summaryrefslogtreecommitdiffstats
path: root/tools/git-notify
blob: b10b1bc4d44ca850c76c8a81d73cadad8dff0989 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
#!/usr/bin/perl -w
#
# Tool to send git commit notifications
#
# Copyright 2005 Alexandre Julliard
# Copyright 2009 Nagios Plugins Development Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
#
# This script is meant to be called from .git/hooks/post-receive.
#
# Usage: git-notify [options] [--] old-sha1 new-sha1 refname
#
#   -c name   Send CIA notifications under specified project name
#   -m addr   Send mail notifications to specified address
#   -n max    Set max number of individual mails to send
#   -r name   Set the git repository name
#   -s bytes  Set the maximum diff size in bytes (-1 for no limit)
#   -t file   Set the file to use for reading and saving state
#   -u url    Set the URL to the gitweb browser
#   -i branch If at least one -i is given, report only for specified branches
#   -x branch Exclude changes to the specified branch from reports
#   -X        Exclude merge commits
#

use strict;
use Fcntl ':flock';
use Encode qw(encode decode);
use Cwd 'realpath';

sub git_config($);
sub get_repos_name();

# some parameters you may want to change

# set this to something that takes "-s"
my $mailer = "/usr/bin/mail";

# CIA notification address
my $cia_address = "cia\@cia.navi.cx";

# debug mode
my $debug = 0;

# number of generated (non-CIA) notifications
my $sent_notices = 0;

# configuration parameters

# base URL of the gitweb repository browser (can be set with the -u option)
my $gitweb_url = git_config( "notify.baseurl" );

# default repository name (can be changed with the -r option)
my $repos_name = git_config( "notify.repository" ) || get_repos_name();

# max size of diffs in bytes (can be changed with the -s option)
my $max_diff_size = git_config( "notify.maxdiff" ) || 10000;

# address for mail notices (can be set with -m option)
my $commitlist_address = git_config( "notify.mail" );

# project name for CIA notices (can be set with -c option)
my $cia_project_name = git_config( "notify.cia" );

# max number of individual notices before falling back to a single global notice (can be set with -n option)
my $max_individual_notices = git_config( "notify.maxnotices" ) || 100;

# branches to include
my @include_list = split /\s+/, git_config( "notify.include" ) || "";

# branches to exclude
my @exclude_list = split /\s+/, git_config( "notify.exclude" ) || "";

# the state file we use (can be changed with the -t option)
my $state_file = git_config( "notify.statefile" ) || "/var/tmp/git-notify.state";

# Extra options to git rev-list
my @revlist_options;

sub usage()
{
    print "Usage: $0 [options] [--] old-sha1 new-sha1 refname\n";
    print "   -c name   Send CIA notifications under specified project name\n";
    print "   -m addr   Send mail notifications to specified address\n";
    print "   -n max    Set max number of individual mails to send\n";
    print "   -r name   Set the git repository name\n";
    print "   -s bytes  Set the maximum diff size in bytes (-1 for no limit)\n";
    print "   -t file   Set the file to use for reading and saving state\n";
    print "   -u url    Set the URL to the gitweb browser\n";
    print "   -i branch If at least one -i is given, report only for specified branches\n";
    print "   -x branch Exclude changes to the specified branch from reports\n";
    print "   -X        Exclude merge commits\n";
    exit 1;
}

sub xml_escape($)
{
    my $str = shift;
    $str =~ s/&/&/g;
    $str =~ s/</&lt;/g;
    $str =~ s/>/&gt;/g;
    my @chars = unpack "U*", $str;
    $str = join "", map { ($_ > 127) ? sprintf "&#%u;", $_ : chr($_); } @chars;
    return $str;
}

# execute git-rev-list(1) with the given parameters and return the output
sub git_rev_list(@)
{
    my @args = @_;
    my $revlist = [];
    my $pid = open REVLIST, "-|";

    die "Cannot open pipe: $!" if not defined $pid;
    if (!$pid)
    {
        exec "git", "rev-list", @revlist_options, @args or die "Cannot execute rev-list: $!";
    }
    while (<REVLIST>)
    {
        chomp;
        die "Invalid commit: $_" if not /^[0-9a-f]{40}$/;
        push @$revlist, $_;
    }
    close REVLIST or die $! ? "Cannot execute rev-list: $!" : "rev-list exited with status: $?";
    return $revlist;
}

# append the given commit hashes to the state file
sub save_commits($)
{
    my $commits = shift;

    open STATE, ">>", $state_file or die "Cannot open $state_file: $!";
    flock STATE, LOCK_EX or die "Cannot lock $state_file";
    print STATE "$_\n" for @$commits;
    flock STATE, LOCK_UN or die "Cannot unlock $state_file";
    close STATE or die "Cannot close $state_file: $!";
}

