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 = '2012-01-24 15:58 (wk)'; # 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
28 # Custom bugs bred by Werner Koch
33 use POSIX qw(strftime);
35 (my $ME = $0) =~ s|.*/||;
37 # use File::Coda; # http://meyering.net/code/Coda/
39 defined fileno STDOUT or return;
40 close STDOUT and return;
41 warn "$ME: failed to close standard output: $!\n";
48 my $STREAM = ($exit_code == 0 ? *STDOUT : *STDERR);
51 print $STREAM "Try `$ME --help' for more information.\n";
56 Usage: $ME [OPTIONS] [ARGS]
58 Convert git log output to ChangeLog format. If present, any ARGS
59 are passed to "git log". To avoid ARGS being parsed as options to
60 $ME, they may be preceded by '--'.
64 --amend=FILE FILE maps from an SHA1 to perl code (i.e., s/old/new/) that
65 makes a change to SHA1's commit log text or metadata.
66 --append-dot append a dot to the first line of each commit message if
67 there is no other punctuation or blank at the end.
68 --tear-off tear off all commit log lines after a '--' line and
69 skip log entry with the first body line being '--'.
70 --since=DATE convert only the logs since DATE;
71 the default is to convert all log entries.
72 --format=FMT set format string for commit subject and body;
73 see 'man git-log' for the list of format metacharacters;
74 the default is '%s%n%b%n'
76 --help display this help and exit
77 --version output version information and exit
81 $ME --since=2008-01-01 > ChangeLog
82 $ME -- -n 5 foo > last-5-commits-to-branch-foo
84 In a FILE specified via --amend, comment lines (starting with "#") are ignored.
85 FILE must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1 (alone on
86 a line) referring to a commit in the current project, and CODE refers to one
87 or more consecutive lines of Perl code. Pairs must be separated by one or
90 Here is sample input for use with --amend=FILE, from coreutils:
92 3a169f4c5d9159283548178668d2fae6fced3030
94 s/all tile types/all file types/
96 1379ed974f1fa39b12e2ffab18b3f7a607082202
97 # Due to a bug in vc-dwim, I mis-attributed a patch by Paul to myself.
98 # Change the author to be Paul. Note the escaped "@":
99 s,Jim .*>,Paul Eggert <eggert\@cs.ucla.edu>,
106 # If the string $S is a well-behaved file name, simply return it.
107 # If it contains white space, quotes, etc., quote it, and return the new string.
111 if ($s =~ m![^\w+/.,-]!)
113 # Convert each single quote to '\''
114 $s =~ s/\'/\'\\\'\'/g;
115 # Then single quote the string.
123 return join (' ', map {shell_quote $_} @_);
127 # Comment lines (starting with "#") are ignored.
128 # F must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1
129 # (alone on a line) referring to a commit in the current project, and
130 # CODE refers to one or more consecutive lines of Perl code.
131 # Pairs must be separated by one or more blank line.
132 sub parse_amend_file($)
137 or die "$ME: $f: failed to open for reading: $!\n";
143 while (defined (my $line = <F>))
149 and $in_code = 0, next;
153 $line =~ /^([0-9a-fA-F]{40})$/
154 or (warn "$ME: $f:$.: invalid line; expected an SHA1\n"),
159 and (warn "$ME: $f:$.: duplicate SHA1\n"),
165 $h->{$sha} .= "$line\n";
178 my $format_string = '%s%n%b%n';
185 help => sub { usage 0 },
186 version => sub { print "$ME version $VERSION\n"; exit },
187 'since=s' => \$since_date,
188 'format=s' => \$format_string,
189 'amend=s' => \$amend_file,
190 'append-dot' => \$append_dot,
191 'tear-off' => \$tear_off,
196 and unshift @ARGV, "--since=$since_date";
198 # This is a hash that maps an SHA1 to perl code (i.e., s/old/new/)
199 # that makes a correction in the log or attribution of that commit.
