Merge branch 'sg/completion-no-column'
[git] / git-send-email.perl
1 #!/usr/bin/perl
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 5.008;
20 use strict;
21 use warnings;
22 use Term::ReadLine;
23 use Getopt::Long;
24 use Text::ParseWords;
25 use Data::Dumper;
26 use Term::ANSIColor;
27 use File::Temp qw/ tempdir tempfile /;
28 use File::Spec::Functions qw(catfile);
29 use Error qw(:try);
30 use Git;
31
32 Getopt::Long::Configure qw/ pass_through /;
33
34 package FakeTerm;
35 sub new {
36         my ($class, $reason) = @_;
37         return bless \$reason, shift;
38 }
39 sub readline {
40         my $self = shift;
41         die "Cannot use readline on FakeTerm: $$self";
42 }
43 package main;
44
45
46 sub usage {
47         print <<EOT;
48 git send-email [options] <file | directory | rev-list options >
49 git send-email --dump-aliases
50
51   Composing:
52     --from                  <str>  * Email From:
53     --[no-]to               <str>  * Email To:
54     --[no-]cc               <str>  * Email Cc:
55     --[no-]bcc              <str>  * Email Bcc:
56     --subject               <str>  * Email "Subject:"
57     --in-reply-to           <str>  * Email "In-Reply-To:"
58     --[no-]xmailer                 * Add "X-Mailer:" header (default).
59     --[no-]annotate                * Review each patch that will be sent in an editor.
60     --compose                      * Open an editor for introduction.
61     --compose-encoding      <str>  * Encoding to assume for introduction.
62     --8bit-encoding         <str>  * Encoding to assume 8bit mails if undeclared
63     --transfer-encoding     <str>  * Transfer encoding to use (quoted-printable, 8bit, base64)
64
65   Sending:
66     --envelope-sender       <str>  * Email envelope sender.
67     --smtp-server       <str:int>  * Outgoing SMTP server to use. The port
68                                      is optional. Default 'localhost'.
69     --smtp-server-option    <str>  * Outgoing SMTP server option to use.
70     --smtp-server-port      <int>  * Outgoing SMTP server port.
71     --smtp-user             <str>  * Username for SMTP-AUTH.
72     --smtp-pass             <str>  * Password for SMTP-AUTH; not necessary.
73     --smtp-encryption       <str>  * tls or ssl; anything else disables.
74     --smtp-ssl                     * Deprecated. Use '--smtp-encryption ssl'.
75     --smtp-ssl-cert-path    <str>  * Path to ca-certificates (either directory or file).
76                                      Pass an empty string to disable certificate
77                                      verification.
78     --smtp-domain           <str>  * The domain name sent to HELO/EHLO handshake
79     --smtp-auth             <str>  * Space-separated list of allowed AUTH mechanisms.
80                                      This setting forces to use one of the listed mechanisms.
81     --smtp-debug            <0|1>  * Disable, enable Net::SMTP debug.
82
83   Automating:
84     --identity              <str>  * Use the sendemail.<id> options.
85     --to-cmd                <str>  * Email To: via `<str> \$patch_path`
86     --cc-cmd                <str>  * Email Cc: via `<str> \$patch_path`
87     --suppress-cc           <str>  * author, self, sob, cc, cccmd, body, bodycc, all.
88     --[no-]cc-cover                * Email Cc: addresses in the cover letter.
89     --[no-]to-cover                * Email To: addresses in the cover letter.
90     --[no-]signed-off-by-cc        * Send to Signed-off-by: addresses. Default on.
91     --[no-]suppress-from           * Send to self. Default off.
92     --[no-]chain-reply-to          * Chain In-Reply-To: fields. Default off.
93     --[no-]thread                  * Use In-Reply-To: field. Default on.
94
95   Administering:
96     --confirm               <str>  * Confirm recipients before sending;
97                                      auto, cc, compose, always, or never.
98     --quiet                        * Output one line of info per email.
99     --dry-run                      * Don't actually send the emails.
100     --[no-]validate                * Perform patch sanity checks. Default on.
101     --[no-]format-patch            * understand any non optional arguments as
102                                      `git format-patch` ones.
103     --force                        * Send even if safety checks would prevent it.
104
105   Information:
106     --dump-aliases                 * Dump configured aliases and exit.
107
108 EOT
109         exit(1);
110 }
111
112 # most mail servers generate the Date: header, but not all...
113 sub format_2822_time {
114         my ($time) = @_;
115         my @localtm = localtime($time);
116         my @gmttm = gmtime($time);
117         my $localmin = $localtm[1] + $localtm[2] * 60;
118         my $gmtmin = $gmttm[1] + $gmttm[2] * 60;
119         if ($localtm[0] != $gmttm[0]) {
120                 die "local zone differs from GMT by a non-minute interval\n";
121         }
122         if ((($gmttm[6] + 1) % 7) == $localtm[6]) {
123                 $localmin += 1440;
124         } elsif ((($gmttm[6] - 1) % 7) == $localtm[6]) {
125                 $localmin -= 1440;
126         } elsif ($gmttm[6] != $localtm[6]) {
127                 die "local time offset greater than or equal to 24 hours\n";
128         }
129         my $offset = $localmin - $gmtmin;
130         my $offhour = $offset / 60;
131         my $offmin = abs($offset % 60);
132         if (abs($offhour) >= 24) {
133                 die ("local time offset greater than or equal to 24 hours\n");
134         }
135
136         return sprintf("%s, %2d %s %d %02d:%02d:%02d %s%02d%02d",
137                        qw(Sun Mon Tue Wed Thu Fri Sat)[$localtm[6]],
138                        $localtm[3],
139                        qw(Jan Feb Mar Apr May Jun
140                           Jul Aug Sep Oct Nov Dec)[$localtm[4]],
141                        $localtm[5]+1900,
142                        $localtm[2],
143                        $localtm[1],
144                        $localtm[0],
145                        ($offset >= 0) ? '+' : '-',
146                        abs($offhour),
147                        $offmin,
148                        );
149 }
150
151 my $have_email_valid = eval { require Email::Valid; 1 };
152 my $have_mail_address = eval { require Mail::Address; 1 };
153 my $smtp;
154 my $auth;
155
156 # Regexes for RFC 2047 productions.
