Merge branch 'da/maint-python-startup' into maint
[git] / git-send-email.perl
1 #!/usr/bin/perl -w
2 #
3 # Copyright 2002,2005 Greg Kroah-Hartman <greg@kroah.com>
4 # Copyright 2005 Ryan Anderson <ryan@michonline.com>
5 #
6 # GPL v2 (See COPYING)
7 #
8 # Ported to support git "mbox" format files by Ryan Anderson <ryan@michonline.com>
9 #
10 # Sends a collection of emails to the given email addresses, disturbingly fast.
11 #
12 # Supports two formats:
13 # 1. mbox format files (ignoring most headers and MIME formatting - this is designed for sending patches)
14 # 2. The original format support by Greg's script:
15 #    first line of the message is who to CC,
16 #    and second line is the subject of the message.
17 #
18
19 use strict;
20 use warnings;
21 use Term::ReadLine;
22 use Getopt::Long;
23 use Text::ParseWords;
24 use Data::Dumper;
25 use Term::ANSIColor;
26 use File::Temp qw/ tempdir tempfile /;
27 use Error qw(:try);
28 use Git;
29
30 Getopt::Long::Configure qw/ pass_through /;
31
32 package FakeTerm;
33 sub new {
34         my ($class, $reason) = @_;
35         return bless \$reason, shift;
36 }
37 sub readline {
38         my $self = shift;
39         die "Cannot use readline on FakeTerm: $$self";
40 }
41 package main;
42
43
44 sub usage {
45         print <<EOT;
46 git send-email [options] <file | directory | rev-list options >
47
48   Composing:
49     --from                  <str>  * Email From:
50     --to                    <str>  * Email To:
51     --cc                    <str>  * Email Cc:
52     --bcc                   <str>  * Email Bcc:
53     --subject               <str>  * Email "Subject:"
54     --in-reply-to           <str>  * Email "In-Reply-To:"
55     --annotate                     * Review each patch that will be sent in an editor.
56     --compose                      * Open an editor for introduction.
57
58   Sending:
59     --envelope-sender       <str>  * Email envelope sender.
60     --smtp-server       <str:int>  * Outgoing SMTP server to use. The port
61                                      is optional. Default 'localhost'.
62     --smtp-server-port      <int>  * Outgoing SMTP server port.
63     --smtp-user             <str>  * Username for SMTP-AUTH.
64     --smtp-pass             <str>  * Password for SMTP-AUTH; not necessary.
65     --smtp-encryption       <str>  * tls or ssl; anything else disables.
66     --smtp-ssl                     * Deprecated. Use '--smtp-encryption ssl'.
67
68   Automating:
69     --identity              <str>  * Use the sendemail.<id> options.
70     --cc-cmd                <str>  * Email Cc: via `<str> \$patch_path`
71     --suppress-cc           <str>  * author, self, sob, cc, cccmd, body, bodycc, all.
72     --[no-]signed-off-by-cc        * Send to Signed-off-by: addresses. Default on.
73     --[no-]suppress-from           * Send to self. Default off.
74     --[no-]chain-reply-to          * Chain In-Reply-To: fields. Default off.
75     --[no-]thread                  * Use In-Reply-To: field. Default on.
76
77   Administering:
78     --confirm               <str>  * Confirm recipients before sending;
79                                      auto, cc, compose, always, or never.
80     --quiet                        * Output one line of info per email.
81     --dry-run                      * Don't actually send the emails.
82     --[no-]validate                * Perform patch sanity checks. Default on.
83     --[no-]format-patch            * understand any non optional arguments as
84                                      `git format-patch` ones.
85
86 EOT
87         exit(1);
88 }
89
90 # most mail servers generate the Date: header, but not all...
91 sub format_2822_time {
92         my ($time) = @_;
93         my @localtm = localtime($time);
94         my @gmttm = gmtime($time);
95         my $localmin = $localtm[1] + $localtm[2] * 60;
96         my $gmtmin = $gmttm[1] + $gmttm[2] * 60;
97         if ($localtm[0] != $gmttm[0]) {
98                 die "local zone differs from GMT by a non-minute interval\n";
99         }
100         if ((($gmttm[6] + 1) % 7) == $localtm[6]) {
101                 $localmin += 1440;
102         } elsif ((($gmttm[6] - 1) % 7) == $localtm[6]) {
103                 $localmin -= 1440;
104         } elsif ($gmttm[6] != $localtm[6]) {
105                 die "local time offset greater than or equal to 24 hours\n";
106         }
107         my $offset = $localmin - $gmtmin;
108         my $offhour = $offset / 60;
109         my $offmin = abs($offset % 60);
110         if (abs($offhour) >= 24) {
111                 die ("local time offset greater than or equal to 24 hours\n");
112         }
113
114         return sprintf("%s, %2d %s %d %02d:%02d:%02d %s%02d%02d",
115                        qw(Sun Mon Tue Wed Thu Fri Sat)[$localtm[6]],
116                        $localtm[3],
117                        qw(Jan Feb Mar Apr May Jun
118                           Jul Aug Sep Oct Nov Dec)[$localtm[4]],
119                        $localtm[5]+1900,
120                        $localtm[2],
121                        $localtm[1],
122                        $localtm[0],
123                        ($offset >= 0) ? '+' : '-',
124                        abs($offhour),
125                        $offmin,
126                        );
127 }
128
129 my $have_email_valid = eval { require Email::Valid; 1 };
130 my $have_mail_address = eval { require Mail::Address; 1 };
131 my $smtp;
132 my $auth;
133
134 sub unique_email_list(@);
135 sub cleanup_compose_files();
136
137 # Variables we fill in automatically, or via prompting:
138 my (@to,@cc,@initial_cc,@bcclist,@xh,
139         $initial_reply_to,$initial_subject,@files,
140         $author,$sender,$smtp_authpass,$annotate,$compose,$time);
141
142 my $envelope_sender;
143
144 # Example reply to:
145 #$initial_reply_to = ''; #<20050203173208.GA23964@foobar.com>';
146
147 my $repo = eval { Git->repository() };
148 my @repo = $repo ? ($repo) : ();
149 my $term = eval {
150         $ENV{"GIT_SEND_EMAIL_NOTTY"}
151                 ? new Term::ReadLine 'git-send-email', \*STDIN, \*STDOUT
152                 : new Term::ReadLine 'git-send-email';
153 };
154 if ($@) {
155         $term = new FakeTerm "$@: going non-interactive";
156 }
157
158 # Behavior modification variables
159 my ($quiet, $dry_run) = (0, 0);
160 my $format_patch;
161 my $compose_filename;
162
163 # Handle interactive edition of files.
