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 = '2012-01-06 07:14'; # 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 --since=DATE convert only the logs since DATE;
68 the default is to convert all log entries.
69 --format=FMT set format string for commit subject and body;
70 see 'man git-log' for the list of format metacharacters;
71 the default is '%s%n%b%n'
73 --help display this help and exit
74 --version output version information and exit
78 $ME --since=2008-01-01 > ChangeLog
79 $ME -- -n 5 foo > last-5-commits-to-branch-foo
83 The following types of strings are interpreted specially when they appear
84 at the beginning of a log message line. They are not copied to the output.
86 Copyright-paperwork-exempt: Yes
87 Append the "(tiny change)" notation to the usual "date name email"
88 ChangeLog header to mark a change that does not require a copyright
90 Co-authored-by: Joe User <user\@example.com>
91 List the specified name and email address on a second
92 ChangeLog header, denoting a co-author.
93 Signed-off-by: Joe User <user\@example.com>
94 These lines are simply elided.
96 In a FILE specified via --amend, comment lines (starting with "#") are ignored.
97 FILE must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1 (alone on
98 a line) referring to a commit in the current project, and CODE refers to one
99 or more consecutive lines of Perl code. Pairs must be separated by one or
102 Here is sample input for use with --amend=FILE, from coreutils:
104 3a169f4c5d9159283548178668d2fae6fced3030
106 s/all tile types/all file types/
108 1379ed974f1fa39b12e2ffab18b3f7a607082202
109 # Due to a bug in vc-dwim, I mis-attributed a patch by Paul to myself.
110 # Change the author to be Paul. Note the escaped "@":
111 s,Jim .*>,Paul Eggert <eggert\\\@cs.ucla.edu>,
118 # If the string $S is a well-behaved file name, simply return it.
119 # If it contains white space, quotes, etc., quote it, and return the new string.
123 if ($s =~ m![^\w+/.,-]!)
125 # Convert each single quote to '\''
126 $s =~ s/\'/\'\\\'\'/g;
127 # Then single quote the string.
135 return join (' ', map {shell_quote $_} @_);
139 # Comment lines (starting with "#") are ignored.
140 # F must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1
141 # (alone on a line) referring to a commit in the current project, and
142 # CODE refers to one or more consecutive lines of Perl code.
143 # Pairs must be separated by one or more blank line.
144 sub parse_amend_file($)
149 or die "$ME: $f: failed to open for reading: $!\n";
155 while (defined (my $line = <F>))
161 and $in_code = 0, next;
165 $line =~ /^([0-9a-fA-F]{40})$/
166 or (warn "$ME: $f:$.: invalid line; expected an SHA1\n"),
171 and (warn "$ME: $f:$.: duplicate SHA1\n"),
177 $h->{$sha} .= "$line\n";
190 my $format_string = '%s%n%b%n';
195 help => sub { usage 0 },
196 version => sub { print "$ME version $VERSION\n"; exit },
197 'since=s' => \$since_date,
198 'format=s' => \$format_string,
199 'amend=s' => \$amend_file,
200 'append-dot' => \$append_dot,
205 and unshift @ARGV, "--since=$since_date";
207 # This is a hash that maps an SHA1 to perl code (i.e., s/old/new/)
208 # that makes a correction in the log or attribution of that commit.
209 my $amend_code = defined $amend_file ? parse_amend_file $amend_file : {};
211 my @cmd = (qw (git log --log-size),
212 '--pretty=format:%H:%ct %an <%ae>%n%n'.$format_string, @ARGV);
213 open PIPE, '-|', @cmd
214 or die ("$ME: failed to run '". quoted_cmd (@cmd) ."': $!\n"
215 . "(Is your Git too old? Version 1.5.1 or later is required.)\n");
217 my $prev_multi_paragraph;
218 my $prev_date_line = '';
219 my @prev_coauthors = ();
222 defined (my $in = <PIPE>)
224 $in =~ /^log size (\d+)$/
225 or die "$ME:$.: Invalid line (expected log size):\n$in";
229 my $n_read = read PIPE, $log, $log_nbytes;
230 $n_read == $log_nbytes
231 or die "$ME:$.: unexpected EOF\n";
233 # Extract leading hash.
