1 eval '(exit $?0)' && eval 'exec perl -wS "$0" ${1+"$@"}'
2 & eval 'exec perl -wS "$0" $argv:q'
4 # Convert git log output to ChangeLog format.
6 my $VERSION = '2012-07-16 18:34'; # UTC
7 # The definition above must lie within the first 8 lines in order
8 # for the Emacs time-stamp write hook (at end) to update it.
9 # If you change this file with Emacs, please let the write hook
10 # do its job. Otherwise, update this string manually.
12 # Copyright (C) 2008-2012 Free Software Foundation, Inc.
14 # This program is free software: you can redistribute it and/or modify
15 # it under the terms of the GNU General Public License as published by
16 # the Free Software Foundation, either version 3 of the License, or
17 # (at your option) any later version.
19 # This program is distributed in the hope that it will be useful,
20 # but WITHOUT ANY WARRANTY; without even the implied warranty of
21 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 # GNU General Public License for more details.
24 # You should have received a copy of the GNU General Public License
25 # along with this program. If not, see <http://www.gnu.org/licenses/>.
27 # Written by Jim Meyering
32 use POSIX qw(strftime);
34 (my $ME = $0) =~ s|.*/||;
36 # use File::Coda; # http://meyering.net/code/Coda/
38 defined fileno STDOUT or return;
39 close STDOUT and return;
40 warn "$ME: failed to close standard output: $!\n";
47 my $STREAM = ($exit_code == 0 ? *STDOUT : *STDERR);
50 print $STREAM "Try '$ME --help' for more information.\n";
55 Usage: $ME [OPTIONS] [ARGS]
57 Convert git log output to ChangeLog format. If present, any ARGS
58 are passed to "git log". To avoid ARGS being parsed as options to
59 $ME, they may be preceded by '--'.
63 --amend=FILE FILE maps from an SHA1 to perl code (i.e., s/old/new/) that
64 makes a change to SHA1's commit log text or metadata.
65 --append-dot append a dot to the first line of each commit message if
66 there is no other punctuation or blank at the end.
67 --no-cluster never cluster commit messages under the same date/author
68 header; the default is to cluster adjacent commit messages
69 if their headers are the same and neither commit message
70 contains multiple paragraphs.
71 --srcdir=DIR the root of the source tree, containing the '.git' directory.
72 --since=DATE convert only the logs since DATE;
73 the default is to convert all log entries.
74 --format=FMT set format string for commit subject and body;
75 see 'man git-log' for the list of format metacharacters;
76 the default is '%s%n%b%n'
77 --strip-tab remove one additional leading TAB from commit message lines.
78 --strip-cherry-pick remove data inserted by "git cherry-pick";
79 this includes the "cherry picked from commit ..." line,
80 and the possible final "Conflicts:" paragraph.
81 --help display this help and exit
82 --version output version information and exit
86 $ME --since=2008-01-01 > ChangeLog
87 $ME -- -n 5 foo > last-5-commits-to-branch-foo
91 The following types of strings are interpreted specially when they appear
92 at the beginning of a log message line. They are not copied to the output.
94 Copyright-paperwork-exempt: Yes
95 Append the "(tiny change)" notation to the usual "date name email"
96 ChangeLog header to mark a change that does not require a copyright
98 Co-authored-by: Joe User <user\@example.com>
99 List the specified name and email address on a second
100 ChangeLog header, denoting a co-author.
101 Signed-off-by: Joe User <user\@example.com>
102 These lines are simply elided.
104 In a FILE specified via --amend, comment lines (starting with "#") are ignored.
105 FILE must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1 (alone on
106 a line) referring to a commit in the current project, and CODE refers to one
107 or more consecutive lines of Perl code. Pairs must be separated by one or
110 Here is sample input for use with --amend=FILE, from coreutils:
112 3a169f4c5d9159283548178668d2fae6fced3030
114 s/all tile types/all file types/
116 1379ed974f1fa39b12e2ffab18b3f7a607082202
117 # Due to a bug in vc-dwim, I mis-attributed a patch by Paul to myself.
118 # Change the author to be Paul. Note the escaped "@":
119 s,Jim .*>,Paul Eggert <eggert\\\@cs.ucla.edu>,
126 # If the string $S is a well-behaved file name, simply return it.
127 # If it contains white space, quotes, etc., quote it, and return the new string.
131 if ($s =~ m![^\w+/.,-]!)
133 # Convert each single quote to '\''
134 $s =~ s/\'/\'\\\'\'/g;
135 # Then single quote the string.
143 return join (' ', map {shell_quote $_} @_);
147 # Comment lines (starting with "#") are ignored.
148 # F must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1
149 # (alone on a line) referring to a commit in the current project, and
150 # CODE refers to one or more consecutive lines of Perl code.
151 # Pairs must be separated by one or more blank line.
152 sub parse_amend_file($)
157 or die "$ME: $f: failed to open for reading: $!\n";
163 while (defined (my $line = <F>))
169 and $in_code = 0, next;
173 $line =~ /^([0-9a-fA-F]{40})$/
174 or (warn "$ME: $f:$.: invalid line; expected an SHA1\n"),
179 and (warn "$ME: $f:$.: duplicate SHA1\n"),
185 $h->{$sha} .= "$line\n";
198 my $format_string = '%s%n%b%n';
203 my $strip_cherry_pick = 0;
207 help => sub { usage 0 },
208 version => sub { print "$ME version $VERSION\n"; exit },
209 'since=s' => \$since_date,
210 'format=s' => \$format_string,
211 'amend=s' => \$amend_file,
212 'append-dot' => \$append_dot,
213 'cluster!' => \$cluster,
214 'strip-tab' => \$strip_tab,
215 'strip-cherry-pick' => \$strip_cherry_pick,
216 'srcdir=s' => \$srcdir,
220 and unshift @ARGV, "--since=$since_date";
222 # This is a hash that maps an SHA1 to perl code (i.e., s/old/new/)
223 # that makes a correction in the log or attribution of that commit.
