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610 lines
21 KiB
EmacsLisp
610 lines
21 KiB
EmacsLisp
;;; vc-hg.el --- VC backend for the mercurial version control system
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;; Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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;; Author: Ivan Kanis
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;; Keywords: tools
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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 3 of the License, or
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;; (at your option) 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. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This is a mercurial version control backend
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;;; Thanks:
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;;; Bugs:
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;;; Installation:
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;;; Todo:
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;; 1) Implement the rest of the vc interface. See the comment at the
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;; beginning of vc.el. The current status is:
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;; FUNCTION NAME STATUS
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;; BACKEND PROPERTIES
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;; * revision-granularity OK
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;; STATE-QUERYING FUNCTIONS
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;; * registered (file) OK
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;; * state (file) OK
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;; - state-heuristic (file) NOT NEEDED
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;; - dir-status (dir update-function) OK
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;; - dir-status-files (dir files ds uf) OK
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;; - dir-extra-headers (dir) OK
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;; - dir-printer (fileinfo) OK
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;; * working-revision (file) OK
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;; - latest-on-branch-p (file) ??
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;; * checkout-model (files) OK
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;; - workfile-unchanged-p (file) OK
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;; - mode-line-string (file) NOT NEEDED
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;; STATE-CHANGING FUNCTIONS
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;; * register (files &optional rev comment) OK
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;; * create-repo () OK
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;; - init-revision () NOT NEEDED
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;; - responsible-p (file) OK
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;; - could-register (file) OK
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;; - receive-file (file rev) ?? PROBABLY NOT NEEDED
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;; - unregister (file) COMMENTED OUT, MAY BE INCORRECT
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;; * checkin (files rev comment) OK
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;; * find-revision (file rev buffer) OK
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;; * checkout (file &optional editable rev) OK
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;; * revert (file &optional contents-done) OK
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;; - rollback (files) ?? PROBABLY NOT NEEDED
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;; - merge (file rev1 rev2) NEEDED
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;; - merge-news (file) NEEDED
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;; - steal-lock (file &optional revision) NOT NEEDED
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;; HISTORY FUNCTIONS
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;; * print-log (files &optional buffer) OK
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;; - log-view-mode () OK
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;; - show-log-entry (revision) NOT NEEDED, DEFAULT IS GOOD
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;; - comment-history (file) NOT NEEDED
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;; - update-changelog (files) NOT NEEDED
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;; * diff (files &optional rev1 rev2 buffer) OK
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;; - revision-completion-table (files) OK?
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;; - annotate-command (file buf &optional rev) OK
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;; - annotate-time () OK
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;; - annotate-current-time () NOT NEEDED
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;; - annotate-extract-revision-at-line () OK
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;; TAG SYSTEM
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;; - create-tag (dir name branchp) NEEDED
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;; - retrieve-tag (dir name update) NEEDED
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;; MISCELLANEOUS
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;; - make-version-backups-p (file) ??
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;; - repository-hostname (dirname) ??
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;; - previous-revision (file rev) OK
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;; - next-revision (file rev) OK
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;; - check-headers () ??
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;; - clear-headers () ??
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;; - delete-file (file) TEST IT
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;; - rename-file (old new) OK
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;; - find-file-hook () PROBABLY NOT NEEDED
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;; - find-file-not-found-hook () PROBABLY NOT NEEDED
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;; 2) Implement Stefan Monnier's advice:
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;; vc-hg-registered and vc-hg-state
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;; Both of those functions should be super extra careful to fail gracefully in
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;; unexpected circumstances. The reason this is important is that any error
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;; there will prevent the user from even looking at the file :-(
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;; Ideally, just like in vc-arch and vc-cvs, checking that the file is under
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;; mercurial's control and extracting the current revision should be done
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;; without even using `hg' (this way even if you don't have `hg' installed,
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;; Emacs is able to tell you this file is under mercurial's control).
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;;; History:
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;;
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;;; Code:
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(eval-when-compile
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(require 'cl)
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(require 'vc)
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(require 'vc-dir))
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;;; Customization options
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(defcustom vc-hg-global-switches nil
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"Global switches to pass to any Hg command."
