mirror of
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268 lines
7.1 KiB
Perl
Executable File
268 lines
7.1 KiB
Perl
Executable File
#! /usr/bin/perl
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# Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004,
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# 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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#
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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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# Extract entries from ChangeLogs matching specified criteria.
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# Optionally format the resulting output to a form suitable for RCS
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# logs, like they are used in Emacs, for example. In this format,
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# author lines, leading spaces, and file names are removed.
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require 5;
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use strict;
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# Parse command line options.
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use vars qw($author $regexp $exclude $from_date $to_date
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$rcs_log $with_date $version $help $reverse
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@entries);
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use Getopt::Long;
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my $result;
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if (@ARGV == 0) {
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# No arguments cannot possibly mean "show everything"!!
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$result = 0;
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} else {
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$result = GetOptions ("author=s" => \$author,
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"text=s" => \$regexp,
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"exclude=s" => \$exclude,
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"from-date=s" => \$from_date,
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"to-date=s" => \$to_date,
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"rcs-log" => \$rcs_log,
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"with-date" => \$with_date,
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"reverse!" => \$reverse,
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"version" => \$version,
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"help" => \$help);
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# If date options are specified, check that they have the format
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# YYYY-MM-DD.
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$result = 0 if $from_date && $from_date !~ /^\d\d\d\d-\d\d-\d\d$/;
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$result = 0 if $to_date && $to_date !~ /^\d\d\d\d-\d\d-\d\d$/;
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}
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# Print usage information and exit when necessary.
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if ($result == 0 || $help) {
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print <<USAGE;
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Usage: $0 [options] [CHANGELOG...]
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Print entries in ChangeLogs matching various criteria.
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Valid options are:
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--author=AUTHOR Match entries whose author line matches
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regular expression AUTHOR
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--text=TEXT Match entries whose text matches regular
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expression TEXT
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--exclude=TEXT Exclude entries matching TEXT
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--from-date=YYYY-MM-DD Match entries not older than given date
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--to-date=YYYY-MM-DD Match entries not younger than given date
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--rcs-log Format output suitable for RCS log entries
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--with-date Print short date line in RCS log
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--reverse Show entries in reverse (chronological) order
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--version Print version info
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--help Print this help
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If no CHANGELOG is specified scan the files "ChangeLog" and
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"ChangeLog.N+" in the current directory. Old-style dates in ChangeLogs
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are not recognized.
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USAGE
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exit !$help;
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}
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# Print version info and exit if `--version' was specified.
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if ($version) {
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print "0.3\n";
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exit 0;
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}
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# Value is non-zero if HEADER matches according to command line
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# options specified, i.e. it matches $author, and its date is in
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# the range $from_date <= date <= $to_date.
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sub header_match_p {
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my $header = shift;
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return 0 unless $header;
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# No match if AUTHOR-regexp specified and doesn't match.
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return 0 if $author && $header !~ /$author/;
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# Check that the date of the entry matches if date options
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# `--from-date' and/or `--to-date' were specified . Old-style
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# dates in ChangeLogs are not recognized, and never match.
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if ($from_date || $to_date) {
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if ($header =~ /^(\d\d\d\d-\d\d-\d\d)/) {
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my $date = $1;
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return 0 if $from_date && $date lt $from_date;
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return 0 if $to_date && $date gt $to_date;
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} else {
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# Don't bother recognizing old-style dates.
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return 0;
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}
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}
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return 1;
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}
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# Value is non-zero if ENTRY matches the criteria specified on the
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# command line, i.e. it matches $regexp, and it doesn't match
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# $exclude.
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sub entry_match_p {
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my $entry = shift;
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return 0 unless $entry;
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if ($regexp) {
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return 1 if ($entry =~ /$regexp/
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&& (!$exclude || $entry !~ $exclude));
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} else {
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return 1 if !$exclude || $entry !~ $exclude;
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}
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return 0;
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}
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# Print HEADER and/or ENTRY in a format suitable for what was
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# specified on the command line. If $rcs_log is specified, author
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# lines are not printed, and leading spaces and file names are removed
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# from ChangeLog entries.
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sub print_log {
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my ($header, $entry) = @_;
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my $output = '';
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if ($rcs_log) {
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# Remove leading whitespace from entry.
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$entry =~ s/^\s+//mg;
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# Remove file name parts.
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$entry =~ s/^\*.*\(/(/mg;
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# Remove file name parts, 2.
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$entry =~ s/^\*.*://mg;
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if ($with_date) {
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$header =~ /(\d\d\d\d-\d\d-\d\d)/;
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$output = "!changelog-date $1\n";
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}
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$output .= $entry;
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} else {
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$output .= $header . $entry;
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}
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if ($reverse) {
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push @entries, $output;
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} else {
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print $output;
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}
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}
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# Scan LOG for matching entries, and print them to standard output.
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sub parse_changelog {
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my $log = shift;
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my $entry = undef;
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my $header = undef;
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@entries = () if $reverse;
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# Open the ChangeLog.
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open (IN, "< $log") || die "Cannot open $log: $!";
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while (defined(my $line = <IN>)) {
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if ($line =~ /^\S/) {
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# Line is an author-line. Print previous entry if
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# it matches.
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print_log ($header, $entry)
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if header_match_p ($header) && entry_match_p ($entry);
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$entry = "";
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$header = $line;
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# Add empty lines below the header.
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while (defined($line = <IN>) && $line =~ /^\s*$/) {
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$header = "$header$line";
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}
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}
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last unless defined $line;
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if ($line =~ /^\s*\*/) {
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# LINE is the first line of a ChangeLog entry. Print
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# previous entry if it matches.
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print_log ($header, $entry)
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if header_match_p ($header) && entry_match_p ($entry);
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$entry = $line;
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} else {
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# Add LINE to the current entry.
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$entry = "$entry$line";
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}
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}
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# Print last entry if it matches.
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print_log ($header, $entry)
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if header_match_p ($header) && entry_match_p ($entry);
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close IN;
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if ($reverse) {
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for (my $entry = @entries; $entry; $entry--) {
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print $entries[$entry-1];
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}
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}
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}
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# Main program. Process ChangeLogs.
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# If files were specified on the command line, parse those files in the
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# order supplied by the user; otherwise parse default files ChangeLog and
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# ChangeLog.NNN according to $reverse.
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unless (@ARGV > 0) {
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@ARGV = ("ChangeLog");
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push @ARGV,
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map {"ChangeLog.$_"}
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sort {$b <=> $a}
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map {/\.(\d+)$/; $1}
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do {
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opendir D, '.';
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grep /^ChangeLog\.\d+$/, readdir D;
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};
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@ARGV = reverse @ARGV if $reverse;
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}
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while (defined (my $log = shift @ARGV)) {
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parse_changelog ($log) if -f $log;
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}
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# arch-tag: 9e4f6749-e053-4bb7-b3ad-11947318418e
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# grep-changelog ends here.
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