164 my $multiedit;
165 my $editor;
166
167 sub do_edit {
168         if (!defined($editor)) {
169                 $editor = Git::command_oneline('var', 'GIT_EDITOR');
170         }
171         if (defined($multiedit) && !$multiedit) {
172                 map {
173                         system('sh', '-c', $editor.' "$@"', $editor, $_);
174                         if (($? & 127) || ($? >> 8)) {
175                                 die("the editor exited uncleanly, aborting everything");
176                         }
177                 } @_;
178         } else {
179                 system('sh', '-c', $editor.' "$@"', $editor, @_);
180                 if (($? & 127) || ($? >> 8)) {
181                         die("the editor exited uncleanly, aborting everything");
182                 }
183         }
184 }
185
186 # Variables with corresponding config settings
187 my ($thread, $chain_reply_to, $suppress_from, $signed_off_by_cc, $cc_cmd);
188 my ($smtp_server, $smtp_server_port, $smtp_authuser, $smtp_encryption);
189 my ($identity, $aliasfiletype, @alias_files, @smtp_host_parts);
190 my ($validate, $confirm);
191 my (@suppress_cc);
192
193 my $not_set_by_user = "true but not set by the user";
194
195 my %config_bool_settings = (
196     "thread" => [\$thread, 1],
197     "chainreplyto" => [\$chain_reply_to, $not_set_by_user],
198     "suppressfrom" => [\$suppress_from, undef],
199     "signedoffbycc" => [\$signed_off_by_cc, undef],
200     "signedoffcc" => [\$signed_off_by_cc, undef],      # Deprecated
201     "validate" => [\$validate, 1],
202 );
203
204 my %config_settings = (
205     "smtpserver" => \$smtp_server,
206     "smtpserverport" => \$smtp_server_port,
207     "smtpuser" => \$smtp_authuser,
208     "smtppass" => \$smtp_authpass,
209     "to" => \@to,
210     "cc" => \@initial_cc,
211     "cccmd" => \$cc_cmd,
212     "aliasfiletype" => \$aliasfiletype,
213     "bcc" => \@bcclist,
214     "aliasesfile" => \@alias_files,
215     "suppresscc" => \@suppress_cc,
216     "envelopesender" => \$envelope_sender,
217     "multiedit" => \$multiedit,
218     "confirm"   => \$confirm,
219     "from" => \$sender,
220 );
221
222 # Help users prepare for 1.7.0
223 sub chain_reply_to {
224         if (defined $chain_reply_to &&
225             $chain_reply_to eq $not_set_by_user) {
226                 print STDERR
227                     "In git 1.7.0, the default has changed to --no-chain-reply-to\n" .
228                     "Set sendemail.chainreplyto configuration variable to true if\n" .
229                     "you want to keep --chain-reply-to as your default.\n";
230                 $chain_reply_to = 0;
231         }
232         return $chain_reply_to;
233 }
234
235 # Handle Uncouth Termination
236 sub signal_handler {
237
238         # Make text normal
239         print color("reset"), "\n";
240
241         # SMTP password masked
242         system "stty echo";
243
244         # tmp files from --compose
245         if (defined $compose_filename) {
246                 if (-e $compose_filename) {
247                         print "'$compose_filename' contains an intermediate version of the email you were composing.\n";
248                 }
249                 if (-e ($compose_filename . ".final")) {
250                         print "'$compose_filename.final' contains the composed email.\n"
251                 }
252         }
253
254         exit;
255 };
256
257 $SIG{TERM} = \&signal_handler;
258 $SIG{INT}  = \&signal_handler;
259
260 # Begin by accumulating all the variables (defined above), that we will end up
261 # needing, first, from the command line:
262
263 my $rc = GetOptions("sender|from=s" => \$sender,
264                     "in-reply-to=s" => \$initial_reply_to,
265                     "subject=s" => \$initial_subject,
266                     "to=s" => \@to,
267                     "cc=s" => \@initial_cc,
268                     "bcc=s" => \@bcclist,
269                     "chain-reply-to!" => \$chain_reply_to,
270                     "smtp-server=s" => \$smtp_server,
271                     "smtp-server-port=s" => \$smtp_server_port,
272                     "smtp-user=s" => \$smtp_authuser,
273                     "smtp-pass:s" => \$smtp_authpass,
274                     "smtp-ssl" => sub { $smtp_encryption = 'ssl' },
275                     "smtp-encryption=s" => \$smtp_encryption,
276                     "identity=s" => \$identity,
277                     "annotate" => \$annotate,
278                     "compose" => \$compose,
279                     "quiet" => \$quiet,
280                     "cc-cmd=s" => \$cc_cmd,
281                     "suppress-from!" => \$suppress_from,
282                     "suppress-cc=s" => \@suppress_cc,
283                     "signed-off-cc|signed-off-by-cc!" => \$signed_off_by_cc,
284                     "confirm=s" => \$confirm,
285                     "dry-run" => \$dry_run,
286                     "envelope-sender=s" => \$envelope_sender,
287                     "thread!" => \$thread,
288                     "validate!" => \$validate,
289                     "format-patch!" => \$format_patch,
290          );
291
292 unless ($rc) {
293     usage();
294 }
295
296 die "Cannot run git format-patch from outside a repository\n"
297         if $format_patch and not $repo;
298
299 # Now, let's fill any that aren't set in with defaults:
300
301 sub read_config {
302         my ($prefix) = @_;
303
304         foreach my $setting (keys %config_bool_settings) {
305                 my $target = $config_bool_settings{$setting}->[0];
306                 $$target = Git::config_bool(@repo, "$prefix.$setting") unless (defined $$target);
307         }
308
309         foreach my $setting (keys %config_settings) {
310                 my $target = $config_settings{$setting};
311                 if (ref($target) eq "ARRAY") {
312                         unless (@$target) {
313                                 my @values = Git::config(@repo, "$prefix.$setting");
314                                 @$target = @values if (@values && defined $values[0]);
315                         }
316                 }
317                 else {