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:type '(choice (const :tag "None" nil)
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(string :tag "Argument String")
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(repeat :tag "Argument List" :value ("") string))
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:version "22.2"
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:group 'vc)
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(defcustom vc-hg-diff-switches t ; Hg doesn't support common args like -u
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"String or list of strings specifying switches for Hg diff under VC.
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If nil, use the value of `vc-diff-switches'. If t, use no switches."
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:type '(choice (const :tag "Unspecified" nil)
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(const :tag "None" t)
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(string :tag "Argument String")
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(repeat :tag "Argument List" :value ("") string))
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:version "23.1"
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:group 'vc)
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;;; Properties of the backend
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(defun vc-hg-revision-granularity () 'repository)
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(defun vc-hg-checkout-model (files) 'implicit)
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;;; State querying functions
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;;;###autoload (defun vc-hg-registered (file)
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;;;###autoload "Return non-nil if FILE is registered with hg."
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;;;###autoload (if (vc-find-root file ".hg") ; short cut
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;;;###autoload (progn
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;;;###autoload (load "vc-hg")
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;;;###autoload (vc-hg-registered file))))
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;; Modeled after the similar function in vc-bzr.el
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(defun vc-hg-registered (file)
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"Return non-nil if FILE is registered with hg."
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(when (vc-hg-root file) ; short cut
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(let ((state (vc-hg-state file))) ; expensive
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(and state (not (memq state '(ignored unregistered)))))))
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(defun vc-hg-state (file)
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"Hg-specific version of `vc-state'."
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(let*
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((status nil)
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(out
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(with-output-to-string
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(with-current-buffer
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standard-output
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(setq status
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(condition-case nil
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;; Ignore all errors.
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(call-process
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"hg" nil t nil "--cwd" (file-name-directory file)
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"status" "-A" (file-name-nondirectory file))
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;; Some problem happened. E.g. We can't find an `hg'
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;; executable.
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(error nil)))))))
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(when (eq 0 status)
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(when (null (string-match ".*: No such file or directory$" out))
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(let ((state (aref out 0)))
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(cond
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((eq state ?=) 'up-to-date)
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((eq state ?A) 'added)
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((eq state ?M) 'edited)
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((eq state ?I) 'ignored)
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((eq state ?R) 'removed)
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((eq state ?!) 'missing)
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((eq state ??) 'unregistered)
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((eq state ?C) 'up-to-date) ;; Older mercurials use this
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(t 'up-to-date)))))))
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(defun vc-hg-working-revision (file)
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"Hg-specific version of `vc-working-revision'."
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(let*
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((status nil)
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(out
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(with-output-to-string
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(with-current-buffer
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standard-output
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(setq status
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(condition-case nil
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;; Ignore all errors.
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(call-process
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"hg" nil t nil "--cwd" (file-name-directory file)
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"log" "-l1" (file-name-nondirectory file))
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;; Some problem happened. E.g. We can't find an `hg'
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;; executable.
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(error nil)))))))
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(when (eq 0 status)
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(if (string-match "changeset: *\\([0-9]*\\)" out)
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(match-string 1 out)
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"0"))))
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;;; History functions
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(defun vc-hg-print-log (files &optional buffer)
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"Get change log associated with FILES."
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;; `log-view-mode' needs to have the file names in order to function
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;; correctly. "hg log" does not print it, so we insert it here by
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;; hand.
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;; `vc-do-command' creates the buffer, but we need it before running
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;; the command.
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(vc-setup-buffer buffer)
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;; If the buffer exists from a previous invocation it might be
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;; read-only.
