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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     --[no-]to               <str>  * Email To:
51     --[no-]cc               <str>  * Email Cc:
52     --[no-]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     --smtp-domain           <str>  * The domain name sent to HELO/EHLO handshake
68     --smtp-debug            <0|1>  * Disable, enable Net::SMTP debug.
69
70   Automating:
71     --identity              <str>  * Use the sendemail.<id> options.
72     --cc-cmd                <str>  * Email Cc: via `<str> \$patch_path`
73     --suppress-cc           <str>  * author, self, sob, cc, cccmd, body, bodycc, all.
74     --[no-]signed-off-by-cc        * Send to Signed-off-by: addresses. Default on.
75     --[no-]suppress-from           * Send to self. Default off.
76     --[no-]chain-reply-to          * Chain In-Reply-To: fields. Default off.
77     --[no-]thread                  * Use In-Reply-To: field. Default on.
78
79   Administering:
80     --confirm               <str>  * Confirm recipients before sending;
81                                      auto, cc, compose, always, or never.
82     --quiet                        * Output one line of info per email.
83     --dry-run                      * Don't actually send the emails.
84     --[no-]validate                * Perform patch sanity checks. Default on.
85     --[no-]format-patch            * understand any non optional arguments as
86                                      `git format-patch` ones.
87
88 EOT
89         exit(1);
90 }
91
92 # most mail servers generate the Date: header, but not all...
93 sub format_2822_time {
94         my ($time) = @_;
95         my @localtm = localtime($time);
96         my @gmttm = gmtime($time);
97         my $localmin = $localtm[1] + $localtm[2] * 60;
98         my $gmtmin = $gmttm[1] + $gmttm[2] * 60;
99         if ($localtm[0] != $gmttm[0]) {
100                 die "local zone differs from GMT by a non-minute interval\n";
101         }
102         if ((($gmttm[6] + 1) % 7) == $localtm[6]) {
103                 $localmin += 1440;
104         } elsif ((($gmttm[6] - 1) % 7) == $localtm[6]) {
105                 $localmin -= 1440;
106         } elsif ($gmttm[6] != $localtm[6]) {
107                 die "local time offset greater than or equal to 24 hours\n";
108         }
109         my $offset = $localmin - $gmtmin;
110         my $offhour = $offset / 60;
111         my $offmin = abs($offset % 60);
112         if (abs($offhour) >= 24) {
113                 die ("local time offset greater than or equal to 24 hours\n");
114         }
115
116         return sprintf("%s, %2d %s %d %02d:%02d:%02d %s%02d%02d",
117                        qw(Sun Mon Tue Wed Thu Fri Sat)[$localtm[6]],
118                        $localtm[3],
119                        qw(Jan Feb Mar Apr May Jun
120                           Jul Aug Sep Oct Nov Dec)[$localtm[4]],
121                        $localtm[5]+1900,
122                        $localtm[2],
123                        $localtm[1],
124                        $localtm[0],
125                        ($offset >= 0) ? '+' : '-',
126                        abs($offhour),
127                        $offmin,
128                        );
129 }
130
131 my $have_email_valid = eval { require Email::Valid; 1 };
132 my $have_mail_address = eval { require Mail::Address; 1 };
133 my $smtp;
134 my $auth;
135 my $mail_domain_default = "localhost.localdomain";
136 my $mail_domain;
137
138 sub unique_email_list(@);
139 sub cleanup_compose_files();
140
141 # Variables we fill in automatically, or via prompting:
142 my (@to,$no_to,@cc,$no_cc,@initial_cc,@bcclist,$no_bcc,@xh,
143         $initial_reply_to,$initial_subject,@files,
144         $author,$sender,$smtp_authpass,$annotate,$compose,$time);
145
146 my $envelope_sender;
147
148 # Example reply to:
149 #$initial_reply_to = ''; #<20050203173208.GA23964@foobar.com>';
150
151 my $repo = eval { Git->repository() };
152 my @repo = $repo ? ($repo) : ();
153 my $term = eval {
154         $ENV{"GIT_SEND_EMAIL_NOTTY"}
155                 ? new Term::ReadLine 'git-send-email', \*STDIN, \*STDOUT
156                 : new Term::ReadLine 'git-send-email';
157 };
158 if ($@) {
159         $term = new FakeTerm "$@: going non-interactive";
160 }
161
162 # Behavior modification variables
163 my ($quiet, $dry_run) = (0, 0);
164 my $format_patch;
165 my $compose_filename;
166
167 # Handle interactive edition of files.
168 my $multiedit;
169 my $editor;
170
171 sub do_edit {
172         if (!defined($editor)) {
173                 $editor = Git::command_oneline('var', 'GIT_EDITOR');
174         }
175         if (defined($multiedit) && !$multiedit) {
176                 map {
177                         system('sh', '-c', $editor.' "$@"', $editor, $_);
178                         if (($? & 127) || ($? >> 8)) {
179                                 die("the editor exited uncleanly, aborting everything");
180                         }
181                 } @_;
182         } else {
183                 system('sh', '-c', $editor.' "$@"', $editor, @_);
184                 if (($? & 127) || ($? >> 8)) {
185                         die("the editor exited uncleanly, aborting everything");
186                 }
187         }
188 }
189
190 # Variables with corresponding config settings
191 my ($thread, $chain_reply_to, $suppress_from, $signed_off_by_cc, $cc_cmd);
192 my ($smtp_server, $smtp_server_port, $smtp_authuser, $smtp_encryption);
193 my ($identity, $aliasfiletype, @alias_files, @smtp_host_parts);
194 my ($validate, $confirm);
195 my (@suppress_cc);
196
197 my ($debug_net_smtp) = 0;               # Net::SMTP, see send_message()
198
199 my $not_set_by_user = "true but not set by the user";
200
201 my %config_bool_settings = (
202     "thread" => [\$thread, 1],
203     "chainreplyto" => [\$chain_reply_to, $not_set_by_user],
204     "suppressfrom" => [\$suppress_from, undef],
205     "signedoffbycc" => [\$signed_off_by_cc, undef],
206     "signedoffcc" => [\$signed_off_by_cc, undef],      # Deprecated
207     "validate" => [\$validate, 1],
208 );
209
210 my %config_settings = (
211     "smtpserver" => \$smtp_server,
212     "smtpserverport" => \$smtp_server_port,
213     "smtpuser" => \$smtp_authuser,
214     "smtppass" => \$smtp_authpass,
215     "to" => \@to,
216     "cc" => \@initial_cc,
217     "cccmd" => \$cc_cmd,
218     "aliasfiletype" => \$aliasfiletype,
219     "bcc" => \@bcclist,
220     "aliasesfile" => \@alias_files,
221     "suppresscc" => \@suppress_cc,
222     "envelopesender" => \$envelope_sender,
223     "multiedit" => \$multiedit,
224     "confirm"   => \$confirm,
225     "from" => \$sender,
226 );
227
228 # Help users prepare for 1.7.0
229 sub chain_reply_to {
230         if (defined $chain_reply_to &&
231             $chain_reply_to eq $not_set_by_user) {
232                 print STDERR
233                     "In git 1.7.0, the default has changed to --no-chain-reply-to\n" .
