1 #!/usr/bin/perl -w
2 #
3 # Tool to send git commit notifications
4 #
5 # Copyright 2005 Alexandre Julliard
6 # Copyright 2009 Nagios Plugins Development Team
7 #
8 # This program is free software; you can redistribute it and/or
9 # modify it under the terms of the GNU General Public License as
10 # published by the Free Software Foundation; either version 2 of
11 # the License, or (at your option) any later version.
12 #
13 #
14 # This script is meant to be called from .git/hooks/post-receive.
15 #
16 # Usage: git-notify [options] [--] old-sha1 new-sha1 refname
17 #
18 # -C Show committer in the body if different from the author
19 # -c name Send CIA notifications under specified project name
20 # -m addr Send mail notifications to specified address
21 # -n max Set max number of individual mails to send
22 # -r name Set the git repository name
23 # -s bytes Set the maximum diff size in bytes (-1 for no limit)
24 # -t file Prevent duplicate notifications by saving state to this file
25 # -U mask Set the umask for creating the state file
26 # -u url Set the URL to the gitweb browser
27 # -i branch If at least one -i is given, report only for specified branches
28 # -x branch Exclude changes to the specified branch from reports
29 # -X Exclude merge commits
30 #
32 use strict;
33 use Fcntl ':flock';
34 use Encode qw(encode decode);
35 use Cwd 'realpath';
37 sub git_config($);
38 sub get_repos_name();
40 # some parameters you may want to change
42 # set this to something that takes "-s"
43 my $mailer = "/usr/bin/mail";
45 # CIA notification address
46 my $cia_address = "cia\@cia.navi.cx";
48 # debug mode
49 my $debug = 0;
51 # configuration parameters
53 # show the committer if different from the author (can be set with the -C option)
54 my $show_committer = git_config( "notify.showcommitter" );
56 # base URL of the gitweb repository browser (can be set with the -u option)
57 my $gitweb_url = git_config( "notify.baseurl" );
59 # default repository name (can be changed with the -r option)
60 my $repos_name = git_config( "notify.repository" ) || get_repos_name();
62 # max size of diffs in bytes (can be changed with the -s option)
63 my $max_diff_size = git_config( "notify.maxdiff" ) || 10000;
65 # address for mail notices (can be set with -m option)
66 my $commitlist_address = git_config( "notify.mail" );
68 # project name for CIA notices (can be set with -c option)
69 my $cia_project_name = git_config( "notify.cia" );
71 # max number of individual notices before falling back to a single global notice (can be set with -n option)
72 my $max_individual_notices = git_config( "notify.maxnotices" ) || 100;
74 # branches to include
75 my @include_list = split /\s+/, git_config( "notify.include" ) || "";
77 # branches to exclude
78 my @exclude_list = split /\s+/, git_config( "notify.exclude" ) || "";
80 # the state file we use (can be set with the -t option)
81 my $state_file = git_config( "notify.statefile" );
83 # umask for creating the state file (can be set with -U option)
84 my $mode_mask = git_config( "notify.umask" ) || 002;
86 # Extra options to git rev-list
87 my @revlist_options;
89 sub usage()
90 {
91 print "Usage: $0 [options] [--] old-sha1 new-sha1 refname\n";
92 print " -C Show committer in the body if different from the author\n";
93 print " -c name Send CIA notifications under specified project name\n";
94 print " -m addr Send mail notifications to specified address\n";
95 print " -n max Set max number of individual mails to send\n";
96 print " -r name Set the git repository name\n";
97 print " -s bytes Set the maximum diff size in bytes (-1 for no limit)\n";
98 print " -t file Prevent duplicate notifications by saving state to this file\n";