157 my $re_token = qr/[^][()<>@,;:\\"\/?.= \000-\037\177-\377]+/;
158 my $re_encoded_text = qr/[^? \000-\037\177-\377]+/;
159 my $re_encoded_word = qr/=\?($re_token)\?($re_token)\?($re_encoded_text)\?=/;
160
161 # Variables we fill in automatically, or via prompting:
162 my (@to,$no_to,@initial_to,@cc,$no_cc,@initial_cc,@bcclist,$no_bcc,@xh,
163         $initial_reply_to,$initial_subject,@files,
164         $author,$sender,$smtp_authpass,$annotate,$use_xmailer,$compose,$time);
165
166 my $envelope_sender;
167
168 # Example reply to:
169 #$initial_reply_to = ''; #<20050203173208.GA23964@foobar.com>';
170
171 my $repo = eval { Git->repository() };
172 my @repo = $repo ? ($repo) : ();
173 my $term = eval {
174         $ENV{"GIT_SEND_EMAIL_NOTTY"}
175                 ? new Term::ReadLine 'git-send-email', \*STDIN, \*STDOUT
176                 : new Term::ReadLine 'git-send-email';
177 };
178 if ($@) {
179         $term = new FakeTerm "$@: going non-interactive";
180 }
181
182 # Behavior modification variables
183 my ($quiet, $dry_run) = (0, 0);
184 my $format_patch;
185 my $compose_filename;
186 my $force = 0;
187 my $dump_aliases = 0;
188
189 # Handle interactive edition of files.
190 my $multiedit;
191 my $editor;
192
193 sub do_edit {
194         if (!defined($editor)) {
195                 $editor = Git::command_oneline('var', 'GIT_EDITOR');
196         }
197         if (defined($multiedit) && !$multiedit) {
198                 map {
199                         system('sh', '-c', $editor.' "$@"', $editor, $_);
200                         if (($? & 127) || ($? >> 8)) {
201                                 die("the editor exited uncleanly, aborting everything");
202                         }
203                 } @_;
204         } else {
205                 system('sh', '-c', $editor.' "$@"', $editor, @_);
206                 if (($? & 127) || ($? >> 8)) {
207                         die("the editor exited uncleanly, aborting everything");
208                 }
209         }
210 }
211
212 # Variables with corresponding config settings
213 my ($thread, $chain_reply_to, $suppress_from, $signed_off_by_cc);
214 my ($cover_cc, $cover_to);
215 my ($to_cmd, $cc_cmd);
216 my ($smtp_server, $smtp_server_port, @smtp_server_options);
217 my ($smtp_authuser, $smtp_encryption, $smtp_ssl_cert_path);
218 my ($identity, $aliasfiletype, @alias_files, $smtp_domain, $smtp_auth);
219 my ($validate, $confirm);
220 my (@suppress_cc);
221 my ($auto_8bit_encoding);
222 my ($compose_encoding);
223 my ($target_xfer_encoding);
224
225 my ($debug_net_smtp) = 0;               # Net::SMTP, see send_message()
226
227 my %config_bool_settings = (
228     "thread" => [\$thread, 1],
229     "chainreplyto" => [\$chain_reply_to, 0],
230     "suppressfrom" => [\$suppress_from, undef],
231     "signedoffbycc" => [\$signed_off_by_cc, undef],
232     "cccover" => [\$cover_cc, undef],
233     "tocover" => [\$cover_to, undef],
234     "signedoffcc" => [\$signed_off_by_cc, undef],      # Deprecated
235     "validate" => [\$validate, 1],
236     "multiedit" => [\$multiedit, undef],
237     "annotate" => [\$annotate, undef],
238     "xmailer" => [\$use_xmailer, 1]
239 );
240
241 my %config_settings = (
242     "smtpserver" => \$smtp_server,
243     "smtpserverport" => \$smtp_server_port,
244     "smtpserveroption" => \@smtp_server_options,
245     "smtpuser" => \$smtp_authuser,
246     "smtppass" => \$smtp_authpass,
247     "smtpdomain" => \$smtp_domain,
248     "smtpauth" => \$smtp_auth,
249     "to" => \@initial_to,
250     "tocmd" => \$to_cmd,
251     "cc" => \@initial_cc,
252     "cccmd" => \$cc_cmd,
253     "aliasfiletype" => \$aliasfiletype,
254     "bcc" => \@bcclist,
255     "suppresscc" => \@suppress_cc,
256     "envelopesender" => \$envelope_sender,
257     "confirm"   => \$confirm,
258     "from" => \$sender,
259     "assume8bitencoding" => \$auto_8bit_encoding,
260     "composeencoding" => \$compose_encoding,
261     "transferencoding" => \$target_xfer_encoding,
262 );
263
264 my %config_path_settings = (
265     "aliasesfile" => \@alias_files,
266     "smtpsslcertpath" => \$smtp_ssl_cert_path,
267 );
268
269 # Handle Uncouth Termination
270 sub signal_handler {
271
272         # Make text normal
273         print color("reset"), "\n";
274
275         # SMTP password masked
276         system "stty echo";
277
278         # tmp files from --compose
279         if (defined $compose_filename) {
280                 if (-e $compose_filename) {
281                         print "'$compose_filename' contains an intermediate version of the email you were composing.\n";
282                 }
283                 if (-e ($compose_filename . ".final")) {
284                         print "'$compose_filename.final' contains the composed email.\n"
285                 }
286         }
287
288         exit;
289 };
290
291 $SIG{TERM} = \&signal_handler;
292 $SIG{INT}  = \&signal_handler;
293
294 # Begin by accumulating all the variables (defined above), that we will end up
295 # needing, first, from the command line:
296
297 my $help;
298 my $rc = GetOptions("h" => \$help,
299                     "dump-aliases" => \$dump_aliases);
300 usage() unless $rc;
301 die "--dump-aliases incompatible with other options\n"
302     if !$help and $dump_aliases and @ARGV;
303 $rc = GetOptions(
304                     "sender|from=s" => \$sender,
305                     "in-reply-to=s" => \$initial_reply_to,
306                     "subject=s" => \$initial_subject,
307                     "to=s" => \@initial_to,
308                     "to-cmd=s" => \$to_cmd,
309                     "no-to" => \$no_to,
310                     "cc=s" => \@initial_cc,
311                     "no-cc" => \$no_cc,
312                     "bcc=s" => \@bcclist,
313                     "no-bcc" => \$no_bcc,
314                     "chain-reply-to!" => \$chain_reply_to,
315                     "no-chain-reply-to" => sub {$chain_reply_to = 0},
316                     "smtp-server=s" => \$smtp_server,
317                     "smtp-server-option=s" => \@smtp_server_options,
318                     "smtp-server-port=s" => \$smtp_server_port,
319                     "smtp-user=s" => \$smtp_authuser,
320                     "smtp-pass:s" => \$smtp_authpass,
321                     "smtp-ssl" => sub { $smtp_encryption = 'ssl' },
322                     "smtp-encryption=s" => \$smtp_encryption,