234                     "Set sendemail.chainreplyto configuration variable to true if\n" .
235                     "you want to keep --chain-reply-to as your default.\n";
236                 $chain_reply_to = 0;
237         }
238         return $chain_reply_to;
239 }
240
241 # Handle Uncouth Termination
242 sub signal_handler {
243
244         # Make text normal
245         print color("reset"), "\n";
246
247         # SMTP password masked
248         system "stty echo";
249
250         # tmp files from --compose
251         if (defined $compose_filename) {
252                 if (-e $compose_filename) {
253                         print "'$compose_filename' contains an intermediate version of the email you were composing.\n";
254                 }
255                 if (-e ($compose_filename . ".final")) {
256                         print "'$compose_filename.final' contains the composed email.\n"
257                 }
258         }
259
260         exit;
261 };
262
263 $SIG{TERM} = \&signal_handler;
264 $SIG{INT}  = \&signal_handler;
265
266 # Begin by accumulating all the variables (defined above), that we will end up
267 # needing, first, from the command line:
268
269 my $rc = GetOptions("sender|from=s" => \$sender,
270                     "in-reply-to=s" => \$initial_reply_to,
271                     "subject=s" => \$initial_subject,
272                     "to=s" => \@to,
273                     "no-to" => \$no_to,
274                     "cc=s" => \@initial_cc,
275                     "no-cc" => \$no_cc,
276                     "bcc=s" => \@bcclist,
277                     "no-bcc" => \$no_bcc,
278                     "chain-reply-to!" => \$chain_reply_to,
279                     "smtp-server=s" => \$smtp_server,
280                     "smtp-server-port=s" => \$smtp_server_port,
281                     "smtp-user=s" => \$smtp_authuser,
282                     "smtp-pass:s" => \$smtp_authpass,
283                     "smtp-ssl" => sub { $smtp_encryption = 'ssl' },
284                     "smtp-encryption=s" => \$smtp_encryption,
285                     "smtp-debug:i" => \$debug_net_smtp,
286                     "smtp-domain:s" => \$mail_domain,
287                     "identity=s" => \$identity,
288                     "annotate" => \$annotate,
289                     "compose" => \$compose,
290                     "quiet" => \$quiet,
291                     "cc-cmd=s" => \$cc_cmd,
292                     "suppress-from!" => \$suppress_from,
293                     "suppress-cc=s" => \@suppress_cc,
294                     "signed-off-cc|signed-off-by-cc!" => \$signed_off_by_cc,
295                     "confirm=s" => \$confirm,
296                     "dry-run" => \$dry_run,
297                     "envelope-sender=s" => \$envelope_sender,
298                     "thread!" => \$thread,
299                     "validate!" => \$validate,
300                     "format-patch!" => \$format_patch,
301          );
302
303 unless ($rc) {
304     usage();
305 }
306
307 die "Cannot run git format-patch from outside a repository\n"
308         if $format_patch and not $repo;
309
310 # Now, let's fill any that aren't set in with defaults:
311
312 sub read_config {
313         my ($prefix) = @_;
314
315         foreach my $setting (keys %config_bool_settings) {
316                 my $target = $config_bool_settings{$setting}->[0];
317                 $$target = Git::config_bool(@repo, "$prefix.$setting") unless (defined $$target);
318         }
319
320         foreach my $setting (keys %config_settings) {
321                 my $target = $config_settings{$setting};
322                 next if $setting eq "to" and defined $no_to;
323                 next if $setting eq "cc" and defined $no_cc;
324                 next if $setting eq "bcc" and defined $no_bcc;
325                 if (ref($target) eq "ARRAY") {
326                         unless (@$target) {
327                                 my @values = Git::config(@repo, "$prefix.$setting");
328                                 @$target = @values if (@values && defined $values[0]);
329                         }
330                 }
331                 else {
332                         $$target = Git::config(@repo, "$prefix.$setting") unless (defined $$target);
333                 }
334         }
335
336         if (!defined $smtp_encryption) {
337                 my $enc = Git::config(@repo, "$prefix.smtpencryption");
338                 if (defined $enc) {
339                         $smtp_encryption = $enc;
340                 } elsif (Git::config_bool(@repo, "$prefix.smtpssl")) {
341                         $smtp_encryption = 'ssl';
342                 }
343         }
344 }
345
346 # read configuration from [sendemail "$identity"], fall back on [sendemail]
347 $identity = Git::config(@repo, "sendemail.identity") unless (defined $identity);
348 read_config("sendemail.$identity") if (defined $identity);
349 read_config("sendemail");
350
351 # fall back on builtin bool defaults
352 foreach my $setting (values %config_bool_settings) {
353         ${$setting->[0]} = $setting->[1] unless (defined (${$setting->[0]}));
354 }
355
356 # 'default' encryption is none -- this only prevents a warning
357 $smtp_encryption = '' unless (defined $smtp_encryption);
358
359 # Set CC suppressions
360 my(%suppress_cc);
361 if (@suppress_cc) {
362         foreach my $entry (@suppress_cc) {
363                 die "Unknown --suppress-cc field: '$entry'\n"
364                         unless $entry =~ /^(all|cccmd|cc|author|self|sob|body|bodycc)$/;
365                 $suppress_cc{$entry} = 1;
366         }
367 }
368
369 if ($suppress_cc{'all'}) {
370         foreach my $entry (qw (cccmd cc author self sob body bodycc)) {
371                 $suppress_cc{$entry} = 1;
372         }
373         delete $suppress_cc{'all'};
374 }
375
376 # If explicit old-style ones are specified, they trump --suppress-cc.