# for the given range, return the new hashes and append them to the state file
sub get_new_commits($$)
{
    my ($old_sha1, $new_sha1) = @_;
    my ($seen, @args);
    my $newrevs = [];

    @args = ( "^$old_sha1" ) unless $old_sha1 eq '0' x 40;
    push @args, $new_sha1, @exclude_list;

    my $revlist = git_rev_list(@args);

    if (not -e $state_file)  # initialize the state file with all hashes
    {
        save_commits(git_rev_list("--all", "--full-history"));
        return $revlist;
    }

    open STATE, $state_file or die "Cannot open $state_file: $!";
    flock STATE, LOCK_SH or die "Cannot lock $state_file";
    while (<STATE>)
    {
        chomp;
        die "Invalid commit: $_" if not /^[0-9a-f]{40}$/;
        $seen->{$_} = 1;
    }
    flock STATE, LOCK_UN or die "Cannot unlock $state_file";
    close STATE or die "Cannot close $state_file: $!";

    # FIXME: if another git-notify process reads the $state_file at *this*
    # point, that process might generate duplicates of our notifications.

    save_commits($revlist);

    foreach my $commit (@$revlist)
    {
        push @$newrevs, $commit unless $seen->{$commit};
    }
    return $newrevs;
}

# truncate the given string if it exceeds the specified number of characters
sub truncate_str($$)
{
    my ($str, $max) = @_;

    if (length($str) > $max)
    {
        $str = substr($str, 0, $max);
        $str =~ s/\s+\S+$//;
        $str .= " ...";
    }
    return $str;
}

# right-justify the left column of "left: right" elements, omit undefined elements
sub format_table(@)
{
    my @lines = @_;
    my @table;
    my $max = 0;

    foreach my $line (@lines)
    {
       next if not defined $line;
       my $pos = index($line, ":");

       $max = $pos if $pos > $max;
    }

    foreach my $line (@lines)
    {
       next if not defined $line;
       my ($left, $right) = split(/: */, $line, 2);

       push @table, (defined $left and defined $right)
           ? sprintf("%*s: %s", $max + 1, $left, $right)
           : $line;
    }
    return @table;
}

# return the gitweb URL of the given commit or undef
sub gitweb_url($$)
{
}

# format an integer date + timezone as string
# algorithm taken from git's date.c
sub format_date($$)
{
    my ($time,$tz) = @_;

    if ($tz < 0)
    {
        my $minutes = (-$tz / 100) * 60 + (-$tz % 100);
        $time -= $minutes * 60;
    }
    else
    {
        my $minutes = ($tz / 100) * 60 + ($tz % 100);
        $time += $minutes * 60;
    }
    return gmtime($time) . sprintf " %+05d", $tz;
}

# fetch a parameter from the git config file
sub git_config($)
{
    my ($param) = @_;

    open CONFIG, "-|" or exec "git", "config", $param;
    my $ret = <CONFIG>;
    chomp $ret if $ret;
    close CONFIG or $ret = undef;
    return $ret;
}

# parse command line options
sub parse_options()
{
    while (@ARGV && $ARGV[0] =~ /^-/)
    {
        my $arg = shift @ARGV;

        if ($arg eq '--') { last; }
        elsif ($arg eq '-c') { $cia_project_name = shift @ARGV; }
        elsif ($arg eq '-m') { $commitlist_address = shift @ARGV; }
        elsif ($arg eq '-n') { $max_individual_notices = shift @ARGV; }
        elsif ($arg eq '-r') { $repos_name = shift @ARGV; }
        elsif ($arg eq '-s') { $max_diff_size = shift @ARGV; }
        elsif ($arg eq '-t') { $state_file = shift @ARGV; }
        elsif ($arg eq '-u') { $gitweb_url = shift @ARGV; }
        elsif ($arg eq '-i') { push @include_list, shift @ARGV; }
        elsif ($arg eq '-x') { push @exclude_list, shift @ARGV; }
        elsif ($arg eq '-X') { push @revlist_options, "--no-merges"; }
        elsif ($arg eq '-d') { $debug++; }
        else { usage(); }
    }
    if (@ARGV && $#ARGV != 2) { usage(); }
    @exclude_list = map { "^$_"; } @exclude_list;
}

# send an email notification
sub mail_notification($$$@)
{
    my ($name, $subject, $content_type, @text) = @_;
    $subject = encode("MIME-Q",$subject);
    if ($debug)
    {
        binmode STDOUT, ":utf8";
        print "---------------------\n";
        print "To: $name\n";
        print "Subject: $subject\n";
        print "Content-Type: $content_type\n";
        print "\n", join("\n", @text), "\n";
    }
    else
    {
        my $pid = open MAIL, "|-";
        return unless defined $pid;
        if (!$pid)
        {
            exec $mailer, "-s", $subject, "-a", "Content-Type: $content_type", $name or die "Cannot exec $mailer";
        }
        binmode MAIL, ":utf8";
        print MAIL join("\n", @text), "\n";
        close MAIL;
    }
}