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(let ((inhibit-read-only t))
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(with-current-buffer
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buffer
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(vc-hg-command buffer 0 files "log"))))
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(defvar log-view-message-re)
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(defvar log-view-file-re)
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(defvar log-view-font-lock-keywords)
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(defvar log-view-per-file-logs)
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(define-derived-mode vc-hg-log-view-mode log-view-mode "Hg-Log-View"
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(require 'add-log) ;; we need the add-log faces
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(set (make-local-variable 'log-view-file-re) "\\`a\\`")
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(set (make-local-variable 'log-view-per-file-logs) nil)
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(set (make-local-variable 'log-view-message-re)
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"^changeset:[ \t]*\\([0-9]+\\):\\(.+\\)")
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(set (make-local-variable 'log-view-font-lock-keywords)
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(append
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log-view-font-lock-keywords
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'(
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;; Handle the case:
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;; user: FirstName LastName <foo@bar>
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("^user:[ \t]+\\([^<(]+?\\)[ \t]*[(<]\\([A-Za-z0-9_.+-]+@[A-Za-z0-9_.-]+\\)[>)]"
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(1 'change-log-name)
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(2 'change-log-email))
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;; Handle the cases:
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;; user: foo@bar
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;; and
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;; user: foo
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("^user:[ \t]+\\([A-Za-z0-9_.+-]+\\(?:@[A-Za-z0-9_.-]+\\)?\\)"
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(1 'change-log-email))
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("^date: \\(.+\\)" (1 'change-log-date))
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("^summary:[ \t]+\\(.+\\)" (1 'log-view-message))))))
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(defun vc-hg-diff (files &optional oldvers newvers buffer)
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"Get a difference report using hg between two revisions of FILES."
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(let* ((firstfile (car files))
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(cwd (if firstfile (file-name-directory firstfile)
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(expand-file-name default-directory)))
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(working (and firstfile (vc-working-revision firstfile))))
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(when (and (equal oldvers working) (not newvers))
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(setq oldvers nil))
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(when (and (not oldvers) newvers)
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(setq oldvers working))
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(apply #'vc-hg-command (or buffer "*vc-diff*") nil
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(mapcar (lambda (file) (file-relative-name file cwd)) files)
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"--cwd" cwd
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"diff"
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(append
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(vc-switches 'hg 'diff)
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(when oldvers
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(if newvers
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(list "-r" oldvers "-r" newvers)
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(list "-r" oldvers)))))))
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(defun vc-hg-revision-table (files)
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(let ((default-directory (file-name-directory (car files))))
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(with-temp-buffer
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(vc-hg-command t nil files "log" "--template" "{rev} ")
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(split-string
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(buffer-substring-no-properties (point-min) (point-max))))))
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;; Modeled after the similar function in vc-cvs.el
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(defun vc-hg-revision-completion-table (files)
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(lexical-let ((files files)
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table)
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(setq table (lazy-completion-table
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table (lambda () (vc-hg-revision-table files))))
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table))
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(defun vc-hg-annotate-command (file buffer &optional revision)
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"Execute \"hg annotate\" on FILE, inserting the contents in BUFFER.
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Optional arg REVISION is a revision to annotate from."
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(vc-hg-command buffer 0 file "annotate" "-d" "-n"
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(when revision (concat "-r" revision)))
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(with-current-buffer buffer
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(goto-char (point-min))
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(re-search-forward "^[ \t]*[0-9]")
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(delete-region (point-min) (match-beginning 0))))
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(declare-function vc-annotate-convert-time "vc-annotate" (time))
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;; The format for one line output by "hg annotate -d -n" looks like this:
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;;215 Wed Jun 20 21:22:58 2007 -0700: CONTENTS
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;; i.e: VERSION_NUMBER DATE: CONTENTS
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;; If the user has set the "--follow" option, the output looks like:
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;;215 Wed Jun 20 21:22:58 2007 -0700 foo.c: CONTENTS
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;; i.e. VERSION_NUMBER DATE FILENAME: CONTENTS
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(defconst vc-hg-annotate-re
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"^[ \t]*\\([0-9]+\\) \\(.\\{30\\}\\)[^:\n]*\\(:[^ \n][^:\n]*\\)*: ")
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(defun vc-hg-annotate-time ()
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(when (looking-at vc-hg-annotate-re)
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(goto-char (match-end 0))
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(vc-annotate-convert-time
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(date-to-time (match-string-no-properties 2)))))
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(defun vc-hg-annotate-extract-revision-at-line ()
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(save-excursion
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(beginning-of-line)
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(when (looking-at vc-hg-annotate-re) (match-string-no-properties 1))))
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(defun vc-hg-previous-revision (file rev)
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(let ((newrev (1- (string-to-number rev))))
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(when (>= newrev 0)
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(number-to-string newrev))))
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(defun vc-hg-next-revision (file rev)
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(let ((newrev (1+ (string-to-number rev)))
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(tip-revision
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(with-temp-buffer
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(vc-hg-command t 0 nil "tip")
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(goto-char (point-min))
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(re-search-forward "^changeset:[ \t]*\\([0-9]+\\):")
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(string-to-number (match-string-no-properties 1)))))
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;; We don't want to exceed the maximum possible revision number, ie
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;; the tip revision.
