
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;; - latest-on-branch-p (file)
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;;
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;; Return non-nil if the current workfile version of FILE is the latest
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;; on its branch. The default implementation always returns t, which
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;; means that working with non-current versions is not supported by
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;; default.
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;;
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;; * checkout-model (file)
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;;
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;; Indicate whether FILE needs to be "checked out" before it can be
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;; edited. See `vc-checkout-model' for a list of possible values.
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;;
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;; - workfile-unchanged-p (file)
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;;
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;; Return non-nil if FILE is unchanged from its current workfile
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;; version. This function should do a brief comparison of FILE's
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;; contents with those of the master version. If the backend does not
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;; have such a brief-comparison feature, the default implementation of
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;; this function can be used, which delegates to a full
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;; vc-BACKEND-diff. (Note that vc-BACKEND-diff must not run
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;; asynchronously in this case.)
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;;
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;; - mode-line-string (file)
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;;
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;; If provided, this function should return the VC-specific mode line
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;; string for FILE. The default implementation deals well with all
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;; states that `vc-state' can return.
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;;
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;; - dired-state-info (file)
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;;
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;; Translate the `vc-state' property of FILE into a string that can be
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;; used in a vc-dired buffer. The default implementation deals well
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;; with all states that `vc-state' can return.
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;;
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;; STATE-CHANGING FUNCTIONS
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;;
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;; * register (file &optional rev comment)
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;;
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;; Register FILE in this backend. Optionally, an initial revision REV
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;; and an initial description of the file, COMMENT, may be specified.
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;; The implementation should pass the value of vc-register-switches
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;; to the backend command.
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;;
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;; - init-version (file)
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;;
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;; The initial version to use when registering FILE if one is not
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;; specified by the user. If not provided, the variable
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;; vc-default-init-version is used instead.
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;;
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;; - responsible-p (file)
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;;
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;; Return non-nil if this backend considers itself "responsible" for
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;; FILE, which can also be a directory. This function is used to find
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;; out what backend to use for registration of new files and for things
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;; like change log generation. The default implementation always
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;; returns nil.
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;;
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;; - could-register (file)
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;;
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;; Return non-nil if FILE could be registered under this backend. The
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;; default implementation always returns t.
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;;
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;; - receive-file (file rev)
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;;
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;; Let this backend "receive" a file that is already registered under
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;; another backend. The default implementation simply calls `register'
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;; for FILE, but it can be overridden to do something more specific,
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;; e.g. keep revision numbers consistent or choose editing modes for
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;; FILE that resemble those of the other backend.
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;;
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;; - unregister (file)
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;;
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;; Unregister FILE from this backend. This is only needed if this
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;; backend may be used as a "more local" backend for temporary editing.
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;;
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;; * checkin (file rev comment)
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;;
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;; Commit changes in FILE to this backend. If REV is non-nil, that
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;; should become the new revision number. COMMENT is used as a
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;; check-in comment. The implementation should pass the value of
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;; vc-checkin-switches to the backend command.
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;;
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;; * find-version (file rev buffer)
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;;
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;; Fetch revision REV of file FILE and put it into BUFFER.
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;; If REV is the empty string, fetch the head of the trunk.
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;; The implementation should pass the value of vc-checkout-switches
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;; to the backend command.
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;;
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;; * checkout (file &optional editable rev)
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;;
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;; Check out revision REV of FILE into the working area. If EDITABLE
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;; is non-nil, FILE should be writable by the user and if locking is
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;; used for FILE, a lock should also be set. If REV is non-nil, that
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;; is the revision to check out (default is current workfile version).
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;; If REV is t, that means to check out the head of the current branch;
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;; if it is the empty string, check out the head of the trunk.
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;; The implementation should pass the value of vc-checkout-switches
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;; to the backend command.
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;;
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;; * revert (file &optional contents-done)
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;;
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;; Revert FILE back to the current workfile version. If optional
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;; arg CONTENTS-DONE is non-nil, then the contents of FILE have
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;; already been reverted from a version backup, and this function
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;; only needs to update the status of FILE within the backend.
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;;
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;; - cancel-version (file editable)
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;;
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;; Cancel the current workfile version of FILE, i.e. remove it from the
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;; master. EDITABLE non-nil means that FILE should be writable
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;; afterwards, and if locking is used for FILE, then a lock should also
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;; be set. If this function is not provided, trying to cancel a
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;; version is caught as an error.
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;;
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;; - merge (file rev1 rev2)
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;;
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;; Merge the changes between REV1 and REV2 into the current working file.
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;;
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;; - merge-news (file)
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;;
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;; Merge recent changes from the current branch into FILE.
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;;
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;; - steal-lock (file &optional version)
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;;
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;; Steal any lock on the current workfile version of FILE, or on
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;; VERSION if that is provided. This function is only needed if
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;; locking is used for files under this backend, and if files can
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;; indeed be locked by other users.
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;;
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;; HISTORY FUNCTIONS
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;;
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;; * print-log (file)
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;;
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;; Insert the revision log of FILE into the *vc* buffer.
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;;
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;; - show-log-entry (version)
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;;
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;; If provided, search the log entry for VERSION in the current buffer,
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;; and make sure it is displayed in the buffer's window. The default
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;; implementation of this function works for RCS-style logs.
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;;
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;; - wash-log (file)
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;;
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;; Remove all non-comment information from the output of print-log. The
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;; default implementation of this function works for RCS-style logs.
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;;
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;; - logentry-check ()
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;;
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;; If defined, this function is run to find out whether the user
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;; entered a valid log entry for check-in. The log entry is in the
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;; current buffer, and if it is not a valid one, the function should
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;; throw an error.
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;;
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;; - comment-history (file)
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;;
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;; Return a string containing all log entries that were made for FILE.
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;; This is used for transferring a file from one backend to another,
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;; retaining comment information. The default implementation of this
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;; function does this by calling print-log and then wash-log, and
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;; returning the resulting buffer contents as a string.
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;;
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;; - update-changelog (files)
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;;
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;; Using recent log entries, create ChangeLog entries for FILES, or for
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;; all files at or below the default-directory if FILES is nil. The
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;; default implementation runs rcs2log, which handles RCS- and
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;; CVS-style logs.
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;;
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;; * diff (file &optional rev1 rev2)
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;;
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;; Insert the diff for FILE into the *vc-diff* buffer. If REV1 and
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;; REV2 are non-nil, report differences from REV1 to REV2. If REV1
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;; is nil, use the current workfile version (as found in the
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;; repository) as the older version; if REV2 is nil, use the current
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;; workfile contents as the newer version. This function should
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;; pass the value of (vc-diff-switches-list BACKEND) to the backend
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;; command. It should return a status of either 0 (no differences
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;; found), or 1 (either non-empty diff or the diff is run
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;; asynchronously).
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;;
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;; - diff-tree (dir &optional rev1 rev2)
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;;
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;; Insert the diff for all files at and below DIR into the *vc-diff*
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;; buffer. The meaning of REV1 and REV2 is the same as for
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;; vc-BACKEND-diff. The default implementation does an explicit tree
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;; walk, calling vc-BACKEND-diff for each individual file.
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;;
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;; - annotate-command (file buf rev)
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;;
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;; If this function is provided, it should produce an annotated version
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;; of FILE in BUF, relative to version REV. This is currently only
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;; implemented for CVS, using the `cvs annotate' command.
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;;
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;; - annotate-time ()
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;;
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;; Only required if `annotate-command' is defined for the backend.
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;; Return the time of the next line of annotation at or after point,
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;; as a floating point fractional number of days. The helper
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;; function `vc-annotate-convert-time' may be useful for converting
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;; multi-part times as returned by `current-time' and `encode-time'
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;; to this format. Return nil if no more lines of annotation appear
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;; in the buffer. You can safely assume that point is placed at the
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;; beginning of each line, starting at `point-min'. The buffer that
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;; point is placed in is the Annotate output, as defined by the
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;; relevant backend.
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;;
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;; - annotate-current-time ()
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;;
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;; Only required if `annotate-command' is defined for the backend,
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;; AND you'd like the current time considered to be anything besides
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;; (vs-annotate-convert-time (current-time)) -- i.e. the current
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;; time with hours, minutes, and seconds included. Probably safe to
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;; ignore. Return the current-time, in units of fractional days.
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;;
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;; SNAPSHOT SYSTEM
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;;
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;; - create-snapshot (dir name branchp)
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;;
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;; Take a snapshot of the current state of files under DIR and name it
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;; NAME. This should make sure that files are up-to-date before
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;; proceeding with the action. DIR can also be a file and if BRANCHP
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;; is specified, NAME should be created as a branch and DIR should be
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;; checked out under this new branch. The default implementation does
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;; not support branches but does a sanity check, a tree traversal and
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;; for each file calls `assign-name'.
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;;
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;; - assign-name (file name)
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;;
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;; Give name NAME to the current version of FILE, assuming it is
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;; up-to-date. Only used by the default version of `create-snapshot'.
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;;
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;; - retrieve-snapshot (dir name update)
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;;
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;; Retrieve a named snapshot of all registered files at or below DIR.
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;; If UPDATE is non-nil, then update buffers of any files in the
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;; snapshot that are currently visited. The default implementation
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;; does a sanity check whether there aren't any uncommitted changes at
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;; or below DIR, and then performs a tree walk, using the `checkout'
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;; function to retrieve the corresponding versions.
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;;
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;; MISCELLANEOUS
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;;
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;; - make-version-backups-p (file)
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;;
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;; Return non-nil if unmodified repository versions of FILE should be
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;; backed up locally. If this is done, VC can perform `diff' and
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;; `revert' operations itself, without calling the backend system. The
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;; default implementation always returns nil.
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;;
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;; - previous-version (file rev)
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;;
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;; Return the version number that precedes REV for FILE.
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;;
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;; - check-headers ()
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;;
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;; Return non-nil if the current buffer contains any version headers.
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;;
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;; - clear-headers ()
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;;
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;; In the current buffer, reset all version headers to their unexpanded
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;; form. This function should be provided if the state-querying code
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;; for this backend uses the version headers to determine the state of
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;; a file. This function will then be called whenever VC changes the
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;; version control state in such a way that the headers would give
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;; wrong information.
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;;
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;; - rename-file (old new)
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;;
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;; Rename file OLD to NEW, both in the working area and in the
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;; repository. If this function is not provided, the command
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;; `vc-rename-file' will signal an error.
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;;; Code:
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(require 'vc-hooks)
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(require 'ring)
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(eval-when-compile
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(require 'cl)
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(require 'compile)
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(require 'dired) ; for dired-map-over-marks macro
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(require 'dired-aux)) ; for dired-kill-{line,tree}
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(if (not (assoc 'vc-parent-buffer minor-mode-alist))
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(setq minor-mode-alist
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(cons '(vc-parent-buffer vc-parent-buffer-name)
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minor-mode-alist)))
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|
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;; General customization
|
||
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(defgroup vc nil
|
||
"Version-control system in Emacs."
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:group 'tools)
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(defcustom vc-suppress-confirm nil
|
||
"*If non-nil, treat user as expert; suppress yes-no prompts on some things."
|
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:type 'boolean
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:group 'vc)
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|
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(defcustom vc-delete-logbuf-window t
|
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"*If non-nil, delete the *VC-log* buffer and window after each logical action.
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If nil, bury that buffer instead.
|
||
This is most useful if you have multiple windows on a frame and would like to
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preserve the setting."
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:type 'boolean
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:group 'vc)
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|
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(defcustom vc-initial-comment nil
|
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"*If non-nil, prompt for initial comment when a file is registered."
|
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:type 'boolean
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:group 'vc)
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|
||
(defcustom vc-default-init-version "1.1"
|
||
"*A string used as the default version number when a new file is registered.
|
||
This can be overridden by giving a prefix argument to \\[vc-register]. This
|
||
can also be overridden by a particular VC backend."
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||
:type 'string
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:group 'vc
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:version "20.3")
|
||
|
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(defcustom vc-command-messages nil
|
||
"*If non-nil, display run messages from back-end commands."
|
||
:type 'boolean
|
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:group 'vc)
|
||
|
||
(defcustom vc-checkin-switches nil
|
||
"*A string or list of strings specifying extra switches for checkin.
|
||
These are passed to the checkin program by \\[vc-checkin]."
|
||
:type '(choice (const :tag "None" nil)
|
||
(string :tag "Argument String")
|
||
(repeat :tag "Argument List"
|
||
:value ("")
|
||
string))
|
||
:group 'vc)
|
||
|
||
(defcustom vc-checkout-switches nil
|
||
"*A string or list of strings specifying extra switches for checkout.
|
||
These are passed to the checkout program by \\[vc-checkout]."
|
||
:type '(choice (const :tag "None" nil)
|
||
(string :tag "Argument String")
|
||
(repeat :tag "Argument List"
|
||
:value ("")
|
||
string))
|
||
:group 'vc)
|
||
|
||
(defcustom vc-register-switches nil
|
||
"*A string or list of strings; extra switches for registering a file.
|
||
These are passed to the checkin program by \\[vc-register]."
|
||
:type '(choice (const :tag "None" nil)
|
||
(string :tag "Argument String")
|
||
(repeat :tag "Argument List"
|
||
:value ("")
|
||
string))
|
||
:group 'vc)
|
||
|
||
(defcustom vc-dired-listing-switches "-al"
|
||
"*Switches passed to `ls' for vc-dired. MUST contain the `l' option."
|
||
:type 'string
|
||
:group 'vc
|
||
:version "21.1")
|
||
|
||
(defcustom vc-dired-recurse t
|
||
"*If non-nil, show directory trees recursively in VC Dired."
|
||
:type 'boolean
|
||
:group 'vc
|
||
:version "20.3")
|
||
|
||
(defcustom vc-dired-terse-display t
|
||
"*If non-nil, show only locked files in VC Dired."
|
||
:type 'boolean
|
||
:group 'vc
|
||
:version "20.3")
|
||
|
||
(defcustom vc-directory-exclusion-list '("SCCS" "RCS" "CVS")
|
||
"*List of directory names to be ignored when walking directory trees."
|
||
:type '(repeat string)
|
||
:group 'vc)
|
||
|
||
(defconst vc-maximum-comment-ring-size 32
|
||
"Maximum number of saved comments in the comment ring.")
|
||
|
||
(defcustom vc-diff-switches nil
|
||
"*A string or list of strings specifying switches for diff under VC.
|
||
When running diff under a given BACKEND, VC concatenates the values of
|
||
`diff-switches', `vc-diff-switches', and `vc-BACKEND-diff-switches' to
|
||
get the switches for that command. Thus, `vc-diff-switches' should
|
||
contain switches that are specific to version control, but not
|
||
specific to any particular backend."
|
||
:type '(choice (const :tag "None" nil)
|
||
(string :tag "Argument String")
|
||
(repeat :tag "Argument List"
|
||
:value ("")
|
||
string))
|
||
:group 'vc
|
||
:version "21.1")
|
||
|
||
;;;###autoload
|
||
(defcustom vc-checkout-hook nil
|
||
"*Normal hook (list of functions) run after checking out a file.
|
||
See `run-hooks'."
|
||
:type 'hook
|
||
:group 'vc
|
||
:version "21.1")
|
||
|
||
(defcustom vc-annotate-display-mode nil
|
||
"Which mode to color the output of \\[vc-annotate] with by default."
|
||
:type '(choice (const :tag "Default" nil)
|
||
(const :tag "Scale to Oldest" scale)
|
||
(const :tag "Scale Oldest->Newest" fullscale)
|
||
(number :tag "Specify Fractional Number of Days"
|
||
:value "20.5"))
|
||
:group 'vc)
|
||
|
||
;;;###autoload
|
||
(defcustom vc-checkin-hook nil
|
||
"*Normal hook (list of functions) run after a checkin is done.
|
||
See `run-hooks'."
|
||
:type 'hook
|
||
:options '(vc-comment-to-change-log)
|
||
:group 'vc)
|
||
|
||
;;;###autoload
|
||
(defcustom vc-before-checkin-hook nil
|
||
"*Normal hook (list of functions) run before a file is checked in.
|
||
See `run-hooks'."
|
||
:type 'hook
|
||
:group 'vc)
|
||
|
||
(defcustom vc-logentry-check-hook nil
|
||
"*Normal hook run by `vc-backend-logentry-check'.
|
||
Use this to impose your own rules on the entry in addition to any the
|
||
version control backend imposes itself."
|
||
:type 'hook
|
||
:group 'vc)
|
||
|
||
;; Annotate customization
|
||
(defcustom vc-annotate-color-map
|
||
'(( 20. . "#FF0000")
|
||
( 40. . "#FF3800")
|
||
( 60. . "#FF7000")
|
||
( 80. . "#FFA800")
|
||
(100. . "#FFE000")
|
||
(120. . "#E7FF00")
|
||
(140. . "#AFFF00")
|
||
(160. . "#77FF00")
|
||
(180. . "#3FFF00")
|
||
(200. . "#07FF00")
|
||
(220. . "#00FF31")
|
||
(240. . "#00FF69")
|
||
(260. . "#00FFA1")
|
||
(280. . "#00FFD9")
|
||
(300. . "#00EEFF")
|
||
(320. . "#00B6FF")
|
||
(340. . "#007EFF"))
|
||
"*Association list of age versus color, for \\[vc-annotate].
|
||
Ages are given in units of fractional days. Default is eighteen steps
|
||
using a twenty day increment."
|
||
:type 'alist
|
||
:group 'vc)
|
||
|
||
(defcustom vc-annotate-very-old-color "#0046FF"
|
||
"*Color for lines older than the current color range in \\[vc-annotate]]."
|
||
:type 'string
|
||
:group 'vc)
|
||
|
||
(defcustom vc-annotate-background "black"
|
||
"*Background color for \\[vc-annotate].
|
||
Default color is used if nil."
|
||
:type 'string
|
||
:group 'vc)
|
||
|
||
(defcustom vc-annotate-menu-elements '(2 0.5 0.1 0.01)
|
||
"*Menu elements for the mode-specific menu of VC-Annotate mode.
|
||
List of factors, used to expand/compress the time scale. See `vc-annotate'."
|
||
:type '(repeat number)
|
||
:group 'vc)
|
||
|
||
;; vc-annotate functionality (CVS only).
|
||
(defvar vc-annotate-mode nil
|
||
"Variable indicating if VC-Annotate mode is active.")
|
||
|
||
(defvar vc-annotate-mode-map
|
||
(let ((m (make-sparse-keymap)))
|
||
(define-key m [menu-bar] (make-sparse-keymap "VC-Annotate"))
|
||
m)
|
||
"Local keymap used for VC-Annotate mode.")
|
||
|
||
(defvar vc-annotate-mode-menu nil
|
||
"Local keymap used for VC-Annotate mode's menu bar menu.")
|
||
|
||
;; Header-insertion hair
|
||
|
||
(defcustom vc-static-header-alist
|
||
'(("\\.c$" .
|
||
"\n#ifndef lint\nstatic char vcid[] = \"\%s\";\n#endif /* lint */\n"))
|
||
"*Associate static header string templates with file types.
|
||
A \%s in the template is replaced with the first string associated with
|
||
the file's version control type in `vc-header-alist'."
|
||
:type '(repeat (cons :format "%v"
|
||
(regexp :tag "File Type")
|
||
(string :tag "Header String")))
|
||
:group 'vc)
|
||
|
||
(defcustom vc-comment-alist
|
||
'((nroff-mode ".\\\"" ""))
|
||
"*Special comment delimiters for generating VC headers.