377 $suppress_cc{'self'} = $suppress_from if defined $suppress_from;
378 $suppress_cc{'sob'} = !$signed_off_by_cc if defined $signed_off_by_cc;
379
380 if ($suppress_cc{'body'}) {
381         foreach my $entry (qw (sob bodycc)) {
382                 $suppress_cc{$entry} = 1;
383         }
384         delete $suppress_cc{'body'};
385 }
386
387 # Set confirm's default value
388 my $confirm_unconfigured = !defined $confirm;
389 if ($confirm_unconfigured) {
390         $confirm = scalar %suppress_cc ? 'compose' : 'auto';
391 };
392 die "Unknown --confirm setting: '$confirm'\n"
393         unless $confirm =~ /^(?:auto|cc|compose|always|never)/;
394
395 # Debugging, print out the suppressions.
396 if (0) {
397         print "suppressions:\n";
398         foreach my $entry (keys %suppress_cc) {
399                 printf "  %-5s -> $suppress_cc{$entry}\n", $entry;
400         }
401 }
402
403 my ($repoauthor, $repocommitter);
404 ($repoauthor) = Git::ident_person(@repo, 'author');
405 ($repocommitter) = Git::ident_person(@repo, 'committer');
406
407 # Verify the user input
408
409 foreach my $entry (@to) {
410         die "Comma in --to entry: $entry'\n" unless $entry !~ m/,/;
411 }
412
413 foreach my $entry (@initial_cc) {
414         die "Comma in --cc entry: $entry'\n" unless $entry !~ m/,/;
415 }
416
417 foreach my $entry (@bcclist) {
418         die "Comma in --bcclist entry: $entry'\n" unless $entry !~ m/,/;
419 }
420
421 sub parse_address_line {
422         if ($have_mail_address) {
423                 return map { $_->format } Mail::Address->parse($_[0]);
424         } else {
425                 return split_addrs($_[0]);
426         }
427 }
428
429 sub split_addrs {
430         return quotewords('\s*,\s*', 1, @_);
431 }
432
433 my %aliases;
434 my %parse_alias = (
435         # multiline formats can be supported in the future
436         mutt => sub { my $fh = shift; while (<$fh>) {
437                 if (/^\s*alias\s+(?:-group\s+\S+\s+)*(\S+)\s+(.*)$/) {
438                         my ($alias, $addr) = ($1, $2);
439                         $addr =~ s/#.*$//; # mutt allows # comments
440                          # commas delimit multiple addresses
441                         $aliases{$alias} = [ split_addrs($addr) ];
442                 }}},
443         mailrc => sub { my $fh = shift; while (<$fh>) {
444                 if (/^alias\s+(\S+)\s+(.*)$/) {
445                         # spaces delimit multiple addresses
446                         $aliases{$1} = [ quotewords('\s+', 0, $2) ];
447                 }}},
448         pine => sub { my $fh = shift; my $f='\t[^\t]*';
449                 for (my $x = ''; defined($x); $x = $_) {
450                         chomp $x;
451                         $x .= $1 while(defined($_ = <$fh>) && /^ +(.*)$/);
452                         $x =~ /^(\S+)$f\t\(?([^\t]+?)\)?(:?$f){0,2}$/ or next;
453                         $aliases{$1} = [ split_addrs($2) ];
454                 }},
455         elm => sub  { my $fh = shift;
456                       while (<$fh>) {
457                           if (/^(\S+)\s+=\s+[^=]+=\s(\S+)/) {
458                               my ($alias, $addr) = ($1, $2);
459                                $aliases{$alias} = [ split_addrs($addr) ];
460                           }
461                       } },
462
463         gnus => sub { my $fh = shift; while (<$fh>) {
464                 if (/\(define-mail-alias\s+"(\S+?)"\s+"(\S+?)"\)/) {
465                         $aliases{$1} = [ $2 ];
466                 }}}
467 );
468
469 if (@alias_files and $aliasfiletype and defined $parse_alias{$aliasfiletype}) {
470         foreach my $file (@alias_files) {
471                 open my $fh, '<', $file or die "opening $file: $!\n";
472                 $parse_alias{$aliasfiletype}->($fh);
473                 close $fh;
474         }
475 }
476
477 ($sender) = expand_aliases($sender) if defined $sender;
478
479 # returns 1 if the conflict must be solved using it as a format-patch argument
480 sub check_file_rev_conflict($) {
481         return unless $repo;
482         my $f = shift;
483         try {
484                 $repo->command('rev-parse', '--verify', '--quiet', $f);
485                 if (defined($format_patch)) {
486                         return $format_patch;
487                 }
488                 die(<<EOF);
489 File '$f' exists but it could also be the range of commits
490 to produce patches for.  Please disambiguate by...
491
492     * Saying "./$f" if you mean a file; or
493     * Giving --format-patch option if you mean a range.
494 EOF
495         } catch Git::Error::Command with {
496                 return 0;
497         }
498 }
499
500 # Now that all the defaults are set, process the rest of the command line
501 # arguments and collect up the files that need to be processed.