200 my $amend_code = defined $amend_file ? parse_amend_file $amend_file : {};
202 my @cmd = (qw (git log --log-size),
203 '--pretty=format:%H:%ct %an <%ae>%n%n'.$format_string, @ARGV);
204 open PIPE, '-|', @cmd
205 or die ("$ME: failed to run `". quoted_cmd (@cmd) ."': $!\n"
206 . "(Is your Git too old? Version 1.5.1 or later is required.)\n");
208 my $prev_date_line = '';
209 my @prev_coauthors = ();
213 defined (my $in = <PIPE>)
215 $in =~ /^log size (\d+)$/
216 or die "$ME:$.: Invalid line (expected log size):\n$in";
220 my $n_read = read PIPE, $log, $log_nbytes;
221 $n_read == $log_nbytes
222 or die "$ME:$.: unexpected EOF\n";
224 # Skip log entries with the default merge commit message.
225 $log =~ /^.*\n\nMerge branch '.*\n\s*/
228 # Skip log entries if the body starts with a tear off marker.
231 $log =~ /^.*\n\n.*\n--\s*/
235 # Extract leading hash.
236 my ($sha, $rest) = split ':', $log, 2;
238 or die "$ME:$.: malformed log entry\n";
239 $sha =~ /^[0-9a-fA-F]{40}$/
240 or die "$ME:$.: invalid SHA1: $sha\n";
242 # If this commit's log requires any transformation, do it now.
243 my $code = $amend_code->{$sha};
248 # Put the unpreprocessed entry into "$_".
251 # Let $code operate on it, safely.
252 my $r = $s->reval("$code")
253 or die "$ME:$.:$sha: failed to eval \"$code\":\n$@\n";
255 # Note that we've used this entry.
256 delete $amend_code->{$sha};
258 # Update $rest upon success.
262 my @line = split "\n", $rest;
263 my $author_line = shift @line;
265 or die "$ME:$.: unexpected EOF\n";
266 $author_line =~ /^(\d+) (.*>)$/
267 or die "$ME:$.: Invalid line "
268 . "(expected date/author/email):\n$author_line\n";
270 my $date_line = sprintf "%s $2\n", strftime ("%F", localtime ($1));
272 # Format 'Co-authored-by: A U Thor <email@example.com>' lines in
273 # standard multi-author ChangeLog format.
274 my @coauthors = grep /^Co-authored-by:.*$/, @line;
277 s/^Co-authored-by:\s*/\t /;
281 or warn "$ME: warning: missing email address for "
282 . substr ($_, 5) . "\n";
285 # If this header would be the same as the previous date/name/email/
286 # coauthors header, then arrange not to print it.
287 if ($date_line ne $prev_date_line or "@coauthors" ne "@prev_coauthors")
289 $prev_date_line eq ''
293 and print join ("\n", @coauthors), "\n";
295 $prev_date_line = $date_line;
296 @prev_coauthors = @coauthors;
298 # Omit keyword lines like "Signed-off-by:" or "GnuPG-bug-id:"
299 @line = grep !/^[A-Z][A-Za-z]+-[a-z-]+: /, @line;
301 # Remove everything after a line with 2 dashes at the beginning.
313 # Remove leading and trailing blank lines.
316 while ($line[0] =~ /^\s*$/) { shift @line; }
317 while ($line[$#line] =~ /^\s*$/) { pop @line; }
320 # If there were any lines
323 warn "$ME: warning: empty commit message:\n $date_line\n";
329 # If the first line of the message has enough room, then
330 if (length $line[0] < 72)
332 # append a dot if there is no other punctuation or blank
334 $line[0] =~ /[[:punct:]\s]$/
339 # Prefix each non-empty line with a TAB.
340 @line = map { length $_ ? "\t$_" : '' } @line;
342 $firstline = shift @line;
343 print "\n", $firstline, "\n", "\t+ commit $sha\n";
344 print join ("\n", @line), "\n";
348 defined ($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 (wk)"
375 # time-stamp-time-zone: "UTC"
376 # time-stamp-end: "'; # UTC"