99 print " -U mask Set the umask for creating the state file\n";
100 print " -u url Set the URL to the gitweb browser\n";
101 print " -i branch If at least one -i is given, report only for specified branches\n";
102 print " -x branch Exclude changes to the specified branch from reports\n";
103 print " -X Exclude merge commits\n";
104 exit 1;
105 }
107 sub xml_escape($)
108 {
109 my $str = shift;
110 $str =~ s/&/&/g;
111 $str =~ s/</</g;
112 $str =~ s/>/>/g;
113 my @chars = unpack "U*", $str;
114 $str = join "", map { ($_ > 127) ? sprintf "&#%u;", $_ : chr($_); } @chars;
115 return $str;
116 }
118 # execute git-rev-list(1) with the given parameters and return the output
119 sub git_rev_list(@)
120 {
121 my @args = @_;
122 my $revlist = [];
123 my $pid = open REVLIST, "-|";
125 die "Cannot open pipe: $!" if not defined $pid;
126 if (!$pid)
127 {
128 exec "git", "rev-list", @revlist_options, @args or die "Cannot execute rev-list: $!";
129 }
130 while (<REVLIST>)
131 {
132 chomp;
133 die "Invalid commit: $_" if not /^[0-9a-f]{40}$/;
134 push @$revlist, $_;
135 }
136 close REVLIST or die $! ? "Cannot execute rev-list: $!" : "rev-list exited with status: $?";
137 return $revlist;
138 }
140 # append the given commit hashes to the state file
141 sub save_commits($)
142 {
143 my $commits = shift;
145 open STATE, ">>", $state_file or die "Cannot open $state_file: $!";
146 flock STATE, LOCK_EX or die "Cannot lock $state_file";
147 print STATE "$_\n" for @$commits;
148 flock STATE, LOCK_UN or die "Cannot unlock $state_file";
149 close STATE or die "Cannot close $state_file: $!";
150 }
152 # for the given range, return the new hashes (and append them to the state file)
153 sub get_new_commits($$)
154 {
155 my ($old_sha1, $new_sha1) = @_;
156 my ($seen, @args);
157 my $newrevs = [];
159 @args = ( "^$old_sha1" ) unless $old_sha1 eq '0' x 40;
160 push @args, $new_sha1, @exclude_list;
162 my $revlist = git_rev_list(@args);
164 if (not defined $state_file or not -e $state_file)
165 {
166 save_commits(git_rev_list("--all", "--full-history")) if defined $state_file;
167 return $revlist;
168 }
170 open STATE, $state_file or die "Cannot open $state_file: $!";
171 flock STATE, LOCK_SH or die "Cannot lock $state_file";
172 while (<STATE>)
173 {
174 chomp;
175 die "Invalid commit: $_" if not /^[0-9a-f]{40}$/;
176 $seen->{$_} = 1;
177 }
178 flock STATE, LOCK_UN or die "Cannot unlock $state_file";
179 close STATE or die "Cannot close $state_file: $!";
181 # FIXME: if another git-notify process reads the $state_file at *this*
182 # point, that process might generate duplicates of our notifications.
184 save_commits($revlist);
186 foreach my $commit (@$revlist)
187 {
188 push @$newrevs, $commit unless $seen->{$commit};
189 }
190 return $newrevs;
191 }
193 # truncate the given string if it exceeds the specified number of characters
194 sub truncate_str($$)
195 {
196 my ($str, $max) = @_;
198 if (length($str) > $max)
199 {
200 $str = substr($str, 0, $max);
201 $str =~ s/\s+\S+$//;
202 $str .= " ...";
203 }
204 return $str;
205 }
207 # right-justify the left column of "left: right" elements, omit undefined elements
208 sub format_table(@)
209 {
210 my @lines = @_;
211 my @table;
212 my $max = 0;
214 foreach my $line (@lines)
215 {
216 next if not defined $line;
217 my $pos = index($line, ":");
219 $max = $pos if $pos > $max;
220 }
222 foreach my $line (@lines)
223 {
224 next if not defined $line;
225 my ($left, $right) = split(/: */, $line, 2);
227 push @table, (defined $left and defined $right)
228 ? sprintf("%*s: %s", $max + 1, $left, $right)
229 : $line;
230 }
231 return @table;
232 }
234 # format an integer date + timezone as string
235 # algorithm taken from git's date.c
236 sub format_date($$)
237 {
238 my ($time,$tz) = @_;