502 my @rev_list_opts;
503 while (defined(my $f = shift @ARGV)) {
504         if ($f eq "--") {
505                 push @rev_list_opts, "--", @ARGV;
506                 @ARGV = ();
507         } elsif (-d $f and !check_file_rev_conflict($f)) {
508                 opendir(DH,$f)
509                         or die "Failed to opendir $f: $!";
510
511                 push @files, grep { -f $_ } map { +$f . "/" . $_ }
512                                 sort readdir(DH);
513                 closedir(DH);
514         } elsif ((-f $f or -p $f) and !check_file_rev_conflict($f)) {
515                 push @files, $f;
516         } else {
517                 push @rev_list_opts, $f;
518         }
519 }
520
521 if (@rev_list_opts) {
522         die "Cannot run git format-patch from outside a repository\n"
523                 unless $repo;
524         push @files, $repo->command('format-patch', '-o', tempdir(CLEANUP => 1), @rev_list_opts);
525 }
526
527 if ($validate) {
528         foreach my $f (@files) {
529                 unless (-p $f) {
530                         my $error = validate_patch($f);
531                         $error and die "fatal: $f: $error\nwarning: no patches were sent\n";
532                 }
533         }
534 }
535
536 if (@files) {
537         unless ($quiet) {
538                 print $_,"\n" for (@files);
539         }
540 } else {
541         print STDERR "\nNo patch files specified!\n\n";
542         usage();
543 }
544
545 sub get_patch_subject($) {
546         my $fn = shift;
547         open (my $fh, '<', $fn);
548         while (my $line = <$fh>) {
549                 next unless ($line =~ /^Subject: (.*)$/);
550                 close $fh;
551                 return "GIT: $1\n";
552         }
553         close $fh;
554         die "No subject line in $fn ?";
555 }
556
557 if ($compose) {
558         # Note that this does not need to be secure, but we will make a small
559         # effort to have it be unique
560         $compose_filename = ($repo ?
561                 tempfile(".gitsendemail.msg.XXXXXX", DIR => $repo->repo_path()) :
562                 tempfile(".gitsendemail.msg.XXXXXX", DIR => "."))[1];
563         open(C,">",$compose_filename)
564                 or die "Failed to open for writing $compose_filename: $!";
565
566
567         my $tpl_sender = $sender || $repoauthor || $repocommitter || '';
568         my $tpl_subject = $initial_subject || '';
569         my $tpl_reply_to = $initial_reply_to || '';
570
571         print C <<EOT;
572 From $tpl_sender # This line is ignored.
573 GIT: Lines beginning in "GIT:" will be removed.
574 GIT: Consider including an overall diffstat or table of contents
575 GIT: for the patch you are writing.
576 GIT:
577 GIT: Clear the body content if you don't wish to send a summary.
578 From: $tpl_sender
579 Subject: $tpl_subject
580 In-Reply-To: $tpl_reply_to
581
582 EOT
583         for my $f (@files) {
584                 print C get_patch_subject($f);
585         }
586         close(C);
587
588         if ($annotate) {
589                 do_edit($compose_filename, @files);
590         } else {
591                 do_edit($compose_filename);
592         }
593
594         open(C2,">",$compose_filename . ".final")
595                 or die "Failed to open $compose_filename.final : " . $!;
596
597         open(C,"<",$compose_filename)
598                 or die "Failed to open $compose_filename : " . $!;
599
600         my $need_8bit_cte = file_has_nonascii($compose_filename);
601         my $in_body = 0;
602         my $summary_empty = 1;
603         while(<C>) {
604                 next if m/^GIT:/;
605                 if ($in_body) {
606                         $summary_empty = 0 unless (/^\n$/);
607                 } elsif (/^\n$/) {
608                         $in_body = 1;
609                         if ($need_8bit_cte) {
610                                 print C2 "MIME-Version: 1.0\n",
611                                          "Content-Type: text/plain; ",
612                                            "charset=UTF-8\n",
613                                          "Content-Transfer-Encoding: 8bit\n";
614                         }
615                 } elsif (/^MIME-Version:/i) {
616                         $need_8bit_cte = 0;
617                 } elsif (/^Subject:\s*(.+)\s*$/i) {
618                         $initial_subject = $1;
619                         my $subject = $initial_subject;
620                         $_ = "Subject: " .
621                                 ($subject =~ /[^[:ascii:]]/ ?
622                                  quote_rfc2047($subject) :
623                                  $subject) .
624                                 "\n";
625                 } elsif (/^In-Reply-To:\s*(.+)\s*$/i) {
626                         $initial_reply_to = $1;
627                         next;
628                 } elsif (/^From:\s*(.+)\s*$/i) {
629                         $sender = $1;
630                         next;
631                 } elsif (/^(?:To|Cc|Bcc):/i) {
632                         print "To/Cc/Bcc fields are not interpreted yet, they have been ignored\n";
633                         next;
634                 }
635                 print C2 $_;
636         }
637         close(C);
638         close(C2);
639
640         if ($summary_empty) {
641                 print "Summary email is empty, skipping it\n";
642                 $compose = -1;
643         }
644 } elsif ($annotate) {
645         do_edit(@files);
646 }
647
648 sub ask {
649         my ($prompt, %arg) = @_;
650         my $valid_re = $arg{valid_re};
651         my $default = $arg{default};
652         my $resp;
653         my $i = 0;
654         return defined $default ? $default : undef
655                 unless defined $term->IN and defined fileno($term->IN) and
656                        defined $term->OUT and defined fileno($term->OUT);
657         while ($i++ < 10) {
658                 $resp = $term->readline($prompt);
659                 if (!defined $resp) { # EOF
660                         print "\n";
661                         return defined $default ? $default : undef;
662                 }
663                 if ($resp eq '' and defined $default) {
664                         return $default;
665                 }
666                 if (!defined $valid_re or $resp =~ /$valid_re/) {
667                         return $resp;
668                 }
669         }