|
||
Add an entry in this list if you need to override the normal `comment-start'
|
||
and `comment-end' variables. This will only be necessary if the mode language
|
||
is sensitive to blank lines."
|
||
:type '(repeat (list :format "%v"
|
||
(symbol :tag "Mode")
|
||
(string :tag "Comment Start")
|
||
(string :tag "Comment End")))
|
||
:group 'vc)
|
||
|
||
(defcustom vc-checkout-carefully (= (user-uid) 0)
|
||
"*Non-nil means be extra-careful in checkout.
|
||
Verify that the file really is not locked
|
||
and that its contents match what the master file says."
|
||
:type 'boolean
|
||
:group 'vc)
|
||
(make-obsolete-variable 'vc-checkout-carefully
|
||
"the corresponding checks are always done now."
|
||
"21.1")
|
||
|
||
|
||
;; The main keymap
|
||
|
||
;; Initialization code, to be done just once at load-time
|
||
(defvar vc-log-mode-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(set-keymap-parent map text-mode-map)
|
||
(define-key map "\M-n" 'vc-next-comment)
|
||
(define-key map "\M-p" 'vc-previous-comment)
|
||
(define-key map "\M-r" 'vc-comment-search-reverse)
|
||
(define-key map "\M-s" 'vc-comment-search-forward)
|
||
(define-key map "\C-c\C-c" 'vc-finish-logentry)
|
||
map))
|
||
;; Compatibility with old name. Should we bother ?
|
||
(defvar vc-log-entry-mode vc-log-mode-map)
|
||
|
||
|
||
;; Variables the user doesn't need to know about.
|
||
(defvar vc-log-operation nil)
|
||
(defvar vc-log-after-operation-hook nil)
|
||
(defvar vc-annotate-buffers nil
|
||
"Alist of current \"Annotate\" buffers and their corresponding backends.
|
||
The keys are \(BUFFER . BACKEND\). See also `vc-annotate-get-backend'.")
|
||
;; In a log entry buffer, this is a local variable
|
||
;; that points to the buffer for which it was made
|
||
;; (either a file, or a VC dired buffer).
|
||
(defvar vc-parent-buffer nil)
|
||
(put 'vc-parent-buffer 'permanent-local t)
|
||
(defvar vc-parent-buffer-name nil)
|
||
(put 'vc-parent-buffer-name 'permanent-local t)
|
||
|
||
(defvar vc-log-file)
|
||
(defvar vc-log-version)
|
||
|
||
(defvar vc-dired-mode nil)
|
||
(make-variable-buffer-local 'vc-dired-mode)
|
||
|
||
(defvar vc-comment-ring (make-ring vc-maximum-comment-ring-size))
|
||
(defvar vc-comment-ring-index nil)
|
||
(defvar vc-last-comment-match "")
|
||
|
||
;; functions that operate on RCS revision numbers. This code should
|
||
;; also be moved into the backends. It stays for now, however, since
|
||
;; it is used in code below.
|
||
(defun vc-trunk-p (rev)
|
||
"Return t if REV is a revision on the trunk."
|
||
(not (eq nil (string-match "\\`[0-9]+\\.[0-9]+\\'" rev))))
|
||
|
||
(defun vc-branch-p (rev)
|
||
"Return t if REV is a branch revision."
|
||
(not (eq nil (string-match "\\`[0-9]+\\(\\.[0-9]+\\.[0-9]+\\)*\\'" rev))))
|
||
|
||
;;;###autoload
|
||
(defun vc-branch-part (rev)
|
||
"Return the branch part of a revision number REV."
|
||
(let ((index (string-match "\\.[0-9]+\\'" rev)))
|
||
(if index
|
||
(substring rev 0 index))))
|
||
|
||
(defun vc-minor-part (rev)
|
||
"Return the minor version number of a revision number REV."
|
||
(string-match "[0-9]+\\'" rev)
|
||
(substring rev (match-beginning 0) (match-end 0)))
|
||
|
||
(defun vc-default-previous-version (backend file rev)
|
||
"Guess the version number immediately preceding REV for FILE.
|
||
This default implementation works for <major>.<minor>-style version numbers
|
||
as used by RCS and CVS."
|
||
(let ((branch (vc-branch-part rev))
|
||
(minor-num (string-to-number (vc-minor-part rev))))
|
||
(when branch
|
||
(if (> minor-num 1)
|
||
;; version does probably not start a branch or release
|
||
(concat branch "." (number-to-string (1- minor-num)))
|
||
(if (vc-trunk-p rev)
|
||
;; we are at the beginning of the trunk --
|
||
;; don't know anything to return here
|
||
nil
|
||
;; we are at the beginning of a branch --
|
||
;; return version of starting point
|
||
(vc-branch-part branch))))))
|
||
|
||
;; File property caching
|
||
|
||
(defun vc-clear-context ()
|
||
"Clear all cached file properties and the comment ring."
|
||
(interactive)
|
||
(fillarray vc-file-prop-obarray 0)
|
||
;; Note: there is potential for minor lossage here if there is an open
|
||
;; log buffer with a nonzero local value of vc-comment-ring-index.
|
||
(setq vc-comment-ring (make-ring vc-maximum-comment-ring-size)))
|
||
|
||
(defmacro with-vc-properties (file form settings)
|
||
"Execute FORM, then maybe set per-file properties for FILE.
|
||
SETTINGS is an association list of property/value pairs. After
|
||
executing FORM, set those properties from SETTINGS that have not yet
|
||
been updated to their corresponding values."
|
||
`(let ((vc-touched-properties (list t)))
|
||
,form
|
||
(mapcar (lambda (setting)
|
||
(let ((property (car setting)))
|
||
(unless (memq property vc-touched-properties)
|
||
(put (intern ,file vc-file-prop-obarray)
|
||
property (cdr setting)))))
|
||
,settings)))
|
||
|
||
;; Random helper functions
|
||
|
||
(defsubst vc-editable-p (file)
|
||
"Return non-nil if FILE can be edited."
|
||
(or (eq (vc-checkout-model file) 'implicit)
|
||
(memq (vc-state file) '(edited needs-merge))))
|
||
|
||
;; Two macros for elisp programming
|
||
;;;###autoload
|
||
(defmacro with-vc-file (file comment &rest body)
|
||
"Check out a writable copy of FILE if necessary, then execute BODY.
|
||
Check in FILE with COMMENT (a string) after BODY has been executed.
|
||
FILE is passed through `expand-file-name'; BODY executed within
|
||
`save-excursion'. If FILE is not under version control, or locked by
|
||
somebody else, signal error."
|
||
(let ((filevar (make-symbol "file")))
|
||
`(let ((,filevar (expand-file-name ,file)))
|
||
(or (vc-backend ,filevar)
|
||
(error (format "File not under version control: `%s'" file)))
|
||
(unless (vc-editable-p ,filevar)
|
||
(let ((state (vc-state ,filevar)))
|
||
(if (stringp state)
|
||
(error (format "`%s' is locking `%s'" state ,filevar))
|
||
(vc-checkout ,filevar t))))
|
||
(save-excursion
|
||
,@body)
|
||
(vc-checkin ,filevar nil ,comment))))
|
||
|
||
(put 'with-vc-file 'lisp-indent-function 2)
|
||
|
||
;;;###autoload
|
||
(defmacro edit-vc-file (file comment &rest body)
|
||
"Edit FILE under version control, executing body.
|
||
Checkin with COMMENT after executing BODY.
|
||
This macro uses `with-vc-file', passing args to it.
|
||
However, before executing BODY, find FILE, and after BODY, save buffer."
|
||
(let ((filevar (make-symbol "file")))
|
||
`(let ((,filevar (expand-file-name ,file)))
|
||
(with-vc-file
|
||
,filevar ,comment
|
||
(set-buffer (find-file-noselect ,filevar))
|
||
,@body
|
||
(save-buffer)))))
|
||
|
||
(put 'edit-vc-file 'lisp-indent-function 2)
|
||
|
||
(defun vc-ensure-vc-buffer ()
|
||
"Make sure that the current buffer visits a version-controlled file."
|
||
(if vc-dired-mode
|
||
(set-buffer (find-file-noselect (dired-get-filename)))
|
||
(while vc-parent-buffer
|
||
(pop-to-buffer vc-parent-buffer))
|
||
(if (not (buffer-file-name))
|
||
(error "Buffer %s is not associated with a file" (buffer-name))
|
||
(if (not (vc-backend (buffer-file-name)))
|
||
(error "File %s is not under version control" (buffer-file-name))))))
|
||
|
||
(defun vc-process-filter (p s)
|
||
"An alternative output filter for async process P.
|
||
The only difference with the default filter is to insert S after markers."
|
||
(with-current-buffer (process-buffer p)
|
||
(save-excursion
|
||
(let ((inhibit-read-only t))
|
||
(goto-char (process-mark p))
|
||
(insert s)
|
||
(set-marker (process-mark p) (point))))))
|
||
|
||
(defun vc-setup-buffer (&optional buf)
|
||
"Prepare BUF for executing a VC command and make it current.
|
||
BUF defaults to \"*vc*\", can be a string and will be created if necessary."
|
||
(unless buf (setq buf "*vc*"))
|
||
(let ((camefrom (current-buffer))
|
||
(olddir default-directory))
|
||
(set-buffer (get-buffer-create buf))
|
||
(kill-all-local-variables)
|
||
(set (make-local-variable 'vc-parent-buffer) camefrom)
|
||
(set (make-local-variable 'vc-parent-buffer-name)
|
||
(concat " from " (buffer-name camefrom)))
|
||
(setq default-directory olddir)
|
||
(let ((inhibit-read-only t))
|
||
(erase-buffer))))
|
||
|
||
(defun vc-exec-after (code)
|
||
"Eval CODE when the current buffer's process is done.
|
||
If the current buffer has no process, just evaluate CODE.
|
||
Else, add CODE to the process' sentinel."
|
||
(let ((proc (get-buffer-process (current-buffer))))
|
||
(cond
|
||
;; If there's no background process, just execute the code.
|
||
((null proc) (eval code))
|
||
;; If the background process has exited, reap it and try again
|
||
((eq (process-status proc) 'exit)
|
||
(delete-process proc)
|
||
(vc-exec-after code))
|
||
;; If a process is running, add CODE to the sentinel
|
||
((eq (process-status proc) 'run)
|
||
(let ((sentinel (process-sentinel proc)))
|
||
(set-process-sentinel proc
|
||
`(lambda (p s)
|
||
(with-current-buffer ',(current-buffer)
|
||
(goto-char (process-mark p))
|
||
,@(append (cdr (cdr (cdr ;strip off `with-current-buffer buf
|
||
; (goto-char...)'
|
||
(car (cdr (cdr ;strip off `lambda (p s)'
|
||
sentinel))))))
|
||
(list `(vc-exec-after ',code))))))))
|
||
(t (error "Unexpected process state"))))
|
||
nil)
|
||
|
||
(defvar vc-post-command-functions nil
|
||
"Hook run at the end of `vc-do-command'.
|
||
Each function is called inside the buffer in which the command was run
|
||
and is passed 3 arguments: the COMMAND, the FILE and the FLAGS.")
|
||
|
||
;;;###autoload
|
||
(defun vc-do-command (buffer okstatus command file &rest flags)
|
||
"Execute a VC command, notifying user and checking for errors.
|
||
Output from COMMAND goes to BUFFER, or *vc* if BUFFER is nil or the
|
||
current buffer if BUFFER is t. If the destination buffer is not
|
||
already current, set it up properly and erase it. The command is
|
||
considered successful if its exit status does not exceed OKSTATUS (if
|
||
OKSTATUS is nil, that means to ignore errors, if it is 'async, that
|
||
means not to wait for termination of the subprocess). FILE is the
|
||
name of the working file (may also be nil, to execute commands that
|
||
don't expect a file name). If an optional list of FLAGS is present,
|
||
that is inserted into the command line before the filename."
|
||
(and file (setq file (expand-file-name file)))
|
||
(if vc-command-messages
|
||
(message "Running %s on %s..." command file))
|
||
(save-current-buffer
|
||
(unless (or (eq buffer t)
|
||
(and (stringp buffer)
|
||
(string= (buffer-name) buffer))
|
||
(eq buffer (current-buffer)))
|
||
(vc-setup-buffer buffer))
|
||
(let ((squeezed nil)
|
||
(inhibit-read-only t)
|
||
(status 0))
|
||
(setq squeezed (delq nil (copy-sequence flags)))
|
||
(when file
|
||
;; FIXME: file-relative-name can return a bogus result because
|
||
;; it doesn't look at the actual file-system to see if symlinks
|
||
;; come into play.
|
||
(setq squeezed (append squeezed (list (file-relative-name file)))))
|
||
(let ((exec-path (append vc-path exec-path))
|
||
;; Add vc-path to PATH for the execution of this command.
|
||
(process-environment
|
||
(cons (concat "PATH=" (getenv "PATH")
|
||
path-separator
|
||
(mapconcat 'identity vc-path path-separator))
|
||
process-environment))
|
||
(w32-quote-process-args t))
|
||
(if (eq okstatus 'async)
|
||
(let ((proc (apply 'start-process command (current-buffer) command
|
||
squeezed)))
|
||
(unless (active-minibuffer-window)
|
||
(message "Running %s in the background..." command))
|
||
;;(set-process-sentinel proc (lambda (p msg) (delete-process p)))
|
||
(set-process-filter proc 'vc-process-filter)
|
||
(vc-exec-after
|
||
`(unless (active-minibuffer-window)
|
||
(message "Running %s in the background... done" ',command))))
|
||
(setq status (apply 'call-process command nil t nil squeezed))
|
||
(when (or (not (integerp status)) (and okstatus (< okstatus status)))
|
||
(pop-to-buffer (current-buffer))
|
||
(goto-char (point-min))
|
||
(shrink-window-if-larger-than-buffer)
|
||
(error "Running %s...FAILED (%s)" command
|
||
(if (integerp status) (format "status %d" status) status))))
|
||
(if vc-command-messages
|
||
(message "Running %s...OK" command)))
|
||
(vc-exec-after
|
||
`(run-hook-with-args 'vc-post-command-functions ',command ',file ',flags))
|
||
status)))
|
||
|
||
(defun vc-position-context (posn)
|
||
"Save a bit of the text around POSN in the current buffer.
|
||
Used to help us find the corresponding position again later
|
||
if markers are destroyed or corrupted."
|
||
;; A lot of this was shamelessly lifted from Sebastian Kremer's
|
||
;; rcs.el mode.
|
||
(list posn
|
||
(buffer-size)
|
||
(buffer-substring posn
|
||
(min (point-max) (+ posn 100)))))
|
||
|
||
(defun vc-find-position-by-context (context)
|
||
"Return the position of CONTEXT in the current buffer.
|
||
If CONTEXT cannot be found, return nil."
|
||
(let ((context-string (nth 2 context)))
|
||
(if (equal "" context-string)
|
||
(point-max)
|
||
(save-excursion
|
||
(let ((diff (- (nth 1 context) (buffer-size))))
|
||
(if (< diff 0) (setq diff (- diff)))
|
||
(goto-char (nth 0 context))
|
||
(if (or (search-forward context-string nil t)
|
||
;; Can't use search-backward since the match may continue
|
||
;; after point.
|
||
(progn (goto-char (- (point) diff (length context-string)))
|
||
;; goto-char doesn't signal an error at
|
||
;; beginning of buffer like backward-char would
|
||
(search-forward context-string nil t)))
|
||
;; to beginning of OSTRING
|
||
(- (point) (length context-string))))))))
|
||
|
||
(defun vc-context-matches-p (posn context)
|
||
"Return t if POSN matches CONTEXT, nil otherwise."
|
||
(let* ((context-string (nth 2 context))
|
||
(len (length context-string))
|
||
(end (+ posn len)))
|
||
(if (> end (1+ (buffer-size)))
|
||
nil
|
||
(string= context-string (buffer-substring posn end)))))
|
||
|
||
(defun vc-buffer-context ()
|
||
"Return a list (POINT-CONTEXT MARK-CONTEXT REPARSE).
|
||
Used by `vc-restore-buffer-context' to later restore the context."
|
||
(let ((point-context (vc-position-context (point)))
|
||
;; Use mark-marker to avoid confusion in transient-mark-mode.
|
||
(mark-context (if (eq (marker-buffer (mark-marker)) (current-buffer))
|
||
(vc-position-context (mark-marker))))
|
||
;; Make the right thing happen in transient-mark-mode.
|
||
(mark-active nil)
|
||
;; We may want to reparse the compilation buffer after revert
|
||
(reparse (and (boundp 'compilation-error-list) ;compile loaded
|
||
(let ((curbuf (current-buffer)))
|
||
;; Construct a list; each elt is nil or a buffer
|
||
;; iff that buffer is a compilation output buffer
|
||
;; that contains markers into the current buffer.
|
||
(save-excursion
|
||
(mapcar (lambda (buffer)
|
||
(set-buffer buffer)
|
||
(let ((errors (or
|
||
compilation-old-error-list
|
||
compilation-error-list))
|
||
(buffer-error-marked-p nil))
|
||
(while (and (consp errors)
|
||
(not buffer-error-marked-p))
|
||
(and (markerp (cdr (car errors)))
|
||
(eq buffer
|
||
(marker-buffer
|
||
(cdr (car errors))))
|
||
(setq buffer-error-marked-p t))
|
||
(setq errors (cdr errors)))
|
||
(if buffer-error-marked-p buffer)))
|
||
(buffer-list)))))))
|
||
(list point-context mark-context reparse)))
|
||
|
||
(defun vc-restore-buffer-context (context)
|
||
"Restore point/mark, and reparse any affected compilation buffers.
|
||
CONTEXT is that which `vc-buffer-context' returns."
|
||
(let ((point-context (nth 0 context))
|
||
(mark-context (nth 1 context))
|
||
(reparse (nth 2 context)))
|
||
;; Reparse affected compilation buffers.
|
||
(while reparse
|
||
(if (car reparse)
|
||
(with-current-buffer (car reparse)
|
||
(let ((compilation-last-buffer (current-buffer)) ;select buffer
|
||
;; Record the position in the compilation buffer of
|
||
;; the last error next-error went to.
|
||
(error-pos (marker-position
|
||
(car (car-safe compilation-error-list)))))
|
||
;; Reparse the error messages as far as they were parsed before.
|
||
(compile-reinitialize-errors '(4) compilation-parsing-end)
|
||
;; Move the pointer up to find the error we were at before
|
||
;; reparsing. Now next-error should properly go to the next one.
|
||
(while (and compilation-error-list
|
||
(/= error-pos (car (car compilation-error-list))))
|
||
(setq compilation-error-list (cdr compilation-error-list))))))
|
||
(setq reparse (cdr reparse)))
|
||
|
||
;; if necessary, restore point and mark
|
||
(if (not (vc-context-matches-p (point) point-context))
|
||
(let ((new-point (vc-find-position-by-context point-context)))
|
||
(if new-point (goto-char new-point))))
|
||
(and mark-active
|
||
mark-context
|
||
(not (vc-context-matches-p (mark) mark-context))
|
||
(let ((new-mark (vc-find-position-by-context mark-context)))
|
||
(if new-mark (set-mark new-mark))))))
|
||
|
||
(defun vc-revert-buffer1 (&optional arg no-confirm)
|
||
"Revert buffer, keeping point and mark where user expects them.