323                     "smtp-ssl-cert-path=s" => \$smtp_ssl_cert_path,
324                     "smtp-debug:i" => \$debug_net_smtp,
325                     "smtp-domain:s" => \$smtp_domain,
326                     "smtp-auth=s" => \$smtp_auth,
327                     "identity=s" => \$identity,
328                     "annotate!" => \$annotate,
329                     "no-annotate" => sub {$annotate = 0},
330                     "compose" => \$compose,
331                     "quiet" => \$quiet,
332                     "cc-cmd=s" => \$cc_cmd,
333                     "suppress-from!" => \$suppress_from,
334                     "no-suppress-from" => sub {$suppress_from = 0},
335                     "suppress-cc=s" => \@suppress_cc,
336                     "signed-off-cc|signed-off-by-cc!" => \$signed_off_by_cc,
337                     "no-signed-off-cc|no-signed-off-by-cc" => sub {$signed_off_by_cc = 0},
338                     "cc-cover|cc-cover!" => \$cover_cc,
339                     "no-cc-cover" => sub {$cover_cc = 0},
340                     "to-cover|to-cover!" => \$cover_to,
341                     "no-to-cover" => sub {$cover_to = 0},
342                     "confirm=s" => \$confirm,
343                     "dry-run" => \$dry_run,
344                     "envelope-sender=s" => \$envelope_sender,
345                     "thread!" => \$thread,
346                     "no-thread" => sub {$thread = 0},
347                     "validate!" => \$validate,
348                     "no-validate" => sub {$validate = 0},
349                     "transfer-encoding=s" => \$target_xfer_encoding,
350                     "format-patch!" => \$format_patch,
351                     "no-format-patch" => sub {$format_patch = 0},
352                     "8bit-encoding=s" => \$auto_8bit_encoding,
353                     "compose-encoding=s" => \$compose_encoding,
354                     "force" => \$force,
355                     "xmailer!" => \$use_xmailer,
356                     "no-xmailer" => sub {$use_xmailer = 0},
357          );
358
359 usage() if $help;
360 unless ($rc) {
361     usage();
362 }
363
364 die "Cannot run git format-patch from outside a repository\n"
365         if $format_patch and not $repo;
366
367 # Now, let's fill any that aren't set in with defaults:
368
369 sub read_config {
370         my ($prefix) = @_;
371
372         foreach my $setting (keys %config_bool_settings) {
373                 my $target = $config_bool_settings{$setting}->[0];
374                 $$target = Git::config_bool(@repo, "$prefix.$setting") unless (defined $$target);
375         }
376
377         foreach my $setting (keys %config_path_settings) {
378                 my $target = $config_path_settings{$setting};
379                 if (ref($target) eq "ARRAY") {
380                         unless (@$target) {
381                                 my @values = Git::config_path(@repo, "$prefix.$setting");
382                                 @$target = @values if (@values && defined $values[0]);
383                         }
384                 }
385                 else {
386                         $$target = Git::config_path(@repo, "$prefix.$setting") unless (defined $$target);
387                 }
388         }
389
390         foreach my $setting (keys %config_settings) {
391                 my $target = $config_settings{$setting};
392                 next if $setting eq "to" and defined $no_to;
393                 next if $setting eq "cc" and defined $no_cc;
394                 next if $setting eq "bcc" and defined $no_bcc;
395                 if (ref($target) eq "ARRAY") {
396                         unless (@$target) {
397                                 my @values = Git::config(@repo, "$prefix.$setting");
398                                 @$target = @values if (@values && defined $values[0]);
399                         }
400                 }
401                 else {
402                         $$target = Git::config(@repo, "$prefix.$setting") unless (defined $$target);
403                 }
404         }
405
406         if (!defined $smtp_encryption) {
407                 my $enc = Git::config(@repo, "$prefix.smtpencryption");
408                 if (defined $enc) {
409                         $smtp_encryption = $enc;
410                 } elsif (Git::config_bool(@repo, "$prefix.smtpssl")) {
411                         $smtp_encryption = 'ssl';
412                 }
413         }
414 }
415
416 # read configuration from [sendemail "$identity"], fall back on [sendemail]
417 $identity = Git::config(@repo, "sendemail.identity") unless (defined $identity);
418 read_config("sendemail.$identity") if (defined $identity);
419 read_config("sendemail");
420
421 # fall back on builtin bool defaults
422 foreach my $setting (values %config_bool_settings) {
423         ${$setting->[0]} = $setting->[1] unless (defined (${$setting->[0]}));
424 }
425
426 # 'default' encryption is none -- this only prevents a warning
427 $smtp_encryption = '' unless (defined $smtp_encryption);
428
429 # Set CC suppressions
430 my(%suppress_cc);
431 if (@suppress_cc) {
432         foreach my $entry (@suppress_cc) {
433                 die "Unknown --suppress-cc field: '$entry'\n"
434                         unless $entry =~ /^(?:all|cccmd|cc|author|self|sob|body|bodycc)$/;
435                 $suppress_cc{$entry} = 1;
436         }
437 }
438
439 if ($suppress_cc{'all'}) {
440         foreach my $entry (qw (cccmd cc author self sob body bodycc)) {
441                 $suppress_cc{$entry} = 1;
442         }
443         delete $suppress_cc{'all'};
444 }
445
446 # If explicit old-style ones are specified, they trump --suppress-cc.
447 $suppress_cc{'self'} = $suppress_from if defined $suppress_from;
448 $suppress_cc{'sob'} = !$signed_off_by_cc if defined $signed_off_by_cc;
449
450 if ($suppress_cc{'body'}) {
451         foreach my $entry (qw (sob bodycc)) {
452                 $suppress_cc{$entry} = 1;
453         }
454         delete $suppress_cc{'body'};
455 }
456
457 # Set confirm's default value
458 my $confirm_unconfigured = !defined $confirm;
459 if ($confirm_unconfigured) {
460         $confirm = scalar %suppress_cc ? 'compose' : 'auto';
461 };
462 die "Unknown --confirm setting: '$confirm'\n"
463         unless $confirm =~ /^(?:auto|cc|compose|always|never)/;
464
465 # Debugging, print out the suppressions.