670         return undef;
671 }
672
673 my $prompting = 0;
674 if (!defined $sender) {
675         $sender = $repoauthor || $repocommitter || '';
676         $sender = ask("Who should the emails appear to be from? [$sender] ",
677                       default => $sender);
678         print "Emails will be sent from: ", $sender, "\n";
679         $prompting++;
680 }
681
682 if (!@to) {
683         my $to = ask("Who should the emails be sent to? ");
684         push @to, parse_address_line($to) if defined $to; # sanitized/validated later
685         $prompting++;
686 }
687
688 sub expand_aliases {
689         return map { expand_one_alias($_) } @_;
690 }
691
692 my %EXPANDED_ALIASES;
693 sub expand_one_alias {
694         my $alias = shift;
695         if ($EXPANDED_ALIASES{$alias}) {
696                 die "fatal: alias '$alias' expands to itself\n";
697         }
698         local $EXPANDED_ALIASES{$alias} = 1;
699         return $aliases{$alias} ? expand_aliases(@{$aliases{$alias}}) : $alias;
700 }
701
702 @to = expand_aliases(@to);
703 @to = (map { sanitize_address($_) } @to);
704 @initial_cc = expand_aliases(@initial_cc);
705 @bcclist = expand_aliases(@bcclist);
706
707 if ($thread && !defined $initial_reply_to && $prompting) {
708         $initial_reply_to = ask(
709                 "Message-ID to be used as In-Reply-To for the first email? ");
710 }
711 if (defined $initial_reply_to) {
712         $initial_reply_to =~ s/^\s*<?//;
713         $initial_reply_to =~ s/>?\s*$//;
714         $initial_reply_to = "<$initial_reply_to>" if $initial_reply_to ne '';
715 }
716
717 if (!defined $smtp_server) {
718         foreach (qw( /usr/sbin/sendmail /usr/lib/sendmail )) {
719                 if (-x $_) {
720                         $smtp_server = $_;
721                         last;
722                 }
723         }
724         $smtp_server ||= 'localhost'; # could be 127.0.0.1, too... *shrug*
725 }
726
727 if ($compose && $compose > 0) {
728         @files = ($compose_filename . ".final", @files);
729 }
730
731 # Variables we set as part of the loop over files
732 our ($message_id, %mail, $subject, $reply_to, $references, $message,
733         $needs_confirm, $message_num, $ask_default);
734
735 sub extract_valid_address {
736         my $address = shift;
737         my $local_part_regexp = '[^<>"\s@]+';
738         my $domain_regexp = '[^.<>"\s@]+(?:\.[^.<>"\s@]+)+';
739
740         # check for a local address:
741         return $address if ($address =~ /^($local_part_regexp)$/);
742
743         $address =~ s/^\s*<(.*)>\s*$/$1/;
744         if ($have_email_valid) {
745                 return scalar Email::Valid->address($address);
746         } else {
747                 # less robust/correct than the monster regexp in Email::Valid,
748                 # but still does a 99% job, and one less dependency
749                 $address =~ /($local_part_regexp\@$domain_regexp)/;
750                 return $1;
751         }
752 }
753
754 # Usually don't need to change anything below here.
755
756 # we make a "fake" message id by taking the current number
757 # of seconds since the beginning of Unix time and tacking on
758 # a random number to the end, in case we are called quicker than
759 # 1 second since the last time we were called.
760
761 # We'll setup a template for the message id, using the "from" address:
762
763 my ($message_id_stamp, $message_id_serial);
764 sub make_message_id
765 {
766         my $uniq;
767         if (!defined $message_id_stamp) {
768                 $message_id_stamp = sprintf("%s-%s", time, $$);
769                 $message_id_serial = 0;
770         }
771         $message_id_serial++;
772         $uniq = "$message_id_stamp-$message_id_serial";
773
774         my $du_part;
775         for ($sender, $repocommitter, $repoauthor) {
776                 $du_part = extract_valid_address(sanitize_address($_));
777                 last if (defined $du_part and $du_part ne '');
778         }
779         if (not defined $du_part or $du_part eq '') {
780                 use Sys::Hostname qw();
781                 $du_part = 'user@' . Sys::Hostname::hostname();
782         }
783         my $message_id_template = "<%s-git-send-email-%s>";
784         $message_id = sprintf($message_id_template, $uniq, $du_part);
785         #print "new message id = $message_id\n"; # Was useful for debugging
786 }
787
788
789
790 $time = time - scalar $#files;
791
792 sub unquote_rfc2047 {
793         local ($_) = @_;
794         my $encoding;
795         if (s/=\?([^?]+)\?q\?(.*)\?=/$2/g) {
796                 $encoding = $1;
797                 s/_/ /g;
798                 s/=([0-9A-F]{2})/chr(hex($1))/eg;
799         }
800         return wantarray ? ($_, $encoding) : $_;
801 }
802
803 sub quote_rfc2047 {
804         local $_ = shift;
805         my $encoding = shift || 'UTF-8';
806         s/([^-a-zA-Z0-9!*+\/])/sprintf("=%02X", ord($1))/eg;
807         s/(.*)/=\?$encoding\?q\?$1\?=/;
808         return $_;
809 }
810
811 sub is_rfc2047_quoted {
812         my $s = shift;
813         my $token = '[^][()<>@,;:"\/?.= \000-\037\177-\377]+';
814         my $encoded_text = '[!->@-~]+';
815         length($s) <= 75 &&
816         $s =~ m/^(?:"[[:ascii:]]*"|=\?$token\?$token\?$encoded_text\?=)$/o;
817 }
818
819 # use the simplest quoting being able to handle the recipient
820 sub sanitize_address
821 {
822         my ($recipient) = @_;
823         my ($recipient_name, $recipient_addr) = ($recipient =~ /^(.*?)\s*(<.*)/);
824
825         if (not $recipient_name) {
826                 return "$recipient";
827         }
828
829         # if recipient_name is already quoted, do nothing
830         if (is_rfc2047_quoted($recipient_name)) {
831                 return $recipient;
832         }
833
834         # rfc2047 is needed if a non-ascii char is included
835         if ($recipient_name =~ /[^[:ascii:]]/) {
836                 $recipient_name =~ s/^"(.*)"$/$1/;
837                 $recipient_name = quote_rfc2047($recipient_name);
838         }
839
840         # double quotes are needed if specials or CTLs are included
841         elsif ($recipient_name =~ /[][()<>@,;:\\".\000-\037\177]/) {
842                 $recipient_name =~ s/(["\\\r])/\\$1/g;
843                 $recipient_name = "\"$recipient_name\"";
844         }
845
846         return "$recipient_name $recipient_addr";
847
848 }
849
850 # Returns the local Fully Qualified Domain Name (FQDN) if available.