|
||
Try to be clever in the face of changes due to expanded version control
|
||
key words. This is important for typeahead to work as expected.
|
||
ARG and NO-CONFIRM are passed on to `revert-buffer'."
|
||
(interactive "P")
|
||
(widen)
|
||
(let ((context (vc-buffer-context)))
|
||
;; Use save-excursion here, because it may be able to restore point
|
||
;; and mark properly even in cases where vc-restore-buffer-context
|
||
;; would fail. However, save-excursion might also get it wrong --
|
||
;; in this case, vc-restore-buffer-context gives it a second try.
|
||
(save-excursion
|
||
;; t means don't call normal-mode;
|
||
;; that's to preserve various minor modes.
|
||
(revert-buffer arg no-confirm t))
|
||
(vc-restore-buffer-context context)))
|
||
|
||
|
||
(defun vc-buffer-sync (&optional not-urgent)
|
||
"Make sure the current buffer and its working file are in sync.
|
||
NOT-URGENT means it is ok to continue if the user says not to save."
|
||
(if (buffer-modified-p)
|
||
(if (or vc-suppress-confirm
|
||
(y-or-n-p (format "Buffer %s modified; save it? " (buffer-name))))
|
||
(save-buffer)
|
||
(unless not-urgent
|
||
(error "Aborted")))))
|
||
|
||
(defun vc-default-latest-on-branch-p (backend file)
|
||
"Return non-nil if FILE is the latest on its branch.
|
||
This default implementation always returns non-nil, which means that
|
||
editing non-current versions is not supported by default."
|
||
t)
|
||
|
||
(defun vc-recompute-state (file)
|
||
"Force a recomputation of the version control state of FILE.
|
||
The state is computed using the exact, and possibly expensive
|
||
function `vc-BACKEND-state', not the heuristic."
|
||
(vc-file-setprop file 'vc-state (vc-call state file)))
|
||
|
||
(defun vc-next-action-on-file (file verbose &optional comment)
|
||
"Do The Right Thing for a given FILE under version control.
|
||
If COMMENT is specified, it will be used as an admin or checkin comment.
|
||
If VERBOSE is non-nil, query the user rather than using default parameters."
|
||
(let ((visited (get-file-buffer file))
|
||
state version)
|
||
(when visited
|
||
(if vc-dired-mode
|
||
(switch-to-buffer-other-window visited)
|
||
(set-buffer visited))
|
||
;; Check relation of buffer and file, and make sure
|
||
;; user knows what he's doing. First, finding the file
|
||
;; will check whether the file on disk is newer.
|
||
;; Ignore buffer-read-only during this test, and
|
||
;; preserve find-file-literally.
|
||
(let ((buffer-read-only (not (file-writable-p file))))
|
||
(find-file-noselect file nil find-file-literally))
|
||
(if (not (verify-visited-file-modtime (current-buffer)))
|
||
(if (yes-or-no-p "Replace file on disk with buffer contents? ")
|
||
(write-file (buffer-file-name))
|
||
(error "Aborted"))
|
||
;; Now, check if we have unsaved changes.
|
||
(vc-buffer-sync t)
|
||
(if (buffer-modified-p)
|
||
(or (y-or-n-p "Operate on disk file, keeping modified buffer? ")
|
||
(error "Aborted")))))
|
||
|
||
;; Do the right thing
|
||
(if (not (vc-registered file))
|
||
(vc-register verbose comment)
|
||
(vc-recompute-state file)
|
||
(if visited (vc-mode-line file))
|
||
(setq state (vc-state file))
|
||
(cond
|
||
;; up-to-date
|
||
((or (eq state 'up-to-date)
|
||
(and verbose (eq state 'needs-patch)))
|
||
(cond
|
||
(verbose
|
||
;; go to a different version
|
||
(setq version
|
||
(read-string "Branch, version, or backend to move to: "))
|
||
(let ((vsym (intern-soft (upcase version))))
|
||
(if (member vsym vc-handled-backends)
|
||
(vc-transfer-file file vsym)
|
||
(vc-checkout file (eq (vc-checkout-model file) 'implicit)
|
||
version))))
|
||
((not (eq (vc-checkout-model file) 'implicit))
|
||
;; check the file out
|
||
(vc-checkout file t))
|
||
(t
|
||
;; do nothing
|
||
(message "%s is up-to-date" file))))
|
||
|
||
;; Abnormal: edited but read-only
|
||
((and visited (eq state 'edited)
|
||
buffer-read-only (not (file-writable-p file)))
|
||
;; Make the file+buffer read-write. If the user really wanted to
|
||
;; commit, he'll get a chance to do that next time around, anyway.
|
||
(message "File is edited but read-only; making it writable")
|
||
(set-file-modes buffer-file-name
|
||
(logior (file-modes buffer-file-name) 128))
|
||
(toggle-read-only -1))
|
||
|
||
;; edited
|
||
((eq state 'edited)
|
||
(cond
|
||
;; For files with locking, if the file does not contain
|
||
;; any changes, just let go of the lock, i.e. revert.
|
||
((and (not (eq (vc-checkout-model file) 'implicit))
|
||
(vc-workfile-unchanged-p file)
|
||
;; If buffer is modified, that means the user just
|
||
;; said no to saving it; in that case, don't revert,
|
||
;; because the user might intend to save after
|
||
;; finishing the log entry.
|
||
(not (and visited (buffer-modified-p))))
|
||
;; DO NOT revert the file without asking the user!
|
||
(if (not visited) (find-file-other-window file))
|
||
(if (yes-or-no-p "Revert to master version? ")
|
||
(vc-revert-buffer)))
|
||
(t ;; normal action
|
||
(if (not verbose)
|
||
(vc-checkin file nil comment)
|
||
(setq version (read-string "New version or backend: "))
|
||
(let ((vsym (intern (upcase version))))
|
||
(if (member vsym vc-handled-backends)
|
||
(vc-transfer-file file vsym)
|
||
(vc-checkin file version comment)))))))
|
||
|
||
;; locked by somebody else
|
||
((stringp state)
|
||
(if comment
|
||
(error "Sorry, you can't steal the lock on %s this way"
|
||
(file-name-nondirectory file)))
|
||
(vc-steal-lock file
|
||
(if verbose (read-string "Version to steal: ")
|
||
(vc-workfile-version file))
|
||
state))
|
||
|
||
;; needs-patch
|
||
((eq state 'needs-patch)
|
||
(if (yes-or-no-p (format
|
||
"%s is not up-to-date. Get latest version? "
|
||
(file-name-nondirectory file)))
|
||
(vc-checkout file (eq (vc-checkout-model file) 'implicit) t)
|
||
(if (and (not (eq (vc-checkout-model file) 'implicit))
|
||
(yes-or-no-p "Lock this version? "))
|
||
(vc-checkout file t)
|
||
(error "Aborted"))))
|
||
|
||
;; needs-merge
|
||
((eq state 'needs-merge)
|
||
(if (yes-or-no-p (format
|
||
"%s is not up-to-date. Merge in changes now? "
|
||
(file-name-nondirectory file)))
|
||
(vc-maybe-resolve-conflicts file (vc-call merge-news file))
|
||
(error "Aborted")))
|
||
|
||
;; unlocked-changes
|
||
((eq state 'unlocked-changes)
|
||
(if (not visited) (find-file-other-window file))
|
||
(if (save-window-excursion
|
||
(vc-version-diff file (vc-workfile-version file) nil)
|
||
(goto-char (point-min))
|
||
(let ((inhibit-read-only t))
|
||
(insert
|
||
(format "Changes to %s since last lock:\n\n" file)))
|
||
(not (beep))
|
||
(yes-or-no-p (concat "File has unlocked changes. "
|
||
"Claim lock retaining changes? ")))
|
||
(progn (vc-call steal-lock file)
|
||
(clear-visited-file-modtime)
|
||
;; Must clear any headers here because they wouldn't
|
||
;; show that the file is locked now.
|
||
(vc-clear-headers file)
|
||
(write-file (buffer-file-name))
|
||
(vc-mode-line file))
|
||
(if (not (yes-or-no-p
|
||
"Revert to checked-in version, instead? "))
|
||
(error "Checkout aborted")
|
||
(vc-revert-buffer1 t t)
|
||
(vc-checkout file t))))))))
|
||
|
||
(defvar vc-dired-window-configuration)
|
||
|
||
(defun vc-next-action-dired (file rev comment)
|
||
"Call `vc-next-action-on-file' on all the marked files.
|
||
Ignores FILE and REV, but passes on COMMENT."
|
||
(let ((dired-buffer (current-buffer))
|
||
(dired-dir default-directory))
|
||
(dired-map-over-marks
|
||
(let ((file (dired-get-filename)))
|
||
(message "Processing %s..." file)
|
||
(vc-next-action-on-file file nil comment)
|
||
(set-buffer dired-buffer)
|
||
(set-window-configuration vc-dired-window-configuration)
|
||
(message "Processing %s...done" file))
|
||
nil t))
|
||
(dired-move-to-filename))
|
||
|
||
;; Here's the major entry point.
|
||
|
||
;;;###autoload
|
||
(defun vc-next-action (verbose)
|
||
"Do the next logical version control operation on the current file.
|
||
|
||
If you call this from within a VC dired buffer with no files marked,
|
||
it will operate on the file in the current line.
|
||
|
||
If you call this from within a VC dired buffer, and one or more
|
||
files are marked, it will accept a log message and then operate on
|
||
each one. The log message will be used as a comment for any register
|
||
or checkin operations, but ignored when doing checkouts. Attempted
|
||
lock steals will raise an error.
|
||
|
||
A prefix argument lets you specify the version number to use.
|
||
|
||
For RCS and SCCS files:
|
||
If the file is not already registered, this registers it for version
|
||
control.
|
||
If the file is registered and not locked by anyone, this checks out
|
||
a writable and locked file ready for editing.
|
||
If the file is checked out and locked by the calling user, this
|
||
first checks to see if the file has changed since checkout. If not,
|
||
it performs a revert.
|
||
If the file has been changed, this pops up a buffer for entry
|
||
of a log message; when the message has been entered, it checks in the
|
||
resulting changes along with the log message as change commentary. If
|
||
the variable `vc-keep-workfiles' is non-nil (which is its default), a
|
||
read-only copy of the changed file is left in place afterwards.
|
||
If the file is registered and locked by someone else, you are given
|
||
the option to steal the lock.
|
||
|
||
For CVS files:
|
||
If the file is not already registered, this registers it for version
|
||
control. This does a \"cvs add\", but no \"cvs commit\".
|
||
If the file is added but not committed, it is committed.
|
||
If your working file is changed, but the repository file is
|
||
unchanged, this pops up a buffer for entry of a log message; when the
|
||
message has been entered, it checks in the resulting changes along
|
||
with the logmessage as change commentary. A writable file is retained.
|
||
If the repository file is changed, you are asked if you want to
|
||
merge in the changes into your working copy."
|
||
|
||
(interactive "P")
|
||
(catch 'nogo
|
||
(if vc-dired-mode
|
||
(let ((files (dired-get-marked-files)))
|
||
(set (make-local-variable 'vc-dired-window-configuration)
|
||
(current-window-configuration))
|
||
(if (string= ""
|
||
(mapconcat
|
||
(lambda (f)
|
||
(if (not (vc-up-to-date-p f)) "@" ""))
|
||
files ""))
|
||
(vc-next-action-dired nil nil "dummy")
|
||
(vc-start-entry nil nil nil nil
|
||
"Enter a change comment for the marked files."
|
||
'vc-next-action-dired))
|
||
(throw 'nogo nil)))
|
||
(while vc-parent-buffer
|
||
(pop-to-buffer vc-parent-buffer))
|
||
(if buffer-file-name
|
||
(vc-next-action-on-file buffer-file-name verbose)
|
||
(error "Buffer %s is not associated with a file" (buffer-name)))))
|
||
|
||
;; These functions help the vc-next-action entry point
|
||
|
||
;;;###autoload
|
||
(defun vc-register (&optional set-version comment)
|
||
"Register the current file into a version control system.
|
||
With prefix argument SET-VERSION, allow user to specify initial version
|
||
level. If COMMENT is present, use that as an initial comment.
|
||
|
||
The version control system to use is found by cycling through the list
|
||
`vc-handled-backends'. The first backend in that list which declares
|
||
itself responsible for the file (usually because other files in that
|
||
directory are already registered under that backend) will be used to
|
||
register the file. If no backend declares itself responsible, the
|
||
first backend that could register the file is used."
|
||
(interactive "P")
|
||
(unless buffer-file-name (error "No visited file"))
|
||
(when (vc-backend buffer-file-name)
|
||
(if (vc-registered buffer-file-name)
|
||
(error "This file is already registered")
|
||
(unless (y-or-n-p "Previous master file has vanished. Make a new one? ")
|
||
(error "Aborted"))))
|
||
;; Watch out for new buffers of size 0: the corresponding file
|
||
;; does not exist yet, even though buffer-modified-p is nil.
|
||
(if (and (not (buffer-modified-p))
|
||
(zerop (buffer-size))
|
||
(not (file-exists-p buffer-file-name)))
|
||
(set-buffer-modified-p t))
|
||
(vc-buffer-sync)
|
||
|
||
(vc-start-entry buffer-file-name
|
||
(if set-version
|
||
(read-string (format "Initial version level for %s: "
|
||
(buffer-name)))
|
||
(let ((backend (vc-responsible-backend buffer-file-name)))
|
||
(if (vc-find-backend-function backend 'init-version)
|
||
(vc-call-backend backend 'init-version)
|
||
vc-default-init-version)))
|
||
(or comment (not vc-initial-comment))
|
||
nil
|
||
"Enter initial comment."
|
||
(lambda (file rev comment)
|
||
(message "Registering %s... " file)
|
||
(let ((backend (vc-responsible-backend file t)))
|
||
(vc-file-clearprops file)
|
||
(vc-call-backend backend 'register file rev comment)
|
||
(vc-file-setprop file 'vc-backend backend)
|
||
(unless vc-make-backup-files
|
||
(make-local-variable 'backup-inhibited)
|
||
(setq backup-inhibited t)))
|
||
(message "Registering %s... done" file))))
|
||
|
||
|
||
(defun vc-responsible-backend (file &optional register)
|
||
"Return the name of a backend system that is responsible for FILE.
|
||
The optional argument REGISTER means that a backend suitable for
|
||
registration should be found.
|
||
|
||
If REGISTER is nil, then if FILE is already registered, return the
|
||
backend of FILE. If FILE is not registered, or a directory, then the
|
||
first backend in `vc-handled-backends' that declares itself
|
||
responsible for FILE is returned. If no backend declares itself
|
||
responsible, return the first backend.
|
||
|
||
If REGISTER is non-nil, return the first responsible backend under
|
||
which FILE is not yet registered. If there is no such backend, return
|
||
the first backend under which FILE is not yet registered, but could
|
||
be registered."
|
||
(if (not vc-handled-backends)
|
||
(error "No handled backends"))
|
||
(or (and (not (file-directory-p file)) (not register) (vc-backend file))
|
||
(catch 'found
|
||
;; First try: find a responsible backend. If this is for registration,
|
||
;; it must be a backend under which FILE is not yet registered.
|
||
(dolist (backend vc-handled-backends)
|
||
(and (or (not register)
|
||
(not (vc-call-backend backend 'registered file)))
|
||
(vc-call-backend backend 'responsible-p file)
|
||
(throw 'found backend)))
|
||
;; no responsible backend
|
||
(if (not register)
|
||
;; if this is not for registration, the first backend must do
|
||
(car vc-handled-backends)
|
||
;; for registration, we need to find a new backend that
|
||
;; could register FILE
|
||
(dolist (backend vc-handled-backends)
|
||
(and (not (vc-call-backend backend 'registered file))
|
||
(vc-call-backend backend 'could-register file)
|
||
(throw 'found backend)))
|
||
(error "No backend that could register")))))
|
||
|
||
(defun vc-default-responsible-p (backend file)
|
||
"Indicate whether BACKEND is reponsible for FILE.
|
||
The default is to return nil always."
|
||
nil)
|
||
|
||
(defun vc-default-could-register (backend file)
|
||
"Return non-nil if BACKEND could be used to register FILE.
|
||
The default implementation returns t for all files."
|
||
t)
|
||
|
||
(defun vc-resynch-window (file &optional keep noquery)
|
||
"If FILE is in the current buffer, either revert or unvisit it.
|
||
The choice between revert (to see expanded keywords) and unvisit depends on
|
||
`vc-keep-workfiles'. NOQUERY if non-nil inhibits confirmation for
|
||
reverting. NOQUERY should be t *only* if it is known the only
|
||
difference between the buffer and the file is due to version control
|
||
rather than user editing!"
|
||
(and (string= buffer-file-name file)
|
||
(if keep
|
||
(progn
|
||
(vc-revert-buffer1 t noquery)
|
||
;; TODO: Adjusting view mode might no longer be necessary
|
||
;; after RMS change to files.el of 1999-08-08. Investigate
|
||
;; this when we install the new VC.
|
||
(and view-read-only
|
||
(if (file-writable-p file)
|
||
(and view-mode
|
||
(let ((view-old-buffer-read-only nil))
|
||
(view-mode-exit)))
|
||
(and (not view-mode)
|
||
(not (eq (get major-mode 'mode-class) 'special))
|
||
(view-mode-enter))))
|
||
(vc-mode-line buffer-file-name))
|
||
(kill-buffer (current-buffer)))))
|
||
|
||
(defun vc-resynch-buffer (file &optional keep noquery)
|
||
"If FILE is currently visited, resynch its buffer."
|
||
(if (string= buffer-file-name file)
|
||
(vc-resynch-window file keep noquery)
|
||
(let ((buffer (get-file-buffer file)))
|
||
(if buffer
|
||
(with-current-buffer buffer
|
||
(vc-resynch-window file keep noquery)))))
|
||
(vc-dired-resynch-file file))
|
||
|
||
(defun vc-start-entry (file rev comment initial-contents msg action &optional after-hook)
|
||
"Accept a comment for an operation on FILE revision REV.
|
||
If COMMENT is nil, pop up a VC-log buffer, emit MSG, and set the
|
||
action on close to ACTION. If COMMENT is a string and
|
||
INITIAL-CONTENTS is non-nil, then COMMENT is used as the initial
|
||
contents of the log entry buffer. If COMMENT is a string and
|
||
INITIAL-CONTENTS is nil, do action immediately as if the user had
|
||
entered COMMENT. If COMMENT is t, also do action immediately with an
|
||
empty comment. Remember the file's buffer in `vc-parent-buffer'
|
||
\(current one if no file). AFTER-HOOK specifies the local value
|
||
for vc-log-operation-hook."
|
||
(let ((parent (or (and file (get-file-buffer file)) (current-buffer))))
|
||
(if vc-before-checkin-hook
|
||
(if file
|
||
(with-current-buffer parent
|
||
(run-hooks 'vc-before-checkin-hook))
|
||
(run-hooks 'vc-before-checkin-hook)))
|
||
(if (and comment (not initial-contents))
|
||
(set-buffer (get-buffer-create "*VC-log*"))
|
||
(pop-to-buffer (get-buffer-create "*VC-log*")))
|
||
(set (make-local-variable 'vc-parent-buffer) parent)
|
||
(set (make-local-variable 'vc-parent-buffer-name)
|
||
(concat " from " (buffer-name vc-parent-buffer)))
|
||
(if file (vc-mode-line file))
|
||
(vc-log-edit file)
|
||
(make-local-variable 'vc-log-after-operation-hook)
|
||
(if after-hook
|
||
(setq vc-log-after-operation-hook after-hook))
|
||
(setq vc-log-operation action)
|
||
(setq vc-log-version rev)
|
||
(when comment
|
||
(erase-buffer)
|
||
(when (stringp comment) (insert comment)))
|
||
(if (or (not comment) initial-contents)
|
||
(message "%s Type C-c C-c when done" msg)
|
||
(vc-finish-logentry (eq comment t)))))
|
||
|
||
(defun vc-checkout (file &optional writable rev)
|
||
"Retrieve a copy of the revision REV of FILE.
