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 = '2012-05-22 09:40'; # 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 --since=DATE convert only the logs since DATE;
72 the default is to convert all log entries.
73 --format=FMT set format string for commit subject and body;
74 see 'man git-log' for the list of format metacharacters;
75 the default is '%s%n%b%n'
76 --strip-tab remove one additional leading TAB from commit message lines.
77 --strip-cherry-pick remove data inserted by "git cherry-pick";
78 this includes the "cherry picked from commit ..." line,
79 and the possible final "Conflicts:" paragraph.
80 --help display this help and exit
81 --version output version information and exit
85 $ME --since=2008-01-01 > ChangeLog
86 $ME -- -n 5 foo > last-5-commits-to-branch-foo
90 The following types of strings are interpreted specially when they appear
91 at the beginning of a log message line. They are not copied to the output.
93 Copyright-paperwork-exempt: Yes
94 Append the "(tiny change)" notation to the usual "date name email"
95 ChangeLog header to mark a change that does not require a copyright
97 Co-authored-by: Joe User <user\@example.com>
98 List the specified name and email address on a second
99 ChangeLog header, denoting a co-author.
100 Signed-off-by: Joe User <user\@example.com>
101 These lines are simply elided.
103 In a FILE specified via --amend, comment lines (starting with "#") are ignored.
104 FILE must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1 (alone on
105 a line) referring to a commit in the current project, and CODE refers to one
106 or more consecutive lines of Perl code. Pairs must be separated by one or
109 Here is sample input for use with --amend=FILE, from coreutils:
111 3a169f4c5d9159283548178668d2fae6fced3030
113 s/all tile types/all file types/
115 1379ed974f1fa39b12e2ffab18b3f7a607082202
116 # Due to a bug in vc-dwim, I mis-attributed a patch by Paul to myself.
117 # Change the author to be Paul. Note the escaped "@":
118 s,Jim .*>,Paul Eggert <eggert\\\@cs.ucla.edu>,
125 # If the string $S is a well-behaved file name, simply return it.
126 # If it contains white space, quotes, etc., quote it, and return the new string.
130 if ($s =~ m![^\w+/.,-]!)
132 # Convert each single quote to '\''
133 $s =~ s/\'/\'\\\'\'/g;
134 # Then single quote the string.
142 return join (' ', map {shell_quote $_} @_);
146 # Comment lines (starting with "#") are ignored.
147 # F must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1
148 # (alone on a line) referring to a commit in the current project, and
149 # CODE refers to one or more consecutive lines of Perl code.
150 # Pairs must be separated by one or more blank line.
151 sub parse_amend_file($)
156 or die "$ME: $f: failed to open for reading: $!\n";
162 while (defined (my $line = <F>))
168 and $in_code = 0, next;
172 $line =~ /^([0-9a-fA-F]{40})$/
173 or (warn "$ME: $f:$.: invalid line; expected an SHA1\n"),
178 and (warn "$ME: $f:$.: duplicate SHA1\n"),
184 $h->{$sha} .= "$line\n";
197 my $format_string = '%s%n%b%n';
202 my $strip_cherry_pick = 0;
205 help => sub { usage 0 },
206 version => sub { print "$ME version $VERSION\n"; exit },
207 'since=s' => \$since_date,
208 'format=s' => \$format_string,
209 'amend=s' => \$amend_file,
210 'append-dot' => \$append_dot,
211 'cluster!' => \$cluster,
212 'strip-tab' => \$strip_tab,
213 'strip-cherry-pick' => \$strip_cherry_pick,
218 and unshift @ARGV, "--since=$since_date";
220 # This is a hash that maps an SHA1 to perl code (i.e., s/old/new/)
221 # that makes a correction in the log or attribution of that commit.
222 my $amend_code = defined $amend_file ? parse_amend_file $amend_file : {};
224 my @cmd = (qw (git log --log-size),
225 '--pretty=format:%H:%ct %an <%ae>%n%n'.$format_string, @ARGV);
226 open PIPE, '-|', @cmd
227 or die ("$ME: failed to run '". quoted_cmd (@cmd) ."': $!\n"
228 . "(Is your Git too old? Version 1.5.1 or later is required.)\n");
230 my $prev_multi_paragraph;
231 my $prev_date_line = '';
232 my @prev_coauthors = ();
235 defined (my $in = <PIPE>)
237 $in =~ /^log size (\d+)$/
238 or die "$ME:$.: Invalid line (expected log size):\n$in";
242 my $n_read = read PIPE, $log, $log_nbytes;
243 $n_read == $log_nbytes
244 or die "$ME:$.: unexpected EOF\n";
246 # Extract leading hash.