318                         $$target = Git::config(@repo, "$prefix.$setting") unless (defined $$target);
319                 }
320         }
321
322         if (!defined $smtp_encryption) {
323                 my $enc = Git::config(@repo, "$prefix.smtpencryption");
324                 if (defined $enc) {
325                         $smtp_encryption = $enc;
326                 } elsif (Git::config_bool(@repo, "$prefix.smtpssl")) {
327                         $smtp_encryption = 'ssl';
328                 }
329         }
330 }
331
332 # read configuration from [sendemail "$identity"], fall back on [sendemail]
333 $identity = Git::config(@repo, "sendemail.identity") unless (defined $identity);
334 read_config("sendemail.$identity") if (defined $identity);
335 read_config("sendemail");
336
337 # fall back on builtin bool defaults
338 foreach my $setting (values %config_bool_settings) {
339         ${$setting->[0]} = $setting->[1] unless (defined (${$setting->[0]}));
340 }
341
342 # 'default' encryption is none -- this only prevents a warning
343 $smtp_encryption = '' unless (defined $smtp_encryption);
344
345 # Set CC suppressions
346 my(%suppress_cc);
347 if (@suppress_cc) {
348         foreach my $entry (@suppress_cc) {
349                 die "Unknown --suppress-cc field: '$entry'\n"
350                         unless $entry =~ /^(all|cccmd|cc|author|self|sob|body|bodycc)$/;
351                 $suppress_cc{$entry} = 1;
352         }
353 }
354
355 if ($suppress_cc{'all'}) {
356         foreach my $entry (qw (cccmd cc author self sob body bodycc)) {
357                 $suppress_cc{$entry} = 1;
358         }
359         delete $suppress_cc{'all'};
360 }
361
362 # If explicit old-style ones are specified, they trump --suppress-cc.
363 $suppress_cc{'self'} = $suppress_from if defined $suppress_from;
364 $suppress_cc{'sob'} = !$signed_off_by_cc if defined $signed_off_by_cc;
365
366 if ($suppress_cc{'body'}) {
367         foreach my $entry (qw (sob bodycc)) {
368                 $suppress_cc{$entry} = 1;
369         }
370         delete $suppress_cc{'body'};
371 }
372
373 # Set confirm's default value
374 my $confirm_unconfigured = !defined $confirm;
375 if ($confirm_unconfigured) {
376         $confirm = scalar %suppress_cc ? 'compose' : 'auto';
377 };
378 die "Unknown --confirm setting: '$confirm'\n"
379         unless $confirm =~ /^(?:auto|cc|compose|always|never)/;
380
381 # Debugging, print out the suppressions.
382 if (0) {
383         print "suppressions:\n";
384         foreach my $entry (keys %suppress_cc) {
385                 printf "  %-5s -> $suppress_cc{$entry}\n", $entry;
386         }
387 }
388
389 my ($repoauthor, $repocommitter);
390 ($repoauthor) = Git::ident_person(@repo, 'author');
391 ($repocommitter) = Git::ident_person(@repo, 'committer');
392
393 # Verify the user input
394
395 foreach my $entry (@to) {
396         die "Comma in --to entry: $entry'\n" unless $entry !~ m/,/;
397 }
398
399 foreach my $entry (@initial_cc) {
400         die "Comma in --cc entry: $entry'\n" unless $entry !~ m/,/;
401 }
402
403 foreach my $entry (@bcclist) {
404         die "Comma in --bcclist entry: $entry'\n" unless $entry !~ m/,/;
405 }
406
407 sub parse_address_line {
408         if ($have_mail_address) {
409                 return map { $_->format } Mail::Address->parse($_[0]);
410         } else {
411                 return split_addrs($_[0]);
412         }
413 }
414
415 sub split_addrs {
416         return quotewords('\s*,\s*', 1, @_);
417 }
418
419 my %aliases;
420 my %parse_alias = (
421         # multiline formats can be supported in the future
422         mutt => sub { my $fh = shift; while (<$fh>) {
423                 if (/^\s*alias\s+(?:-group\s+\S+\s+)*(\S+)\s+(.*)$/) {
424                         my ($alias, $addr) = ($1, $2);
425                         $addr =~ s/#.*$//; # mutt allows # comments
426                          # commas delimit multiple addresses
427                         $aliases{$alias} = [ split_addrs($addr) ];
428                 }}},
429         mailrc => sub { my $fh = shift; while (<$fh>) {
430                 if (/^alias\s+(\S+)\s+(.*)$/) {
431                         # spaces delimit multiple addresses
432                         $aliases{$1} = [ quotewords('\s+', 0, $2) ];
433                 }}},
434         pine => sub { my $fh = shift; my $f='\t[^\t]*';
435                 for (my $x = ''; defined($x); $x = $_) {
436                         chomp $x;
437                         $x .= $1 while(defined($_ = <$fh>) && /^ +(.*)$/);
438                         $x =~ /^(\S+)$f\t\(?([^\t]+?)\)?(:?$f){0,2}$/ or next;
439                         $aliases{$1} = [ split_addrs($2) ];
440                 }},
441         elm => sub  { my $fh = shift;
442                       while (<$fh>) {
443                           if (/^(\S+)\s+=\s+[^=]+=\s(\S+)/) {
444                               my ($alias, $addr) = ($1, $2);
445                                $aliases{$alias} = [ split_addrs($addr) ];
446                           }
447                       } },
448
449         gnus => sub { my $fh = shift; while (<$fh>) {
450                 if (/\(define-mail-alias\s+"(\S+?)"\s+"(\S+?)"\)/) {
451                         $aliases{$1} = [ $2 ];
452                 }}}
453 );
454
455 if (@alias_files and $aliasfiletype and defined $parse_alias{$aliasfiletype}) {
456         foreach my $file (@alias_files) {
457                 open my $fh, '<', $file or die "opening $file: $!\n";
458                 $parse_alias{$aliasfiletype}->($fh);
459                 close $fh;
460         }
461 }
462
463 ($sender) = expand_aliases($sender) if defined $sender;
464
465 # returns 1 if the conflict must be solved using it as a format-patch argument
466 sub check_file_rev_conflict($) {
467         return unless $repo;
468         my $f = shift;
469         try {
470                 $repo->command('rev-parse', '--verify', '--quiet', $f);
471                 if (defined($format_patch)) {
472                         return $format_patch;
473                 }
474                 die(<<EOF);
475 File '$f' exists but it could also be the range of commits
476 to produce patches for.  Please disambiguate by...