|
||
If WRITABLE is non-nil, make sure the retrieved file is writable.
|
||
REV defaults to the latest revision.
|
||
|
||
After check-out, runs the normal hook `vc-checkout-hook'."
|
||
(and writable
|
||
(not rev)
|
||
(vc-call make-version-backups-p file)
|
||
(vc-up-to-date-p file)
|
||
(vc-make-version-backup file))
|
||
(with-vc-properties
|
||
file
|
||
(condition-case err
|
||
(vc-call checkout file writable rev)
|
||
(file-error
|
||
;; Maybe the backend is not installed ;-(
|
||
(when writable
|
||
(let ((buf (get-file-buffer file)))
|
||
(when buf (with-current-buffer buf (toggle-read-only -1)))))
|
||
(signal (car err) (cdr err))))
|
||
`((vc-state . ,(if (or (eq (vc-checkout-model file) 'implicit)
|
||
(not writable))
|
||
(if (vc-call latest-on-branch-p file)
|
||
'up-to-date
|
||
'needs-patch)
|
||
'edited))
|
||
(vc-checkout-time . ,(nth 5 (file-attributes file)))))
|
||
(vc-resynch-buffer file t t)
|
||
(run-hooks 'vc-checkout-hook))
|
||
|
||
(defun vc-steal-lock (file rev owner)
|
||
"Steal the lock on FILE."
|
||
(let (file-description)
|
||
(if rev
|
||
(setq file-description (format "%s:%s" file rev))
|
||
(setq file-description file))
|
||
(if (not (yes-or-no-p (format "Steal the lock on %s from %s? "
|
||
file-description owner)))
|
||
(error "Steal canceled"))
|
||
(message "Stealing lock on %s..." file)
|
||
(with-vc-properties
|
||
file
|
||
(vc-call steal-lock file rev)
|
||
`((vc-state . edited)))
|
||
(vc-resynch-buffer file t t)
|
||
(message "Stealing lock on %s...done" file)
|
||
;; Write mail after actually stealing, because if the stealing
|
||
;; goes wrong, we don't want to send any mail.
|
||
(compose-mail owner (format "Stolen lock on %s" file-description))
|
||
(setq default-directory (expand-file-name "~/"))
|
||
(goto-char (point-max))
|
||
(insert
|
||
(format "I stole the lock on %s, " file-description)
|
||
(current-time-string)
|
||
".\n")
|
||
(message "Please explain why you stole the lock. Type C-c C-c when done.")))
|
||
|
||
(defun vc-checkin (file &optional rev comment initial-contents)
|
||
"Check in FILE.
|
||
The optional argument REV may be a string specifying the new version
|
||
level (if nil increment the current level). COMMENT is a comment
|
||
string; if omitted, a buffer is popped up to accept a comment. If
|
||
INITIAL-CONTENTS is non-nil, then COMMENT is used as the initial contents
|
||
of the log entry buffer.
|
||
|
||
If `vc-keep-workfiles' is nil, FILE is deleted afterwards, provided
|
||
that the version control system supports this mode of operation.
|
||
|
||
Runs the normal hook `vc-checkin-hook'."
|
||
(vc-start-entry
|
||
file rev comment initial-contents
|
||
"Enter a change comment."
|
||
(lambda (file rev comment)
|
||
(message "Checking in %s..." file)
|
||
;; "This log message intentionally left almost blank".
|
||
;; RCS 5.7 gripes about white-space-only comments too.
|
||
(or (and comment (string-match "[^\t\n ]" comment))
|
||
(setq comment "*** empty log message ***"))
|
||
(with-vc-properties
|
||
file
|
||
;; Change buffers to get local value of vc-checkin-switches.
|
||
(with-current-buffer (or (get-file-buffer file) (current-buffer))
|
||
(progn
|
||
(vc-call checkin file rev comment)
|
||
(vc-delete-automatic-version-backups file)))
|
||
`((vc-state . up-to-date)
|
||
(vc-checkout-time . ,(nth 5 (file-attributes file)))
|
||
(vc-workfile-version . nil)))
|
||
(message "Checking in %s...done" file))
|
||
'vc-checkin-hook))
|
||
|
||
(defun vc-comment-to-change-log (&optional whoami file-name)
|
||
"Enter last VC comment into the change log for the current file.
|
||
WHOAMI (interactive prefix) non-nil means prompt for user name
|
||
and site. FILE-NAME is the name of the change log; if nil, use
|
||
`change-log-default-name'.
|
||
|
||
This may be useful as a `vc-checkin-hook' to update change logs
|
||
automatically."
|
||
(interactive (if current-prefix-arg
|
||
(list current-prefix-arg
|
||
(prompt-for-change-log-name))))
|
||
;; Make sure the defvar for add-log-current-defun-function has been executed
|
||
;; before binding it.
|
||
(require 'add-log)
|
||
(let (;; Extract the comment first so we get any error before doing anything.
|
||
(comment (ring-ref vc-comment-ring 0))
|
||
;; Don't let add-change-log-entry insert a defun name.
|
||
(add-log-current-defun-function 'ignore)
|
||
end)
|
||
;; Call add-log to do half the work.
|
||
(add-change-log-entry whoami file-name t t)
|
||
;; Insert the VC comment, leaving point before it.
|
||
(setq end (save-excursion (insert comment) (point-marker)))
|
||
(if (looking-at "\\s *\\s(")
|
||
;; It starts with an open-paren, as in "(foo): Frobbed."
|
||
;; So remove the ": " add-log inserted.
|
||
(delete-char -2))
|
||
;; Canonicalize the white space between the file name and comment.
|
||
(just-one-space)
|
||
;; Indent rest of the text the same way add-log indented the first line.
|
||
(let ((indentation (current-indentation)))
|
||
(save-excursion
|
||
(while (< (point) end)
|
||
(forward-line 1)
|
||
(indent-to indentation))
|
||
(setq end (point))))
|
||
;; Fill the inserted text, preserving open-parens at bol.
|
||
(let ((paragraph-separate (concat paragraph-separate "\\|\\s *\\s("))
|
||
(paragraph-start (concat paragraph-start "\\|\\s *\\s(")))
|
||
(beginning-of-line)
|
||
(fill-region (point) end))
|
||
;; Canonicalize the white space at the end of the entry so it is
|
||
;; separated from the next entry by a single blank line.
|
||
(skip-syntax-forward " " end)
|
||
(delete-char (- (skip-syntax-backward " ")))
|
||
(or (eobp) (looking-at "\n\n")
|
||
(insert "\n"))))
|
||
|
||
(defun vc-finish-logentry (&optional nocomment)
|
||
"Complete the operation implied by the current log entry.
|
||
Use the contents of the current buffer as a check-in or registration
|
||
comment. If the optional arg NOCOMMENT is non-nil, then don't check
|
||
the buffer contents as a comment, and don't add it to
|
||
`vc-comment-ring'."
|
||
(interactive)
|
||
;; Check and record the comment, if any.
|
||
(unless nocomment
|
||
;; Comment too long?
|
||
(vc-call-backend (or (and vc-log-file (vc-backend vc-log-file))
|
||
(vc-responsible-backend default-directory))
|
||
'logentry-check)
|
||
(run-hooks 'vc-logentry-check-hook)
|
||
;; Record the comment in the comment ring
|
||
(let ((comment (buffer-string)))
|
||
(unless (and (ring-p vc-comment-ring)
|
||
(not (ring-empty-p vc-comment-ring))
|
||
(equal comment (ring-ref vc-comment-ring 0)))
|
||
(ring-insert vc-comment-ring comment))))
|
||
;; Sync parent buffer in case the user modified it while editing the comment.
|
||
;; But not if it is a vc-dired buffer.
|
||
(with-current-buffer vc-parent-buffer
|
||
(or vc-dired-mode (vc-buffer-sync)))
|
||
(if (not vc-log-operation) (error "No log operation is pending"))
|
||
;; save the parameters held in buffer-local variables
|
||
(let ((log-operation vc-log-operation)
|
||
(log-file vc-log-file)
|
||
(log-version vc-log-version)
|
||
(log-entry (buffer-string))
|
||
(after-hook vc-log-after-operation-hook)
|
||
(tmp-vc-parent-buffer vc-parent-buffer))
|
||
(pop-to-buffer vc-parent-buffer)
|
||
;; OK, do it to it
|
||
(save-excursion
|
||
(funcall log-operation
|
||
log-file
|
||
log-version
|
||
log-entry))
|
||
;; Remove checkin window (after the checkin so that if that fails
|
||
;; we don't zap the *VC-log* buffer and the typing therein).
|
||
(let ((logbuf (get-buffer "*VC-log*")))
|
||
(cond ((and logbuf vc-delete-logbuf-window)
|
||
(delete-windows-on logbuf (selected-frame))
|
||
;; Kill buffer and delete any other dedicated windows/frames.
|
||
(kill-buffer logbuf))
|
||
(logbuf (pop-to-buffer "*VC-log*")
|
||
(bury-buffer)
|
||
(pop-to-buffer tmp-vc-parent-buffer))))
|
||
;; Now make sure we see the expanded headers
|
||
(if log-file
|
||
(vc-resynch-buffer log-file vc-keep-workfiles t))
|
||
(if vc-dired-mode
|
||
(dired-move-to-filename))
|
||
(run-hooks after-hook 'vc-finish-logentry-hook)))
|
||
|
||
;; Code for access to the comment ring
|
||
|
||
(defun vc-new-comment-index (stride len)
|
||
"Return the comment index STRIDE elements from the current one.
|
||
LEN is the length of `vc-comment-ring'."
|
||
(mod (cond
|
||
(vc-comment-ring-index (+ vc-comment-ring-index stride))
|
||
;; Initialize the index on the first use of this command
|
||
;; so that the first M-p gets index 0, and the first M-n gets
|
||
;; index -1.
|
||
((> stride 0) (1- stride))
|
||
(t stride))
|
||
len))
|
||
|
||
(defun vc-previous-comment (arg)
|
||
"Cycle backwards through comment history.
|
||
With a numeric prefix ARG, go back ARG comments."
|
||
(interactive "*p")
|
||
(let ((len (ring-length vc-comment-ring)))
|
||
(if (<= len 0)
|
||
(progn (message "Empty comment ring") (ding))
|
||
(erase-buffer)
|
||
(setq vc-comment-ring-index (vc-new-comment-index arg len))
|
||
(message "Comment %d" (1+ vc-comment-ring-index))
|
||
(insert (ring-ref vc-comment-ring vc-comment-ring-index)))))
|
||
|
||
(defun vc-next-comment (arg)
|
||
"Cycle forwards through comment history.
|
||
With a numeric prefix ARG, go forward ARG comments."
|
||
(interactive "*p")
|
||
(vc-previous-comment (- arg)))
|
||
|
||
(defun vc-comment-search-reverse (str &optional stride)
|
||
"Search backwards through comment history for substring match of STR.
|
||
If the optional argument STRIDE is present, that is a step-width to use
|
||
when going through the comment ring."
|
||
;; Why substring rather than regexp ? -sm
|
||
(interactive
|
||
(list (read-string "Comment substring: " nil nil vc-last-comment-match)))
|
||
(unless stride (setq stride 1))
|
||
(if (string= str "")
|
||
(setq str vc-last-comment-match)
|
||
(setq vc-last-comment-match str))
|
||
(let* ((str (regexp-quote str))
|
||
(len (ring-length vc-comment-ring))
|
||
(n (vc-new-comment-index stride len)))
|
||
(while (progn (when (or (>= n len) (< n 0)) (error "Not found"))
|
||
(not (string-match str (ring-ref vc-comment-ring n))))
|
||
(setq n (+ n stride)))
|
||
(setq vc-comment-ring-index n)
|
||
(vc-previous-comment 0)))
|
||
|
||
(defun vc-comment-search-forward (str)
|
||
"Search forwards through comment history for a substring match of STR."
|
||
(interactive
|
||
(list (read-string "Comment substring: " nil nil vc-last-comment-match)))
|
||
(vc-comment-search-reverse str -1))
|
||
|
||
;; Additional entry points for examining version histories
|
||
|
||
;;;###autoload
|
||
(defun vc-diff (historic &optional not-urgent)
|
||
"Display diffs between file versions.
|
||
Normally this compares the current file and buffer with the most
|
||
recent checked in version of that file. This uses no arguments. With
|
||
a prefix argument HISTORIC, it reads the file name to use and two
|
||
version designators specifying which versions to compare. The
|
||
optional argument NOT-URGENT non-nil means it is ok to say no to
|
||
saving the buffer."
|
||
(interactive (list current-prefix-arg t))
|
||
(if historic
|
||
(call-interactively 'vc-version-diff)
|
||
(vc-ensure-vc-buffer)
|
||
(let ((file buffer-file-name))
|
||
(vc-buffer-sync not-urgent)
|
||
(if (vc-workfile-unchanged-p buffer-file-name)
|
||
(message "No changes to %s since latest version" file)
|
||
(vc-version-diff file nil nil)))))
|
||
|
||
(defun vc-version-diff (file rel1 rel2)
|
||
"List the differences between FILE's versions REL1 and REL2.
|
||
If REL1 is empty or nil it means to use the current workfile version;
|
||
REL2 empty or nil means the current file contents. FILE may also be
|
||
a directory, in that case, generate diffs between the correponding
|
||
versions of all registered files in or below it."
|
||
(interactive
|
||
(let ((file (expand-file-name
|
||
(read-file-name (if buffer-file-name
|
||
"File or dir to diff: (default visited file) "
|
||
"File or dir to diff: ")
|
||
default-directory buffer-file-name t)))
|
||
(rel1-default nil) (rel2-default nil))
|
||
;; compute default versions based on the file state
|
||
(cond
|
||
;; if it's a directory, don't supply any version default
|
||
((file-directory-p file)
|
||
nil)
|
||
;; if the file is not up-to-date, use current version as older version
|
||
((not (vc-up-to-date-p file))
|
||
(setq rel1-default (vc-workfile-version file)))
|
||
;; if the file is not locked, use last and previous version as default
|
||
(t
|
||
(setq rel1-default (vc-call previous-version file
|
||
(vc-workfile-version file)))
|
||
(if (string= rel1-default "") (setq rel1-default nil))
|
||
(setq rel2-default (vc-workfile-version file))))
|
||
;; construct argument list
|
||
(list file
|
||
(read-string (if rel1-default
|
||
(concat "Older version: (default "
|
||
rel1-default ") ")
|
||
"Older version: ")
|
||
nil nil rel1-default)
|
||
(read-string (if rel2-default
|
||
(concat "Newer version: (default "
|
||
rel2-default ") ")
|
||
"Newer version (default: current source): ")
|
||
nil nil rel2-default))))
|
||
(if (file-directory-p file)
|
||
;; recursive directory diff
|
||
(progn
|
||
(vc-setup-buffer "*vc-diff*")
|
||
(if (string-equal rel1 "") (setq rel1 nil))
|
||
(if (string-equal rel2 "") (setq rel2 nil))
|
||
(let ((inhibit-read-only t))
|
||
(insert "Diffs between "
|
||
(or rel1 "last version checked in")
|
||
" and "
|
||
(or rel2 "current workfile(s)")
|
||
":\n\n"))
|
||
(let ((dir (file-name-as-directory file)))
|
||
(vc-call-backend (vc-responsible-backend dir)
|
||
'diff-tree dir rel1 rel2))
|
||
(vc-exec-after `(let ((inhibit-read-only t))
|
||
(insert "\nEnd of diffs.\n"))))
|
||
;; single file diff
|
||
(vc-diff-internal file rel1 rel2))
|
||
(set-buffer "*vc-diff*")
|
||
(if (and (zerop (buffer-size))
|
||
(not (get-buffer-process (current-buffer))))
|
||
(progn
|
||
(if rel1
|
||
(if rel2
|
||
(message "No changes to %s between %s and %s" file rel1 rel2)
|
||
(message "No changes to %s since %s" file rel1))
|
||
(message "No changes to %s since latest version" file))
|
||
nil)
|
||
(pop-to-buffer (current-buffer))
|
||
;; Gnus-5.8.5 sets up an autoload for diff-mode, even if it's
|
||
;; not available. Work around that.
|
||
(if (require 'diff-mode nil t) (diff-mode))
|
||
(vc-exec-after '(let ((inhibit-read-only t))
|
||
(if (eq (buffer-size) 0)
|
||
(insert "No differences found.\n"))
|
||
(goto-char (point-min))
|
||
(shrink-window-if-larger-than-buffer)))
|
||
t))
|
||
|
||
(defun vc-diff-internal (file rel1 rel2)
|
||
"Run diff to compare FILE's revisions REL1 and REL2.
|
||
Output goes to the current buffer, which is assumed properly set up.
|
||
The exit status of the diff command is returned.
|
||
|
||
This function takes care to set up a proper coding system for diff output.
|
||
If both revisions are available as local files, then it also does not
|
||
actually call the backend, but performs a local diff."
|
||
(if (or (not rel1) (string-equal rel1 ""))
|
||
(setq rel1 (vc-workfile-version file)))
|
||
(if (string-equal rel2 "")
|
||
(setq rel2 nil))
|
||
(let ((file-rel1 (vc-version-backup-file file rel1))
|
||
(file-rel2 (if (not rel2)
|
||
file
|
||
(vc-version-backup-file file rel2)))
|
||
(coding-system-for-read (vc-coding-system-for-diff file)))
|
||
(if (and file-rel1 file-rel2)
|
||
(apply 'vc-do-command "*vc-diff*" 1 "diff" nil
|
||
(append (if (listp diff-switches)
|
||
diff-switches
|
||
(list diff-switches))
|
||
(if (listp vc-diff-switches)
|
||
vc-diff-switches
|
||
(list vc-diff-switches))
|
||
(list (file-relative-name file-rel1)
|
||
(file-relative-name file-rel2))))
|
||
(vc-call diff file rel1 rel2))))
|
||
|
||
(defmacro vc-diff-switches-list (backend)
|
||
"Return the list of switches to use for executing diff under BACKEND."
|
||
`(append
|
||
(if (listp diff-switches) diff-switches (list diff-switches))
|
||
(if (listp vc-diff-switches) vc-diff-switches (list vc-diff-switches))
|
||
(let* ((backend-switches-symbol
|
||
(intern (concat "vc-" (downcase (symbol-name ,backend))
|
||
"-diff-switches")))
|
||
(backend-switches
|
||
(if (boundp backend-switches-symbol)
|
||
(eval backend-switches-symbol)
|
||
nil)))
|
||
(if (listp backend-switches) backend-switches (list backend-switches)))))
|
||
|
||
(defun vc-default-diff-tree (backend dir rel1 rel2)
|
||
"List differences for all registered files at and below DIR.
|
||
The meaning of REL1 and REL2 is the same as for `vc-version-diff'."