466 if (0) {
467         print "suppressions:\n";
468         foreach my $entry (keys %suppress_cc) {
469                 printf "  %-5s -> $suppress_cc{$entry}\n", $entry;
470         }
471 }
472
473 my ($repoauthor, $repocommitter);
474 ($repoauthor) = Git::ident_person(@repo, 'author');
475 ($repocommitter) = Git::ident_person(@repo, 'committer');
476
477 sub parse_address_line {
478         if ($have_mail_address) {
479                 return map { $_->format } Mail::Address->parse($_[0]);
480         } else {
481                 return Git::parse_mailboxes($_[0]);
482         }
483 }
484
485 sub split_addrs {
486         return quotewords('\s*,\s*', 1, @_);
487 }
488
489 my %aliases;
490
491 sub parse_sendmail_alias {
492         local $_ = shift;
493         if (/"/) {
494                 print STDERR "warning: sendmail alias with quotes is not supported: $_\n";
495         } elsif (/:include:/) {
496                 print STDERR "warning: `:include:` not supported: $_\n";
497         } elsif (/[\/|]/) {
498                 print STDERR "warning: `/file` or `|pipe` redirection not supported: $_\n";
499         } elsif (/^(\S+?)\s*:\s*(.+)$/) {
500                 my ($alias, $addr) = ($1, $2);
501                 $aliases{$alias} = [ split_addrs($addr) ];
502         } else {
503                 print STDERR "warning: sendmail line is not recognized: $_\n";
504         }
505 }
506
507 sub parse_sendmail_aliases {
508         my $fh = shift;
509         my $s = '';
510         while (<$fh>) {
511                 chomp;
512                 next if /^\s*$/ || /^\s*#/;
513                 $s .= $_, next if $s =~ s/\\$// || s/^\s+//;
514                 parse_sendmail_alias($s) if $s;
515                 $s = $_;
516         }
517         $s =~ s/\\$//; # silently tolerate stray '\' on last line
518         parse_sendmail_alias($s) if $s;
519 }
520
521 my %parse_alias = (
522         # multiline formats can be supported in the future
523         mutt => sub { my $fh = shift; while (<$fh>) {
524                 if (/^\s*alias\s+(?:-group\s+\S+\s+)*(\S+)\s+(.*)$/) {
525                         my ($alias, $addr) = ($1, $2);
526                         $addr =~ s/#.*$//; # mutt allows # comments
527                          # commas delimit multiple addresses
528                         $aliases{$alias} = [ split_addrs($addr) ];
529                 }}},
530         mailrc => sub { my $fh = shift; while (<$fh>) {
531                 if (/^alias\s+(\S+)\s+(.*)$/) {
532                         # spaces delimit multiple addresses
533                         $aliases{$1} = [ quotewords('\s+', 0, $2) ];
534                 }}},
535         pine => sub { my $fh = shift; my $f='\t[^\t]*';
536                 for (my $x = ''; defined($x); $x = $_) {
537                         chomp $x;
538                         $x .= $1 while(defined($_ = <$fh>) && /^ +(.*)$/);
539                         $x =~ /^(\S+)$f\t\(?([^\t]+?)\)?(:?$f){0,2}$/ or next;
540                         $aliases{$1} = [ split_addrs($2) ];
541                 }},
542         elm => sub  { my $fh = shift;
543                       while (<$fh>) {
544                           if (/^(\S+)\s+=\s+[^=]+=\s(\S+)/) {
545                               my ($alias, $addr) = ($1, $2);
546                                $aliases{$alias} = [ split_addrs($addr) ];
547                           }
548                       } },
549         sendmail => \&parse_sendmail_aliases,
550         gnus => sub { my $fh = shift; while (<$fh>) {
551                 if (/\(define-mail-alias\s+"(\S+?)"\s+"(\S+?)"\)/) {
552                         $aliases{$1} = [ $2 ];
553                 }}}
554 );
555
556 if (@alias_files and $aliasfiletype and defined $parse_alias{$aliasfiletype}) {
557         foreach my $file (@alias_files) {
558                 open my $fh, '<', $file or die "opening $file: $!\n";
559                 $parse_alias{$aliasfiletype}->($fh);
560                 close $fh;
561         }
562 }
563
564 if ($dump_aliases) {
565     print "$_\n" for (sort keys %aliases);
566     exit(0);
567 }
568
569 # is_format_patch_arg($f) returns 0 if $f names a patch, or 1 if
570 # $f is a revision list specification to be passed to format-patch.
571 sub is_format_patch_arg {
572         return unless $repo;
573         my $f = shift;
574         try {
575                 $repo->command('rev-parse', '--verify', '--quiet', $f);
576                 if (defined($format_patch)) {
577                         return $format_patch;
578                 }
579                 die(<<EOF);
580 File '$f' exists but it could also be the range of commits
581 to produce patches for.  Please disambiguate by...
582
583     * Saying "./$f" if you mean a file; or
584     * Giving --format-patch option if you mean a range.
585 EOF
586         } catch Git::Error::Command with {
587                 # Not a valid revision.  Treat it as a filename.
588                 return 0;
589         }
590 }
591
592 # Now that all the defaults are set, process the rest of the command line
593 # arguments and collect up the files that need to be processed.
594 my @rev_list_opts;
595 while (defined(my $f = shift @ARGV)) {
596         if ($f eq "--") {
597                 push @rev_list_opts, "--", @ARGV;
598                 @ARGV = ();
599         } elsif (-d $f and !is_format_patch_arg($f)) {
600                 opendir my $dh, $f
601                         or die "Failed to opendir $f: $!";
602
603                 push @files, grep { -f $_ } map { catfile($f, $_) }
604                                 sort readdir $dh;
605                 closedir $dh;
606         } elsif ((-f $f or -p $f) and !is_format_patch_arg($f)) {
607                 push @files, $f;
608         } else {
609                 push @rev_list_opts, $f;
610         }
611 }
612
613 if (@rev_list_opts) {
614         die "Cannot run git format-patch from outside a repository\n"
615                 unless $repo;
616         push @files, $repo->command('format-patch', '-o', tempdir(CLEANUP => 1), @rev_list_opts);
617 }
618
619 if ($validate) {
620         foreach my $f (@files) {
621                 unless (-p $f) {
622                         my $error = validate_patch($f);
623                         $error and die "fatal: $f: $error\nwarning: no patches were sent\n";
624                 }
625         }
626 }
627
628 if (@files) {
629         unless ($quiet) {
630                 print $_,"\n" for (@files);
631         }
632 } else {
633         print STDERR "\nNo patch files specified!\n\n";
634         usage();
635 }
636
637 sub get_patch_subject {
638         my $fn = shift;
639         open (my $fh, '<', $fn);
640         while (my $line = <$fh>) {
641                 next unless ($line =~ /^Subject: (.*)$/);
642                 close $fh;
643                 return "GIT: $1\n";
644         }
645         close $fh;
646         die "No subject line in $fn ?";
647 }
648
649 if ($compose) {
650         # Note that this does not need to be secure, but we will make a small
651         # effort to have it be unique
652         $compose_filename = ($repo ?