234 my ($sha, $rest) = split ':', $log, 2;
236 or die "$ME:$.: malformed log entry\n";
237 $sha =~ /^[0-9a-fA-F]{40}$/
238 or die "$ME:$.: invalid SHA1: $sha\n";
240 # If this commit's log requires any transformation, do it now.
241 my $code = $amend_code->{$sha};
246 # Put the unpreprocessed entry into "$_".
249 # Let $code operate on it, safely.
250 my $r = $s->reval("$code")
251 or die "$ME:$.:$sha: failed to eval \"$code\":\n$@\n";
253 # Note that we've used this entry.
254 delete $amend_code->{$sha};
256 # Update $rest upon success.
260 my @line = split "\n", $rest;
261 my $author_line = shift @line;
263 or die "$ME:$.: unexpected EOF\n";
264 $author_line =~ /^(\d+) (.*>)$/
265 or die "$ME:$.: Invalid line "
266 . "(expected date/author/email):\n$author_line\n";
268 # Format 'Copyright-paperwork-exempt: Yes' as a standard ChangeLog
269 # `(tiny change)' annotation.
270 my $tiny = (grep (/^Copyright-paperwork-exempt:\s+[Yy]es$/, @line)
271 ? ' (tiny change)' : '');
273 my $date_line = sprintf "%s %s$tiny\n",
274 strftime ("%F", localtime ($1)), $2;
276 my @coauthors = grep /^Co-authored-by:.*$/, @line;
277 # Omit meta-data lines we've already interpreted.
278 @line = grep !/^(?:Signed-off-by:[ ].*>$
280 |Copyright-paperwork-exempt:[ ]
283 # Remove leading and trailing blank lines.
286 while ($line[0] =~ /^\s*$/) { shift @line; }
287 while ($line[$#line] =~ /^\s*$/) { pop @line; }
290 # Record whether there are two or more paragraphs.
291 my $multi_paragraph = grep /^\s*$/, @line;
293 # Format 'Co-authored-by: A U Thor <email@example.com>' lines in
294 # standard multi-author ChangeLog format.
297 s/^Co-authored-by:\s*/\t /;
301 or warn "$ME: warning: missing email address for "
302 . substr ($_, 5) . "\n";
305 # If this header would be different from the previous date/name/email/
306 # coauthors header, or if this or the previous entry consists of two
307 # or more paragraphs, then print the header.
308 if ($date_line ne $prev_date_line
309 or "@coauthors" ne "@prev_coauthors"
311 or $prev_multi_paragraph)
313 $prev_date_line eq ''
317 and print join ("\n", @coauthors), "\n";
319 $prev_date_line = $date_line;
320 @prev_coauthors = @coauthors;
321 $prev_multi_paragraph = $multi_paragraph;
323 # If there were any lines
326 warn "$ME: warning: empty commit message:\n $date_line\n";
332 # If the first line of the message has enough room, then
333 if (length $line[0] < 72)
335 # append a dot if there is no other punctuation or blank
337 $line[0] =~ /[[:punct:]\s]$/
342 # Prefix each non-empty line with a TAB.
343 @line = map { length $_ ? "\t$_" : '' } @line;
345 print "\n", join ("\n", @line), "\n";
348 defined ($in = <PIPE>)
351 and die "$ME:$.: unexpected line:\n$in";
355 or die "$ME: error closing pipe from " . quoted_cmd (@cmd) . "\n";
356 # FIXME-someday: include $PROCESS_STATUS in the diagnostic
358 # Complain about any unused entry in the --amend=F specified file.
360 foreach my $sha (keys %$amend_code)
362 warn "$ME:$amend_file: unused entry: $sha\n";
371 # indent-tabs-mode: nil
372 # eval: (add-hook 'write-file-hooks 'time-stamp)
373 # time-stamp-start: "my $VERSION = '"
374 # time-stamp-format: "%:y-%02m-%02d %02H:%02M"
375 # time-stamp-time-zone: "UTC"
376 # time-stamp-end: "'; # UTC"