477
478     * Saying "./$f" if you mean a file; or
479     * Giving --format-patch option if you mean a range.
480 EOF
481         } catch Git::Error::Command with {
482                 return 0;
483         }
484 }
485
486 # Now that all the defaults are set, process the rest of the command line
487 # arguments and collect up the files that need to be processed.
488 my @rev_list_opts;
489 while (defined(my $f = shift @ARGV)) {
490         if ($f eq "--") {
491                 push @rev_list_opts, "--", @ARGV;
492                 @ARGV = ();
493         } elsif (-d $f and !check_file_rev_conflict($f)) {
494                 opendir(DH,$f)
495                         or die "Failed to opendir $f: $!";
496
497                 push @files, grep { -f $_ } map { +$f . "/" . $_ }
498                                 sort readdir(DH);
499                 closedir(DH);
500         } elsif ((-f $f or -p $f) and !check_file_rev_conflict($f)) {
501                 push @files, $f;
502         } else {
503                 push @rev_list_opts, $f;
504         }
505 }
506
507 if (@rev_list_opts) {
508         die "Cannot run git format-patch from outside a repository\n"
509                 unless $repo;
510         push @files, $repo->command('format-patch', '-o', tempdir(CLEANUP => 1), @rev_list_opts);
511 }
512
513 if ($validate) {
514         foreach my $f (@files) {
515                 unless (-p $f) {
516                         my $error = validate_patch($f);
517                         $error and die "fatal: $f: $error\nwarning: no patches were sent\n";
518                 }
519         }
520 }
521
522 if (@files) {
523         unless ($quiet) {
524                 print $_,"\n" for (@files);
525         }
526 } else {
527         print STDERR "\nNo patch files specified!\n\n";
528         usage();
529 }
530
531 sub get_patch_subject($) {
532         my $fn = shift;
533         open (my $fh, '<', $fn);
534         while (my $line = <$fh>) {
535                 next unless ($line =~ /^Subject: (.*)$/);
536                 close $fh;
537                 return "GIT: $1\n";
538         }
539         close $fh;
540         die "No subject line in $fn ?";
541 }
542
543 if ($compose) {
544         # Note that this does not need to be secure, but we will make a small
545         # effort to have it be unique
546         $compose_filename = ($repo ?
547                 tempfile(".gitsendemail.msg.XXXXXX", DIR => $repo->repo_path()) :
548                 tempfile(".gitsendemail.msg.XXXXXX", DIR => "."))[1];
549         open(C,">",$compose_filename)
550                 or die "Failed to open for writing $compose_filename: $!";
551
552
553         my $tpl_sender = $sender || $repoauthor || $repocommitter || '';
554         my $tpl_subject = $initial_subject || '';
555         my $tpl_reply_to = $initial_reply_to || '';
556
557         print C <<EOT;
558 From $tpl_sender # This line is ignored.
559 GIT: Lines beginning in "GIT:" will be removed.
560 GIT: Consider including an overall diffstat or table of contents
561 GIT: for the patch you are writing.
562 GIT:
563 GIT: Clear the body content if you don't wish to send a summary.
564 From: $tpl_sender
565 Subject: $tpl_subject
566 In-Reply-To: $tpl_reply_to
567
568 EOT
569         for my $f (@files) {
570                 print C get_patch_subject($f);
571         }
572         close(C);
573
574         if ($annotate) {
575                 do_edit($compose_filename, @files);
576         } else {
577                 do_edit($compose_filename);
578         }
579
580         open(C2,">",$compose_filename . ".final")
581                 or die "Failed to open $compose_filename.final : " . $!;
582
583         open(C,"<",$compose_filename)
584                 or die "Failed to open $compose_filename : " . $!;
585
586         my $need_8bit_cte = file_has_nonascii($compose_filename);
587         my $in_body = 0;
588         my $summary_empty = 1;
589         while(<C>) {
590                 next if m/^GIT:/;
591                 if ($in_body) {
592                         $summary_empty = 0 unless (/^\n$/);
593                 } elsif (/^\n$/) {
594                         $in_body = 1;
595                         if ($need_8bit_cte) {
596                                 print C2 "MIME-Version: 1.0\n",
597                                          "Content-Type: text/plain; ",
598                                            "charset=UTF-8\n",
599                                          "Content-Transfer-Encoding: 8bit\n";
600                         }
601                 } elsif (/^MIME-Version:/i) {
602                         $need_8bit_cte = 0;
603                 } elsif (/^Subject:\s*(.+)\s*$/i) {
604                         $initial_subject = $1;
605                         my $subject = $initial_subject;
606                         $_ = "Subject: " .