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(when (<= newrev tip-revision)
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(number-to-string newrev))))
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;; Modeled after the similar function in vc-bzr.el
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(defun vc-hg-delete-file (file)
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"Delete FILE and delete it in the hg repository."
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(condition-case ()
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(delete-file file)
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(file-error nil))
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(vc-hg-command nil 0 file "remove" "--after" "--force"))
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;; Modeled after the similar function in vc-bzr.el
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(defun vc-hg-rename-file (old new)
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"Rename file from OLD to NEW using `hg mv'."
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(vc-hg-command nil 0 new "mv" old))
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(defun vc-hg-register (files &optional rev comment)
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"Register FILES under hg.
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REV is ignored.
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COMMENT is ignored."
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(vc-hg-command nil 0 files "add"))
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(defun vc-hg-create-repo ()
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"Create a new Mercurial repository."
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(vc-hg-command nil 0 nil "init"))
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(defalias 'vc-hg-responsible-p 'vc-hg-root)
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;; Modeled after the similar function in vc-bzr.el
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(defun vc-hg-could-register (file)
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"Return non-nil if FILE could be registered under hg."
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(and (vc-hg-responsible-p file) ; shortcut
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(condition-case ()
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(with-temp-buffer
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(vc-hg-command t nil file "add" "--dry-run"))
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;; The command succeeds with no output if file is
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;; registered.
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(error))))
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;; FIXME: This would remove the file. Is that correct?
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;; (defun vc-hg-unregister (file)
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;; "Unregister FILE from hg."
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;; (vc-hg-command nil nil file "remove"))
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(defun vc-hg-checkin (files rev comment)
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"Hg-specific version of `vc-backend-checkin'.
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REV is ignored."
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(vc-hg-command nil 0 files "commit" "-m" comment))
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(defun vc-hg-find-revision (file rev buffer)
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(let ((coding-system-for-read 'binary)
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(coding-system-for-write 'binary))
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(if rev
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(vc-hg-command buffer 0 file "cat" "-r" rev)
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(vc-hg-command buffer 0 file "cat"))))
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;; Modeled after the similar function in vc-bzr.el
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(defun vc-hg-checkout (file &optional editable rev)
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"Retrieve a revision of FILE.
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EDITABLE is ignored.
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REV is the revision to check out into WORKFILE."
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(let ((coding-system-for-read 'binary)
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(coding-system-for-write 'binary))
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(with-current-buffer (or (get-file-buffer file) (current-buffer))
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(if rev
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(vc-hg-command t 0 file "cat" "-r" rev)
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(vc-hg-command t 0 file "cat")))))
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;; Modeled after the similar function in vc-bzr.el
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(defun vc-hg-workfile-unchanged-p (file)
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(eq 'up-to-date (vc-hg-state file)))
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;; Modeled after the similar function in vc-bzr.el
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(defun vc-hg-revert (file &optional contents-done)
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(unless contents-done
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(with-temp-buffer (vc-hg-command t 0 file "revert"))))
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;;; Hg specific functionality.