851 #
852 # Tightly configured MTAa require that a caller sends a real DNS
853 # domain name that corresponds the IP address in the HELO/EHLO
854 # handshake. This is used to verify the connection and prevent
855 # spammers from trying to hide their identity. If the DNS and IP don't
856 # match, the receiveing MTA may deny the connection.
857 #
858 # Here is a deny example of Net::SMTP with the default "localhost.localdomain"
859 #
860 # Net::SMTP=GLOB(0x267ec28)>>> EHLO localhost.localdomain
861 # Net::SMTP=GLOB(0x267ec28)<<< 550 EHLO argument does not match calling host
862 #
863 # This maildomain*() code is based on ideas in Perl library Test::Reporter
864 # /usr/share/perl5/Test/Reporter/Mail/Util.pm ==> sub _maildomain ()
865
866 sub maildomain_net
867 {
868         my $maildomain;
869
870         if (eval { require Net::Domain; 1 }) {
871                 my $domain = Net::Domain::domainname();
872                 $maildomain = $domain
873                         unless $^O eq 'darwin' && $domain =~ /\.local$/;
874         }
875
876         return $maildomain;
877 }
878
879 sub maildomain_mta
880 {
881         my $maildomain;
882
883         if (eval { require Net::SMTP; 1 }) {
884                 for my $host (qw(mailhost localhost)) {
885                         my $smtp = Net::SMTP->new($host);
886                         if (defined $smtp) {
887                                 my $domain = $smtp->domain;
888                                 $smtp->quit;
889
890                                 $maildomain = $domain
891                                         unless $^O eq 'darwin' && $domain =~ /\.local$/;
892
893                                 last if $maildomain;
894                         }
895                 }
896         }
897
898         return $maildomain;
899 }
900
901 sub maildomain
902 {
903         return maildomain_net() || maildomain_mta() || $mail_domain_default;
904 }
905
906 # Returns 1 if the message was sent, and 0 otherwise.
907 # In actuality, the whole program dies when there
908 # is an error sending a message.
909
910 sub send_message
911 {
912         my @recipients = unique_email_list(@to);
913         @cc = (grep { my $cc = extract_valid_address($_);
914                       not grep { $cc eq $_ } @recipients
915                     }
916                map { sanitize_address($_) }
917                @cc);
918         my $to = join (",\n\t", @recipients);
919         @recipients = unique_email_list(@recipients,@cc,@bcclist);
920         @recipients = (map { extract_valid_address($_) } @recipients);
921         my $date = format_2822_time($time++);
922         my $gitversion = '@@GIT_VERSION@@';
923         if ($gitversion =~ m/..GIT_VERSION../) {
924             $gitversion = Git::version();
925         }
926
927         my $cc = join(",\n\t", unique_email_list(@cc));
928         my $ccline = "";
929         if ($cc ne '') {
930                 $ccline = "\nCc: $cc";
931         }
932         my $sanitized_sender = sanitize_address($sender);
933         make_message_id() unless defined($message_id);
934
935         my $header = "From: $sanitized_sender
936 To: $to${ccline}
937 Subject: $subject
938 Date: $date
939 Message-Id: $message_id
940 X-Mailer: git-send-email $gitversion
941 ";
942         if ($reply_to) {
943
944                 $header .= "In-Reply-To: $reply_to\n";
945                 $header .= "References: $references\n";
946         }
947         if (@xh) {
948                 $header .= join("\n", @xh) . "\n";
949         }
950
951         my @sendmail_parameters = ('-i', @recipients);
952         my $raw_from = $sanitized_sender;
953         if (defined $envelope_sender && $envelope_sender ne "auto") {
954                 $raw_from = $envelope_sender;
955         }
956         $raw_from = extract_valid_address($raw_from);
957         unshift (@sendmail_parameters,
958                         '-f', $raw_from) if(defined $envelope_sender);
959
960         if ($needs_confirm && !$dry_run) {
961                 print "\n$header\n";
962                 if ($needs_confirm eq "inform") {
963                         $confirm_unconfigured = 0; # squelch this message for the rest of this run
964                         $ask_default = "y"; # assume yes on EOF since user hasn't explicitly asked for confirmation
965                         print "    The Cc list above has been expanded by additional\n";
966                         print "    addresses found in the patch commit message. By default\n";
967                         print "    send-email prompts before sending whenever this occurs.\n";
968                         print "    This behavior is controlled by the sendemail.confirm\n";
969                         print "    configuration setting.\n";
970                         print "\n";
971                         print "    For additional information, run 'git send-email --help'.\n";
972                         print "    To retain the current behavior, but squelch this message,\n";
973                         print "    run 'git config --global sendemail.confirm auto'.\n\n";
974                 }
975                 $_ = ask("Send this email? ([y]es|[n]o|[q]uit|[a]ll): ",
976                          valid_re => qr/^(?:yes|y|no|n|quit|q|all|a)/i,
977                          default => $ask_default);
978                 die "Send this email reply required" unless defined $_;
979                 if (/^n/i) {
980                         return 0;
981                 } elsif (/^q/i) {
982                         cleanup_compose_files();
983                         exit(0);
984                 } elsif (/^a/i) {
985                         $confirm = 'never';
986                 }
987         }
988
989         if ($dry_run) {
990                 # We don't want to send the email.
991         } elsif ($smtp_server =~ m#^/#) {
992                 my $pid = open my $sm, '|-';
993                 defined $pid or die $!;
994                 if (!$pid) {
995                         exec($smtp_server, @sendmail_parameters) or die $!;
996                 }
997                 print $sm "$header\n$message";
998                 close $sm or die $?;
999         } else {
1000
1001                 if (!defined $smtp_server) {
1002                         die "The required SMTP server is not properly defined."