653                 tempfile(".gitsendemail.msg.XXXXXX", DIR => $repo->repo_path()) :
654                 tempfile(".gitsendemail.msg.XXXXXX", DIR => "."))[1];
655         open my $c, ">", $compose_filename
656                 or die "Failed to open for writing $compose_filename: $!";
657
658
659         my $tpl_sender = $sender || $repoauthor || $repocommitter || '';
660         my $tpl_subject = $initial_subject || '';
661         my $tpl_reply_to = $initial_reply_to || '';
662
663         print $c <<EOT;
664 From $tpl_sender # This line is ignored.
665 GIT: Lines beginning in "GIT:" will be removed.
666 GIT: Consider including an overall diffstat or table of contents
667 GIT: for the patch you are writing.
668 GIT:
669 GIT: Clear the body content if you don't wish to send a summary.
670 From: $tpl_sender
671 Subject: $tpl_subject
672 In-Reply-To: $tpl_reply_to
673
674 EOT
675         for my $f (@files) {
676                 print $c get_patch_subject($f);
677         }
678         close $c;
679
680         if ($annotate) {
681                 do_edit($compose_filename, @files);
682         } else {
683                 do_edit($compose_filename);
684         }
685
686         open my $c2, ">", $compose_filename . ".final"
687                 or die "Failed to open $compose_filename.final : " . $!;
688
689         open $c, "<", $compose_filename
690                 or die "Failed to open $compose_filename : " . $!;
691
692         my $need_8bit_cte = file_has_nonascii($compose_filename);
693         my $in_body = 0;
694         my $summary_empty = 1;
695         if (!defined $compose_encoding) {
696                 $compose_encoding = "UTF-8";
697         }
698         while(<$c>) {
699                 next if m/^GIT:/;
700                 if ($in_body) {
701                         $summary_empty = 0 unless (/^\n$/);
702                 } elsif (/^\n$/) {
703                         $in_body = 1;
704                         if ($need_8bit_cte) {
705                                 print $c2 "MIME-Version: 1.0\n",
706                                          "Content-Type: text/plain; ",
707                                            "charset=$compose_encoding\n",
708                                          "Content-Transfer-Encoding: 8bit\n";
709                         }
710                 } elsif (/^MIME-Version:/i) {
711                         $need_8bit_cte = 0;
712                 } elsif (/^Subject:\s*(.+)\s*$/i) {
713                         $initial_subject = $1;
714                         my $subject = $initial_subject;
715                         $_ = "Subject: " .
716                                 quote_subject($subject, $compose_encoding) .
717                                 "\n";
718                 } elsif (/^In-Reply-To:\s*(.+)\s*$/i) {
719                         $initial_reply_to = $1;
720                         next;
721                 } elsif (/^From:\s*(.+)\s*$/i) {
722                         $sender = $1;
723                         next;
724                 } elsif (/^(?:To|Cc|Bcc):/i) {
725                         print "To/Cc/Bcc fields are not interpreted yet, they have been ignored\n";
726                         next;
727                 }
728                 print $c2 $_;
729         }
730         close $c;
731         close $c2;
732
733         if ($summary_empty) {
734                 print "Summary email is empty, skipping it\n";
735                 $compose = -1;
736         }
737 } elsif ($annotate) {
738         do_edit(@files);
739 }
740
741 sub ask {
742         my ($prompt, %arg) = @_;
743         my $valid_re = $arg{valid_re};
744         my $default = $arg{default};
745         my $confirm_only = $arg{confirm_only};
746         my $resp;
747         my $i = 0;
748         return defined $default ? $default : undef
749                 unless defined $term->IN and defined fileno($term->IN) and
750                        defined $term->OUT and defined fileno($term->OUT);
751         while ($i++ < 10) {
752                 $resp = $term->readline($prompt);
753                 if (!defined $resp) { # EOF
754                         print "\n";
755                         return defined $default ? $default : undef;
756                 }
757                 if ($resp eq '' and defined $default) {
758                         return $default;
759                 }
760                 if (!defined $valid_re or $resp =~ /$valid_re/) {
761                         return $resp;
762                 }
763                 if ($confirm_only) {
764                         my $yesno = $term->readline("Are you sure you want to use <$resp> [y/N]? ");
765                         if (defined $yesno && $yesno =~ /y/i) {
766                                 return $resp;
767                         }
768                 }
769         }
770         return;
771 }
772
773 my %broken_encoding;
774
775 sub file_declares_8bit_cte {
776         my $fn = shift;
777         open (my $fh, '<', $fn);
778         while (my $line = <$fh>) {
779                 last if ($line =~ /^$/);
780                 return 1 if ($line =~ /^Content-Transfer-Encoding: .*8bit.*$/);
781         }
782         close $fh;
783         return 0;
784 }
785
786 foreach my $f (@files) {
787         next unless (body_or_subject_has_nonascii($f)
788                      && !file_declares_8bit_cte($f));
789         $broken_encoding{$f} = 1;
790 }
791
792 if (!defined $auto_8bit_encoding && scalar %broken_encoding) {
793         print "The following files are 8bit, but do not declare " .
794                 "a Content-Transfer-Encoding.\n";
795         foreach my $f (sort keys %broken_encoding) {
796                 print "    $f\n";
797         }
798         $auto_8bit_encoding = ask("Which 8bit encoding should I declare [UTF-8]? ",
799                                   valid_re => qr/.{4}/, confirm_only => 1,
800                                   default => "UTF-8");
801 }
802
803 if (!$force) {
804         for my $f (@files) {
805                 if (get_patch_subject($f) =~ /\Q*** SUBJECT HERE ***\E/) {
806                         die "Refusing to send because the patch\n\t$f\n"
807                                 . "has the template subject '*** SUBJECT HERE ***'. "
808                                 . "Pass --force if you really want to send.\n";
809                 }
810         }
811 }
812
813 if (defined $sender) {
814         $sender =~ s/^\s+|\s+$//g;
815         ($sender) = expand_aliases($sender);
816 } else {
817         $sender = $repoauthor || $repocommitter || '';
818 }
819
820 # $sender could be an already sanitized address
821 # (e.g. sendemail.from could be manually sanitized by user).
822 # But it's a no-op to run sanitize_address on an already sanitized address.