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(defvar vc-hg-extra-menu-map
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(let ((map (make-sparse-keymap)))
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(define-key map [incoming] '(menu-item "Show incoming" vc-hg-incoming))
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(define-key map [outgoing] '(menu-item "Show outgoing" vc-hg-outgoing))
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map))
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(defun vc-hg-extra-menu () vc-hg-extra-menu-map)
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(defun vc-hg-extra-status-menu () vc-hg-extra-menu-map)
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(define-derived-mode vc-hg-outgoing-mode vc-hg-log-view-mode "Hg-Outgoing")
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(define-derived-mode vc-hg-incoming-mode vc-hg-log-view-mode "Hg-Incoming")
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(defstruct (vc-hg-extra-fileinfo
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(:copier nil)
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(:constructor vc-hg-create-extra-fileinfo (rename-state extra-name))
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(:conc-name vc-hg-extra-fileinfo->))
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rename-state ;; rename or copy state
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extra-name) ;; original name for copies and rename targets, new name for
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(declare-function vc-default-dir-printer "vc-dir" (backend fileentry))
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(defun vc-hg-dir-printer (info)
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"Pretty-printer for the vc-dir-fileinfo structure."
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(let ((extra (vc-dir-fileinfo->extra info)))
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(vc-default-dir-printer 'Hg info)
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(when extra
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(insert (propertize
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(format " (%s %s)"
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(case (vc-hg-extra-fileinfo->rename-state extra)
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('copied "copied from")
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('renamed-from "renamed from")
|
||
('renamed-to "renamed to"))
|
||
(vc-hg-extra-fileinfo->extra-name extra))
|
||
'face 'font-lock-comment-face)))))
|
||
|
||
(defun vc-hg-after-dir-status (update-function)
|
||
(let ((status-char nil)
|
||
(file nil)
|
||
(translation '((?= . up-to-date)
|
||
(?C . up-to-date)
|
||
(?A . added)
|
||
(?R . removed)
|
||
(?M . edited)
|
||
(?I . ignored)
|
||
(?! . missing)
|
||
(? . copy-rename-line)
|
||
(?? . unregistered)))
|
||
(translated nil)
|
||
(result nil)
|
||
(last-added nil)
|
||
(last-line-copy nil))
|
||
(goto-char (point-min))
|
||
(while (not (eobp))
|
||
(setq translated (cdr (assoc (char-after) translation)))
|
||
(setq file
|
||
(buffer-substring-no-properties (+ (point) 2)
|
||
(line-end-position)))
|
||
(cond ((not translated)
|
||
(setq last-line-copy nil))
|
||
((eq translated 'up-to-date)
|
||
(setq last-line-copy nil))
|
||
((eq translated 'copy-rename-line)
|
||
;; For copied files the output looks like this:
|
||
;; A COPIED_FILE_NAME
|
||
;; ORIGINAL_FILE_NAME
|
||
(setf (nth 2 last-added)
|
||
(vc-hg-create-extra-fileinfo 'copied file))
|
||
(setq last-line-copy t))
|
||
((and last-line-copy (eq translated 'removed))
|
||
;; For renamed files the output looks like this:
|
||
;; A NEW_FILE_NAME
|
||
;; ORIGINAL_FILE_NAME
|
||
;; R ORIGINAL_FILE_NAME
|
||
;; We need to adjust the previous entry to not think it is a copy.
|
||
(setf (vc-hg-extra-fileinfo->rename-state (nth 2 last-added))
|
||
'renamed-from)
|
||
(push (list file translated
|
||
(vc-hg-create-extra-fileinfo
|
||
'renamed-to (nth 0 last-added))) result)
|
||
(setq last-line-copy nil))
|
||
(t
|
||
(setq last-added (list file translated nil))
|
||
(push last-added result)
|
||
(setq last-line-copy nil)))
|
||
(forward-line))
|
||
(funcall update-function result)))
|
||
|
||
(defun vc-hg-dir-status (dir update-function)
|
||
(vc-hg-command (current-buffer) 'async dir "status" "-C")
|
||
(vc-exec-after
|
||
`(vc-hg-after-dir-status (quote ,update-function))))
|
||
|
||
(defun vc-hg-dir-status-files (dir files default-state update-function)
|
||
(apply 'vc-hg-command (current-buffer) 'async dir "status" "-C" files)
|
||
(vc-exec-after
|
||
`(vc-hg-after-dir-status (quote ,update-function))))
|
||
|
||
(defun vc-hg-dir-extra-header (name &rest commands)
|
||
(concat (propertize name 'face 'font-lock-type-face)
|
||
(propertize
|
||
(with-temp-buffer
|
||
(apply 'vc-hg-command (current-buffer) 0 nil commands)
|
||
(buffer-substring-no-properties (point-min) (1- (point-max))))
|
||
'face 'font-lock-variable-name-face)))
|
||
|
||
(defun vc-hg-dir-extra-headers (dir)
|
||
"Generate extra status headers for a Mercurial tree."