1003                 }
1004
1005                 if ($smtp_encryption eq 'ssl') {
1006                         $smtp_server_port ||= 465; # ssmtp
1007                         require Net::SMTP::SSL;
1008                         $mail_domain ||= maildomain();
1009                         $smtp ||= Net::SMTP::SSL->new($smtp_server,
1010                                                       Hello => $mail_domain,
1011                                                       Port => $smtp_server_port);
1012                 }
1013                 else {
1014                         require Net::SMTP;
1015                         $mail_domain ||= maildomain();
1016                         $smtp ||= Net::SMTP->new((defined $smtp_server_port)
1017                                                  ? "$smtp_server:$smtp_server_port"
1018                                                  : $smtp_server,
1019                                                  Hello => $mail_domain,
1020                                                  Debug => $debug_net_smtp);
1021                         if ($smtp_encryption eq 'tls' && $smtp) {
1022                                 require Net::SMTP::SSL;
1023                                 $smtp->command('STARTTLS');
1024                                 $smtp->response();
1025                                 if ($smtp->code == 220) {
1026                                         $smtp = Net::SMTP::SSL->start_SSL($smtp)
1027                                                 or die "STARTTLS failed! ".$smtp->message;
1028                                         $smtp_encryption = '';
1029                                         # Send EHLO again to receive fresh
1030                                         # supported commands
1031                                         $smtp->hello();
1032                                 } else {
1033                                         die "Server does not support STARTTLS! ".$smtp->message;
1034                                 }
1035                         }
1036                 }
1037
1038                 if (!$smtp) {
1039                         die "Unable to initialize SMTP properly. Check config and use --smtp-debug. ",
1040                             "VALUES: server=$smtp_server ",
1041                             "encryption=$smtp_encryption ",
1042                             "maildomain=$mail_domain",
1043                             defined $smtp_server_port ? "port=$smtp_server_port" : "";
1044                 }
1045
1046                 if (defined $smtp_authuser) {
1047
1048                         if (!defined $smtp_authpass) {
1049
1050                                 system "stty -echo";
1051
1052                                 do {
1053                                         print "Password: ";
1054                                         $_ = <STDIN>;
1055                                         print "\n";
1056                                 } while (!defined $_);
1057
1058                                 chomp($smtp_authpass = $_);
1059
1060                                 system "stty echo";
1061                         }
1062
1063                         $auth ||= $smtp->auth( $smtp_authuser, $smtp_authpass ) or die $smtp->message;
1064                 }
1065
1066                 $smtp->mail( $raw_from ) or die $smtp->message;
1067                 $smtp->to( @recipients ) or die $smtp->message;
1068                 $smtp->data or die $smtp->message;
1069                 $smtp->datasend("$header\n$message") or die $smtp->message;
1070                 $smtp->dataend() or die $smtp->message;
1071                 $smtp->code =~ /250|200/ or die "Failed to send $subject\n".$smtp->message;
1072         }
1073         if ($quiet) {
1074                 printf (($dry_run ? "Dry-" : "")."Sent %s\n", $subject);
1075         } else {
1076                 print (($dry_run ? "Dry-" : "")."OK. Log says:\n");
1077                 if ($smtp_server !~ m#^/#) {
1078                         print "Server: $smtp_server\n";
1079                         print "MAIL FROM:<$raw_from>\n";
1080                         foreach my $entry (@recipients) {
1081                             print "RCPT TO:<$entry>\n";
1082                         }
1083                 } else {
1084                         print "Sendmail: $smtp_server ".join(' ',@sendmail_parameters)."\n";
1085                 }
1086                 print $header, "\n";
1087                 if ($smtp) {
1088                         print "Result: ", $smtp->code, ' ',
1089                                 ($smtp->message =~ /\n([^\n]+\n)$/s), "\n";
1090                 } else {
1091                         print "Result: OK\n";
1092                 }
1093         }
1094
1095         return 1;
1096 }
1097
1098 $reply_to = $initial_reply_to;
1099 $references = $initial_reply_to || '';
1100 $subject = $initial_subject;
1101 $message_num = 0;
1102
1103 foreach my $t (@files) {
1104         open(F,"<",$t) or die "can't open file $t";
1105
1106         my $author = undef;
1107         my $author_encoding;
1108         my $has_content_type;
1109         my $body_encoding;
1110         @cc = ();
1111         @xh = ();
1112         my $input_format = undef;
1113         my @header = ();
1114         $message = "";
1115         $message_num++;
1116         # First unfold multiline header fields
1117         while(<F>) {
1118                 last if /^\s*$/;
1119                 if (/^\s+\S/ and @header) {
1120                         chomp($header[$#header]);
1121                         s/^\s+/ /;
1122                         $header[$#header] .= $_;
1123             } else {
1124                         push(@header, $_);
1125                 }
1126         }
1127         # Now parse the header
1128         foreach(@header) {
1129                 if (/^From /) {
1130                         $input_format = 'mbox';
1131                         next;
1132                 }
1133                 chomp;
1134                 if (!defined $input_format && /^[-A-Za-z]+:\s/) {
1135                         $input_format = 'mbox';
1136                 }
1137
1138                 if (defined $input_format && $input_format eq 'mbox') {
1139                         if (/^Subject:\s+(.*)$/) {
1140                                 $subject = $1;
1141                         }
1142                         elsif (/^From:\s+(.*)$/) {
1143                                 ($author, $author_encoding) = unquote_rfc2047($1);
1144                                 next if $suppress_cc{'author'};
1145                                 next if $suppress_cc{'self'} and $author eq $sender;
1146                                 printf("(mbox) Adding cc: %s from line '%s'\n",
1147                                         $1, $_) unless $quiet;
1148                                 push @cc, $1;
1149                         }
1150                         elsif (/^Cc:\s+(.*)$/) {
1151                                 foreach my $addr (parse_address_line($1)) {
1152                                         if (unquote_rfc2047($addr) eq $sender) {
1153                                                 next if ($suppress_cc{'self'});
1154                                         } else {
1155                                                 next if ($suppress_cc{'cc'});
1156                                         }
1157                                         printf("(mbox) Adding cc: %s from line '%s'\n",
1158                                                 $addr, $_) unless $quiet;
1159                                         push @cc, $addr;
1160                                 }
1161                         }
1162                         elsif (/^Content-type:/i) {
1163                                 $has_content_type = 1;
1164                                 if (/charset="?([^ "]+)/) {
1165                                         $body_encoding = $1;
1166                                 }
1167                                 push @xh, $_;
1168                         }
1169                         elsif (/^Message-Id: (.*)/i) {
1170                                 $message_id = $1;
1171                         }
1172                         elsif (!/^Date:\s/ && /^[-A-Za-z]+:\s+\S/) {
1173                                 push @xh, $_;
1174                         }
1175
1176                 } else {
1177                         # In the traditional
1178                         # "send lots of email" format,
1179                         # line 1 = cc
1180                         # line 2 = subject
1181                         # So let's support that, too.