# get the default repository name
sub get_repos_name()
{
    my $dir = `git rev-parse --git-dir`;
    chomp $dir;
    my $repos = realpath($dir);
    $repos =~ s/(.*?)((\.git\/)?\.git)$/$1/;
    $repos =~ s/(.*)\/([^\/]+)\/?$/$2/;
    return $repos;
}

# extract the information from a commit object and return a hash containing the various fields
sub get_object_info($)
{
    my $obj = shift;
    my %info = ();
    my @log = ();
    my $do_log = 0;

    $info{"encoding"} = "utf-8";

    open OBJ, "-|" or exec "git", "cat-file", "commit", $obj or die "cannot run git-cat-file";
    while (<OBJ>)
    {
        chomp;
        if ($do_log) { push @log, $_; }
        elsif (/^$/) { $do_log = 1; }
        elsif (/^encoding (.+)/) { $info{"encoding"} = $1; }
        elsif (/^(author|committer) ((.*) (<.*>)) (\d+) ([+-]\d+)$/)
        {
            $info{$1} = $2;
            $info{$1 . "_name"} = $3;
            $info{$1 . "_email"} = $4;
            $info{$1 . "_date"} = $5;
            $info{$1 . "_tz"} = $6;
        }
    }
    close OBJ;

    $info{"log"} = \@log;
    return %info;
}

# send a ref change notice to a mailing list
sub send_ref_notice($$@)
{
    my ($ref, $action, @notice) = @_;
    my ($reftype, $refname) = ($ref =~ /^refs\/(head|tag)s\/(.+)/);

    $reftype =~ s/^head$/branch/;

    @notice = (format_table(
        "Module: $repos_name",
        ($reftype eq "tag" ? "Tag:" : "Branch:") . $refname,
        @notice,
        ($action ne "removed" and $gitweb_url)
            ? "URL: $gitweb_url/?a=shortlog;h=$ref" : undef),
        "",
        "The $refname $reftype has been $action.");

    mail_notification($commitlist_address, "$refname $reftype $action",
        "text/plain; charset=us-ascii", @notice);
    $sent_notices++;
}

# send a commit notice to a mailing list
sub send_commit_notice($$)
{
    my ($ref,$obj) = @_;
    my %info = get_object_info($obj);
    my @notice = ();
    my $url;

    open DIFF, "-|" or exec "git", "diff-tree", "-p", "-M", "--no-commit-id", $obj or die "cannot exec git-diff-tree";
    my $diff = join("", <DIFF>);
    close DIFF;

    return if length($diff) == 0;

    if ($gitweb_url)
    {
        open REVPARSE, "-|" or exec "git", "rev-parse", "--short", $obj or die "cannot exec git-rev-parse";
        my $short_obj = <REVPARSE>;
        close REVPARSE or die $! ? "Cannot execute rev-parse: $!" : "rev-parse exited with status: $?";

        $short_obj = $obj if not defined $short_obj;
        chomp $short_obj;
        $url = "$gitweb_url/?a=commit;h=$short_obj";
    }

    push @notice, format_table(
        "Module: $repos_name",
        "Branch: $ref",
        "Commit: $obj",
        "Author:" . $info{"author"},
        $info{"committer"} ne $info{"author"} ? "Committer:" . $info{"committer"} : undef,
        "Date:" . format_date($info{"author_date"},$info{"author_tz"}),
        $url ? "URL: $url" : undef),
        "",
        @{$info{"log"}},
        "",
        "---",
        "";

    open STAT, "-|" or exec "git", "diff-tree", "--stat", "-M", "--no-commit-id", $obj or die "cannot exec git-diff-tree";
    push @notice, join("", <STAT>);
    close STAT;

    if (($max_diff_size == -1) || (length($diff) < $max_diff_size))
    {
        push @notice, $diff;
    }
    else
    {
        push @notice, "Diff:   $gitweb_url/?a=commitdiff;h=$obj" if $gitweb_url;
    }

    $_ = decode($info{"encoding"}, $_) for @notice;

    mail_notification($commitlist_address,
        $info{"author_name"} . ": " . truncate_str(${$info{"log"}}[0], 50),
        "text/plain; charset=UTF-8", @notice);
    $sent_notices++;
}