|
||
;; This implementation does an explicit tree walk, and calls
|
||
;; vc-BACKEND-diff directly for each file. An optimization
|
||
;; would be to use `vc-diff-internal', so that diffs can be local,
|
||
;; and to call it only for files that are actually changed.
|
||
;; However, this is expensive for some backends, and so it is left
|
||
;; to backend-specific implementations.
|
||
(setq default-directory dir)
|
||
(vc-file-tree-walk
|
||
default-directory
|
||
(lambda (f)
|
||
(vc-exec-after
|
||
`(let ((coding-system-for-read (vc-coding-system-for-diff ',f)))
|
||
(message "Looking at %s" ',f)
|
||
(vc-call-backend ',(vc-backend f)
|
||
'diff ',f ',rel1 ',rel2))))))
|
||
|
||
(defun vc-coding-system-for-diff (file)
|
||
"Return the coding system for reading diff output for FILE."
|
||
(or coding-system-for-read
|
||
;; if we already have this file open,
|
||
;; use the buffer's coding system
|
||
(let ((buf (find-buffer-visiting file)))
|
||
(if buf (with-current-buffer buf
|
||
buffer-file-coding-system)))
|
||
;; otherwise, try to find one based on the file name
|
||
(car (find-operation-coding-system 'insert-file-contents file))
|
||
;; and a final fallback
|
||
'undecided))
|
||
|
||
;;;###autoload
|
||
(defun vc-version-other-window (rev)
|
||
"Visit version REV of the current file in another window.
|
||
If the current file is named `F', the version is named `F.~REV~'.
|
||
If `F.~REV~' already exists, use it instead of checking it out again."
|
||
(interactive "sVersion to visit (default is workfile version): ")
|
||
(vc-ensure-vc-buffer)
|
||
(let* ((file buffer-file-name)
|
||
(version (if (string-equal rev "")
|
||
(vc-workfile-version file)
|
||
rev)))
|
||
(switch-to-buffer-other-window (vc-find-version file version))))
|
||
|
||
(defun vc-find-version (file version)
|
||
"Read VERSION of FILE into a buffer and return the buffer."
|
||
(let ((automatic-backup (vc-version-backup-file-name file version))
|
||
(filebuf (or (get-file-buffer file) (current-buffer)))
|
||
(filename (vc-version-backup-file-name file version 'manual)))
|
||
(unless (file-exists-p filename)
|
||
(if (file-exists-p automatic-backup)
|
||
(rename-file automatic-backup filename nil)
|
||
(message "Checking out %s..." filename)
|
||
(with-current-buffer filebuf
|
||
(let ((failed t))
|
||
(unwind-protect
|
||
(let ((coding-system-for-read 'no-conversion)
|
||
(coding-system-for-write 'no-conversion))
|
||
(with-temp-file filename
|
||
(let ((outbuf (current-buffer)))
|
||
;; Change buffer to get local value of
|
||
;; vc-checkout-switches.
|
||
(with-current-buffer filebuf
|
||
(vc-call find-version file version outbuf))))
|
||
(setq failed nil))
|
||
(if (and failed (file-exists-p filename))
|
||
(delete-file filename))))
|
||
(vc-mode-line file))
|
||
(message "Checking out %s...done" filename)))
|
||
(find-file-noselect filename)))
|
||
|
||
(defun vc-default-find-version (backend file rev buffer)
|
||
"Provide the new `find-version' op based on the old `checkout' op.
|
||
This is only for compatibility with old backends. They should be updated
|
||
to provide the `find-version' operation instead."
|
||
(let ((tmpfile (make-temp-file (expand-file-name file))))
|
||
(unwind-protect
|
||
(progn
|
||
(vc-call-backend backend 'checkout file nil rev tmpfile)
|
||
(with-current-buffer buffer
|
||
(insert-file-contents-literally tmpfile)))
|
||
(delete-file tmpfile))))
|
||
|
||
;; Header-insertion code
|
||
|
||
;;;###autoload
|
||
(defun vc-insert-headers ()
|
||
"Insert headers into a file for use with a version control system.
|
||
Headers desired are inserted at point, and are pulled from
|
||
the variable `vc-BACKEND-header'."
|
||
(interactive)
|
||
(vc-ensure-vc-buffer)
|
||
(save-excursion
|
||
(save-restriction
|
||
(widen)
|
||
(if (or (not (vc-check-headers))
|
||
(y-or-n-p "Version headers already exist. Insert another set? "))
|
||
(progn
|
||
(let* ((delims (cdr (assq major-mode vc-comment-alist)))
|
||
(comment-start-vc (or (car delims) comment-start "#"))
|
||
(comment-end-vc (or (car (cdr delims)) comment-end ""))
|
||
(hdsym (vc-make-backend-sym (vc-backend (buffer-file-name))
|
||
'header))
|
||
(hdstrings (and (boundp hdsym) (symbol-value hdsym))))
|
||
(mapcar (lambda (s)
|
||
(insert comment-start-vc "\t" s "\t"
|
||
comment-end-vc "\n"))
|
||
hdstrings)
|
||
(if vc-static-header-alist
|
||
(mapcar (lambda (f)
|
||
(if (string-match (car f) buffer-file-name)
|
||
(insert (format (cdr f) (car hdstrings)))))
|
||
vc-static-header-alist))
|
||
)
|
||
)))))
|
||
|
||
(defun vc-clear-headers (&optional file)
|
||
"Clear all version headers in the current buffer (or FILE).
|
||
The headers are reset to their non-expanded form."
|
||
(let* ((filename (or file buffer-file-name))
|
||
(visited (find-buffer-visiting filename))
|
||
(backend (vc-backend filename)))
|
||
(when (vc-find-backend-function backend 'clear-headers)
|
||
(if visited
|
||
(let ((context (vc-buffer-context)))
|
||
;; save-excursion may be able to relocate point and mark
|
||
;; properly. If it fails, vc-restore-buffer-context
|
||
;; will give it a second try.
|
||
(save-excursion
|
||
(vc-call-backend backend 'clear-headers))
|
||
(vc-restore-buffer-context context))
|
||
(set-buffer (find-file-noselect filename))
|
||
(vc-call-backend backend 'clear-headers)
|
||
(kill-buffer filename)))))
|
||
|
||
;;;###autoload
|
||
(defun vc-merge ()
|
||
"Merge changes between two versions into the current buffer's file.
|
||
This asks for two versions to merge from in the minibuffer. If the
|
||
first version is a branch number, then merge all changes from that
|
||
branch. If the first version is empty, merge news, i.e. recent changes
|
||
from the current branch.
|
||
|
||
See Info node `Merging'."
|
||
(interactive)
|
||
(vc-ensure-vc-buffer)
|
||
(vc-buffer-sync)
|
||
(let* ((file buffer-file-name)
|
||
(backend (vc-backend file))
|
||
(state (vc-state file))
|
||
first-version second-version status)
|
||
(cond
|
||
((stringp state)
|
||
(error "File is locked by %s" state))
|
||
((not (vc-editable-p file))
|
||
(if (y-or-n-p
|
||
"File must be checked out for merging. Check out now? ")
|
||
(vc-checkout file t)
|
||
(error "Merge aborted"))))
|
||
(setq first-version
|
||
(read-string (concat "Branch or version to merge from "
|
||
"(default: news on current branch): ")))
|
||
(if (string= first-version "")
|
||
(if (not (vc-find-backend-function backend 'merge-news))
|
||
(error "Sorry, merging news is not implemented for %s" backend)
|
||
(setq status (vc-call merge-news file)))
|
||
(if (not (vc-find-backend-function backend 'merge))
|
||
(error "Sorry, merging is not implemented for %s" backend)
|
||
(if (not (vc-branch-p first-version))
|
||
(setq second-version
|
||
(read-string "Second version: "
|
||
(concat (vc-branch-part first-version) ".")))
|
||
;; We want to merge an entire branch. Set versions
|
||
;; accordingly, so that vc-BACKEND-merge understands us.
|
||
(setq second-version first-version)
|
||
;; first-version must be the starting point of the branch
|
||
(setq first-version (vc-branch-part first-version)))
|
||
(setq status (vc-call merge file first-version second-version))))
|
||
(vc-maybe-resolve-conflicts file status "WORKFILE" "MERGE SOURCE")))
|
||
|
||
(defun vc-maybe-resolve-conflicts (file status &optional name-A name-B)
|
||
(vc-resynch-buffer file t (not (buffer-modified-p)))
|
||
(if (zerop status) (message "Merge successful")
|
||
(smerge-mode 1)
|
||
(if (y-or-n-p "Conflicts detected. Resolve them now? ")
|
||
(vc-resolve-conflicts name-A name-B)
|
||
(message "File contains conflict markers"))))
|
||
|
||
;;;###autoload
|
||
(defalias 'vc-resolve-conflicts 'smerge-ediff)
|
||
|
||
;; The VC directory major mode. Coopt Dired for this.
|
||
;; All VC commands get mapped into logical equivalents.
|
||
|
||
(defvar vc-dired-switches)
|
||
(defvar vc-dired-terse-mode)
|
||
|
||
(defvar vc-dired-mode-map
|
||
(let ((map (make-sparse-keymap))
|
||
(vmap (make-sparse-keymap)))
|
||
(define-key map "\C-xv" vmap)
|
||
(define-key map "v" vmap)
|
||
(set-keymap-parent vmap vc-prefix-map)
|
||
(define-key vmap "t" 'vc-dired-toggle-terse-mode)
|
||
map))
|
||
|
||
(define-derived-mode vc-dired-mode dired-mode "Dired under VC"
|
||
"The major mode used in VC directory buffers.
|
||
|
||
It works like Dired, but lists only files under version control, with
|
||
the current VC state of each file being indicated in the place of the
|
||
file's link count, owner, group and size. Subdirectories are also
|
||
listed, and you may insert them into the buffer as desired, like in
|
||
Dired.
|
||
|
||
All Dired commands operate normally, with the exception of `v', which
|
||
is redefined as the version control prefix, so that you can type
|
||
`vl', `v=' etc. to invoke `vc-print-log', `vc-diff', and the like on
|
||
the file named in the current Dired buffer line. `vv' invokes
|
||
`vc-next-action' on this file, or on all files currently marked.
|
||
There is a special command, `*l', to mark all files currently locked."
|
||
;; define-derived-mode does it for us in Emacs-21, but not in Emacs-20.
|
||
;; We do it here because dired might not be loaded yet
|
||
;; when vc-dired-mode-map is initialized.
|
||
(set-keymap-parent vc-dired-mode-map dired-mode-map)
|
||
(add-hook 'dired-after-readin-hook 'vc-dired-hook nil t)
|
||
;; The following is slightly modified from dired.el,
|
||
;; because file lines look a bit different in vc-dired-mode
|
||
;; (the column before the date does not end in a digit).
|
||
(set (make-local-variable 'dired-move-to-filename-regexp)
|
||
(let* ((l "\\([A-Za-z]\\|[^\0-\177]\\)")
|
||
;; In some locales, month abbreviations are as short as 2 letters,
|
||
;; and they can be followed by ".".
|
||
(month (concat l l "+\\.?"))
|
||
(s " ")
|
||
(yyyy "[0-9][0-9][0-9][0-9]")
|
||
(dd "[ 0-3][0-9]")
|
||
(HH:MM "[ 0-2][0-9]:[0-5][0-9]")
|
||
(seconds "[0-6][0-9]\\([.,][0-9]+\\)?")
|
||
(zone "[-+][0-2][0-9][0-5][0-9]")
|
||
(iso-mm-dd "[01][0-9]-[0-3][0-9]")
|
||
(iso-time (concat HH:MM "\\(:" seconds "\\( ?" zone "\\)?\\)?"))
|
||
(iso (concat "\\(\\(" yyyy "-\\)?" iso-mm-dd "[ T]" iso-time
|
||
"\\|" yyyy "-" iso-mm-dd "\\)"))
|
||
(western (concat "\\(" month s "+" dd "\\|" dd "\\.?" s month "\\)"
|
||
s "+"
|
||
"\\(" HH:MM "\\|" yyyy "\\)"))
|
||
(western-comma (concat month s "+" dd "," s "+" yyyy))
|
||
;; Japanese MS-Windows ls-lisp has one-digit months, and
|
||
;; omits the Kanji characters after month and day-of-month.
|
||
(mm "[ 0-1]?[0-9]")
|
||
(japanese
|
||
(concat mm l "?" s dd l "?" s "+"
|
||
"\\(" HH:MM "\\|" yyyy l "?" "\\)")))
|
||
;; the .* below ensures that we find the last match on a line
|
||
(concat ".*" s
|
||
"\\(" western "\\|" western-comma "\\|" japanese "\\|" iso "\\)"
|
||
s "+")))
|
||
(and (boundp 'vc-dired-switches)
|
||
vc-dired-switches
|
||
(set (make-local-variable 'dired-actual-switches)
|
||
vc-dired-switches))
|
||
(set (make-local-variable 'vc-dired-terse-mode) vc-dired-terse-display)
|
||
(setq vc-dired-mode t))
|
||
|
||
(defun vc-dired-toggle-terse-mode ()
|
||
"Toggle terse display in VC Dired."
|
||
(interactive)
|
||
(if (not vc-dired-mode)
|
||
nil
|
||
(setq vc-dired-terse-mode (not vc-dired-terse-mode))
|
||
(if vc-dired-terse-mode
|
||
(vc-dired-hook)
|
||
(revert-buffer))))
|
||
|
||
(defun vc-dired-mark-locked ()
|
||
"Mark all files currently locked."
|
||
(interactive)
|
||
(dired-mark-if (let ((f (dired-get-filename nil t)))
|
||
(and f
|
||
(not (file-directory-p f))
|
||
(not (vc-up-to-date-p f))))
|
||
"locked file"))
|
||
|
||
(define-key vc-dired-mode-map "*l" 'vc-dired-mark-locked)
|
||
|
||
(defun vc-default-dired-state-info (backend file)
|
||
(let ((state (vc-state file)))
|
||
(cond
|
||
((stringp state) (concat "(" state ")"))
|
||
((eq state 'edited) (concat "(" (vc-user-login-name) ")"))
|
||
((eq state 'needs-merge) "(merge)")
|
||
((eq state 'needs-patch) "(patch)")
|
||
((eq state 'unlocked-changes) "(stale)"))))
|
||
|
||
(defun vc-dired-reformat-line (vc-info)
|
||
"Reformat a directory-listing line.
|
||
Replace various columns with version control information, VC-INFO.
|
||
This code, like dired, assumes UNIX -l format."
|
||
(beginning-of-line)
|
||
(when (re-search-forward
|
||
;; Match link count, owner, group, size. Group may be missing,
|
||
;; and only the size is present in OS/2 -l format.
|
||
"^..[drwxlts-]+ \\( *[0-9]+\\( [^ ]+ +\\([^ ]+ +\\)?[0-9]+\\)?\\) "
|
||
(line-end-position) t)
|
||
(replace-match (substring (concat vc-info " ") 0 10)
|
||
t t nil 1)))
|
||
|
||
(defun vc-dired-hook ()
|
||
"Reformat the listing according to version control.
|
||
Called by dired after any portion of a vc-dired buffer has been read in."
|
||
(message "Getting version information... ")
|
||
(let (subdir filename (buffer-read-only nil) cvs-dir)
|
||
(goto-char (point-min))
|
||
(while (not (eobp))
|
||
(cond
|
||
;; subdir header line
|
||
((setq subdir (dired-get-subdir))
|
||
;; if the backend supports it, get the state
|
||
;; of all files in this directory at once
|
||
(let ((backend (vc-responsible-backend subdir)))
|
||
(if (vc-find-backend-function backend 'dir-state)
|
||
(vc-call-backend backend 'dir-state subdir)))
|
||
(forward-line 1)
|
||
;; erase (but don't remove) the "total" line
|
||
(delete-region (point) (line-end-position))
|
||
(beginning-of-line)
|
||
(forward-line 1))
|
||
;; file line
|
||
((setq filename (dired-get-filename nil t))
|
||
(cond
|
||
;; subdir
|
||
((file-directory-p filename)
|
||
(cond
|
||
((member (file-name-nondirectory filename)
|
||
vc-directory-exclusion-list)
|
||
(let ((pos (point)))
|
||
(dired-kill-tree filename)
|
||
(goto-char pos)
|
||
(dired-kill-line)))
|
||
(vc-dired-terse-mode
|
||
;; Don't show directories in terse mode. Don't use
|
||
;; dired-kill-line to remove it, because in recursive listings,
|
||
;; that would remove the directory contents as well.
|
||
(delete-region (line-beginning-position)
|
||
(progn (forward-line 1) (point))))
|
||
((string-match "\\`\\.\\.?\\'" (file-name-nondirectory filename))
|
||
(dired-kill-line))
|
||
(t
|
||
(vc-dired-reformat-line nil)
|
||
(forward-line 1))))
|
||
;; ordinary file
|
||
((and (vc-backend filename)
|
||
(not (and vc-dired-terse-mode
|
||
(vc-up-to-date-p filename))))
|
||
(vc-dired-reformat-line (vc-call dired-state-info filename))
|
||
(forward-line 1))
|
||
(t
|
||
(dired-kill-line))))
|
||
;; any other line
|
||
(t (forward-line 1))))
|
||
(vc-dired-purge))
|
||
(message "Getting version information... done")
|
||
(save-restriction
|
||
(widen)
|
||
(cond ((eq (count-lines (point-min) (point-max)) 1)
|
||
(goto-char (point-min))
|
||
(message "No files locked under %s" default-directory)))))
|
||
|
||
(defun vc-dired-purge ()
|
||
"Remove empty subdirs."
|
||
(let (subdir)
|
||
(goto-char (point-min))
|
||
(while (setq subdir (dired-get-subdir))
|
||
(forward-line 2)
|
||
(if (dired-get-filename nil t)
|
||
(if (not (dired-next-subdir 1 t))
|
||
(goto-char (point-max)))
|
||
(forward-line -2)
|
||
(if (not (string= (dired-current-directory) default-directory))
|
||
(dired-do-kill-lines t "")
|
||
;; We cannot remove the top level directory.
|
||
;; Just make it look a little nicer.
|
||
(forward-line 1)
|
||
(kill-line)
|
||
(if (not (dired-next-subdir 1 t))
|
||
(goto-char (point-max))))))
|
||
(goto-char (point-min))))
|
||
|
||
(defun vc-dired-buffers-for-dir (dir)
|
||
"Return a list of all vc-dired buffers that currently display DIR."
|
||
(let (result)
|
||
;; Check whether dired is loaded.
|
||
(when (fboundp 'dired-buffers-for-dir)
|
||
(mapcar (lambda (buffer)
|
||
(with-current-buffer buffer
|
||
(if vc-dired-mode
|
||
(setq result (append result (list buffer))))))
|
||
(dired-buffers-for-dir dir)))
|
||
result))
|
||
|
||
(defun vc-dired-resynch-file (file)
|
||
"Update the entries for FILE in any VC Dired buffers that list it."
|
||
(let ((buffers (vc-dired-buffers-for-dir (file-name-directory file))))
|
||
(when buffers
|
||
(mapcar (lambda (buffer)
|
||
(with-current-buffer buffer
|
||
(if (dired-goto-file file)
|
||
;; bind vc-dired-terse-mode to nil so that
|
||
;; files won't vanish when they are checked in
|
||
(let ((vc-dired-terse-mode nil))
|
||
(dired-do-redisplay 1)))))
|
||
buffers))))
|
||
|
||
;;;###autoload
|
||
(defun vc-directory (dir read-switches)
|
||
"Create a buffer in VC Dired Mode for directory DIR.