1182                         $input_format = 'lots';
1183                         if (@cc == 0 && !$suppress_cc{'cc'}) {
1184                                 printf("(non-mbox) Adding cc: %s from line '%s'\n",
1185                                         $_, $_) unless $quiet;
1186                                 push @cc, $_;
1187                         } elsif (!defined $subject) {
1188                                 $subject = $_;
1189                         }
1190                 }
1191         }
1192         # Now parse the message body
1193         while(<F>) {
1194                 $message .=  $_;
1195                 if (/^(Signed-off-by|Cc): (.*)$/i) {
1196                         chomp;
1197                         my ($what, $c) = ($1, $2);
1198                         chomp $c;
1199                         if ($c eq $sender) {
1200                                 next if ($suppress_cc{'self'});
1201                         } else {
1202                                 next if $suppress_cc{'sob'} and $what =~ /Signed-off-by/i;
1203                                 next if $suppress_cc{'bodycc'} and $what =~ /Cc/i;
1204                         }
1205                         push @cc, $c;
1206                         printf("(body) Adding cc: %s from line '%s'\n",
1207                                 $c, $_) unless $quiet;
1208                 }
1209         }
1210         close F;
1211
1212         if (defined $cc_cmd && !$suppress_cc{'cccmd'}) {
1213                 open(F, "$cc_cmd \Q$t\E |")
1214                         or die "(cc-cmd) Could not execute '$cc_cmd'";
1215                 while(<F>) {
1216                         my $c = $_;
1217                         $c =~ s/^\s*//g;
1218                         $c =~ s/\n$//g;
1219                         next if ($c eq $sender and $suppress_from);
1220                         push @cc, $c;
1221                         printf("(cc-cmd) Adding cc: %s from: '%s'\n",
1222                                 $c, $cc_cmd) unless $quiet;
1223                 }
1224                 close F
1225                         or die "(cc-cmd) failed to close pipe to '$cc_cmd'";
1226         }
1227
1228         if (defined $author and $author ne $sender) {
1229                 $message = "From: $author\n\n$message";
1230                 if (defined $author_encoding) {
1231                         if ($has_content_type) {
1232                                 if ($body_encoding eq $author_encoding) {
1233                                         # ok, we already have the right encoding
1234                                 }
1235                                 else {
1236                                         # uh oh, we should re-encode
1237                                 }
1238                         }
1239                         else {
1240                                 push @xh,
1241                                   'MIME-Version: 1.0',
1242                                   "Content-Type: text/plain; charset=$author_encoding",
1243                                   'Content-Transfer-Encoding: 8bit';
1244                         }
1245                 }
1246         }
1247
1248         $needs_confirm = (
1249                 $confirm eq "always" or
1250                 ($confirm =~ /^(?:auto|cc)$/ && @cc) or
1251                 ($confirm =~ /^(?:auto|compose)$/ && $compose && $message_num == 1));
1252         $needs_confirm = "inform" if ($needs_confirm && $confirm_unconfigured && @cc);
1253
1254         @cc = (@initial_cc, @cc);
1255
1256         my $message_was_sent = send_message();
1257
1258         # set up for the next message
1259         if ($thread && $message_was_sent &&
1260                 (chain_reply_to() || !defined $reply_to || length($reply_to) == 0)) {
1261                 $reply_to = $message_id;
1262                 if (length $references > 0) {
1263                         $references .= "\n $message_id";
1264                 } else {
1265                         $references = "$message_id";
1266                 }
1267         }
1268         $message_id = undef;
1269 }
1270
1271 cleanup_compose_files();
1272
1273 sub cleanup_compose_files() {
1274         unlink($compose_filename, $compose_filename . ".final") if $compose;
1275 }
1276
1277 $smtp->quit if $smtp;
1278
1279 sub unique_email_list(@) {
1280         my %seen;
1281         my @emails;
1282
1283         foreach my $entry (@_) {
1284                 if (my $clean = extract_valid_address($entry)) {
1285                         $seen{$clean} ||= 0;
1286                         next if $seen{$clean}++;
1287                         push @emails, $entry;
1288                 } else {
1289                         print STDERR "W: unable to extract a valid address",
1290                                         " from: $entry\n";
1291                 }
1292         }
1293         return @emails;
1294 }
1295
1296 sub validate_patch {
1297         my $fn = shift;
1298         open(my $fh, '<', $fn)
1299                 or die "unable to open $fn: $!\n";
1300         while (my $line = <$fh>) {
1301                 if (length($line) > 998) {
1302                         return "$.: patch contains a line longer than 998 characters";
1303                 }
1304         }
1305         return undef;
1306 }
1307
1308 sub file_has_nonascii {
1309         my $fn = shift;
1310         open(my $fh, '<', $fn)
1311                 or die "unable to open $fn: $!\n";
1312         while (my $line = <$fh>) {
1313                 return 1 if $line =~ /[^[:ascii:]]/;
1314         }
1315         return 0;
1316 }