607                                 ($subject =~ /[^[:ascii:]]/ ?
608                                  quote_rfc2047($subject) :
609                                  $subject) .
610                                 "\n";
611                 } elsif (/^In-Reply-To:\s*(.+)\s*$/i) {
612                         $initial_reply_to = $1;
613                         next;
614                 } elsif (/^From:\s*(.+)\s*$/i) {
615                         $sender = $1;
616                         next;
617                 } elsif (/^(?:To|Cc|Bcc):/i) {
618                         print "To/Cc/Bcc fields are not interpreted yet, they have been ignored\n";
619                         next;
620                 }
621                 print C2 $_;
622         }
623         close(C);
624         close(C2);
625
626         if ($summary_empty) {
627                 print "Summary email is empty, skipping it\n";
628                 $compose = -1;
629         }
630 } elsif ($annotate) {
631         do_edit(@files);
632 }
633
634 sub ask {
635         my ($prompt, %arg) = @_;
636         my $valid_re = $arg{valid_re};
637         my $default = $arg{default};
638         my $resp;
639         my $i = 0;
640         return defined $default ? $default : undef
641                 unless defined $term->IN and defined fileno($term->IN) and
642                        defined $term->OUT and defined fileno($term->OUT);
643         while ($i++ < 10) {
644                 $resp = $term->readline($prompt);
645                 if (!defined $resp) { # EOF
646                         print "\n";
647                         return defined $default ? $default : undef;
648                 }
649                 if ($resp eq '' and defined $default) {
650                         return $default;
651                 }
652                 if (!defined $valid_re or $resp =~ /$valid_re/) {
653                         return $resp;
654                 }
655         }
656         return undef;
657 }
658
659 my $prompting = 0;
660 if (!defined $sender) {
661         $sender = $repoauthor || $repocommitter || '';
662         $sender = ask("Who should the emails appear to be from? [$sender] ",
663                       default => $sender);
664         print "Emails will be sent from: ", $sender, "\n";
665         $prompting++;
666 }
667
668 if (!@to) {
669         my $to = ask("Who should the emails be sent to? ");
670         push @to, parse_address_line($to) if defined $to; # sanitized/validated later
671         $prompting++;
672 }
673
674 sub expand_aliases {
675         return map { expand_one_alias($_) } @_;
676 }
677
678 my %EXPANDED_ALIASES;
679 sub expand_one_alias {
680         my $alias = shift;
681         if ($EXPANDED_ALIASES{$alias}) {
682                 die "fatal: alias '$alias' expands to itself\n";
683         }
684         local $EXPANDED_ALIASES{$alias} = 1;
685         return $aliases{$alias} ? expand_aliases(@{$aliases{$alias}}) : $alias;
686 }
687
688 @to = expand_aliases(@to);
689 @to = (map { sanitize_address($_) } @to);
690 @initial_cc = expand_aliases(@initial_cc);
691 @bcclist = expand_aliases(@bcclist);
692
693 if ($thread && !defined $initial_reply_to && $prompting) {
694         $initial_reply_to = ask(
695                 "Message-ID to be used as In-Reply-To for the first email? ");
696 }
697 if (defined $initial_reply_to) {
698         $initial_reply_to =~ s/^\s*<?//;
699         $initial_reply_to =~ s/>?\s*$//;
700         $initial_reply_to = "<$initial_reply_to>" if $initial_reply_to ne '';
701 }
702
703 if (!defined $smtp_server) {
704         foreach (qw( /usr/sbin/sendmail /usr/lib/sendmail )) {
705                 if (-x $_) {
706                         $smtp_server = $_;
707                         last;
708                 }
709         }
710         $smtp_server ||= 'localhost'; # could be 127.0.0.1, too... *shrug*
711 }
712
713 if ($compose && $compose > 0) {
714         @files = ($compose_filename . ".final", @files);
715 }
716
717 # Variables we set as part of the loop over files
718 our ($message_id, %mail, $subject, $reply_to, $references, $message,
719         $needs_confirm, $message_num, $ask_default);
720
721 sub extract_valid_address {
722         my $address = shift;
723         my $local_part_regexp = '[^<>"\s@]+';
724         my $domain_regexp = '[^.<>"\s@]+(?:\.[^.<>"\s@]+)+';
725
726         # check for a local address:
727         return $address if ($address =~ /^($local_part_regexp)$/);
728
729         $address =~ s/^\s*<(.*)>\s*$/$1/;
730         if ($have_email_valid) {
731                 return scalar Email::Valid->address($address);
732         } else {
733                 # less robust/correct than the monster regexp in Email::Valid,
734                 # but still does a 99% job, and one less dependency
735                 $address =~ /($local_part_regexp\@$domain_regexp)/;
736                 return $1;
737         }
738 }
739
740 # Usually don't need to change anything below here.
741
742 # we make a "fake" message id by taking the current number
743 # of seconds since the beginning of Unix time and tacking on
744 # a random number to the end, in case we are called quicker than
745 # 1 second since the last time we were called.