# send a commit notice to the CIA server
sub send_cia_notice($$)
{
    my ($ref,$commit) = @_;
    my %info = get_object_info($commit);
    my @cia_text = ();

    push @cia_text,
        "<message>",
        "  <generator>",
        "    <name>git-notify script for CIA</name>",
        "  </generator>",
        "  <source>",
        "    <project>" . xml_escape($cia_project_name) . "</project>",
        "    <module>" . xml_escape($repos_name) . "</module>",
        "    <branch>" . xml_escape($ref). "</branch>",
        "  </source>",
        "  <body>",
        "    <commit>",
        "      <revision>" . substr($commit,0,10) . "</revision>",
        "      <author>" . xml_escape($info{"author"}) . "</author>",
        "      <log>" . xml_escape(join "\n", @{$info{"log"}}) . "</log>",
        "      <files>";

    open COMMIT, "-|" or exec "git", "diff-tree", "--name-status", "-r", "-M", $commit or die "cannot run git-diff-tree";
    while (<COMMIT>)
    {
        chomp;
        if (/^([AMD])\t(.*)$/)
        {
            my ($action, $file) = ($1, $2);
            my %actions = ( "A" => "add", "M" => "modify", "D" => "remove" );
            next unless defined $actions{$action};
            push @cia_text, "        <file action=\"$actions{$action}\">" . xml_escape($file) . "</file>";
        }
        elsif (/^R\d+\t(.*)\t(.*)$/)
        {
            my ($old, $new) = ($1, $2);
            push @cia_text, "        <file action=\"rename\" to=\"" . xml_escape($new) . "\">" . xml_escape($old) . "</file>";
        }
    }
    close COMMIT;

    push @cia_text,
        "      </files>",
        $gitweb_url ? "      <url>" . xml_escape("$gitweb_url/?a=commit;h=$commit") . "</url>" : "",
        "    </commit>",
        "  </body>",
        "  <timestamp>" . $info{"author_date"} . "</timestamp>",
        "</message>";

    mail_notification($cia_address, "DeliverXML", "text/xml", @cia_text);
}

# send a global commit notice when there are too many commits for individual mails
sub send_global_notice($$$)
{
    my ($ref, $old_sha1, $new_sha1) = @_;
    my $notice = git_rev_list("--pretty", "^$old_sha1", "$new_sha1", @exclude_list);

    foreach my $rev (@$notice)
    {
        $rev =~ s/^commit /URL:    $gitweb_url\/?a=commit;h=/ if $gitweb_url;
    }

    mail_notification($commitlist_address, "New commits on branch $ref", "text/plain; charset=UTF-8", @$notice);
    $sent_notices++;
}

# send all the notices
sub send_all_notices($$$)
{
    my ($old_sha1, $new_sha1, $ref) = @_;
    my ($reftype, $refname, $action, @notice);

    return if ($ref =~ /^refs\/remotes\//
        or (@include_list && !grep {$_ eq $ref} @include_list));
    die "The name \"$ref\" doesn't sound like a local branch or tag"
        if not (($reftype, $refname) = ($ref =~ /^refs\/(head|tag)s\/(.+)/));

    if ($new_sha1 eq '0' x 40)
    {
        $action = "removed";
        @notice = ( "Old SHA1: $old_sha1" );
    }
    elsif ($old_sha1 eq '0' x 40)
    {
        $action = "created";
        @notice = ( "SHA1: $new_sha1" );
    }
    elsif ($reftype eq "tag")
    {
        $action = "updated";
        @notice = ( "Old SHA1: $old_sha1", "New SHA1: $new_sha1" );
    }
    elsif (not grep( $_ eq $old_sha1, @{ git_rev_list( $new_sha1, "--full-history" ) } ))
    {
        $action = "rewritten";
        @notice = ( "Old SHA1: $old_sha1", "New SHA1: $new_sha1" );
    }

    send_ref_notice( $ref, $action, @notice ) if ($commitlist_address and $action);

    unless ($reftype eq "tag" or $new_sha1 eq '0' x 40)
    {
        my $commits = get_new_commits ( $old_sha1, $new_sha1 );

        if (@$commits > $max_individual_notices)
        {
            send_global_notice( $refname, $old_sha1, $new_sha1 ) if $commitlist_address;
        }
        else
        {
            foreach my $commit (@$commits)
            {
                send_commit_notice( $refname, $commit ) if $commitlist_address;
                send_cia_notice( $refname, $commit ) if $cia_project_name;
            }
        }
        if ($sent_notices == 0 and $commitlist_address)
        {
            @notice = ( "Old SHA1: $old_sha1", "New SHA1: $new_sha1" );
            send_ref_notice( $ref, "modified", @notice );
        }
    }
}

parse_options();

# append repository path to URL
$gitweb_url .= "/$repos_name.git" if $gitweb_url;

if (@ARGV)
{
    send_all_notices( $ARGV[0], $ARGV[1], $ARGV[2] );
}
else  # read them from stdin
{
    while (<>)
    {
        chomp;
        if (/^([0-9a-f]{40}) ([0-9a-f]{40}) (.*)$/) { send_all_notices( $1, $2, $3 ); }
    }
}

exit 0;