240 if ($tz < 0)
241 {
242 my $minutes = (-$tz / 100) * 60 + (-$tz % 100);
243 $time -= $minutes * 60;
244 }
245 else
246 {
247 my $minutes = ($tz / 100) * 60 + ($tz % 100);
248 $time += $minutes * 60;
249 }
250 return gmtime($time) . sprintf " %+05d", $tz;
251 }
253 # fetch a parameter from the git config file
254 sub git_config($)
255 {
256 my ($param) = @_;
258 open CONFIG, "-|" or exec "git", "config", $param;
259 my $ret = <CONFIG>;
260 chomp $ret if $ret;
261 close CONFIG or $ret = undef;
262 return $ret;
263 }
265 # parse command line options
266 sub parse_options()
267 {
268 while (@ARGV && $ARGV[0] =~ /^-/)
269 {
270 my $arg = shift @ARGV;
272 if ($arg eq '--') { last; }
273 elsif ($arg eq '-C') { $show_committer = 1; }
274 elsif ($arg eq '-c') { $cia_project_name = shift @ARGV; }
275 elsif ($arg eq '-m') { $commitlist_address = shift @ARGV; }
276 elsif ($arg eq '-n') { $max_individual_notices = shift @ARGV; }
277 elsif ($arg eq '-r') { $repos_name = shift @ARGV; }
278 elsif ($arg eq '-s') { $max_diff_size = shift @ARGV; }
279 elsif ($arg eq '-t') { $state_file = shift @ARGV; }
280 elsif ($arg eq '-U') { $mode_mask = shift @ARGV; }
281 elsif ($arg eq '-u') { $gitweb_url = shift @ARGV; }
282 elsif ($arg eq '-i') { push @include_list, shift @ARGV; }
283 elsif ($arg eq '-x') { push @exclude_list, shift @ARGV; }
284 elsif ($arg eq '-X') { push @revlist_options, "--no-merges"; }
285 elsif ($arg eq '-d') { $debug++; }
286 else { usage(); }
287 }
288 if (@ARGV && $#ARGV != 2) { usage(); }
289 @exclude_list = map { "^$_"; } @exclude_list;
290 }
292 # send an email notification
293 sub mail_notification($$$@)
294 {
295 my ($name, $subject, $content_type, @text) = @_;
296 $subject = encode("MIME-Q",$subject);
297 if ($debug)
298 {
299 binmode STDOUT, ":utf8";
300 print "---------------------\n";
301 print "To: $name\n";
302 print "Subject: $subject\n";
303 print "Content-Type: $content_type\n";
304 print "\n", join("\n", @text), "\n";
305 }
306 else
307 {
308 my $pid = open MAIL, "|-";
309 return unless defined $pid;
310 if (!$pid)
311 {
312 exec $mailer, "-s", $subject, "-a", "Content-Type: $content_type", $name or die "Cannot exec $mailer";
313 }
314 binmode MAIL, ":utf8";
315 print MAIL join("\n", @text), "\n";
316 close MAIL or warn $! ? "Cannot execute $mailer: $!" : "$mailer exited with status: $?";
317 }
318 }
320 # get the default repository name
321 sub get_repos_name()
322 {
323 my $dir = `git rev-parse --git-dir`;
324 chomp $dir;
325 my $repos = realpath($dir);
326 $repos =~ s/(.*?)((\.git\/)?\.git)$/$1/;
327 $repos =~ s/(.*)\/([^\/]+)\/?$/$2/;
328 return $repos;
329 }
331 # extract the information from a commit or tag object and return a hash containing the various fields
332 sub get_object_info($)
333 {
334 my $obj = shift;
335 my %info = ();
336 my @log = ();
337 my $do_log = 0;
339 $info{"encoding"} = "utf-8";
341 open TYPE, "-|" or exec "git", "cat-file", "-t", $obj or die "cannot run git-cat-file";
342 my $type = <TYPE>;
343 chomp $type;
344 close TYPE or die $! ? "Cannot execute cat-file: $!" : "cat-file exited with status: $?";
346 open OBJ, "-|" or exec "git", "cat-file", $type, $obj or die "cannot run git-cat-file";
347 while (<OBJ>)
348 {
349 chomp;
350 if ($do_log)
351 {
352 last if /^-----BEGIN PGP SIGNATURE-----/;
353 push @log, $_;
354 }
355 elsif (/^(author|committer|tagger) ((.*) (<.*>)) (\d+) ([+-]\d+)$/)
356 {
357 $info{$1} = $2;
358 $info{$1 . "_name"} = $3;
359 $info{$1 . "_email"} = $4;
360 $info{$1 . "_date"} = $5;
361 $info{$1 . "_tz"} = $6;
362 }
363 elsif (/^tag (.+)/)
364 {
365 $info{"tag"} = $1;
366 }
367 elsif (/^encoding (.+)/)
368 {
369 $info{"encoding"} = $1;
370 }
371 elsif (/^$/) { $do_log = 1; }
372 }