746
747 # We'll setup a template for the message id, using the "from" address:
748
749 my ($message_id_stamp, $message_id_serial);
750 sub make_message_id
751 {
752         my $uniq;
753         if (!defined $message_id_stamp) {
754                 $message_id_stamp = sprintf("%s-%s", time, $$);
755                 $message_id_serial = 0;
756         }
757         $message_id_serial++;
758         $uniq = "$message_id_stamp-$message_id_serial";
759
760         my $du_part;
761         for ($sender, $repocommitter, $repoauthor) {
762                 $du_part = extract_valid_address(sanitize_address($_));
763                 last if (defined $du_part and $du_part ne '');
764         }
765         if (not defined $du_part or $du_part eq '') {
766                 use Sys::Hostname qw();
767                 $du_part = 'user@' . Sys::Hostname::hostname();
768         }
769         my $message_id_template = "<%s-git-send-email-%s>";
770         $message_id = sprintf($message_id_template, $uniq, $du_part);
771         #print "new message id = $message_id\n"; # Was useful for debugging
772 }
773
774
775
776 $time = time - scalar $#files;
777
778 sub unquote_rfc2047 {
779         local ($_) = @_;
780         my $encoding;
781         if (s/=\?([^?]+)\?q\?(.*)\?=/$2/g) {
782                 $encoding = $1;
783                 s/_/ /g;
784                 s/=([0-9A-F]{2})/chr(hex($1))/eg;
785         }
786         return wantarray ? ($_, $encoding) : $_;
787 }
788
789 sub quote_rfc2047 {
790         local $_ = shift;
791         my $encoding = shift || 'UTF-8';
792         s/([^-a-zA-Z0-9!*+\/])/sprintf("=%02X", ord($1))/eg;
793         s/(.*)/=\?$encoding\?q\?$1\?=/;
794         return $_;
795 }
796
797 sub is_rfc2047_quoted {
798         my $s = shift;
799         my $token = '[^][()<>@,;:"\/?.= \000-\037\177-\377]+';
800         my $encoded_text = '[!->@-~]+';
801         length($s) <= 75 &&
802         $s =~ m/^(?:"[[:ascii:]]*"|=\?$token\?$token\?$encoded_text\?=)$/o;
803 }
804
805 # use the simplest quoting being able to handle the recipient
806 sub sanitize_address
807 {
808         my ($recipient) = @_;
809         my ($recipient_name, $recipient_addr) = ($recipient =~ /^(.*?)\s*(<.*)/);
810
811         if (not $recipient_name) {
812                 return "$recipient";
813         }
814
815         # if recipient_name is already quoted, do nothing
816         if (is_rfc2047_quoted($recipient_name)) {
817                 return $recipient;
818         }
819
820         # rfc2047 is needed if a non-ascii char is included
821         if ($recipient_name =~ /[^[:ascii:]]/) {
822                 $recipient_name =~ s/^"(.*)"$/$1/;
823                 $recipient_name = quote_rfc2047($recipient_name);
824         }
825
826         # double quotes are needed if specials or CTLs are included
827         elsif ($recipient_name =~ /[][()<>@,;:\\".\000-\037\177]/) {
828                 $recipient_name =~ s/(["\\\r])/\\$1/g;
829                 $recipient_name = "\"$recipient_name\"";
830         }
831
832         return "$recipient_name $recipient_addr";
833
834 }
835
836 # Returns 1 if the message was sent, and 0 otherwise.
837 # In actuality, the whole program dies when there
838 # is an error sending a message.
839
840 sub send_message
841 {
842         my @recipients = unique_email_list(@to);
843         @cc = (grep { my $cc = extract_valid_address($_);
844                       not grep { $cc eq $_ } @recipients
845                     }
846                map { sanitize_address($_) }
847                @cc);
848         my $to = join (",\n\t", @recipients);
849         @recipients = unique_email_list(@recipients,@cc,@bcclist);
850         @recipients = (map { extract_valid_address($_) } @recipients);
851         my $date = format_2822_time($time++);
852         my $gitversion = '@@GIT_VERSION@@';
853         if ($gitversion =~ m/..GIT_VERSION../) {
854             $gitversion = Git::version();
855         }
856
857         my $cc = join(",\n\t", unique_email_list(@cc));
858         my $ccline = "";
859         if ($cc ne '') {
860                 $ccline = "\nCc: $cc";
861         }
862         my $sanitized_sender = sanitize_address($sender);
863         make_message_id() unless defined($message_id);
864
865         my $header = "From: $sanitized_sender
866 To: $to${ccline}
867 Subject: $subject
868 Date: $date
869 Message-Id: $message_id
870 X-Mailer: git-send-email $gitversion
871 ";
872         if ($reply_to) {
873
874                 $header .= "In-Reply-To: $reply_to\n";
875                 $header .= "References: $references\n";
876         }
877         if (@xh) {
878                 $header .= join("\n", @xh) . "\n";
879         }
880
881         my @sendmail_parameters = ('-i', @recipients);
882         my $raw_from = $sanitized_sender;
883         if (defined $envelope_sender && $envelope_sender ne "auto") {
884                 $raw_from = $envelope_sender;
885         }
886         $raw_from = extract_valid_address($raw_from);
887         unshift (@sendmail_parameters,
888                         '-f', $raw_from) if(defined $envelope_sender);
889
890         if ($needs_confirm && !$dry_run) {
891                 print "\n$header\n";
892                 if ($needs_confirm eq "inform") {
893                         $confirm_unconfigured = 0; # squelch this message for the rest of this run
894                         $ask_default = "y"; # assume yes on EOF since user hasn't explicitly asked for confirmation
895                         print "    The Cc list above has been expanded by additional\n";
896                         print "    addresses found in the patch commit message. By default\n";
897                         print "    send-email prompts before sending whenever this occurs.\n";
898                         print "    This behavior is controlled by the sendemail.confirm\n";
899                         print "    configuration setting.\n";
900                         print "\n";
901                         print "    For additional information, run 'git send-email --help'.\n";
902                         print "    To retain the current behavior, but squelch this message,\n";
903                         print "    run 'git config --global sendemail.confirm auto'.\n\n";
904                 }
905                 $_ = ask("Send this email? ([y]es|[n]o|[q]uit|[a]ll): ",
906                          valid_re => qr/^(?:yes|y|no|n|quit|q|all|a)/i,
907                          default => $ask_default);
908                 die "Send this email reply required" unless defined $_;
909                 if (/^n/i) {
910                         return 0;
911                 } elsif (/^q/i) {
912                         cleanup_compose_files();
913                         exit(0);
914                 } elsif (/^a/i) {
915                         $confirm = 'never';
916                 }
917         }
918
919         if ($dry_run) {
920                 # We don't want to send the email.