823 $sender = sanitize_address($sender);
824
825 my $prompting = 0;
826 if (!@initial_to && !defined $to_cmd) {
827         my $to = ask("Who should the emails be sent to (if any)? ",
828                      default => "",
829                      valid_re => qr/\@.*\./, confirm_only => 1);
830         push @initial_to, parse_address_line($to) if defined $to; # sanitized/validated later
831         $prompting++;
832 }
833
834 sub expand_aliases {
835         return map { expand_one_alias($_) } @_;
836 }
837
838 my %EXPANDED_ALIASES;
839 sub expand_one_alias {
840         my $alias = shift;
841         if ($EXPANDED_ALIASES{$alias}) {
842                 die "fatal: alias '$alias' expands to itself\n";
843         }
844         local $EXPANDED_ALIASES{$alias} = 1;
845         return $aliases{$alias} ? expand_aliases(@{$aliases{$alias}}) : $alias;
846 }
847
848 @initial_to = process_address_list(@initial_to);
849 @initial_cc = process_address_list(@initial_cc);
850 @bcclist = process_address_list(@bcclist);
851
852 if ($thread && !defined $initial_reply_to && $prompting) {
853         $initial_reply_to = ask(
854                 "Message-ID to be used as In-Reply-To for the first email (if any)? ",
855                 default => "",
856                 valid_re => qr/\@.*\./, confirm_only => 1);
857 }
858 if (defined $initial_reply_to) {
859         $initial_reply_to =~ s/^\s*<?//;
860         $initial_reply_to =~ s/>?\s*$//;
861         $initial_reply_to = "<$initial_reply_to>" if $initial_reply_to ne '';
862 }
863
864 if (!defined $smtp_server) {
865         foreach (qw( /usr/sbin/sendmail /usr/lib/sendmail )) {
866                 if (-x $_) {
867                         $smtp_server = $_;
868                         last;
869                 }
870         }
871         $smtp_server ||= 'localhost'; # could be 127.0.0.1, too... *shrug*
872 }
873
874 if ($compose && $compose > 0) {
875         @files = ($compose_filename . ".final", @files);
876 }
877
878 # Variables we set as part of the loop over files
879 our ($message_id, %mail, $subject, $reply_to, $references, $message,
880         $needs_confirm, $message_num, $ask_default);
881
882 sub extract_valid_address {
883         my $address = shift;
884         my $local_part_regexp = qr/[^<>"\s@]+/;
885         my $domain_regexp = qr/[^.<>"\s@]+(?:\.[^.<>"\s@]+)+/;
886
887         # check for a local address:
888         return $address if ($address =~ /^($local_part_regexp)$/);
889
890         $address =~ s/^\s*<(.*)>\s*$/$1/;
891         if ($have_email_valid) {
892                 return scalar Email::Valid->address($address);
893         }
894
895         # less robust/correct than the monster regexp in Email::Valid,
896         # but still does a 99% job, and one less dependency
897         return $1 if $address =~ /($local_part_regexp\@$domain_regexp)/;
898         return;
899 }
900
901 sub extract_valid_address_or_die {
902         my $address = shift;
903         $address = extract_valid_address($address);
904         die "error: unable to extract a valid address from: $address\n"
905                 if !$address;
906         return $address;
907 }
908
909 sub validate_address {
910         my $address = shift;
911         while (!extract_valid_address($address)) {
912                 print STDERR "error: unable to extract a valid address from: $address\n";
913                 $_ = ask("What to do with this address? ([q]uit|[d]rop|[e]dit): ",
914                         valid_re => qr/^(?:quit|q|drop|d|edit|e)/i,
915                         default => 'q');
916                 if (/^d/i) {
917                         return undef;
918                 } elsif (/^q/i) {
919                         cleanup_compose_files();
920                         exit(0);
921                 }
922                 $address = ask("Who should the email be sent to (if any)? ",
923                         default => "",
924                         valid_re => qr/\@.*\./, confirm_only => 1);
925         }
926         return $address;
927 }
928
929 sub validate_address_list {
930         return (grep { defined $_ }
931                 map { validate_address($_) } @_);
932 }
933
934 # Usually don't need to change anything below here.
935
936 # we make a "fake" message id by taking the current number
937 # of seconds since the beginning of Unix time and tacking on
938 # a random number to the end, in case we are called quicker than
939 # 1 second since the last time we were called.
940
941 # We'll setup a template for the message id, using the "from" address:
942
943 my ($message_id_stamp, $message_id_serial);
944 sub make_message_id {
945         my $uniq;
946         if (!defined $message_id_stamp) {
947                 $message_id_stamp = sprintf("%s-%s", time, $$);
948                 $message_id_serial = 0;
949         }
950         $message_id_serial++;
951         $uniq = "$message_id_stamp-$message_id_serial";
952
953         my $du_part;
954         for ($sender, $repocommitter, $repoauthor) {
955                 $du_part = extract_valid_address(sanitize_address($_));
956                 last if (defined $du_part and $du_part ne '');
957         }
958         if (not defined $du_part or $du_part eq '') {
959                 require Sys::Hostname;
960                 $du_part = 'user@' . Sys::Hostname::hostname();
961         }
962         my $message_id_template = "<%s-git-send-email-%s>";
963         $message_id = sprintf($message_id_template, $uniq, $du_part);
964         #print "new message id = $message_id\n"; # Was useful for debugging
965 }
966
967
968
969 $time = time - scalar $#files;
970
971 sub unquote_rfc2047 {
972         local ($_) = @_;
973         my $charset;
974         my $sep = qr/[ \t]+/;
975         s{$re_encoded_word(?:$sep$re_encoded_word)*}{
976                 my @words = split $sep, $&;
977                 foreach (@words) {
978                         m/$re_encoded_word/;
979                         $charset = $1;
980                         my $encoding = $2;
981                         my $text = $3;
982                         if ($encoding eq 'q' || $encoding eq 'Q') {
983                                 $_ = $text;
984                                 s/_/ /g;
985                                 s/=([0-9A-F]{2})/chr(hex($1))/egi;
986                         } else {
987                                 # other encodings not supported yet
988                         }
989                 }
990                 join '', @words;
991         }eg;
992         return wantarray ? ($_, $charset) : $_;
993 }
994
995 sub quote_rfc2047 {
996         local $_ = shift;
997         my $encoding = shift || 'UTF-8';
998         s/([^-a-zA-Z0-9!*+\/])/sprintf("=%02X", ord($1))/eg;
999         s/(.*)/=\?$encoding\?q\?$1\?=/;
1000         return $_;
1001 }
1002
1003 sub is_rfc2047_quoted {
1004         my $s = shift;
1005         length($s) <= 75 &&
1006         $s =~ m/^(?:"[[:ascii:]]*"|$re_encoded_word)$/o;
1007 }
1008
1009 sub subject_needs_rfc2047_quoting {
1010         my $s = shift;
1011
1012         return ($s =~ /[^[:ascii:]]/) || ($s =~ /=\?/);
1013 }
1014
1015 sub quote_subject {
1016         local $subject = shift;
1017         my $encoding = shift || 'UTF-8';
1018
1019         if (subject_needs_rfc2047_quoting($subject)) {
1020                 return quote_rfc2047($subject, $encoding);
1021         }
1022         return $subject;
1023 }
1024
1025 # use the simplest quoting being able to handle the recipient
1026 sub sanitize_address {
1027         my ($recipient) = @_;
1028
1029         # remove garbage after email address
1030         $recipient =~ s/(.*>).*$/$1/;
1031
1032         my ($recipient_name, $recipient_addr) = ($recipient =~ /^(.*?)\s*(<.*)/);
1033
1034         if (not $recipient_name) {
1035                 return $recipient;
1036         }
1037
1038         # if recipient_name is already quoted, do nothing
1039         if (is_rfc2047_quoted($recipient_name)) {
1040                 return $recipient;
1041         }
1042
1043         # remove non-escaped quotes
1044         $recipient_name =~ s/(^|[^\\])"/$1/g;
1045
1046         # rfc2047 is needed if a non-ascii char is included
1047         if ($recipient_name =~ /[^[:ascii:]]/) {
1048                 $recipient_name = quote_rfc2047($recipient_name);
1049         }
1050
1051         # double quotes are needed if specials or CTLs are included
1052         elsif ($recipient_name =~ /[][()<>@,;:\\".\000-\037\177]/) {
1053                 $recipient_name =~ s/([\\\r])/\\$1/g;
1054                 $recipient_name = qq["$recipient_name"];
1055         }
1056
1057         return "$recipient_name $recipient_addr";
1058
1059 }
1060
1061 sub sanitize_address_list {
1062         return (map { sanitize_address($_) } @_);
1063 }
1064
1065 sub process_address_list {
1066         my @addr_list = map { parse_address_line($_) } @_;
1067         @addr_list = expand_aliases(@addr_list);
1068         @addr_list = sanitize_address_list(@addr_list);
1069         @addr_list = validate_address_list(@addr_list);
1070         return @addr_list;
1071 }
1072
1073 # Returns the local Fully Qualified Domain Name (FQDN) if available.
