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631 lines
22 KiB
EmacsLisp
631 lines
22 KiB
EmacsLisp
;;; lisp-mnt.el --- utility functions for Emacs Lisp maintainers
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;; Copyright (C) 1992, 1994, 1997, 2000-2018 Free Software Foundation,
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;; Inc.
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;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
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;; Maintainer: emacs-devel@gnu.org
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;; Created: 14 Jul 1992
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;; Keywords: docs
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;; X-Bogus-Bureaucratic-Cruft: Gruad will get you if you don't watch out!
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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 <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This library adds some services to Emacs-Lisp editing mode.
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;;
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;; First, it knows about the header conventions for library packages.
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;; One entry point supports generating synopses from a library directory.
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;; Another can be used to check for missing headers in library files.
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;;
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;; Another entry point automatically addresses bug mail to a package's
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;; maintainer or author.
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;; This file can be loaded by your emacs-lisp-mode-hook. Have it
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;; (require 'lisp-mnt)
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;; This file is an example of the header conventions. Note the following
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;; features:
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;;
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;; * Header line --- makes it possible to extract a one-line summary of
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;; the package's uses automatically for use in library synopses, KWIC
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;; indexes and the like.
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;;
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;; Format is three semicolons, followed by the filename, followed by
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;; three dashes, followed by the summary. All fields space-separated.
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;;
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;; * A blank line
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;;
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;; * Copyright line, which looks more or less like this:
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;;
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;; ;; Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
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;;
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;; * A blank line
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;;
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;; * Author line --- contains the name and net address of at least
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;; the principal author.
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;;
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;; If there are multiple authors, they should be listed on continuation
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;; lines led by ;;<TAB>, like this:
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;;
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;; ;; Author: Ashwin Ram <Ram-Ashwin@cs.yale.edu>
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;; ;; Dave Sill <de5@ornl.gov>
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;; ;; David Lawrence <tale@pawl.rpi.edu>
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;; ;; Noah Friedman <friedman@ai.mit.edu>
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;; ;; Joe Wells <jbw@maverick.uswest.com>
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;; ;; Dave Brennan <brennan@hal.com>
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;; ;; Eric Raymond <esr@snark.thyrsus.com>
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;;
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;; * Maintainer line --- should be a single name/address as in the Author
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;; line, or an address only. If there is no maintainer
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;; line, the person(s) in the Author field are presumed to be it.
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;; The idea behind these two fields is to be able to write a Lisp function
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;; that does "send mail to the author" without having to mine the name out by
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;; hand. Please be careful about surrounding the network address with <> if
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;; there's also a name in the field.
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;;
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;; * Created line --- optional, gives the original creation date of the
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;; file. For historical interest, basically.
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;;
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;; * Version line --- intended to give the reader a clue if they're looking
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;; at a different version of the file than the one they're accustomed to. This
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;; may be an RCS or SCCS header.
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;;
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;; * Adapted-By line --- this was used historically when some files
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;; were added to Emacs. The person named in this field installed and
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;; (possibly adapted) the package in the Emacs distribution.
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;;
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;; * Keywords line --- used by the finder code for finding Emacs
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;; Lisp code related to a topic.
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;;
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;; * X-Bogus-Bureaucratic-Cruft line --- this is a joke and an example
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;; of a comment header. Headers starting with `X-' should never be used
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;; for any real purpose; this is the way to safely add random headers
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;; without invoking the wrath of any program.
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;;
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;; * Commentary line --- enables Lisp code to find the developer's and
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;; maintainers' explanations of the package internals.
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;;
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;; * Change log line --- optional, exists to terminate the commentary
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;; section and start a change-log part, if one exists.
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;;
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;; * Code line --- exists so Lisp can know where commentary and/or
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;; change-log sections end.
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;;
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;; * Footer line --- marks end-of-file so it can be distinguished from
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;; an expanded formfeed or the results of truncation.
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;;; Change Log:
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;; Tue Jul 14 23:44:17 1992 ESR
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;; * Created.
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;;; Code:
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;;; Variables:
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(defgroup lisp-mnt nil
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"Utility functions for Emacs Lisp maintainers."