921         } elsif ($smtp_server =~ m#^/#) {
922                 my $pid = open my $sm, '|-';
923                 defined $pid or die $!;
924                 if (!$pid) {
925                         exec($smtp_server, @sendmail_parameters) or die $!;
926                 }
927                 print $sm "$header\n$message";
928                 close $sm or die $?;
929         } else {
930
931                 if (!defined $smtp_server) {
932                         die "The required SMTP server is not properly defined."
933                 }
934
935                 if ($smtp_encryption eq 'ssl') {
936                         $smtp_server_port ||= 465; # ssmtp
937                         require Net::SMTP::SSL;
938                         $smtp ||= Net::SMTP::SSL->new($smtp_server, Port => $smtp_server_port);
939                 }
940                 else {
941                         require Net::SMTP;
942                         $smtp ||= Net::SMTP->new((defined $smtp_server_port)
943                                                  ? "$smtp_server:$smtp_server_port"
944                                                  : $smtp_server);
945                         if ($smtp_encryption eq 'tls' && $smtp) {
946                                 require Net::SMTP::SSL;
947                                 $smtp->command('STARTTLS');
948                                 $smtp->response();
949                                 if ($smtp->code == 220) {
950                                         $smtp = Net::SMTP::SSL->start_SSL($smtp)
951                                                 or die "STARTTLS failed! ".$smtp->message;
952                                         $smtp_encryption = '';
953                                         # Send EHLO again to receive fresh
954                                         # supported commands
955                                         $smtp->hello();
956                                 } else {
957                                         die "Server does not support STARTTLS! ".$smtp->message;
958                                 }
959                         }
960                 }
961
962                 if (!$smtp) {
963                         die "Unable to initialize SMTP properly.  Is there something wrong with your config?";
964                 }
965
966                 if (defined $smtp_authuser) {
967
968                         if (!defined $smtp_authpass) {
969
970                                 system "stty -echo";
971
972                                 do {
973                                         print "Password: ";
974                                         $_ = <STDIN>;
975                                         print "\n";
976                                 } while (!defined $_);
977
978                                 chomp($smtp_authpass = $_);
979
980                                 system "stty echo";
981                         }
982
983                         $auth ||= $smtp->auth( $smtp_authuser, $smtp_authpass ) or die $smtp->message;
984                 }
985
986                 $smtp->mail( $raw_from ) or die $smtp->message;
987                 $smtp->to( @recipients ) or die $smtp->message;
988                 $smtp->data or die $smtp->message;
989                 $smtp->datasend("$header\n$message") or die $smtp->message;
990                 $smtp->dataend() or die $smtp->message;
991                 $smtp->code =~ /250|200/ or die "Failed to send $subject\n".$smtp->message;
992         }
993         if ($quiet) {
994                 printf (($dry_run ? "Dry-" : "")."Sent %s\n", $subject);
995         } else {
996                 print (($dry_run ? "Dry-" : "")."OK. Log says:\n");
997                 if ($smtp_server !~ m#^/#) {
998                         print "Server: $smtp_server\n";
999                         print "MAIL FROM:<$raw_from>\n";
1000                         foreach my $entry (@recipients) {
1001                             print "RCPT TO:<$entry>\n";
1002                         }
1003                 } else {
1004                         print "Sendmail: $smtp_server ".join(' ',@sendmail_parameters)."\n";
1005                 }
1006                 print $header, "\n";
1007                 if ($smtp) {
1008                         print "Result: ", $smtp->code, ' ',
1009                                 ($smtp->message =~ /\n([^\n]+\n)$/s), "\n";
1010                 } else {
1011                         print "Result: OK\n";
1012                 }
1013         }
1014
1015         return 1;
1016 }
1017
1018 $reply_to = $initial_reply_to;
1019 $references = $initial_reply_to || '';
1020 $subject = $initial_subject;
1021 $message_num = 0;
1022
1023 foreach my $t (@files) {
1024         open(F,"<",$t) or die "can't open file $t";
1025
1026         my $author = undef;
1027         my $author_encoding;
1028         my $has_content_type;
1029         my $body_encoding;
1030         @cc = ();
1031         @xh = ();
1032         my $input_format = undef;
1033         my @header = ();
1034         $message = "";
1035         $message_num++;
1036         # First unfold multiline header fields
1037         while(<F>) {
1038                 last if /^\s*$/;
1039                 if (/^\s+\S/ and @header) {
1040                         chomp($header[$#header]);
1041                         s/^\s+/ /;
1042                         $header[$#header] .= $_;
1043             } else {
1044                         push(@header, $_);
1045                 }
1046         }
1047         # Now parse the header
1048         foreach(@header) {
1049                 if (/^From /) {
1050                         $input_format = 'mbox';
1051                         next;
1052                 }
1053                 chomp;
1054                 if (!defined $input_format && /^[-A-Za-z]+:\s/) {
1055                         $input_format = 'mbox';
1056                 }
1057
1058                 if (defined $input_format && $input_format eq 'mbox') {
1059                         if (/^Subject:\s+(.*)$/) {
1060                                 $subject = $1;
1061                         }
1062                         elsif (/^From:\s+(.*)$/) {
1063                                 ($author, $author_encoding) = unquote_rfc2047($1);
1064                                 next if $suppress_cc{'author'};
1065                                 next if $suppress_cc{'self'} and $author eq $sender;
1066                                 printf("(mbox) Adding cc: %s from line '%s'\n",
1067                                         $1, $_) unless $quiet;
1068                                 push @cc, $1;
1069                         }
1070                         elsif (/^Cc:\s+(.*)$/) {
1071                                 foreach my $addr (parse_address_line($1)) {
1072                                         if (unquote_rfc2047($addr) eq $sender) {
1073                                                 next if ($suppress_cc{'self'});
1074                                         } else {
1075                                                 next if ($suppress_cc{'cc'});
1076                                         }
1077                                         printf("(mbox) Adding cc: %s from line '%s'\n",
1078                                                 $addr, $_) unless $quiet;
1079                                         push @cc, $addr;
1080                                 }
1081                         }
1082                         elsif (/^Content-type:/i) {
1083                                 $has_content_type = 1;
1084                                 if (/charset="?([^ "]+)/) {
1085                                         $body_encoding = $1;
1086                                 }
1087                                 push @xh, $_;
1088                         }
1089                         elsif (/^Message-Id: (.*)/i) {
1090                                 $message_id = $1;
1091                         }
1092                         elsif (!/^Date:\s/ && /^[-A-Za-z]+:\s+\S/) {
1093                                 push @xh, $_;
1094                         }
1095
1096                 } else {
1097                         # In the traditional
1098                         # "send lots of email" format,
1099                         # line 1 = cc
1100                         # line 2 = subject
1101                         # So let's support that, too.