1074 #
1075 # Tightly configured MTAa require that a caller sends a real DNS
1076 # domain name that corresponds the IP address in the HELO/EHLO
1077 # handshake. This is used to verify the connection and prevent
1078 # spammers from trying to hide their identity. If the DNS and IP don't
1079 # match, the receiveing MTA may deny the connection.
1080 #
1081 # Here is a deny example of Net::SMTP with the default "localhost.localdomain"
1082 #
1083 # Net::SMTP=GLOB(0x267ec28)>>> EHLO localhost.localdomain
1084 # Net::SMTP=GLOB(0x267ec28)<<< 550 EHLO argument does not match calling host
1085 #
1086 # This maildomain*() code is based on ideas in Perl library Test::Reporter
1087 # /usr/share/perl5/Test/Reporter/Mail/Util.pm ==> sub _maildomain ()
1088
1089 sub valid_fqdn {
1090         my $domain = shift;
1091         return defined $domain && !($^O eq 'darwin' && $domain =~ /\.local$/) && $domain =~ /\./;
1092 }
1093
1094 sub maildomain_net {
1095         my $maildomain;
1096
1097         if (eval { require Net::Domain; 1 }) {
1098                 my $domain = Net::Domain::domainname();
1099                 $maildomain = $domain if valid_fqdn($domain);
1100         }
1101
1102         return $maildomain;
1103 }
1104
1105 sub maildomain_mta {
1106         my $maildomain;
1107
1108         if (eval { require Net::SMTP; 1 }) {
1109                 for my $host (qw(mailhost localhost)) {
1110                         my $smtp = Net::SMTP->new($host);
1111                         if (defined $smtp) {
1112                                 my $domain = $smtp->domain;
1113                                 $smtp->quit;
1114
1115                                 $maildomain = $domain if valid_fqdn($domain);
1116
1117                                 last if $maildomain;
1118                         }
1119                 }
1120         }
1121
1122         return $maildomain;
1123 }
1124
1125 sub maildomain {
1126         return maildomain_net() || maildomain_mta() || 'localhost.localdomain';
1127 }
1128
1129 sub smtp_host_string {
1130         if (defined $smtp_server_port) {
1131                 return "$smtp_server:$smtp_server_port";
1132         } else {
1133                 return $smtp_server;
1134         }
1135 }
1136
1137 # Returns 1 if authentication succeeded or was not necessary
1138 # (smtp_user was not specified), and 0 otherwise.
1139
1140 sub smtp_auth_maybe {
1141         if (!defined $smtp_authuser || $auth) {
1142                 return 1;
1143         }
1144
1145         # Workaround AUTH PLAIN/LOGIN interaction defect
1146         # with Authen::SASL::Cyrus
1147         eval {
1148                 require Authen::SASL;
1149                 Authen::SASL->import(qw(Perl));
1150         };
1151
1152         # Check mechanism naming as defined in:
1153         # https://tools.ietf.org/html/rfc4422#page-8
1154         if ($smtp_auth && $smtp_auth !~ /^(\b[A-Z0-9-_]{1,20}\s*)*$/) {
1155                 die "invalid smtp auth: '${smtp_auth}'";
1156         }
1157
1158         # TODO: Authentication may fail not because credentials were
1159         # invalid but due to other reasons, in which we should not
1160         # reject credentials.
1161         $auth = Git::credential({
1162                 'protocol' => 'smtp',
1163                 'host' => smtp_host_string(),
1164                 'username' => $smtp_authuser,
1165                 # if there's no password, "git credential fill" will
1166                 # give us one, otherwise it'll just pass this one.
1167                 'password' => $smtp_authpass
1168         }, sub {
1169                 my $cred = shift;
1170
1171                 if ($smtp_auth) {
1172                         my $sasl = Authen::SASL->new(
1173                                 mechanism => $smtp_auth,
1174                                 callback => {
1175                                         user => $cred->{'username'},
1176                                         pass => $cred->{'password'},
1177                                         authname => $cred->{'username'},
1178                                 }
1179                         );
1180
1181                         return !!$smtp->auth($sasl);
1182                 }
1183
1184                 return !!$smtp->auth($cred->{'username'}, $cred->{'password'});
1185         });
1186
1187         return $auth;
1188 }
1189
1190 sub ssl_verify_params {
1191         eval {
1192                 require IO::Socket::SSL;
1193                 IO::Socket::SSL->import(qw/SSL_VERIFY_PEER SSL_VERIFY_NONE/);
1194         };
1195         if ($@) {
1196                 print STDERR "Not using SSL_VERIFY_PEER due to out-of-date IO::Socket::SSL.\n";
1197                 return;
1198         }
1199
1200         if (!defined $smtp_ssl_cert_path) {
1201                 # use the OpenSSL defaults
1202                 return (SSL_verify_mode => SSL_VERIFY_PEER());
1203         }
1204
1205         if ($smtp_ssl_cert_path eq "") {
1206                 return (SSL_verify_mode => SSL_VERIFY_NONE());
1207         } elsif (-d $smtp_ssl_cert_path) {
1208                 return (SSL_verify_mode => SSL_VERIFY_PEER(),
1209                         SSL_ca_path => $smtp_ssl_cert_path);
1210         } elsif (-f $smtp_ssl_cert_path) {
1211                 return (SSL_verify_mode => SSL_VERIFY_PEER(),
1212                         SSL_ca_file => $smtp_ssl_cert_path);
1213         } else {
1214                 die "CA path \"$smtp_ssl_cert_path\" does not exist";
1215         }
1216 }
1217
1218 sub file_name_is_absolute {
1219         my ($path) = @_;
1220
1221         # msys does not grok DOS drive-prefixes
1222         if ($^O eq 'msys') {
1223                 return ($path =~ m#^/# || $path =~ m#^[a-zA-Z]\:#)
1224         }
1225
1226         require File::Spec::Functions;
1227         return File::Spec::Functions::file_name_is_absolute($path);
1228 }
1229
1230 # Returns 1 if the message was sent, and 0 otherwise.