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:prefix "lm-"
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:group 'maint)
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;; At least some of these defcustoms should probably be defconsts,
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;; since they define, or are defined by, the header format. -- fx
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(defcustom lm-header-prefix "^;+[ \t]+\\(@(#)\\)?[ \t]*\\$?"
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"Prefix that is ignored before the tag.
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For example, you can write the 1st line synopsis string and headers like this
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in your Lisp package:
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;; @(#) package.el -- package description
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;;
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;; @(#) $Maintainer: Person Foo Bar $
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The @(#) construct is used by unix what(1) and
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then $identifier: doc string $ is used by GNU ident(1)"
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:type 'regexp
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:group 'lisp-mnt)
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(defcustom lm-copyright-prefix "^\\(;+[ \t]\\)+Copyright (C) "
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"Prefix that is ignored before the dates in a copyright.
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Leading comment characters and whitespace should be in regexp group 1."
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:type 'regexp
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:group 'lisp-mnt)
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(defcustom lm-comment-column 16
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"Column used for placing formatted output."
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:type 'integer
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:group 'lisp-mnt)
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(defcustom lm-any-header ".*"
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"Regexp which matches start of any section."
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:type 'regexp
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:group 'lisp-mnt)
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(defcustom lm-commentary-header "Commentary\\|Documentation"
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"Regexp which matches start of documentation section."
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:type 'regexp
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:group 'lisp-mnt)
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(defcustom lm-history-header "Change ?Log\\|History"
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"Regexp which matches the start of code log section."
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:type 'regexp
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:group 'lisp-mnt)
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;;; Functions:
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;; These functions all parse the headers of the current buffer
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(defun lm-get-header-re (header &optional mode)
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"Return regexp for matching HEADER.
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If called with optional MODE and with value `section',
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return section regexp instead."
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(if (eq mode 'section)
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(concat "^;;;;* \\(" header "\\):[ \t]*$")
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(concat lm-header-prefix "\\(" header "\\)[ \t]*:[ \t]*")))
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(defun lm-get-package-name ()
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"Return package name by looking at the first line."
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(save-excursion
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(goto-char (point-min))
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(if (and (looking-at (concat lm-header-prefix))
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(progn (goto-char (match-end 0))
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(looking-at "\\([^\t ]+\\)")
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(match-end 1)))
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(match-string-no-properties 1))))
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(defun lm-section-start (header &optional after)
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"Return the buffer location of a given section start marker.
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The HEADER is the section mark string to search for.
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If AFTER is non-nil, return the location of the next line.
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If the given section does not exist, return nil."
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(save-excursion
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(let ((case-fold-search t))
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(goto-char (point-min))
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(if (re-search-forward (lm-get-header-re header 'section) nil t)
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(line-beginning-position (if after 2))))))
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(defalias 'lm-section-mark 'lm-section-start)
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(defun lm-section-end (header)
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"Return the buffer location of the end of a given section.
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The HEADER is the section string marking the beginning of the
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section. If the given section does not exist, return nil.
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The section ends before the first non-comment text or the next
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section of the same level or lower; whatever comes first. The
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function `lisp-outline-level' is used to compute the level of
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a section."
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(require 'outline) ;; for outline-regexp.
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(let ((start (lm-section-start header)))
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(when start
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(save-excursion
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(goto-char start)
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(let ((level (lisp-outline-level))
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(case-fold-search t)
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next-section-found)
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(beginning-of-line 2)
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(while (and (setq next-section-found
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(re-search-forward
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(lm-get-header-re lm-any-header 'section)
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nil t))
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(> (save-excursion
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(beginning-of-line)
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(lisp-outline-level))
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level)))
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(min (if next-section-found
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(progn (beginning-of-line 0)
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(unless (looking-at " ")
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(beginning-of-line 2))
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(point))
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(point-max))
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(progn (goto-char start)
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(while (forward-comment 1))
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(point))))))))
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(defsubst lm-code-start ()
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"Return the buffer location of the `Code' start marker."
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(lm-section-start "Code"))
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(defalias 'lm-code-mark 'lm-code-start)
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(defsubst lm-commentary-start ()
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"Return the buffer location of the `Commentary' start marker."
