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 = '2012-07-29 06:11'; # 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, from which the .git/
72 directory can be derived.
73 --since=DATE convert only the logs since DATE;
74 the default is to convert all log entries.
75 --format=FMT set format string for commit subject and body;
76 see 'man git-log' for the list of format metacharacters;
77 the default is '%s%n%b%n'
78 --strip-tab remove one additional leading TAB from commit message lines.
79 --strip-cherry-pick remove data inserted by "git cherry-pick";
80 this includes the "cherry picked from commit ..." line,
81 and the possible final "Conflicts:" paragraph.
82 --help display this help and exit
83 --version output version information and exit
87 $ME --since=2008-01-01 > ChangeLog
88 $ME -- -n 5 foo > last-5-commits-to-branch-foo
92 The following types of strings are interpreted specially when they appear
93 at the beginning of a log message line. They are not copied to the output.
95 Copyright-paperwork-exempt: Yes
96 Append the "(tiny change)" notation to the usual "date name email"
97 ChangeLog header to mark a change that does not require a copyright
99 Co-authored-by: Joe User <user\@example.com>
100 List the specified name and email address on a second
101 ChangeLog header, denoting a co-author.
102 Signed-off-by: Joe User <user\@example.com>
103 These lines are simply elided.
105 In a FILE specified via --amend, comment lines (starting with "#") are ignored.
106 FILE must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1 (alone on
107 a line) referring to a commit in the current project, and CODE refers to one
108 or more consecutive lines of Perl code. Pairs must be separated by one or
111 Here is sample input for use with --amend=FILE, from coreutils:
113 3a169f4c5d9159283548178668d2fae6fced3030
115 s/all tile types/all file types/
117 1379ed974f1fa39b12e2ffab18b3f7a607082202
118 # Due to a bug in vc-dwim, I mis-attributed a patch by Paul to myself.
119 # Change the author to be Paul. Note the escaped "@":
120 s,Jim .*>,Paul Eggert <eggert\\\@cs.ucla.edu>,
127 # If the string $S is a well-behaved file name, simply return it.
128 # If it contains white space, quotes, etc., quote it, and return the new string.
132 if ($s =~ m![^\w+/.,-]!)
134 # Convert each single quote to '\''
135 $s =~ s/\'/\'\\\'\'/g;
136 # Then single quote the string.
144 return join (' ', map {shell_quote $_} @_);
148 # Comment lines (starting with "#") are ignored.
149 # F must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1
150 # (alone on a line) referring to a commit in the current project, and
151 # CODE refers to one or more consecutive lines of Perl code.
152 # Pairs must be separated by one or more blank line.
153 sub parse_amend_file($)
158 or die "$ME: $f: failed to open for reading: $!\n";
164 while (defined (my $line = <F>))
170 and $in_code = 0, next;
174 $line =~ /^([0-9a-fA-F]{40})$/
175 or (warn "$ME: $f:$.: invalid line; expected an SHA1\n"),
180 and (warn "$ME: $f:$.: duplicate SHA1\n"),
186 $h->{$sha} .= "$line\n";
197 # git_dir_option $SRCDIR
199 # From $SRCDIR, the --git-dir option to pass to git (none if $SRCDIR
200 # is undef). Return as a list (0 or 1 element).
201 sub git_dir_option($)
207 my $qdir = shell_quote $srcdir;
208 my $cmd = "cd $qdir && git rev-parse --show-toplevel";
209 my $qcmd = shell_quote $cmd;
210 my $git_dir = qx($cmd);
212 or die "$ME: cannot run $qcmd: $!\n";
214 or die "$ME: $qcmd had unexpected exit code or signal ($?)\n";
216 push @res, "--git-dir=$git_dir/.git";
223 my $format_string = '%s%n%b%n';
228 my $strip_cherry_pick = 0;
232 help => sub { usage 0 },
233 version => sub { print "$ME version $VERSION\n"; exit },
234 'since=s' => \$since_date,
235 'format=s' => \$format_string,
236 'amend=s' => \$amend_file,
237 'append-dot' => \$append_dot,
238 'cluster!' => \$cluster,
239 'strip-tab' => \$strip_tab,
240 'strip-cherry-pick' => \$strip_cherry_pick,
241 'srcdir=s' => \$srcdir,
245 and unshift @ARGV, "--since=$since_date";
247 # This is a hash that maps an SHA1 to perl code (i.e., s/old/new/)
248 # that makes a correction in the log or attribution of that commit.