224 my $amend_code = defined $amend_file ? parse_amend_file $amend_file : {};
227 defined $srcdir ? ("--git-dir=$srcdir/.git") : (),
229 '--pretty=format:%H:%ct %an <%ae>%n%n'.$format_string, @ARGV);
230 open PIPE, '-|', @cmd
231 or die ("$ME: failed to run '". quoted_cmd (@cmd) ."': $!\n"
232 . "(Is your Git too old? Version 1.5.1 or later is required.)\n");
234 my $prev_multi_paragraph;
235 my $prev_date_line = '';
236 my @prev_coauthors = ();
239 defined (my $in = <PIPE>)
241 $in =~ /^log size (\d+)$/
242 or die "$ME:$.: Invalid line (expected log size):\n$in";
246 my $n_read = read PIPE, $log, $log_nbytes;
247 $n_read == $log_nbytes
248 or die "$ME:$.: unexpected EOF\n";
250 # Extract leading hash.
251 my ($sha, $rest) = split ':', $log, 2;
253 or die "$ME:$.: malformed log entry\n";
254 $sha =~ /^[0-9a-fA-F]{40}$/
255 or die "$ME:$.: invalid SHA1: $sha\n";
257 # If this commit's log requires any transformation, do it now.
258 my $code = $amend_code->{$sha};
263 # Put the unpreprocessed entry into "$_".
266 # Let $code operate on it, safely.
267 my $r = $s->reval("$code")
268 or die "$ME:$.:$sha: failed to eval \"$code\":\n$@\n";
270 # Note that we've used this entry.
271 delete $amend_code->{$sha};
273 # Update $rest upon success.
277 # Remove lines inserted by "git cherry-pick".
278 if ($strip_cherry_pick)
280 $rest =~ s/^\s*Conflicts:\n.*//sm;
281 $rest =~ s/^\s*\(cherry picked from commit [\da-f]+\)\n//m;
284 my @line = split "\n", $rest;
285 my $author_line = shift @line;
287 or die "$ME:$.: unexpected EOF\n";
288 $author_line =~ /^(\d+) (.*>)$/
289 or die "$ME:$.: Invalid line "
290 . "(expected date/author/email):\n$author_line\n";
292 # Format 'Copyright-paperwork-exempt: Yes' as a standard ChangeLog
293 # `(tiny change)' annotation.
294 my $tiny = (grep (/^Copyright-paperwork-exempt:\s+[Yy]es$/, @line)
295 ? ' (tiny change)' : '');
297 my $date_line = sprintf "%s %s$tiny\n",
298 strftime ("%F", localtime ($1)), $2;
300 my @coauthors = grep /^Co-authored-by:.*$/, @line;
301 # Omit meta-data lines we've already interpreted.
302 @line = grep !/^(?:Signed-off-by:[ ].*>$
304 |Copyright-paperwork-exempt:[ ]
307 # Remove leading and trailing blank lines.
310 while ($line[0] =~ /^\s*$/) { shift @line; }
311 while ($line[$#line] =~ /^\s*$/) { pop @line; }
314 # Record whether there are two or more paragraphs.
315 my $multi_paragraph = grep /^\s*$/, @line;
317 # Format 'Co-authored-by: A U Thor <email@example.com>' lines in
318 # standard multi-author ChangeLog format.
321 s/^Co-authored-by:\s*/\t /;
325 or warn "$ME: warning: missing email address for "
326 . substr ($_, 5) . "\n";
329 # If clustering of commit messages has been disabled, if this header
330 # would be different from the previous date/name/email/coauthors header,
331 # or if this or the previous entry consists of two or more paragraphs,
332 # then print the header.
334 || $date_line ne $prev_date_line
335 || "@coauthors" ne "@prev_coauthors"
337 || $prev_multi_paragraph)
339 $prev_date_line eq ''
343 and print join ("\n", @coauthors), "\n";
345 $prev_date_line = $date_line;
346 @prev_coauthors = @coauthors;
347 $prev_multi_paragraph = $multi_paragraph;
349 # If there were any lines
352 warn "$ME: warning: empty commit message:\n $date_line\n";
358 # If the first line of the message has enough room, then
359 if (length $line[0] < 72)
361 # append a dot if there is no other punctuation or blank
363 $line[0] =~ /[[:punct:]\s]$/
368 # Remove one additional leading TAB from each line.
370 and map { s/^\t// } @line;
372 # Prefix each non-empty line with a TAB.
373 @line = map { length $_ ? "\t$_" : '' } @line;
375 print "\n", join ("\n", @line), "\n";
378 defined ($in = <PIPE>)
381 and die "$ME:$.: unexpected line:\n$in";
385 or die "$ME: error closing pipe from " . quoted_cmd (@cmd) . "\n";
386 # FIXME-someday: include $PROCESS_STATUS in the diagnostic
388 # Complain about any unused entry in the --amend=F specified file.
390 foreach my $sha (keys %$amend_code)
392 warn "$ME:$amend_file: unused entry: $sha\n";
401 # indent-tabs-mode: nil
402 # eval: (add-hook 'write-file-hooks 'time-stamp)
403 # time-stamp-start: "my $VERSION = '"
404 # time-stamp-format: "%:y-%02m-%02d %02H:%02M"
405 # time-stamp-time-zone: "UTC"
406 # time-stamp-end: "'; # UTC"