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(lm-section-start lm-commentary-header))
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(defalias 'lm-commentary-mark 'lm-commentary-start)
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(defsubst lm-commentary-end ()
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"Return the buffer location of the `Commentary' section end."
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(lm-section-end lm-commentary-header))
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(defsubst lm-history-start ()
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"Return the buffer location of the `History' start marker."
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(lm-section-start lm-history-header))
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(defalias 'lm-history-mark 'lm-history-start)
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(defsubst lm-copyright-mark ()
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"Return the buffer location of the `Copyright' line."
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(save-excursion
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(let ((case-fold-search t))
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(goto-char (point-min))
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(if (re-search-forward lm-copyright-prefix nil t)
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(point)))))
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(defun lm-header (header)
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"Return the contents of the header named HEADER."
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(goto-char (point-min))
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(let ((case-fold-search t))
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(when (and (re-search-forward (lm-get-header-re header) (lm-code-mark) t)
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;; RCS ident likes format "$identifier: data$"
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(looking-at
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(if (save-excursion
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(skip-chars-backward "^$" (match-beginning 0))
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(= (point) (match-beginning 0)))
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"[^\n]+" "[^$\n]+")))
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(match-string-no-properties 0))))
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(defun lm-header-multiline (header)
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"Return the contents of the header named HEADER, with continuation lines.
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The returned value is a list of strings, one per line."
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(save-excursion
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(goto-char (point-min))
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(let ((res (lm-header header)))
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(when res
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(setq res (list res))
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(forward-line 1)
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(while (looking-at "^;+\\(\t\\|[\t\s]\\{2,\\}\\)\\(.+\\)")
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(push (match-string-no-properties 2) res)
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(forward-line 1)))
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(nreverse res))))
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;; These give us smart access to the header fields and commentary
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(defmacro lm-with-file (file &rest body)
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"Execute BODY in a buffer containing the contents of FILE.
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If FILE is nil, execute BODY in the current buffer."
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(declare (indent 1) (debug t))
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(let ((filesym (make-symbol "file")))
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`(let ((,filesym ,file))
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(if ,filesym
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(with-temp-buffer
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(insert-file-contents ,filesym)
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(emacs-lisp-mode)
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,@body)
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(save-excursion
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(save-restriction
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(widen)
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(goto-char (point-min))
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;; Switching major modes is too drastic, so just switch
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;; temporarily to the Emacs Lisp mode syntax table.
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(with-syntax-table emacs-lisp-mode-syntax-table
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,@body)))))))
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;; Fixme: Probably this should be amalgamated with copyright.el; also
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;; we need a check for ranges in copyright years.
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(defun lm-crack-copyright (&optional file)
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"Return the copyright holder, and a list of copyright years.
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Use the current buffer if FILE is nil.
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Return argument is of the form (\"HOLDER\" \"YEAR1\" ... \"YEARN\")"
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(lm-with-file file
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(goto-char (lm-copyright-mark))
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(let ((holder nil)
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(years nil)
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(start (point))
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(end (line-end-position)))
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;; Cope with multi-line copyright `lines'. Assume the second
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;; line is indented at least as much as the original, with the
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;; same commenting style.
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(save-excursion
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(beginning-of-line 2)
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(let ((str (match-string-no-properties 1)))
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(beginning-of-line)
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(while (and (looking-at str) (not (looking-at lm-copyright-prefix)))
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(setq end (line-end-position))
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(beginning-of-line 2))))
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;; Make a single line and parse that.
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(let ((buff (current-buffer)))
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(with-temp-buffer
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(insert-buffer-substring buff start end)
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(goto-char (point-min))
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(while (re-search-forward "^;+[ \t]+" nil t)
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(replace-match ""))
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(goto-char (point-min))
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(while (re-search-forward " *\n" nil t)
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(replace-match " "))
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(goto-char (point-min))
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(while (re-search-forward "\\([0-9]+\\),? +" nil t)
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(setq years (cons (match-string-no-properties 1) years)))
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(if (looking-at ".*$")
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(setq holder (match-string-no-properties 0)))))
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(cons holder (nreverse years)))))
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(defun lm-summary (&optional file)
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"Return the one-line summary of file FILE, or current buffer if FILE is nil."