249 my $amend_code = defined $amend_file ? parse_amend_file $amend_file : {};
252 git_dir_option $srcdir,
254 '--pretty=format:%H:%ct %an <%ae>%n%n'.$format_string, @ARGV);
255 open PIPE, '-|', @cmd
256 or die ("$ME: failed to run '". quoted_cmd (@cmd) ."': $!\n"
257 . "(Is your Git too old? Version 1.5.1 or later is required.)\n");
259 my $prev_multi_paragraph;
260 my $prev_date_line = '';
261 my @prev_coauthors = ();
264 defined (my $in = <PIPE>)
266 $in =~ /^log size (\d+)$/
267 or die "$ME:$.: Invalid line (expected log size):\n$in";
271 my $n_read = read PIPE, $log, $log_nbytes;
272 $n_read == $log_nbytes
273 or die "$ME:$.: unexpected EOF\n";
275 # Extract leading hash.
276 my ($sha, $rest) = split ':', $log, 2;
278 or die "$ME:$.: malformed log entry\n";
279 $sha =~ /^[0-9a-fA-F]{40}$/
280 or die "$ME:$.: invalid SHA1: $sha\n";
282 # If this commit's log requires any transformation, do it now.
283 my $code = $amend_code->{$sha};
288 # Put the unpreprocessed entry into "$_".
291 # Let $code operate on it, safely.
292 my $r = $s->reval("$code")
293 or die "$ME:$.:$sha: failed to eval \"$code\":\n$@\n";
295 # Note that we've used this entry.
296 delete $amend_code->{$sha};
298 # Update $rest upon success.
302 # Remove lines inserted by "git cherry-pick".
303 if ($strip_cherry_pick)
305 $rest =~ s/^\s*Conflicts:\n.*//sm;
306 $rest =~ s/^\s*\(cherry picked from commit [\da-f]+\)\n//m;
309 my @line = split "\n", $rest;
310 my $author_line = shift @line;
312 or die "$ME:$.: unexpected EOF\n";
313 $author_line =~ /^(\d+) (.*>)$/
314 or die "$ME:$.: Invalid line "
315 . "(expected date/author/email):\n$author_line\n";
317 # Format 'Copyright-paperwork-exempt: Yes' as a standard ChangeLog
318 # `(tiny change)' annotation.
319 my $tiny = (grep (/^Copyright-paperwork-exempt:\s+[Yy]es$/, @line)
320 ? ' (tiny change)' : '');
322 my $date_line = sprintf "%s %s$tiny\n",
323 strftime ("%F", localtime ($1)), $2;
325 my @coauthors = grep /^Co-authored-by:.*$/, @line;
326 # Omit meta-data lines we've already interpreted.
327 @line = grep !/^(?:Signed-off-by:[ ].*>$
329 |Copyright-paperwork-exempt:[ ]
332 # Remove leading and trailing blank lines.
335 while ($line[0] =~ /^\s*$/) { shift @line; }
336 while ($line[$#line] =~ /^\s*$/) { pop @line; }
339 # Record whether there are two or more paragraphs.
340 my $multi_paragraph = grep /^\s*$/, @line;
342 # Format 'Co-authored-by: A U Thor <email@example.com>' lines in
343 # standard multi-author ChangeLog format.
346 s/^Co-authored-by:\s*/\t /;
350 or warn "$ME: warning: missing email address for "
351 . substr ($_, 5) . "\n";
354 # If clustering of commit messages has been disabled, if this header
355 # would be different from the previous date/name/email/coauthors header,
356 # or if this or the previous entry consists of two or more paragraphs,
357 # then print the header.
359 || $date_line ne $prev_date_line
360 || "@coauthors" ne "@prev_coauthors"
362 || $prev_multi_paragraph)
364 $prev_date_line eq ''
368 and print join ("\n", @coauthors), "\n";
370 $prev_date_line = $date_line;
371 @prev_coauthors = @coauthors;
372 $prev_multi_paragraph = $multi_paragraph;
374 # If there were any lines
377 warn "$ME: warning: empty commit message:\n $date_line\n";
383 # If the first line of the message has enough room, then
384 if (length $line[0] < 72)
386 # append a dot if there is no other punctuation or blank
388 $line[0] =~ /[[:punct:]\s]$/
393 # Remove one additional leading TAB from each line.
395 and map { s/^\t// } @line;
397 # Prefix each non-empty line with a TAB.
398 @line = map { length $_ ? "\t$_" : '' } @line;
400 print "\n", join ("\n", @line), "\n";
403 defined ($in = <PIPE>)
406 and die "$ME:$.: unexpected line:\n$in";
410 or die "$ME: error closing pipe from " . quoted_cmd (@cmd) . "\n";
411 # FIXME-someday: include $PROCESS_STATUS in the diagnostic
413 # Complain about any unused entry in the --amend=F specified file.
415 foreach my $sha (keys %$amend_code)
417 warn "$ME:$amend_file: unused entry: $sha\n";
426 # indent-tabs-mode: nil
427 # eval: (add-hook 'write-file-hooks 'time-stamp)
428 # time-stamp-start: "my $VERSION = '"
429 # time-stamp-format: "%:y-%02m-%02d %02H:%02M"
430 # time-stamp-time-zone: "UTC"
431 # time-stamp-end: "'; # UTC"