247 my ($sha, $rest) = split ':', $log, 2;
249 or die "$ME:$.: malformed log entry\n";
250 $sha =~ /^[0-9a-fA-F]{40}$/
251 or die "$ME:$.: invalid SHA1: $sha\n";
253 # If this commit's log requires any transformation, do it now.
254 my $code = $amend_code->{$sha};
259 # Put the unpreprocessed entry into "$_".
262 # Let $code operate on it, safely.
263 my $r = $s->reval("$code")
264 or die "$ME:$.:$sha: failed to eval \"$code\":\n$@\n";
266 # Note that we've used this entry.
267 delete $amend_code->{$sha};
269 # Update $rest upon success.
273 # Remove lines inserted by "git cherry-pick".
274 if ($strip_cherry_pick)
276 $rest =~ s/^\s*Conflicts:\n.*//sm;
277 $rest =~ s/^\s*\(cherry picked from commit [\da-f]+\)\n//m;
280 my @line = split "\n", $rest;
281 my $author_line = shift @line;
283 or die "$ME:$.: unexpected EOF\n";
284 $author_line =~ /^(\d+) (.*>)$/
285 or die "$ME:$.: Invalid line "
286 . "(expected date/author/email):\n$author_line\n";
288 # Format 'Copyright-paperwork-exempt: Yes' as a standard ChangeLog
289 # `(tiny change)' annotation.
290 my $tiny = (grep (/^Copyright-paperwork-exempt:\s+[Yy]es$/, @line)
291 ? ' (tiny change)' : '');
293 my $date_line = sprintf "%s %s$tiny\n",
294 strftime ("%F", localtime ($1)), $2;
296 my @coauthors = grep /^Co-authored-by:.*$/, @line;
297 # Omit meta-data lines we've already interpreted.
298 @line = grep !/^(?:Signed-off-by:[ ].*>$
300 |Copyright-paperwork-exempt:[ ]
303 # Remove leading and trailing blank lines.
306 while ($line[0] =~ /^\s*$/) { shift @line; }
307 while ($line[$#line] =~ /^\s*$/) { pop @line; }
310 # Record whether there are two or more paragraphs.
311 my $multi_paragraph = grep /^\s*$/, @line;
313 # Format 'Co-authored-by: A U Thor <email@example.com>' lines in
314 # standard multi-author ChangeLog format.
317 s/^Co-authored-by:\s*/\t /;
321 or warn "$ME: warning: missing email address for "
322 . substr ($_, 5) . "\n";
325 # If clustering of commit messages has been disabled, if this header
326 # would be different from the previous date/name/email/coauthors header,
327 # or if this or the previous entry consists of two or more paragraphs,
328 # then print the header.
330 || $date_line ne $prev_date_line
331 || "@coauthors" ne "@prev_coauthors"
333 || $prev_multi_paragraph)
335 $prev_date_line eq ''
339 and print join ("\n", @coauthors), "\n";
341 $prev_date_line = $date_line;
342 @prev_coauthors = @coauthors;
343 $prev_multi_paragraph = $multi_paragraph;
345 # If there were any lines
348 warn "$ME: warning: empty commit message:\n $date_line\n";
354 # If the first line of the message has enough room, then
355 if (length $line[0] < 72)
357 # append a dot if there is no other punctuation or blank
359 $line[0] =~ /[[:punct:]\s]$/
364 # Remove one additional leading TAB from each line.
366 and map { s/^\t// } @line;
368 # Prefix each non-empty line with a TAB.
369 @line = map { length $_ ? "\t$_" : '' } @line;
371 print "\n", join ("\n", @line), "\n";
374 defined ($in = <PIPE>)
377 and die "$ME:$.: unexpected line:\n$in";
381 or die "$ME: error closing pipe from " . quoted_cmd (@cmd) . "\n";
382 # FIXME-someday: include $PROCESS_STATUS in the diagnostic
384 # Complain about any unused entry in the --amend=F specified file.
386 foreach my $sha (keys %$amend_code)
388 warn "$ME:$amend_file: unused entry: $sha\n";
397 # indent-tabs-mode: nil
398 # eval: (add-hook 'write-file-hooks 'time-stamp)
399 # time-stamp-start: "my $VERSION = '"
400 # time-stamp-format: "%:y-%02m-%02d %02H:%02M"
401 # time-stamp-time-zone: "UTC"
402 # time-stamp-end: "'; # UTC"