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(lm-with-file file
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(goto-char (point-min))
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(if (and (looking-at lm-header-prefix)
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(progn (goto-char (match-end 0))
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(looking-at "[^ ]+[ \t]+--+[ \t]+\\(.*\\)")))
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(let ((summary (match-string-no-properties 1)))
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;; Strip off -*- specifications.
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(if (string-match "[ \t]*-\\*-.*-\\*-" summary)
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(substring summary 0 (match-beginning 0))
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summary)))))
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(defun lm-crack-address (x)
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"Split up an email address X into full name and real email address.
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The value is a cons of the form (FULLNAME . ADDRESS)."
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(cond ((string-match "\\(.+\\) [(<]\\(\\S-+@\\S-+\\)[>)]" x)
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(cons (match-string 1 x)
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(match-string 2 x)))
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((string-match "\\(\\S-+@\\S-+\\) [(<]\\(.*\\)[>)]" x)
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(cons (match-string 2 x)
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(match-string 1 x)))
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((string-match "\\S-+@\\S-+" x)
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(cons nil x))
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(t
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(cons x nil))))
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(defun lm-authors (&optional file)
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"Return the author list of file FILE, or current buffer if FILE is nil.
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Each element of the list is a cons; the car is the full name,
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the cdr is an email address."
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(lm-with-file file
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(let ((authorlist (lm-header-multiline "author")))
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(mapcar 'lm-crack-address authorlist))))
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|
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(defun lm-maintainer (&optional file)
|
||
"Return the maintainer of file FILE, or current buffer if FILE is nil.
|
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The return value has the form (NAME . ADDRESS)."
|
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(lm-with-file file
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(let ((maint (lm-header "maintainer")))
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(if maint
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(lm-crack-address maint)
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(car (lm-authors))))))
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(defun lm-creation-date (&optional file)
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"Return the created date given in file FILE, or current buffer if FILE is nil."
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(lm-with-file file
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(lm-header "created")))
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(defun lm-last-modified-date (&optional file iso-date)
|
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"Return the modify-date given in file FILE, or current buffer if FILE is nil.
|
||
ISO-DATE non-nil means return the date in ISO 8601 format."
|
||
(lm-with-file file
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||
(when (progn (goto-char (point-min))
|
||
(re-search-forward
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||
"\\$[I]d: [^ ]+ [^ ]+ \\([^/]+\\)/\\([^/]+\\)/\\([^ ]+\\) "
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||
(lm-code-mark) t))
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||
(let ((dd (match-string 3))
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(mm (match-string 2))
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(yyyy (match-string 1)))
|
||
(if iso-date
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||
(format "%s-%s-%s" yyyy mm dd)
|
||
(format "%s %s %s"
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||
dd
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||
(nth (string-to-number mm)
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||
'("" "Jan" "Feb" "Mar" "Apr" "May" "Jun"
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||
"Jul" "Aug" "Sep" "Oct" "Nov" "Dec"))
|
||
yyyy))))))
|
||
|
||
(defun lm-version (&optional file)
|
||
"Return the version listed in file FILE, or current buffer if FILE is nil.
|
||
This can be found in an RCS or SCCS header."
|
||
(lm-with-file file
|
||
(or (lm-header "version")
|
||
(let ((header-max (lm-code-mark)))
|
||
(goto-char (point-min))
|
||
(cond
|
||
;; Look for an RCS header
|
||
((re-search-forward "\\$[I]d: [^ ]+ \\([^ ]+\\) " header-max t)
|
||
(match-string-no-properties 1))
|
||
((re-search-forward "\\$Revision: +\\([^ ]+\\) " header-max t)
|
||
(match-string-no-properties 1))
|
||
;; Look for an SCCS header
|
||
((re-search-forward
|
||
(concat
|
||
"@(#)"
|
||
(if buffer-file-name
|
||
(regexp-quote (file-name-nondirectory buffer-file-name))
|
||
"[^\t\n]+")
|
||
"\t\\([012345679.]*\\)")
|
||
header-max t)
|
||
(match-string-no-properties 1)))))))
|
||
|
||
(defun lm-keywords (&optional file)
|
||
"Return the keywords given in file FILE, or current buffer if FILE is nil.