|
||
|
||
See Info node `VC Dired Mode'.
|
||
|
||
With prefix arg READ-SWITCHES, specify a value to override
|
||
`dired-listing-switches' when generating the listing."
|
||
(interactive "DDired under VC (directory): \nP")
|
||
(let ((vc-dired-switches (concat vc-dired-listing-switches
|
||
(if vc-dired-recurse "R" ""))))
|
||
(if read-switches
|
||
(setq vc-dired-switches
|
||
(read-string "Dired listing switches: "
|
||
vc-dired-switches)))
|
||
(require 'dired)
|
||
(require 'dired-aux)
|
||
(switch-to-buffer
|
||
(dired-internal-noselect (expand-file-name (file-name-as-directory dir))
|
||
vc-dired-switches
|
||
'vc-dired-mode))))
|
||
|
||
|
||
;; Named-configuration entry points
|
||
|
||
(defun vc-snapshot-precondition (dir)
|
||
"Scan the tree below DIR, looking for files not up-to-date.
|
||
If any file is not up-to-date, return the name of the first such file.
|
||
\(This means, neither snapshot creation nor retrieval is allowed.\)
|
||
If one or more of the files are currently visited, return `visited'.
|
||
Otherwise, return nil."
|
||
(let ((status nil))
|
||
(catch 'vc-locked-example
|
||
(vc-file-tree-walk
|
||
dir
|
||
(lambda (f)
|
||
(if (not (vc-up-to-date-p f)) (throw 'vc-locked-example f)
|
||
(if (get-file-buffer f) (setq status 'visited)))))
|
||
status)))
|
||
|
||
;;;###autoload
|
||
(defun vc-create-snapshot (dir name branchp)
|
||
"Descending recursively from DIR, make a snapshot called NAME.
|
||
For each registered file, the version level of its latest version
|
||
becomes part of the named configuration. If the prefix argument
|
||
BRANCHP is given, the snapshot is made as a new branch and the files
|
||
are checked out in that new branch."
|
||
(interactive
|
||
(list (read-file-name "Directory: " default-directory default-directory t)
|
||
(read-string "New snapshot name: ")
|
||
current-prefix-arg))
|
||
(message "Making %s... " (if branchp "branch" "snapshot"))
|
||
(if (file-directory-p dir) (setq dir (file-name-as-directory dir)))
|
||
(vc-call-backend (vc-responsible-backend dir)
|
||
'create-snapshot dir name branchp)
|
||
(message "Making %s... done" (if branchp "branch" "snapshot")))
|
||
|
||
(defun vc-default-create-snapshot (backend dir name branchp)
|
||
(when branchp
|
||
(error "VC backend %s does not support module branches" backend))
|
||
(let ((result (vc-snapshot-precondition dir)))
|
||
(if (stringp result)
|
||
(error "File %s is not up-to-date" result)
|
||
(vc-file-tree-walk
|
||
dir
|
||
(lambda (f)
|
||
(vc-call assign-name f name))))))
|
||
|
||
;;;###autoload
|
||
(defun vc-retrieve-snapshot (dir name)
|
||
"Descending recursively from DIR, retrieve the snapshot called NAME.
|
||
If NAME is empty, it refers to the latest versions.
|
||
If locking is used for the files in DIR, then there must not be any
|
||
locked files at or below DIR (but if NAME is empty, locked files are
|
||
allowed and simply skipped)."
|
||
(interactive
|
||
(list (read-file-name "Directory: " default-directory default-directory t)
|
||
(read-string "Snapshot name to retrieve (default latest versions): ")))
|
||
(let ((update (yes-or-no-p "Update any affected buffers? "))
|
||
(msg (if (or (not name) (string= name ""))
|
||
(format "Updating %s... " (abbreviate-file-name dir))
|
||
(format "Retrieving snapshot into %s... "
|
||
(abbreviate-file-name dir)))))
|
||
(message msg)
|
||
(vc-call-backend (vc-responsible-backend dir)
|
||
'retrieve-snapshot dir name update)
|
||
(message (concat msg "done"))))
|
||
|
||
(defun vc-default-retrieve-snapshot (backend dir name update)
|
||
(if (string= name "")
|
||
(progn
|
||
(vc-file-tree-walk
|
||
dir
|
||
(lambda (f) (and
|
||
(vc-up-to-date-p f)
|
||
(vc-error-occurred
|
||
(vc-call checkout f nil "")
|
||
(if update (vc-resynch-buffer f t t)))))))
|
||
(let ((result (vc-snapshot-precondition dir)))
|
||
(if (stringp result)
|
||
(error "File %s is locked" result)
|
||
(setq update (and (eq result 'visited) update))
|
||
(vc-file-tree-walk
|
||
dir
|
||
(lambda (f) (vc-error-occurred
|
||
(vc-call checkout f nil name)
|
||
(if update (vc-resynch-buffer f t t)))))))))
|
||
|
||
;; Miscellaneous other entry points
|
||
|
||
;;;###autoload
|
||
(defun vc-print-log ()
|
||
"List the change log of the current buffer in a window."
|
||
(interactive)
|
||
(vc-ensure-vc-buffer)
|
||
(let ((file buffer-file-name))
|
||
(vc-call print-log file)
|
||
(set-buffer "*vc*")
|
||
(pop-to-buffer (current-buffer))
|
||
(log-view-mode)
|
||
(vc-exec-after
|
||
`(let ((inhibit-read-only t))
|
||
(goto-char (point-max)) (forward-line -1)
|
||
(while (looking-at "=*\n")
|
||
(delete-char (- (match-end 0) (match-beginning 0)))
|
||
(forward-line -1))
|
||
(goto-char (point-min))
|
||
(if (looking-at "[\b\t\n\v\f\r ]+")
|
||
(delete-char (- (match-end 0) (match-beginning 0))))
|
||
(shrink-window-if-larger-than-buffer)
|
||
;; move point to the log entry for the current version
|
||
(vc-call-backend ',(vc-backend file)
|
||
'show-log-entry
|
||
',(vc-workfile-version file))
|
||
(set-buffer-modified-p nil)))))
|
||
|
||
(defun vc-default-show-log-entry (backend rev)
|
||
(log-view-goto-rev rev))
|
||
|
||
(defun vc-default-comment-history (backend file)
|
||
"Return a string with all log entries stored in BACKEND for FILE."
|
||
(if (vc-find-backend-function backend 'print-log)
|
||
(with-current-buffer "*vc*"
|
||
(vc-call print-log file)
|
||
(vc-call wash-log file)
|
||
(buffer-string))))
|
||
|
||
(defun vc-default-wash-log (backend file)
|
||
"Remove all non-comment information from log output.
|
||
This default implementation works for RCS logs; backends should override
|
||
it if their logs are not in RCS format."
|
||
(let ((separator (concat "^-+\nrevision [0-9.]+\ndate: .*\n"
|
||
"\\(branches: .*;\n\\)?"
|
||
"\\(\\*\\*\\* empty log message \\*\\*\\*\n\\)?")))
|
||
(goto-char (point-max)) (forward-line -1)
|
||
(while (looking-at "=*\n")
|
||
(delete-char (- (match-end 0) (match-beginning 0)))
|
||
(forward-line -1))
|
||
(goto-char (point-min))
|
||
(if (looking-at "[\b\t\n\v\f\r ]+")
|
||
(delete-char (- (match-end 0) (match-beginning 0))))
|
||
(goto-char (point-min))
|
||
(re-search-forward separator nil t)
|
||
(delete-region (point-min) (point))
|
||
(while (re-search-forward separator nil t)
|
||
(delete-region (match-beginning 0) (match-end 0)))))
|
||
|
||
;;;###autoload
|
||
(defun vc-revert-buffer ()
|
||
"Revert the current buffer's file to the version it was based on.
|
||
This asks for confirmation if the buffer contents are not identical
|
||
to that version. This function does not automatically pick up newer
|
||
changes found in the master file; use \\[universal-argument] \\[vc-next-action] to do so."
|
||
(interactive)
|
||
(vc-ensure-vc-buffer)
|
||
;; Make sure buffer is saved. If the user says `no', abort since
|
||
;; we cannot show the changes and ask for confirmation to discard them.
|
||
(vc-buffer-sync nil)
|
||
(let ((file buffer-file-name)
|
||
;; This operation should always ask for confirmation.
|
||
(vc-suppress-confirm nil)
|
||
(obuf (current-buffer))
|
||
status)
|
||
(if (vc-up-to-date-p file)
|
||
(unless (yes-or-no-p "File seems up-to-date. Revert anyway? ")
|
||
(error "Revert canceled")))
|
||
(unless (vc-workfile-unchanged-p file)
|
||
;; vc-diff selects the new window, which is not what we want:
|
||
;; if the new window is on another frame, that'd require the user
|
||
;; moving her mouse to answer the yes-or-no-p question.
|
||
(let ((win (save-selected-window
|
||
(setq status (vc-diff nil t)) (selected-window))))
|
||
(vc-exec-after `(message nil))
|
||
(when status
|
||
(unwind-protect
|
||
(unless (yes-or-no-p "Discard changes? ")
|
||
(error "Revert canceled"))
|
||
(select-window win)
|
||
(if (one-window-p t)
|
||
(if (window-dedicated-p (selected-window))
|
||
(make-frame-invisible))
|
||
(delete-window))))))
|
||
(set-buffer obuf)
|
||
;; Do the reverting
|
||
(message "Reverting %s..." file)
|
||
(vc-revert-file file)
|
||
(message "Reverting %s...done" file)))
|
||
|
||
;;;###autoload
|
||
(defun vc-update ()
|
||
"Update the current buffer's file to the latest version on its branch.
|
||
If the file contains no changes, and is not locked, then this simply replaces
|
||
the working file with the latest version on its branch. If the file contains
|
||
changes, and the backend supports merging news, then any recent changes from
|
||
the current branch are merged into the working file."
|
||
(interactive)
|
||
(vc-ensure-vc-buffer)
|
||
(vc-buffer-sync nil)
|
||
(let ((file buffer-file-name))
|
||
(if (vc-up-to-date-p file)
|
||
(vc-checkout file nil "")
|
||
(if (eq (vc-checkout-model file) 'locking)
|
||
(if (eq (vc-state file) 'edited)
|
||
(error
|
||
(substitute-command-keys
|
||
"File is locked--type \\[vc-revert-buffer] to discard changes"))
|
||
(error
|
||
(substitute-command-keys
|
||
"Unexpected file state (%s)--type \\[vc-next-action] to correct")
|
||
(vc-state file)))
|
||
(if (not (vc-find-backend-function (vc-backend file) 'merge-news))
|
||
(error "Sorry, merging news is not implemented for %s"
|
||
(vc-backend file))
|
||
(vc-call merge-news file)
|
||
(vc-resynch-window file t t))))))
|
||
|
||
(defun vc-version-backup-file (file &optional rev)
|
||
"Return name of backup file for revision REV of FILE.
|
||
If version backups should be used for FILE, and there exists
|
||
such a backup for REV or the current workfile version of file,
|
||
return its name; otherwise return nil."
|
||
(when (vc-call make-version-backups-p file)
|
||
(let ((backup-file (vc-version-backup-file-name file rev)))
|
||
(if (file-exists-p backup-file)
|
||
backup-file
|
||
;; there is no automatic backup, but maybe the user made one manually
|
||
(setq backup-file (vc-version-backup-file-name file rev 'manual))
|
||
(if (file-exists-p backup-file)
|
||
backup-file)))))
|
||
|
||
(defun vc-revert-file (file)
|
||
"Revert FILE back to the version it was based on."
|
||
(with-vc-properties
|
||
file
|
||
(let ((backup-file (vc-version-backup-file file)))
|
||
(when backup-file
|
||
(copy-file backup-file file 'ok-if-already-exists 'keep-date)
|
||
(vc-delete-automatic-version-backups file))
|
||
(vc-call revert file backup-file))
|
||
`((vc-state . up-to-date)
|
||
(vc-checkout-time . ,(nth 5 (file-attributes file)))))
|
||
(vc-resynch-buffer file t t))
|
||
|
||
;;;###autoload
|
||
(defun vc-cancel-version (norevert)
|
||
"Get rid of most recently checked in version of this file.
|
||
A prefix argument NOREVERT means do not revert the buffer afterwards."
|
||
(interactive "P")
|
||
(vc-ensure-vc-buffer)
|
||
(let* ((file (buffer-file-name))
|
||
(backend (vc-backend file))
|
||
(target (vc-workfile-version file))
|
||
(config (current-window-configuration)) done)
|
||
(cond
|
||
((not (vc-find-backend-function backend 'cancel-version))
|
||
(error "Sorry, canceling versions is not supported under %s" backend))
|
||
((not (vc-call latest-on-branch-p file))
|
||
(error "This is not the latest version; VC cannot cancel it"))
|
||
((not (vc-up-to-date-p file))
|
||
(error (substitute-command-keys "File is not up to date; use \\[vc-revert-buffer] to discard changes"))))
|
||
(if (null (yes-or-no-p (format "Remove version %s from master? " target)))
|
||
(error "Aborted")
|
||
(setq norevert (or norevert (not
|
||
(yes-or-no-p "Revert buffer to most recent remaining version? "))))
|
||
|
||
(message "Removing last change from %s..." file)
|
||
(with-vc-properties
|
||
file
|
||
(vc-call cancel-version file norevert)
|
||
`((vc-state . ,(if norevert 'edited 'up-to-date))
|
||
(vc-checkout-time . ,(if norevert
|
||
0
|
||
(nth 5 (file-attributes file))))
|
||
(vc-workfile-version . nil)))
|
||
(message "Removing last change from %s...done" file)
|
||
|
||
(cond
|
||
(norevert ;; clear version headers and mark the buffer modified
|
||
(set-visited-file-name file)
|
||
(when (not vc-make-backup-files)
|
||
;; inhibit backup for this buffer
|
||
(make-local-variable 'backup-inhibited)
|
||
(setq backup-inhibited t))
|
||
(setq buffer-read-only nil)
|
||
(vc-clear-headers)
|
||
(vc-mode-line file)
|
||
(vc-dired-resynch-file file))
|
||
(t ;; revert buffer to file on disk
|
||
(vc-resynch-buffer file t t)))
|
||
(message "Version %s has been removed from the master" target))))
|
||
|
||
;;;###autoload
|
||
(defun vc-switch-backend (file backend)
|
||
"Make BACKEND the current version control system for FILE.
|
||
FILE must already be registered in BACKEND. The change is not
|
||
permanent, only for the current session. This function only changes
|
||
VC's perspective on FILE, it does not register or unregister it.
|
||
By default, this command cycles through the registered backends.
|
||
To get a prompt, use a prefix argument."
|
||
(interactive
|
||
(list
|
||
buffer-file-name
|
||
(let ((backend (vc-backend buffer-file-name))
|
||
(backends nil))
|
||
;; Find the registered backends.
|
||
(dolist (backend vc-handled-backends)
|
||
(when (vc-call-backend backend 'registered buffer-file-name)
|
||
(push backend backends)))
|
||
;; Find the next backend.
|
||
(let ((def (car (delq backend (append (memq backend backends) backends))))
|
||
(others (delete backend backends)))
|
||
(cond
|
||
((null others) (error "No other backend to switch to"))
|
||
(current-prefix-arg
|
||
(intern
|
||
(upcase
|
||
(completing-read
|
||
(format "Switch to backend [%s]: " def)
|
||
(mapcar (lambda (b) (list (downcase (symbol-name b)))) backends)
|
||
nil t nil nil (downcase (symbol-name def))))))
|
||
(t def))))))
|
||
(unless (eq backend (vc-backend file))
|
||
(vc-file-clearprops file)
|
||
(vc-file-setprop file 'vc-backend backend)
|
||
;; Force recomputation of the state
|
||
(unless (vc-call-backend backend 'registered file)
|
||
(vc-file-clearprops file)
|
||
(error "%s is not registered in %s" file backend))
|
||
(vc-mode-line file)))
|
||
|
||
;;;###autoload
|
||
(defun vc-transfer-file (file new-backend)
|
||
"Transfer FILE to another version control system NEW-BACKEND.
|
||
If NEW-BACKEND has a higher precedence than FILE's current backend
|
||
\(i.e. it comes earlier in `vc-handled-backends'), then register FILE in
|
||
NEW-BACKEND, using the version number from the current backend as the
|
||
base level. If NEW-BACKEND has a lower precedence than the current
|
||
backend, then commit all changes that were made under the current
|
||
backend to NEW-BACKEND, and unregister FILE from the current backend.
|
||
\(If FILE is not yet registered under NEW-BACKEND, register it.)"
|
||
(let* ((old-backend (vc-backend file))
|
||
(edited (memq (vc-state file) '(edited needs-merge)))
|
||
(registered (vc-call-backend new-backend 'registered file))
|
||
(move
|
||
(and registered ; Never move if not registered in new-backend yet.
|
||
;; move if new-backend comes later in vc-handled-backends
|
||
(or (memq new-backend (memq old-backend vc-handled-backends))
|
||
(y-or-n-p "Final transfer? "))))
|
||
(comment nil))
|
||
(if (eq old-backend new-backend)
|
||
(error "%s is the current backend of %s" new-backend file))
|
||
(if registered
|
||
(set-file-modes file (logior (file-modes file) 128))
|
||
;; `registered' might have switched under us.
|
||
(vc-switch-backend file old-backend)
|
||
(let* ((rev (vc-workfile-version file))
|
||
(modified-file (and edited (make-temp-file file)))
|
||
(unmodified-file (and modified-file (vc-version-backup-file file))))
|
||
;; Go back to the base unmodified file.
|
||
(unwind-protect
|
||
(progn
|
||
(when modified-file
|
||
(copy-file file modified-file 'ok-if-already-exists)
|
||
;; If we have a local copy of the unmodified file, handle that
|
||
;; here and not in vc-revert-file because we don't want to
|
||
;; delete that copy -- it is still useful for OLD-BACKEND.
|
||
(if unmodified-file
|
||
(copy-file unmodified-file file 'ok-if-already-exists)
|
||
(if (y-or-n-p "Get base version from master? ")
|
||
(vc-revert-file file))))
|
||
(vc-call-backend new-backend 'receive-file file rev))
|
||
(when modified-file
|
||
(vc-switch-backend file new-backend)
|
||
(unless (eq (vc-checkout-model file) 'implicit)
|
||
(vc-checkout file t nil))
|
||
(rename-file modified-file file 'ok-if-already-exists)
|
||
(vc-file-setprop file 'vc-checkout-time nil)))))
|
||
(when move
|
||
(vc-switch-backend file old-backend)
|
||
(setq comment (vc-call comment-history file))
|
||
(vc-call unregister file))
|
||
(vc-switch-backend file new-backend)
|
||
(when (or move edited)
|
||
(vc-file-setprop file 'vc-state 'edited)
|
||
(vc-mode-line file)
|
||
(vc-checkin file nil comment (stringp comment)))))
|
||
|
||
(defun vc-default-unregister (backend file)
|
||
"Default implementation of `vc-unregister', signals an error."
|
||
(error "Unregistering files is not supported for %s" backend))
|
||
|
||
(defun vc-default-receive-file (backend file rev)
|
||
"Let BACKEND receive FILE from another version control system."