1102                         $input_format = 'lots';
1103                         if (@cc == 0 && !$suppress_cc{'cc'}) {
1104                                 printf("(non-mbox) Adding cc: %s from line '%s'\n",
1105                                         $_, $_) unless $quiet;
1106                                 push @cc, $_;
1107                         } elsif (!defined $subject) {
1108                                 $subject = $_;
1109                         }
1110                 }
1111         }
1112         # Now parse the message body
1113         while(<F>) {
1114                 $message .=  $_;
1115                 if (/^(Signed-off-by|Cc): (.*)$/i) {
1116                         chomp;
1117                         my ($what, $c) = ($1, $2);
1118                         chomp $c;
1119                         if ($c eq $sender) {
1120                                 next if ($suppress_cc{'self'});
1121                         } else {
1122                                 next if $suppress_cc{'sob'} and $what =~ /Signed-off-by/i;
1123                                 next if $suppress_cc{'bodycc'} and $what =~ /Cc/i;
1124                         }
1125                         push @cc, $c;
1126                         printf("(body) Adding cc: %s from line '%s'\n",
1127                                 $c, $_) unless $quiet;
1128                 }
1129         }
1130         close F;
1131
1132         if (defined $cc_cmd && !$suppress_cc{'cccmd'}) {
1133                 open(F, "$cc_cmd \Q$t\E |")
1134                         or die "(cc-cmd) Could not execute '$cc_cmd'";
1135                 while(<F>) {
1136                         my $c = $_;
1137                         $c =~ s/^\s*//g;
1138                         $c =~ s/\n$//g;
1139                         next if ($c eq $sender and $suppress_from);
1140                         push @cc, $c;
1141                         printf("(cc-cmd) Adding cc: %s from: '%s'\n",
1142                                 $c, $cc_cmd) unless $quiet;
1143                 }
1144                 close F
1145                         or die "(cc-cmd) failed to close pipe to '$cc_cmd'";
1146         }
1147
1148         if (defined $author and $author ne $sender) {
1149                 $message = "From: $author\n\n$message";
1150                 if (defined $author_encoding) {
1151                         if ($has_content_type) {
1152                                 if ($body_encoding eq $author_encoding) {
1153                                         # ok, we already have the right encoding
1154                                 }
1155                                 else {
1156                                         # uh oh, we should re-encode
1157                                 }
1158                         }
1159                         else {
1160                                 push @xh,
1161                                   'MIME-Version: 1.0',
1162                                   "Content-Type: text/plain; charset=$author_encoding",
1163                                   'Content-Transfer-Encoding: 8bit';
1164                         }
1165                 }
1166         }
1167
1168         $needs_confirm = (
1169                 $confirm eq "always" or
1170                 ($confirm =~ /^(?:auto|cc)$/ && @cc) or
1171                 ($confirm =~ /^(?:auto|compose)$/ && $compose && $message_num == 1));
1172         $needs_confirm = "inform" if ($needs_confirm && $confirm_unconfigured && @cc);
1173
1174         @cc = (@initial_cc, @cc);
1175
1176         my $message_was_sent = send_message();
1177
1178         # set up for the next message
1179         if ($thread && $message_was_sent &&
1180                 (chain_reply_to() || !defined $reply_to || length($reply_to) == 0)) {
1181                 $reply_to = $message_id;
1182                 if (length $references > 0) {
1183                         $references .= "\n $message_id";
1184                 } else {
1185                         $references = "$message_id";
1186                 }
1187         }
1188         $message_id = undef;
1189 }
1190
1191 cleanup_compose_files();
1192
1193 sub cleanup_compose_files() {
1194         unlink($compose_filename, $compose_filename . ".final") if $compose;
1195 }
1196
1197 $smtp->quit if $smtp;
1198
1199 sub unique_email_list(@) {
1200         my %seen;
1201         my @emails;
1202
1203         foreach my $entry (@_) {
1204                 if (my $clean = extract_valid_address($entry)) {
1205                         $seen{$clean} ||= 0;
1206                         next if $seen{$clean}++;
1207                         push @emails, $entry;
1208                 } else {
1209                         print STDERR "W: unable to extract a valid address",
1210                                         " from: $entry\n";
1211                 }
1212         }
1213         return @emails;
1214 }
1215
1216 sub validate_patch {
1217         my $fn = shift;
1218         open(my $fh, '<', $fn)
1219                 or die "unable to open $fn: $!\n";
1220         while (my $line = <$fh>) {
1221                 if (length($line) > 998) {
1222                         return "$.: patch contains a line longer than 998 characters";
1223                 }
1224         }
1225         return undef;
1226 }
1227
1228 sub file_has_nonascii {
1229         my $fn = shift;
1230         open(my $fh, '<', $fn)
1231                 or die "unable to open $fn: $!\n";
1232         while (my $line = <$fh>) {
1233                 return 1 if $line =~ /[^[:ascii:]]/;
1234         }
1235         return 0;
1236 }