|
||
The return is a `downcase'-ed string, or nil if no keywords
|
||
header. Multi-line keywords are joined up with a space between
|
||
each line."
|
||
(lm-with-file file
|
||
(let ((keywords (lm-header-multiline "keywords")))
|
||
(and keywords
|
||
(mapconcat 'downcase keywords " ")))))
|
||
|
||
(defun lm-keywords-list (&optional file)
|
||
"Return list of keywords given in file FILE."
|
||
(let ((keywords (lm-keywords file)))
|
||
(if keywords
|
||
(if (string-match-p "," keywords)
|
||
(split-string keywords ",[ \t\n]*" t "[ ]+")
|
||
(split-string keywords "[ \t\n]+" t "[ ]+")))))
|
||
|
||
(defvar finder-known-keywords)
|
||
(defun lm-keywords-finder-p (&optional file)
|
||
"Return non-nil if any keywords in FILE are known to finder."
|
||
(require 'finder)
|
||
(let ((keys (lm-keywords-list file)))
|
||
(catch 'keyword-found
|
||
(while keys
|
||
(if (assoc (intern (car keys)) finder-known-keywords)
|
||
(throw 'keyword-found t))
|
||
(setq keys (cdr keys)))
|
||
nil)))
|
||
|
||
(defun lm-adapted-by (&optional file)
|
||
"Return the adapted-by names in file FILE, or current buffer if FILE is nil.
|
||
This is the name of the person who cleaned up this package for
|
||
distribution."
|
||
(lm-with-file file
|
||
(lm-header "adapted-by")))
|
||
|
||
(defun lm-commentary (&optional file)
|
||
"Return the commentary in file FILE, or current buffer if FILE is nil.
|
||
Return the value as a string. In the file, the commentary
|
||
section starts with the tag `Commentary' or `Documentation' and
|
||
ends just before the next section. If the commentary section is
|
||
absent, return nil."
|
||
(lm-with-file file
|
||
(let ((start (lm-commentary-start)))
|
||
(when start
|
||
(buffer-substring-no-properties start (lm-commentary-end))))))
|
||
|
||
(defun lm-homepage (&optional file)
|
||
"Return the homepage in file FILE, or current buffer if FILE is nil."
|
||
(let ((page (lm-with-file file
|
||
(lm-header "\\(?:x-\\)?\\(?:homepage\\|url\\)"))))
|
||
(if (and page (string-match "^<.+>$" page))
|
||
(substring page 1 -1)
|
||
page)))
|
||
|
||
;;; Verification and synopses
|
||
|
||
(defun lm-insert-at-column (col &rest strings)
|
||
"Insert, at column COL, list of STRINGS."
|
||
(if (> (current-column) col) (insert "\n"))
|
||
(move-to-column col t)
|
||
(apply 'insert strings))
|
||
|
||
(defun lm-verify (&optional file showok verbose non-fsf-ok)
|
||
"Check that the current buffer (or FILE if given) is in proper format.
|
||
If FILE is a directory, recurse on its files and generate a report in a
|
||
temporary buffer. In that case, the optional argument SHOWOK
|
||
says display \"OK\" in temp buffer for files that have no problems.
|
||
|
||
Optional argument VERBOSE specifies verbosity level.
|
||
Optional argument NON-FSF-OK if non-nil means a non-FSF
|
||
copyright notice is allowed."