|
||
(let ((default-directory dir))
|
||
(concat
|
||
(vc-hg-dir-extra-header "Root : " "root") "\n"
|
||
(vc-hg-dir-extra-header "Branch : " "id" "-b") "\n"
|
||
(vc-hg-dir-extra-header "Tags : " "id" "-t") ; "\n"
|
||
;; these change after each commit
|
||
;; (vc-hg-dir-extra-header "Local num : " "id" "-n") "\n"
|
||
;; (vc-hg-dir-extra-header "Global id : " "id" "-i")
|
||
)))
|
||
|
||
;; FIXME: this adds another top level menu, instead figure out how to
|
||
;; replace the Log-View menu.
|
||
(easy-menu-define log-view-mode-menu vc-hg-outgoing-mode-map
|
||
"Hg-outgoing Display Menu"
|
||
`("Hg-outgoing"
|
||
["Push selected" vc-hg-push]))
|
||
|
||
(easy-menu-define log-view-mode-menu vc-hg-incoming-mode-map
|
||
"Hg-incoming Display Menu"
|
||
`("Hg-incoming"
|
||
["Pull selected" vc-hg-pull]))
|
||
|
||
(defun vc-hg-outgoing ()
|
||
(interactive)
|
||
(let ((bname "*Hg outgoing*"))
|
||
(vc-hg-command bname 0 nil "outgoing" "-n")
|
||
(pop-to-buffer bname)
|
||
(vc-hg-outgoing-mode)))
|
||
|
||
(defun vc-hg-incoming ()
|
||
(interactive)
|
||
(let ((bname "*Hg incoming*"))
|
||
(vc-hg-command bname 0 nil "incoming" "-n")
|
||
(pop-to-buffer bname)
|
||
(vc-hg-incoming-mode)))
|
||
|
||
(declare-function log-view-get-marked "log-view" ())
|
||
|
||
;; XXX maybe also add key bindings for these functions.
|
||
(defun vc-hg-push ()
|
||
(interactive)
|
||
(let ((marked-list (log-view-get-marked)))
|
||
(if marked-list
|
||
(vc-hg-command
|
||
nil 0 nil
|
||
(cons "push"
|
||
(apply 'nconc
|
||
(mapcar (lambda (arg) (list "-r" arg)) marked-list))))
|
||
(error "No log entries selected for push"))))
|
||
|
||
(defun vc-hg-pull ()
|
||
(interactive)
|
||
(let ((marked-list (log-view-get-marked)))
|
||
(if marked-list
|
||
(vc-hg-command
|
||
nil 0 nil
|
||
(cons "pull"
|
||
(apply 'nconc
|
||
(mapcar (lambda (arg) (list "-r" arg)) marked-list))))
|
||
(error "No log entries selected for pull"))))
|
||
|
||
;;; Internal functions
|
||
|
||
(defun vc-hg-command (buffer okstatus file-or-list &rest flags)
|
||
"A wrapper around `vc-do-command' for use in vc-hg.el.
|
||
The difference to vc-do-command is that this function always invokes `hg',
|
||
and that it passes `vc-hg-global-switches' to it before FLAGS."
|
||
(apply 'vc-do-command (or buffer "*vc*") okstatus "hg" file-or-list
|
||
(if (stringp vc-hg-global-switches)
|
||
(cons vc-hg-global-switches flags)
|
||
(append vc-hg-global-switches
|
||
flags))))
|
||
|
||
(defun vc-hg-root (file)
|
||
(vc-find-root file ".hg"))
|
||
|
||
(provide 'vc-hg)
|
||
|
||
;; arch-tag: bd094dc5-715a-434f-a331-37b9fb7cd954
|
||
;;; vc-hg.el ends here
|