|
||
(vc-call-backend backend 'register file rev ""))
|
||
|
||
(defun vc-rename-master (oldmaster newfile templates)
|
||
"Rename OLDMASTER to be the master file for NEWFILE based on TEMPLATES."
|
||
(let* ((dir (file-name-directory (expand-file-name oldmaster)))
|
||
(newdir (or (file-name-directory newfile) ""))
|
||
(newbase (file-name-nondirectory newfile))
|
||
(masters
|
||
;; List of potential master files for `newfile'
|
||
(mapcar
|
||
(lambda (s) (vc-possible-master s newdir newbase))
|
||
templates)))
|
||
(if (or (file-symlink-p oldmaster)
|
||
(file-symlink-p (file-name-directory oldmaster)))
|
||
(error "This is unsafe in the presence of symbolic links"))
|
||
(rename-file
|
||
oldmaster
|
||
(catch 'found
|
||
;; If possible, keep the master file in the same directory.
|
||
(mapcar (lambda (f)
|
||
(if (and f (string= (file-name-directory (expand-file-name f))
|
||
dir))
|
||
(throw 'found f)))
|
||
masters)
|
||
;; If not, just use the first possible place.
|
||
(mapcar (lambda (f)
|
||
(and f
|
||
(or (not (setq dir (file-name-directory f)))
|
||
(file-directory-p dir))
|
||
(throw 'found f)))
|
||
masters)
|
||
(error "New file lacks a version control directory")))))
|
||
|
||
;;;###autoload
|
||
(defun vc-rename-file (old new)
|
||
"Rename file OLD to NEW, and rename its master file likewise."
|
||
(interactive "fVC rename file: \nFRename to: ")
|
||
(let ((oldbuf (get-file-buffer old))
|
||
(backend (vc-backend old)))
|
||
(unless (or (null backend) (vc-find-backend-function backend 'rename-file))
|
||
(error "Renaming files under %s is not supported in VC" backend))
|
||
(if (and oldbuf (buffer-modified-p oldbuf))
|
||
(error "Please save files before moving them"))
|
||
(if (get-file-buffer new)
|
||
(error "Already editing new file name"))
|
||
(if (file-exists-p new)
|
||
(error "New file already exists"))
|
||
(when backend
|
||
(if (and backend (not (vc-up-to-date-p old)))
|
||
(error "Please check in files before moving them"))
|
||
(vc-call-backend backend 'rename-file old new))
|
||
;; Move the actual file (unless the backend did it already)
|
||
(if (or (not backend) (file-exists-p old))
|
||
(rename-file old new))
|
||
;; ?? Renaming a file might change its contents due to keyword expansion.
|
||
;; We should really check out a new copy if the old copy was precisely equal
|
||
;; to some checked in version. However, testing for this is tricky....
|
||
(if oldbuf
|
||
(with-current-buffer oldbuf
|
||
(let ((buffer-read-only buffer-read-only))
|
||
(set-visited-file-name new))
|
||
(vc-backend new)
|
||
(vc-mode-line new)
|
||
(set-buffer-modified-p nil)))))
|
||
|
||
;; Only defined in very recent Emacsen
|
||
(defvar small-temporary-file-directory nil)
|
||
|
||
;;;###autoload
|
||
(defun vc-update-change-log (&rest args)
|
||
"Find change log file and add entries from recent version control logs.
|
||
Normally, find log entries for all registered files in the default
|
||
directory.
|
||
|
||
With prefix arg of \\[universal-argument], only find log entries for the current buffer's file.
|
||
|
||
With any numeric prefix arg, find log entries for all currently visited
|
||
files that are under version control. This puts all the entries in the
|
||
log for the default directory, which may not be appropriate.
|
||
|
||
From a program, any ARGS are assumed to be filenames for which
|
||
log entries should be gathered."
|
||
(interactive
|
||
(cond ((consp current-prefix-arg) ;C-u
|
||
(list buffer-file-name))
|
||
(current-prefix-arg ;Numeric argument.
|
||
(let ((files nil)
|
||
(buffers (buffer-list))
|
||
file)
|
||
(while buffers
|
||
(setq file (buffer-file-name (car buffers)))
|
||
(and file (vc-backend file)
|
||
(setq files (cons file files)))
|
||
(setq buffers (cdr buffers)))
|
||
files))
|
||
(t
|
||
;; Don't supply any filenames to backend; this means
|
||
;; it should find all relevant files relative to
|
||
;; the default-directory.
|
||
nil)))
|
||
(vc-call-backend (vc-responsible-backend default-directory)
|
||
'update-changelog args))
|
||
|
||
(defun vc-default-update-changelog (backend files)
|
||
"Default implementation of update-changelog.
|
||
Uses `rcs2log' which only works for RCS and CVS."
|
||
;; FIXME: We (c|sh)ould add support for cvs2cl
|
||
(let ((odefault default-directory)
|
||
(changelog (find-change-log))
|
||
;; Presumably not portable to non-Unixy systems, along with rcs2log:
|
||
(tempfile (make-temp-file
|
||
(expand-file-name "vc"
|
||
(or small-temporary-file-directory
|
||
temporary-file-directory))))
|
||
(full-name (or add-log-full-name
|
||
(user-full-name)
|
||
(user-login-name)
|
||
(format "uid%d" (number-to-string (user-uid)))))
|
||
(mailing-address (or add-log-mailing-address
|
||
user-mail-address)))
|
||
(find-file-other-window changelog)
|
||
(barf-if-buffer-read-only)
|
||
(vc-buffer-sync)
|
||
(undo-boundary)
|
||
(goto-char (point-min))
|
||
(push-mark)
|
||
(message "Computing change log entries...")
|
||
(message "Computing change log entries... %s"
|
||
(unwind-protect
|
||
(progn
|
||
(setq default-directory odefault)
|
||
(if (eq 0 (apply 'call-process
|
||
(expand-file-name "rcs2log"
|
||
exec-directory)
|
||
nil (list t tempfile) nil
|
||
"-c" changelog
|
||
"-u" (concat (vc-user-login-name)
|
||
"\t" full-name
|
||
"\t" mailing-address)
|
||
(mapcar
|
||
(lambda (f)
|
||
(file-relative-name
|
||
(if (file-name-absolute-p f)
|
||
f
|
||
(concat odefault f))))
|
||
files)))
|
||
"done"
|
||
(pop-to-buffer
|
||
(set-buffer (get-buffer-create "*vc*")))
|
||
(erase-buffer)
|
||
(insert-file tempfile)
|
||
"failed"))
|
||
(setq default-directory (file-name-directory changelog))
|
||
(delete-file tempfile)))))
|
||
|
||
;; Annotate functionality
|
||
|
||
;; Declare globally instead of additional parameter to
|
||
;; temp-buffer-show-function (not possible to pass more than one
|
||
;; parameter). The use of annotate-ratio is deprecated in favor of
|
||
;; annotate-mode, which replaces it with the more sensible "span-to
|
||
;; days", along with autoscaling support.
|
||
(defvar vc-annotate-ratio nil "Global variable.")
|
||
(defvar vc-annotate-backend nil "Global variable.")
|
||
|
||
(defconst vc-annotate-font-lock-keywords
|
||
;; The fontification is done by vc-annotate-lines instead of font-lock.
|
||
'((vc-annotate-lines)))
|
||
|
||
(defun vc-annotate-get-backend (buffer)
|
||
"Return the backend matching \"Annotate\" buffer BUFFER.
|
||
Return nil if no match made. Associations are made based on
|
||
`vc-annotate-buffers'."
|
||
(cdr (assoc buffer vc-annotate-buffers)))
|
||
|
||
(define-derived-mode vc-annotate-mode fundamental-mode "Annotate"
|
||
"Major mode for output buffers of the `vc-annotate' command.
|
||
|
||
You can use the mode-specific menu to alter the time-span of the used
|
||
colors. See variable `vc-annotate-menu-elements' for customizing the
|
||
menu items."
|
||
(set (make-local-variable 'truncate-lines) t)
|
||
(set (make-local-variable 'font-lock-defaults)
|
||
'(vc-annotate-font-lock-keywords t))
|
||
(vc-annotate-add-menu))
|
||
|
||
(defun vc-annotate-display-default (&optional ratio)
|
||
"Display the output of \\[vc-annotate] using the default color range.
|
||
The color range is given by `vc-annotate-color-map', scaled by RATIO
|
||
if present. The current time is used as the offset."
|
||
(interactive "e")
|
||
(message "Redisplaying annotation...")
|
||
(vc-annotate-display
|
||
(if ratio (vc-annotate-time-span vc-annotate-color-map ratio)))
|
||
(message "Redisplaying annotation...done"))
|
||
|
||
(defun vc-annotate-display-autoscale (&optional full)
|
||
"Highlight the output of \\[vc-annotate]] using an autoscaled color map.
|
||
Autoscaling means that the map is scaled from the current time to the
|
||
oldest annotation in the buffer, or, with argument FULL non-nil, to
|
||
cover the range from the oldest annotation to the newest."
|
||
(interactive)
|
||
(let ((newest 0.0)
|
||
(oldest 999999.) ;Any CVS users at the founding of Rome?
|
||
(current (vc-annotate-convert-time (current-time)))
|
||
date)
|
||
(message "Redisplaying annotation...")
|
||
;; Run through this file and find the oldest and newest dates annotated.
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(while (setq date (vc-call-backend vc-annotate-backend 'annotate-time))
|
||
(if (> date newest)
|
||
(setq newest date))
|
||
(if (< date oldest)
|
||
(setq oldest date))))
|
||
(vc-annotate-display
|
||
(vc-annotate-time-span ;return the scaled colormap.
|
||
vc-annotate-color-map
|
||
(/ (- (if full newest current) oldest)
|
||
(vc-annotate-car-last-cons vc-annotate-color-map)))
|
||
(if full newest))
|
||
(message "Redisplaying annotation...done \(%s\)"
|
||
(if full
|
||
(format "Spanned from %.1f to %.1f days old"
|
||
(- current oldest)
|
||
(- current newest))
|
||
(format "Spanned to %.1f days old" (- current oldest))))))
|
||
|
||
;; Menu -- Using easymenu.el
|
||
(defun vc-annotate-add-menu ()
|
||
"Add the menu 'Annotate' to the menu bar in VC-Annotate mode."
|
||
(let ((menu-elements vc-annotate-menu-elements)
|
||
(menu-def
|
||
'("VC-Annotate"
|
||
["Default" (unless (null vc-annotate-display-mode)
|
||
(setq vc-annotate-display-mode nil)
|
||
(vc-annotate-display-select))
|
||
:style toggle :selected (null vc-annotate-display-mode)]))
|
||
(oldest-in-map (vc-annotate-car-last-cons vc-annotate-color-map)))
|
||
(while menu-elements
|
||
(let* ((element (car menu-elements))
|
||
(days (* element oldest-in-map)))
|
||
(setq menu-elements (cdr menu-elements))
|
||
(setq menu-def
|
||
(append menu-def
|
||
`([,(format "Span %.1f days" days)
|
||
(unless (and (numberp vc-annotate-display-mode)
|
||
(= vc-annotate-display-mode ,days))
|
||
(vc-annotate-display-select nil ,days))
|
||
:style toggle :selected
|
||
(and (numberp vc-annotate-display-mode)
|
||
(= vc-annotate-display-mode ,days)) ])))))
|
||
(setq menu-def
|
||
(append menu-def
|
||
(list
|
||
["Span ..."
|
||
(let ((days
|
||
(float (string-to-number
|
||
(read-string "Span how many days? ")))))
|
||
(vc-annotate-display-select nil days)) t])
|
||
(list "--")
|
||
(list
|
||
["Span to Oldest"
|
||
(unless (eq vc-annotate-display-mode 'scale)
|
||
(vc-annotate-display-select nil 'scale))
|
||
:style toggle :selected
|
||
(eq vc-annotate-display-mode 'scale)])
|
||
(list
|
||
["Span Oldest->Newest"
|
||
(unless (eq vc-annotate-display-mode 'fullscale)
|
||
(vc-annotate-display-select nil 'fullscale))
|
||
:style toggle :selected
|
||
(eq vc-annotate-display-mode 'fullscale)])))
|
||
;; Define the menu
|
||
(if (or (featurep 'easymenu) (load "easymenu" t))
|
||
(easy-menu-define vc-annotate-mode-menu vc-annotate-mode-map
|
||
"VC Annotate Display Menu" menu-def))))
|
||
|
||
(defun vc-annotate-display-select (&optional buffer mode)
|
||
"Highlight the output of \\[vc-annotate].
|
||
By default, the current buffer is highlighted, unless overridden by
|
||
BUFFER. `vc-annotate-display-mode' specifies the highlighting mode to
|
||
use; you may override this using the second optional arg MODE."
|
||
(interactive)
|
||
(if mode (setq vc-annotate-display-mode mode))
|
||
(when buffer
|
||
(set-buffer buffer)
|
||
(display-buffer buffer))
|
||
(if (not vc-annotate-mode) ; Turn on vc-annotate-mode if not done
|
||
(vc-annotate-mode))
|
||
(cond ((null vc-annotate-display-mode)
|
||
(vc-annotate-display-default vc-annotate-ratio))
|
||
;; One of the auto-scaling modes
|
||
((eq vc-annotate-display-mode 'scale)
|
||
(vc-annotate-display-autoscale))
|
||
((eq vc-annotate-display-mode 'fullscale)
|
||
(vc-annotate-display-autoscale t))
|
||
((numberp vc-annotate-display-mode) ; A fixed number of days lookback
|
||
(vc-annotate-display-default
|
||
(/ vc-annotate-display-mode (vc-annotate-car-last-cons
|
||
vc-annotate-color-map))))
|
||
(t (error "No such display mode: %s"
|
||
vc-annotate-display-mode))))
|
||
|
||
;;;; (defun vc-BACKEND-annotate-command (file buffer) ...)
|
||
;;;; Execute "annotate" on FILE by using `call-process' and insert
|
||
;;;; the contents in BUFFER.
|
||
|
||
;;;###autoload
|
||
(defun vc-annotate (prefix)
|
||
"Display the edit history of the current file using colours.
|
||
|
||
This command creates a buffer that shows, for each line of the current
|
||
file, when it was last edited and by whom. Additionally, colours are
|
||
used to show the age of each line--blue means oldest, red means
|
||
youngest, and intermediate colours indicate intermediate ages. By
|
||
default, the time scale stretches back one year into the past;
|
||
everything that is older than that is shown in blue.
|
||
|
||
With a prefix argument, this command asks two questions in the
|
||
minibuffer. First, you may enter a version number; then the buffer
|
||
displays and annotates that version instead of the current version
|
||
\(type RET in the minibuffer to leave that default unchanged). Then,
|
||
you are prompted for the time span in days which the color range
|
||
should cover. For example, a time span of 20 days means that changes
|
||
over the past 20 days are shown in red to blue, according to their
|
||
age, and everything that is older than that is shown in blue.
|
||
|
||
Customization variables:
|
||
|
||
`vc-annotate-menu-elements' customizes the menu elements of the
|
||
mode-specific menu. `vc-annotate-color-map' and
|
||
`vc-annotate-very-old-color' defines the mapping of time to
|
||
colors. `vc-annotate-background' specifies the background color."
|
||
(interactive "P")
|
||
(vc-ensure-vc-buffer)
|
||
(let* ((temp-buffer-name (concat "*Annotate " (buffer-name) "*"))
|
||
(temp-buffer-show-function 'vc-annotate-display-select)
|
||
(rev (vc-workfile-version (buffer-file-name)))
|
||
(vc-annotate-version
|
||
(if prefix (read-string
|
||
(format "Annotate from version: (default %s) " rev)
|
||
nil nil rev)
|
||
rev)))
|
||
(if prefix
|
||
(setq vc-annotate-display-mode
|
||
(float (string-to-number
|
||
(read-string "Annotate span days: (default 20) "
|
||
nil nil "20")))))
|
||
(setq vc-annotate-backend (vc-backend (buffer-file-name)))
|
||
(message "Annotating...")
|
||
(if (not (vc-find-backend-function vc-annotate-backend 'annotate-command))
|
||
(error "Sorry, annotating is not implemented for %s"
|
||
vc-annotate-backend))
|
||
(with-output-to-temp-buffer temp-buffer-name
|
||
(vc-call-backend vc-annotate-backend 'annotate-command
|
||
(file-name-nondirectory (buffer-file-name))
|
||
(get-buffer temp-buffer-name)
|
||
vc-annotate-version))
|
||
;; Don't use the temp-buffer-name until the buffer is created
|
||
;; (only after `with-output-to-temp-buffer'.)
|
||
(setq vc-annotate-buffers
|
||
(append vc-annotate-buffers
|
||
(list (cons (get-buffer temp-buffer-name) vc-annotate-backend))))
|
||
(message "Annotating... done")))
|
||
|
||
(defun vc-annotate-car-last-cons (a-list)
|
||
"Return car of last cons in association list A-LIST."
|
||
(if (not (eq nil (cdr a-list)))
|
||
(vc-annotate-car-last-cons (cdr a-list))
|
||
(car (car a-list))))
|
||
|
||
(defun vc-annotate-time-span (a-list span &optional quantize)
|
||
"Apply factor SPAN to the time-span of association list A-LIST.
|
||
Return the new alist.
|
||
Optionally quantize to the factor of QUANTIZE."
|
||
;; Apply span to each car of every cons
|
||
(if (not (eq nil a-list))
|
||
(append (list (cons (* (car (car a-list)) span)
|
||
(cdr (car a-list))))
|
||
(vc-annotate-time-span (nthcdr (or quantize ; optional
|
||
1) ; Default to cdr
|
||
a-list) span quantize))))
|
||
|
||
(defun vc-annotate-compcar (threshold a-list)
|
||
"Test successive cons cells of A-LIST against THRESHOLD.
|
||
Return the first cons cell with a car that is not less than THRESHOLD,
|
||
nil if no such cell exists."
|
||
(let ((i 1)
|
||
(tmp-cons (car a-list)))
|
||
(while (and tmp-cons (< (car tmp-cons) threshold))
|
||
(setq tmp-cons (car (nthcdr i a-list)))
|
||
(setq i (+ i 1)))
|
||
tmp-cons)) ; Return the appropriate value
|
||
|
||
(defun vc-annotate-convert-time (time)
|
||
"Convert a time value to a floating-point number of days.
|
||
The argument TIME is a list as returned by `current-time' or
|
||
`encode-time', only the first two elements of that list are considered."
|
||
(/ (+ (* (float (car time)) (lsh 1 16)) (cadr time)) 24 3600))
|
||
|
||
(defun vc-annotate-difference (&optional offset)
|
||
"Return the time span in days to the next annotation.
|
||
This calls the backend function annotate-time, and returns the
|
||
difference in days between the time returned and the current time,
|
||
or OFFSET if present."
|
||
(let ((next-time (vc-call-backend vc-annotate-backend 'annotate-time)))
|
||
(if next-time
|
||
(- (or offset
|
||
(vc-call-backend vc-annotate-backend 'annotate-current-time))
|
||
next-time))))
|
||
|
||
(defun vc-default-annotate-current-time (backend)
|
||
"Return the current time, encoded as fractional days."
|
||
(vc-annotate-convert-time (current-time)))
|
||
|
||
(defun vc-annotate-display (&optional color-map offset)
|
||
"Highlight `vc-annotate' output in the current buffer.