373 close OBJ or die $! ? "Cannot execute cat-file: $!" : "cat-file exited with status: $?";
375 $info{"type"} = $type;
376 $info{"log"} = \@log;
377 return %info;
378 }
380 # send a ref change notice to a mailing list
381 sub send_ref_notice($$@)
382 {
383 my ($ref, $action, @notice) = @_;
384 my ($reftype, $refname) = ($ref =~ /^refs\/(head|tag)s\/(.+)/);
386 $reftype =~ s/^head$/branch/;
388 @notice = (format_table(
389 "Module: $repos_name",
390 ($reftype eq "tag" ? "Tag:" : "Branch:") . $refname,
391 @notice,
392 ($action ne "removed" and $gitweb_url)
393 ? "URL: $gitweb_url/?a=shortlog;h=$ref" : undef),
394 "",
395 "The $refname $reftype has been $action.");
397 mail_notification($commitlist_address, "$refname $reftype $action",
398 "text/plain; charset=us-ascii", @notice);
399 }
401 # send a commit notice to a mailing list
402 sub send_commit_notice($$)
403 {
404 my ($ref,$obj) = @_;
405 my %info = get_object_info($obj);
406 my @notice = ();
407 my ($url,$subject);
409 if ($gitweb_url)
410 {
411 open REVPARSE, "-|" or exec "git", "rev-parse", "--short", $obj or die "cannot exec git-rev-parse";
412 my $short_obj = <REVPARSE>;
413 close REVPARSE or die $! ? "Cannot execute rev-parse: $!" : "rev-parse exited with status: $?";
415 $short_obj = $obj if not defined $short_obj;
416 chomp $short_obj;
417 $url = "$gitweb_url/?a=$info{type};h=$short_obj";
418 }
420 if ($info{"type"} eq "tag")
421 {
422 push @notice, format_table(
423 "Module: $repos_name",
424 "Branch: $ref",
425 "Tag: $obj",
426 "Tagger:" . $info{"tagger"},
427 "Date:" . format_date($info{"tagger_date"},$info{"tagger_tz"}),
428 $url ? "URL: $url" : undef),
429 "",
430 join "\n", @{$info{"log"}};
432 $subject = "Tag " . $info{"tag"} . ": " . $info{"tagger_name"};
433 }
434 else
435 {
436 push @notice, format_table(
437 "Module: $repos_name",
438 "Branch: $ref",
439 "Commit: $obj",
440 "Author:" . $info{"author"},
441 $show_committer && $info{"committer"} ne $info{"author"} ? "Committer:" . $info{"committer"} : undef,
442 "Date:" . format_date($info{"author_date"},$info{"author_tz"}),
443 $url ? "URL: $url" : undef),
444 "",
445 @{$info{"log"}},
446 "",
447 "---",
448 "";
450 open STAT, "-|" or exec "git", "diff-tree", "--stat", "-M", "--no-commit-id", $obj or die "cannot exec git-diff-tree";
451 push @notice, join("", <STAT>);
452 close STAT or die $! ? "Cannot execute diff-tree: $!" : "diff-tree exited with status: $?";
454 open DIFF, "-|" or exec "git", "diff-tree", "-p", "-M", "--no-commit-id", $obj or die "cannot exec git-diff-tree";
455 my $diff = join("", <DIFF>);
456 close DIFF or die $! ? "Cannot execute diff-tree: $!" : "diff-tree exited with status: $?";
458 if (($max_diff_size == -1) || (length($diff) < $max_diff_size))
459 {
460 push @notice, $diff;
461 }
462 else
463 {
464 push @notice, "Diff: $gitweb_url/?a=commitdiff;h=$obj" if $gitweb_url;
465 }
466 $subject = $info{"author_name"};
467 }
469 $subject .= ": " . truncate_str(${$info{"log"}}[0],50);
470 $_ = decode($info{"encoding"}, $_) for @notice;
471 mail_notification($commitlist_address, $subject, "text/plain; charset=UTF-8", @notice);
472 }
474 # send a commit notice to the CIA server
475 sub send_cia_notice($$)
476 {
477 my ($ref,$commit) = @_;
478 my %info = get_object_info($commit);
479 my @cia_text = ();
481 return if $info{"type"} ne "commit";
483 push @cia_text,
484 "<message>",
485 " <generator>",
486 " <name>git-notify script for CIA</name>",
487 " </generator>",
488 " <source>",
489 " <project>" . xml_escape($cia_project_name) . "</project>",
490 " <module>" . xml_escape($repos_name) . "</module>",
491 " <branch>" . xml_escape($ref). "</branch>",
492 " </source>",
493 " <body>",
494 " <commit>",
495 " <revision>" . substr($commit,0,10) . "</revision>",