|
||
(interactive (list nil nil t))
|
||
(let* ((ret (and verbose "Ok"))
|
||
name)
|
||
(if (and file (file-directory-p file))
|
||
(setq ret
|
||
(with-temp-buffer
|
||
(dolist (f (directory-files file nil "\\.el\\'")
|
||
(buffer-string))
|
||
(when (file-regular-p f)
|
||
(let ((status (lm-verify f)))
|
||
(insert f ":")
|
||
(if status
|
||
(lm-insert-at-column lm-comment-column status
|
||
"\n")
|
||
(if showok
|
||
(lm-insert-at-column lm-comment-column
|
||
"OK\n"))))))))
|
||
(lm-with-file file
|
||
(setq name (lm-get-package-name))
|
||
(setq ret
|
||
(cond
|
||
((null name)
|
||
"Can't find package name")
|
||
((not (lm-authors))
|
||
"`Author:' tag missing")
|
||
((not (lm-maintainer))
|
||
"`Maintainer:' tag missing")
|
||
((not (lm-summary))
|
||
"Can't find the one-line summary description")
|
||
((not (lm-keywords))
|
||
"`Keywords:' tag missing")
|
||
((not (lm-keywords-finder-p))
|
||
"`Keywords:' has no valid finder keywords (see `finder-known-keywords')")
|
||
((not (lm-commentary-mark))
|
||
"Can't find a `Commentary' section marker")
|
||
((not (lm-history-mark))
|
||
"Can't find a `History' section marker")
|
||
((not (lm-code-mark))
|
||
"Can't find a `Code' section marker")
|
||
((progn
|
||
(goto-char (point-max))
|
||
(not
|
||
(re-search-backward
|
||
(concat "^;;;[ \t]+" name "[ \t]+ends here[ \t]*$"
|
||
"\\|^;;;[ \t]+ End of file[ \t]+" name)
|
||
nil t)))
|
||
"Can't find the footer line")
|
||
((not (and (lm-copyright-mark) (lm-crack-copyright)))
|
||
"Can't find a valid copyright notice")
|
||
((not (or non-fsf-ok
|
||
(string-match "Free Software Foundation"
|
||
(car (lm-crack-copyright)))))
|
||
"Copyright holder is not the Free Software Foundation")
|
||
(t
|
||
ret)))))
|
||
(if verbose
|
||
(message "%s" ret))
|
||
ret))
|
||
|
||
(defun lm-synopsis (&optional file showall)
|
||
"Generate a synopsis listing for the buffer or the given FILE if given.
|
||
If FILE is a directory, recurse on its files and generate a report in
|
||
a temporary buffer. If SHOWALL is non-nil, also generate a line for files
|
||
which do not include a recognizable synopsis."
|
||
(interactive
|
||
(list
|
||
(read-file-name "Synopsis for (file or dir): ")))
|
||
|
||
(if (and file (file-directory-p file))
|
||
(with-output-to-temp-buffer "*Synopsis*"
|
||
(set-buffer standard-output)
|
||
(dolist (f (directory-files file nil ".*\\.el\\'"))
|
||
(let ((syn (lm-synopsis (expand-file-name f file))))
|
||
(when (or syn showall)
|
||
(insert f ":")
|
||
(lm-insert-at-column lm-comment-column (or syn "NA") "\n")))))
|
||
(save-excursion
|
||
(let ((must-kill (and file (not (get-file-buffer file)))))
|
||
(when file (find-file file))
|
||
(prog1
|
||
(if (called-interactively-p 'interactive)
|
||
(message "%s" (lm-summary))
|
||
(lm-summary))
|
||
(when must-kill (kill-buffer (current-buffer))))))))
|
||
|
||
(defvar report-emacs-bug-address)
|
||
|
||
(defun lm-report-bug (topic)
|
||
"Report a bug in the package currently being visited to its maintainer.
|
||
Prompts for bug subject TOPIC. Leaves you in a mail buffer."
|
||
(interactive "sBug Subject: ")
|
||
(require 'emacsbug)
|
||
(let ((package (lm-get-package-name))
|
||
(addr (lm-maintainer))
|
||
(version (lm-version)))
|
||
(compose-mail (if addr
|
||
(concat (car addr) " <" (cdr addr) ">")
|
||
report-emacs-bug-address)
|
||
topic)
|
||
(goto-char (point-max))
|
||
(insert "\nIn " package)
|
||
(if version
|
||
(insert " version " version))
|
||
(newline 2)
|
||
(message "%s"
|
||
(substitute-command-keys "Type \\[mail-send] to send bug report."))))
|
||
|
||
(provide 'lisp-mnt)
|
||
|
||
;;; lisp-mnt.el ends here
|