|
||
COLOR-MAP, if present, overrides `vc-annotate-color-map'.
|
||
The annotations are relative to the current time, unless overridden by OFFSET."
|
||
(if (and color-map (not (eq color-map vc-annotate-color-map)))
|
||
(set (make-local-variable 'vc-annotate-color-map) color-map))
|
||
(set (make-local-variable 'vc-annotate-offset) offset)
|
||
(font-lock-mode 1))
|
||
(make-obsolete 'vc-annotate-display 'vc-annotate-display-select "21.4")
|
||
|
||
(defvar vc-annotate-offset nil)
|
||
|
||
(defun vc-annotate-lines (limit)
|
||
(let (difference)
|
||
(while (and (< (point) limit)
|
||
(setq difference (vc-annotate-difference vc-annotate-offset)))
|
||
(let* ((color (or (vc-annotate-compcar difference vc-annotate-color-map)
|
||
(cons nil vc-annotate-very-old-color)))
|
||
;; substring from index 1 to remove any leading `#' in the name
|
||
(face-name (concat "vc-annotate-face-" (substring (cdr color) 1)))
|
||
;; Make the face if not done.
|
||
(face (or (intern-soft face-name)
|
||
(let ((tmp-face (make-face (intern face-name))))
|
||
(set-face-foreground tmp-face (cdr color))
|
||
(if vc-annotate-background
|
||
(set-face-background tmp-face
|
||
vc-annotate-background))
|
||
tmp-face))) ; Return the face
|
||
(point (point))
|
||
overlay)
|
||
(forward-line 1)
|
||
(put-text-property point (point) 'face face)))
|
||
;; Pretend to font-lock there were no matches.
|
||
nil))
|
||
|
||
;; Collect back-end-dependent stuff here
|
||
|
||
(defalias 'vc-default-logentry-check 'ignore)
|
||
|
||
(defun vc-check-headers ()
|
||
"Check if the current file has any headers in it."
|
||
(interactive)
|
||
(vc-call-backend (vc-backend buffer-file-name) 'check-headers))
|
||
|
||
(defun vc-default-check-headers (backend)
|
||
"Default implementation of check-headers; always returns nil."
|
||
nil)
|
||
|
||
;; Back-end-dependent stuff ends here.
|
||
|
||
;; Set up key bindings for use while editing log messages
|
||
|
||
(defun vc-log-edit (file)
|
||
"Set up `log-edit' for use with VC on FILE."
|
||
(setq default-directory
|
||
(if file (file-name-directory file)
|
||
(with-current-buffer vc-parent-buffer default-directory)))
|
||
(log-edit 'vc-finish-logentry nil
|
||
(if file `(lambda () ',(list (file-name-nondirectory file)))
|
||
;; If FILE is nil, we were called from vc-dired.
|
||
(lambda ()
|
||
(with-current-buffer vc-parent-buffer
|
||
(dired-get-marked-files t)))))
|
||
(set (make-local-variable 'vc-log-file) file)
|
||
(make-local-variable 'vc-log-version)
|
||
(set-buffer-modified-p nil)
|
||
(setq buffer-file-name nil))
|
||
|
||
;; These things should probably be generally available
|
||
|
||
(defun vc-file-tree-walk (dirname func &rest args)
|
||
"Walk recursively through DIRNAME.
|
||
Invoke FUNC f ARGS on each VC-managed file f underneath it."
|
||
(vc-file-tree-walk-internal (expand-file-name dirname) func args)
|
||
(message "Traversing directory %s...done" dirname))
|
||
|
||
(defun vc-file-tree-walk-internal (file func args)
|
||
(if (not (file-directory-p file))
|
||
(if (vc-backend file) (apply func file args))
|
||
(message "Traversing directory %s..." (abbreviate-file-name file))
|
||
(let ((dir (file-name-as-directory file)))
|
||
(mapcar
|
||
(lambda (f) (or
|
||
(string-equal f ".")
|
||
(string-equal f "..")
|
||
(member f vc-directory-exclusion-list)
|
||
(let ((dirf (expand-file-name f dir)))
|
||
(or
|
||
(file-symlink-p dirf);; Avoid possible loops
|
||
(vc-file-tree-walk-internal dirf func args)))))
|
||
(directory-files dir)))))
|
||
|
||
(provide 'vc)
|
||
|
||
;; DEVELOPER'S NOTES ON CONCURRENCY PROBLEMS IN THIS CODE
|
||
;;
|
||
;; These may be useful to anyone who has to debug or extend the package.
|
||
;; (Note that this information corresponds to versions 5.x. Some of it
|
||
;; might have been invalidated by the additions to support branching
|
||
;; and RCS keyword lookup. AS, 1995/03/24)
|
||
;;
|
||
;; A fundamental problem in VC is that there are time windows between
|
||
;; vc-next-action's computations of the file's version-control state and
|
||
;; the actions that change it. This is a window open to lossage in a
|
||
;; multi-user environment; someone else could nip in and change the state
|
||
;; of the master during it.
|
||
;;
|
||
;; The performance problem is that rlog/prs calls are very expensive; we want
|
||
;; to avoid them as much as possible.
|
||
;;
|
||
;; ANALYSIS:
|
||
;;
|
||
;; The performance problem, it turns out, simplifies in practice to the
|
||
;; problem of making vc-state fast. The two other functions that call
|
||
;; prs/rlog will not be so commonly used that the slowdown is a problem; one
|
||
;; makes snapshots, the other deletes the calling user's last change in the
|
||
;; master.
|
||
;;
|
||
;; The race condition implies that we have to either (a) lock the master
|
||
;; during the entire execution of vc-next-action, or (b) detect and
|
||
;; recover from errors resulting from dispatch on an out-of-date state.
|
||
;;
|
||
;; Alternative (a) appears to be infeasible. The problem is that we can't
|
||
;; guarantee that the lock will ever be removed. Suppose a user starts a
|
||
;; checkin, the change message buffer pops up, and the user, having wandered
|
||
;; off to do something else, simply forgets about it?
|
||
;;
|
||
;; Alternative (b), on the other hand, works well with a cheap way to speed up
|
||
;; vc-state. Usually, if a file is registered, we can read its locked/
|
||
;; unlocked state and its current owner from its permissions.
|
||
;;
|
||
;; This shortcut will fail if someone has manually changed the workfile's
|
||
;; permissions; also if developers are munging the workfile in several
|
||
;; directories, with symlinks to a master (in this latter case, the
|
||
;; permissions shortcut will fail to detect a lock asserted from another
|
||
;; directory).
|
||
;;
|
||
;; Note that these cases correspond exactly to the errors which could happen
|
||
;; because of a competing checkin/checkout race in between two instances of
|
||
;; vc-next-action.
|
||
;;
|
||
;; For VC's purposes, a workfile/master pair may have the following states:
|
||
;;
|
||
;; A. Unregistered. There is a workfile, there is no master.
|
||
;;
|
||
;; B. Registered and not locked by anyone.
|
||
;;
|
||
;; C. Locked by calling user and unchanged.
|
||
;;
|
||
;; D. Locked by the calling user and changed.
|
||
;;
|
||
;; E. Locked by someone other than the calling user.
|
||
;;
|
||
;; This makes for 25 states and 20 error conditions. Here's the matrix:
|
||
;;
|
||
;; VC's idea of state
|
||
;; |
|
||
;; V Actual state RCS action SCCS action Effect
|
||
;; A B C D E
|
||
;; A . 1 2 3 4 ci -u -t- admin -fb -i<file> initial admin
|
||
;; B 5 . 6 7 8 co -l get -e checkout
|
||
;; C 9 10 . 11 12 co -u unget; get revert
|
||
;; D 13 14 15 . 16 ci -u -m<comment> delta -y<comment>; get checkin
|
||
;; E 17 18 19 20 . rcs -u -M -l unget -n ; get -g steal lock
|
||
;;
|
||
;; All commands take the master file name as a last argument (not shown).
|
||
;;
|
||
;; In the discussion below, a "self-race" is a pathological situation in
|
||
;; which VC operations are being attempted simultaneously by two or more
|
||
;; Emacsen running under the same username.
|
||
;;
|
||
;; The vc-next-action code has the following windows:
|
||
;;
|
||
;; Window P:
|
||
;; Between the check for existence of a master file and the call to
|
||
;; admin/checkin in vc-buffer-admin (apparent state A). This window may
|
||
;; never close if the initial-comment feature is on.
|
||
;;
|
||
;; Window Q:
|
||
;; Between the call to vc-workfile-unchanged-p in and the immediately
|
||
;; following revert (apparent state C).
|
||
;;
|
||
;; Window R:
|
||
;; Between the call to vc-workfile-unchanged-p in and the following
|
||
;; checkin (apparent state D). This window may never close.
|
||
;;
|
||
;; Window S:
|
||
;; Between the unlock and the immediately following checkout during a
|
||
;; revert operation (apparent state C). Included in window Q.
|
||
;;
|
||
;; Window T:
|
||
;; Between vc-state and the following checkout (apparent state B).
|
||
;;
|
||
;; Window U:
|
||
;; Between vc-state and the following revert (apparent state C).
|
||
;; Includes windows Q and S.
|
||
;;
|
||
;; Window V:
|
||
;; Between vc-state and the following checkin (apparent state
|
||
;; D). This window may never be closed if the user fails to complete the
|
||
;; checkin message. Includes window R.
|
||
;;
|
||
;; Window W:
|
||
;; Between vc-state and the following steal-lock (apparent
|
||
;; state E). This window may never close if the user fails to complete
|
||
;; the steal-lock message. Includes window X.
|
||
;;
|
||
;; Window X:
|
||
;; Between the unlock and the immediately following re-lock during a
|
||
;; steal-lock operation (apparent state E). This window may never close
|
||
;; if the user fails to complete the steal-lock message.
|
||
;;
|
||
;; Errors:
|
||
;;
|
||
;; Apparent state A ---
|
||
;;
|
||
;; 1. File looked unregistered but is actually registered and not locked.
|
||
;;
|
||
;; Potential cause: someone else's admin during window P, with
|
||
;; caller's admin happening before their checkout.
|
||
;;
|
||
;; RCS: Prior to version 5.6.4, ci fails with message
|
||
;; "no lock set by <user>". From 5.6.4 onwards, VC uses the new
|
||
;; ci -i option and the message is "<file>,v: already exists".
|
||
;; SCCS: admin will fail with error (ad19).
|
||
;;
|
||
;; We can let these errors be passed up to the user.
|
||
;;
|
||
;; 2. File looked unregistered but is actually locked by caller, unchanged.
|
||
;;
|
||
;; Potential cause: self-race during window P.
|
||
;;
|
||
;; RCS: Prior to version 5.6.4, reverts the file to the last saved
|
||
;; version and unlocks it. From 5.6.4 onwards, VC uses the new
|
||
;; ci -i option, failing with message "<file>,v: already exists".
|
||
;; SCCS: will fail with error (ad19).
|
||
;;
|
||
;; Either of these consequences is acceptable.
|
||
;;
|
||
;; 3. File looked unregistered but is actually locked by caller, changed.
|
||
;;
|
||
;; Potential cause: self-race during window P.
|
||
;;
|
||
;; RCS: Prior to version 5.6.4, VC registers the caller's workfile as
|
||
;; a delta with a null change comment (the -t- switch will be
|
||
;; ignored). From 5.6.4 onwards, VC uses the new ci -i option,
|
||
;; failing with message "<file>,v: already exists".
|
||
;; SCCS: will fail with error (ad19).
|
||
;;
|
||
;; 4. File looked unregistered but is locked by someone else.
|
||
;;;
|
||
;; Potential cause: someone else's admin during window P, with
|
||
;; caller's admin happening *after* their checkout.
|
||
;;
|
||
;; RCS: Prior to version 5.6.4, ci fails with a
|
||
;; "no lock set by <user>" message. From 5.6.4 onwards,
|
||
;; VC uses the new ci -i option, failing with message
|
||
;; "<file>,v: already exists".
|
||
;; SCCS: will fail with error (ad19).
|
||
;;
|
||
;; We can let these errors be passed up to the user.
|
||
;;
|
||
;; Apparent state B ---
|
||
;;
|
||
;; 5. File looked registered and not locked, but is actually unregistered.
|
||
;;
|
||
;; Potential cause: master file got nuked during window P.
|
||
;;
|
||
;; RCS: will fail with "RCS/<file>: No such file or directory"
|
||
;; SCCS: will fail with error ut4.
|
||
;;
|
||
;; We can let these errors be passed up to the user.
|
||
;;
|
||
;; 6. File looked registered and not locked, but is actually locked by the
|
||
;; calling user and unchanged.
|
||
;;
|
||
;; Potential cause: self-race during window T.
|
||
;;
|
||
;; RCS: in the same directory as the previous workfile, co -l will fail
|
||
;; with "co error: writable foo exists; checkout aborted". In any other
|
||
;; directory, checkout will succeed.
|
||
;; SCCS: will fail with ge17.
|
||
;;
|
||
;; Either of these consequences is acceptable.
|
||
;;
|
||
;; 7. File looked registered and not locked, but is actually locked by the
|
||
;; calling user and changed.
|
||
;;
|
||
;; As case 6.
|
||
;;
|
||
;; 8. File looked registered and not locked, but is actually locked by another
|
||
;; user.
|
||
;;
|
||
;; Potential cause: someone else checks it out during window T.
|
||
;;
|
||
;; RCS: co error: revision 1.3 already locked by <user>
|
||
;; SCCS: fails with ge4 (in directory) or ut7 (outside it).
|
||
;;
|
||
;; We can let these errors be passed up to the user.
|
||
;;
|
||
;; Apparent state C ---
|
||
;;
|
||
;; 9. File looks locked by calling user and unchanged, but is unregistered.
|
||
;;
|
||
;; As case 5.
|
||
;;
|
||
;; 10. File looks locked by calling user and unchanged, but is actually not
|
||
;; locked.
|
||
;;
|
||
;; Potential cause: a self-race in window U, or by the revert's
|
||
;; landing during window X of some other user's steal-lock or window S
|
||
;; of another user's revert.
|
||
;;
|
||
;; RCS: succeeds, refreshing the file from the identical version in
|
||
;; the master.
|
||
;; SCCS: fails with error ut4 (p file nonexistent).
|
||
;;
|
||
;; Either of these consequences is acceptable.
|
||
;;
|
||
;; 11. File is locked by calling user. It looks unchanged, but is actually
|
||
;; changed.
|
||
;;
|
||
;; Potential cause: the file would have to be touched by a self-race
|
||
;; during window Q.
|
||
;;
|
||
;; The revert will succeed, removing whatever changes came with
|
||
;; the touch. It is theoretically possible that work could be lost.
|
||
;;
|
||
;; 12. File looks like it's locked by the calling user and unchanged, but
|
||
;; it's actually locked by someone else.
|
||
;;
|
||
;; Potential cause: a steal-lock in window V.
|
||
;;
|
||
;; RCS: co error: revision <rev> locked by <user>; use co -r or rcs -u
|
||
;; SCCS: fails with error un2
|
||
;;
|
||
;; We can pass these errors up to the user.
|
||
;;
|
||
;; Apparent state D ---
|
||
;;
|
||
;; 13. File looks like it's locked by the calling user and changed, but it's
|
||
;; actually unregistered.
|
||
;;
|
||
;; Potential cause: master file got nuked during window P.
|
||
;;
|
||
;; RCS: Prior to version 5.6.4, checks in the user's version as an
|
||
;; initial delta. From 5.6.4 onwards, VC uses the new ci -j
|
||
;; option, failing with message "no such file or directory".
|
||
;; SCCS: will fail with error ut4.
|
||
;;
|
||
;; This case is kind of nasty. Under RCS prior to version 5.6.4,
|
||
;; VC may fail to detect the loss of previous version information.
|
||
;;
|
||
;; 14. File looks like it's locked by the calling user and changed, but it's
|
||
;; actually unlocked.
|
||
;;
|
||
;; Potential cause: self-race in window V, or the checkin happening
|
||
;; during the window X of someone else's steal-lock or window S of
|
||
;; someone else's revert.
|
||
;;
|
||
;; RCS: ci will fail with "no lock set by <user>".
|
||
;; SCCS: delta will fail with error ut4.
|
||
;;
|
||
;; 15. File looks like it's locked by the calling user and changed, but it's
|
||
;; actually locked by the calling user and unchanged.
|
||
;;
|
||
;; Potential cause: another self-race --- a whole checkin/checkout
|
||
;; sequence by the calling user would have to land in window R.
|
||
;;
|
||
;; SCCS: checks in a redundant delta and leaves the file unlocked as usual.
|
||
;; RCS: reverts to the file state as of the second user's checkin, leaving
|
||
;; the file unlocked.
|
||
;;
|
||
;; It is theoretically possible that work could be lost under RCS.
|
||
;;
|
||
;; 16. File looks like it's locked by the calling user and changed, but it's
|
||
;; actually locked by a different user.
|
||
;;
|
||
;; RCS: ci error: no lock set by <user>
|
||
;; SCCS: unget will fail with error un2
|
||
;;
|
||
;; We can pass these errors up to the user.
|
||
;;
|
||
;; Apparent state E ---
|
||
;;
|
||
;; 17. File looks like it's locked by some other user, but it's actually
|
||
;; unregistered.
|
||
;;
|
||
;; As case 13.
|
||
;;
|
||
;; 18. File looks like it's locked by some other user, but it's actually
|
||
;; unlocked.
|
||
;;
|
||
;; Potential cause: someone released a lock during window W.
|
||
;;
|
||
;; RCS: The calling user will get the lock on the file.
|
||
;; SCCS: unget -n will fail with cm4.
|
||
;;
|
||
;; Either of these consequences will be OK.
|
||
;;
|
||
;; 19. File looks like it's locked by some other user, but it's actually
|
||
;; locked by the calling user and unchanged.
|
||
;;
|
||
;; Potential cause: the other user relinquishing a lock followed by
|
||
;; a self-race, both in window W.
|
||
;;
|
||
;; Under both RCS and SCCS, both unlock and lock will succeed, making
|
||
;; the sequence a no-op.
|
||
;;
|
||
;; 20. File looks like it's locked by some other user, but it's actually
|
||
;; locked by the calling user and changed.
|
||
;;
|
||
;; As case 19.
|
||
;;
|
||
;; PROBLEM CASES:
|
||
;;
|
||
;; In order of decreasing severity:
|
||
;;
|
||
;; Cases 11 and 15 are the only ones that potentially lose work.
|
||
;; They would require a self-race for this to happen.
|
||
;;
|
||
;; Case 13 in RCS loses information about previous deltas, retaining
|
||
;; only the information in the current workfile. This can only happen
|
||
;; if the master file gets nuked in window P.
|
||
;;
|
||
;; Case 3 in RCS and case 15 under SCCS insert a redundant delta with
|
||
;; no change comment in the master. This would require a self-race in
|
||
;; window P or R respectively.
|
||
;;
|
||
;; Cases 2, 10, 19 and 20 do extra work, but make no changes.
|
||
;;
|
||
;; Unfortunately, it appears to me that no recovery is possible in these
|
||
;; cases. They don't yield error messages, so there's no way to tell that
|
||
;; a race condition has occurred.
|
||
;;
|
||
;; All other cases don't change either the workfile or the master, and
|
||
;; trigger command errors which the user will see.
|
||
;;
|
||
;; Thus, there is no explicit recovery code.
|
||
|
||
;;; vc.el ends here
|