496 " <author>" . xml_escape($info{"author"}) . "</author>",
497 " <log>" . xml_escape(join "\n", @{$info{"log"}}) . "</log>",
498 " <files>";
500 open COMMIT, "-|" or exec "git", "diff-tree", "--name-status", "-r", "-M", $commit or die "cannot run git-diff-tree";
501 while (<COMMIT>)
502 {
503 chomp;
504 if (/^([AMD])\t(.*)$/)
505 {
506 my ($action, $file) = ($1, $2);
507 my %actions = ( "A" => "add", "M" => "modify", "D" => "remove" );
508 next unless defined $actions{$action};
509 push @cia_text, " <file action=\"$actions{$action}\">" . xml_escape($file) . "</file>";
510 }
511 elsif (/^R\d+\t(.*)\t(.*)$/)
512 {
513 my ($old, $new) = ($1, $2);
514 push @cia_text, " <file action=\"rename\" to=\"" . xml_escape($new) . "\">" . xml_escape($old) . "</file>";
515 }
516 }
517 close COMMIT or die $! ? "Cannot execute diff-tree: $!" : "diff-tree exited with status: $?";
519 push @cia_text,
520 " </files>",
521 $gitweb_url ? " <url>" . xml_escape("$gitweb_url/?a=commit;h=$commit") . "</url>" : "",
522 " </commit>",
523 " </body>",
524 " <timestamp>" . $info{"author_date"} . "</timestamp>",
525 "</message>";
527 mail_notification($cia_address, "DeliverXML", "text/xml", @cia_text);
528 }
530 # send a global commit notice when there are too many commits for individual mails
531 sub send_global_notice($$$)
532 {
533 my ($ref, $old_sha1, $new_sha1) = @_;
534 my $notice = git_rev_list("--pretty", "^$old_sha1", "$new_sha1", @exclude_list);
536 foreach my $rev (@$notice)
537 {
538 $rev =~ s/^commit /URL: $gitweb_url\/?a=commit;h=/ if $gitweb_url;
539 }
541 mail_notification($commitlist_address, "New commits on branch $ref", "text/plain; charset=UTF-8", @$notice);
542 }
544 # send all the notices
545 sub send_all_notices($$$)
546 {
547 my ($old_sha1, $new_sha1, $ref) = @_;
548 my ($reftype, $refname, $action, @notice);
550 return if ($ref =~ /^refs\/remotes\//
551 or (@include_list && !grep {$_ eq $ref} @include_list));
552 die "The name \"$ref\" doesn't sound like a local branch or tag"
553 if not (($reftype, $refname) = ($ref =~ /^refs\/(head|tag)s\/(.+)/));
555 if ($new_sha1 eq '0' x 40)
556 {
557 $action = "removed";
558 @notice = ( "Old SHA1: $old_sha1" );
559 }
560 elsif ($old_sha1 eq '0' x 40)
561 {
562 $action = "created";
563 @notice = ( "SHA1: $new_sha1" );
564 }
565 elsif ($reftype eq "tag")
566 {
567 $action = "updated";
568 @notice = ( "Old SHA1: $old_sha1", "New SHA1: $new_sha1" );
569 }
570 elsif (not grep( $_ eq $old_sha1, @{ git_rev_list( $new_sha1, "--full-history" ) } ))
571 {
572 $action = "rewritten";
573 @notice = ( "Old SHA1: $old_sha1", "New SHA1: $new_sha1" );
574 }
576 send_ref_notice( $ref, $action, @notice ) if ($commitlist_address and $action);
578 unless ($reftype eq "tag" or $new_sha1 eq '0' x 40)
579 {
580 my $commits = get_new_commits ( $old_sha1, $new_sha1 );
582 if (@$commits > $max_individual_notices)
583 {
584 send_global_notice( $refname, $old_sha1, $new_sha1 ) if $commitlist_address;
585 }
586 elsif (@$commits > 0)
587 {
588 foreach my $commit (@$commits)
589 {
590 send_commit_notice( $refname, $commit ) if $commitlist_address;
591 send_cia_notice( $refname, $commit ) if $cia_project_name;
592 }
593 }
594 elsif ($commitlist_address)
595 {
596 @notice = ( "Old SHA1: $old_sha1", "New SHA1: $new_sha1" );
597 send_ref_notice( $ref, "modified", @notice );
598 }
599 }
600 }
602 parse_options();
604 umask( $mode_mask );
606 # append repository path to URL
607 $gitweb_url .= "/$repos_name.git" if $gitweb_url;
609 if (@ARGV)
610 {
611 send_all_notices( $ARGV[0], $ARGV[1], $ARGV[2] );
612 }
613 else # read them from stdin
614 {
615 while (<>)
616 {
617 chomp;
618 if (/^([0-9a-f]{40}) ([0-9a-f]{40}) (.*)$/) { send_all_notices( $1, $2, $3 ); }
619 }
620 }
622 exit 0;