1231 # In actuality, the whole program dies when there
1232 # is an error sending a message.
1233
1234 sub send_message {
1235         my @recipients = unique_email_list(@to);
1236         @cc = (grep { my $cc = extract_valid_address_or_die($_);
1237                       not grep { $cc eq $_ || $_ =~ /<\Q${cc}\E>$/ } @recipients
1238                     }
1239                @cc);
1240         my $to = join (",\n\t", @recipients);
1241         @recipients = unique_email_list(@recipients,@cc,@bcclist);
1242         @recipients = (map { extract_valid_address_or_die($_) } @recipients);
1243         my $date = format_2822_time($time++);
1244         my $gitversion = '@@GIT_VERSION@@';
1245         if ($gitversion =~ m/..GIT_VERSION../) {
1246             $gitversion = Git::version();
1247         }
1248
1249         my $cc = join(",\n\t", unique_email_list(@cc));
1250         my $ccline = "";
1251         if ($cc ne '') {
1252                 $ccline = "\nCc: $cc";
1253         }
1254         make_message_id() unless defined($message_id);
1255
1256         my $header = "From: $sender
1257 To: $to${ccline}
1258 Subject: $subject
1259 Date: $date
1260 Message-Id: $message_id
1261 ";
1262         if ($use_xmailer) {
1263                 $header .= "X-Mailer: git-send-email $gitversion\n";
1264         }
1265         if ($reply_to) {
1266
1267                 $header .= "In-Reply-To: $reply_to\n";
1268                 $header .= "References: $references\n";
1269         }
1270         if (@xh) {
1271                 $header .= join("\n", @xh) . "\n";
1272         }
1273
1274         my @sendmail_parameters = ('-i', @recipients);
1275         my $raw_from = $sender;
1276         if (defined $envelope_sender && $envelope_sender ne "auto") {
1277                 $raw_from = $envelope_sender;
1278         }
1279         $raw_from = extract_valid_address($raw_from);
1280         unshift (@sendmail_parameters,
1281                         '-f', $raw_from) if(defined $envelope_sender);
1282
1283         if ($needs_confirm && !$dry_run) {
1284                 print "\n$header\n";
1285                 if ($needs_confirm eq "inform") {
1286                         $confirm_unconfigured = 0; # squelch this message for the rest of this run
1287                         $ask_default = "y"; # assume yes on EOF since user hasn't explicitly asked for confirmation
1288                         print "    The Cc list above has been expanded by additional\n";
1289                         print "    addresses found in the patch commit message. By default\n";
1290                         print "    send-email prompts before sending whenever this occurs.\n";
1291                         print "    This behavior is controlled by the sendemail.confirm\n";
1292                         print "    configuration setting.\n";
1293                         print "\n";
1294                         print "    For additional information, run 'git send-email --help'.\n";
1295                         print "    To retain the current behavior, but squelch this message,\n";
1296                         print "    run 'git config --global sendemail.confirm auto'.\n\n";
1297                 }
1298                 $_ = ask("Send this email? ([y]es|[n]o|[q]uit|[a]ll): ",
1299                          valid_re => qr/^(?:yes|y|no|n|quit|q|all|a)/i,
1300                          default => $ask_default);
1301                 die "Send this email reply required" unless defined $_;
1302                 if (/^n/i) {
1303                         return 0;
1304                 } elsif (/^q/i) {
1305                         cleanup_compose_files();
1306                         exit(0);
1307                 } elsif (/^a/i) {
1308                         $confirm = 'never';
1309                 }
1310         }
1311
1312         unshift (@sendmail_parameters, @smtp_server_options);
1313
1314         if ($dry_run) {
1315                 # We don't want to send the email.
1316         } elsif (file_name_is_absolute($smtp_server)) {
1317                 my $pid = open my $sm, '|-';
1318                 defined $pid or die $!;
1319                 if (!$pid) {
1320                         exec($smtp_server, @sendmail_parameters) or die $!;
1321                 }
1322                 print $sm "$header\n$message";
1323                 close $sm or die $!;
1324         } else {
1325
1326                 if (!defined $smtp_server) {
1327                         die "The required SMTP server is not properly defined."
1328                 }
1329
1330                 if ($smtp_encryption eq 'ssl') {
1331                         $smtp_server_port ||= 465; # ssmtp
1332                         require Net::SMTP::SSL;
1333                         $smtp_domain ||= maildomain();
1334                         require IO::Socket::SSL;
1335                         # Net::SMTP::SSL->new() does not forward any SSL options
1336                         IO::Socket::SSL::set_client_defaults(
1337                                 ssl_verify_params());
1338                         $smtp ||= Net::SMTP::SSL->new($smtp_server,
1339                                                       Hello => $smtp_domain,
1340                                                       Port => $smtp_server_port,
1341                                                       Debug => $debug_net_smtp);
1342                 }
1343                 else {
1344                         require Net::SMTP;
1345                         $smtp_domain ||= maildomain();
1346                         $smtp_server_port ||= 25;
1347                         $smtp ||= Net::SMTP->new($smtp_server,
1348                                                  Hello => $smtp_domain,
1349                                                  Debug => $debug_net_smtp,
1350                                                  Port => $smtp_server_port);
1351                         if ($smtp_encryption eq 'tls' && $smtp) {
1352                                 require Net::SMTP::SSL;
1353                                 $smtp->command('STARTTLS');
1354                                 $smtp->response();
1355                                 if ($smtp->code == 220) {
1356                                         $smtp = Net::SMTP::SSL->start_SSL($smtp,
1357                                                                           ssl_verify_params())
1358                                                 or die "STARTTLS failed! ".IO::Socket::SSL::errstr();
1359                                         $smtp_encryption = '';
1360                                         # Send EHLO again to receive fresh
1361                                         # supported commands
1362                                         $smtp->hello($smtp_domain);
1363                                 } else {
1364                                         die "Server does not support STARTTLS! ".$smtp->message;
1365                                 }
1366                         }
1367                 }
1368
1369                 if (!$smtp) {
1370                         die "Unable to initialize SMTP properly. Check config and use --smtp-debug. ",
1371                             "VALUES: server=$smtp_server ",
1372                             "encryption=$smtp_encryption ",
1373                             "hello=$smtp_domain",
1374                             defined $smtp_server_port ? " port=$smtp_server_port" : "";
1375                 }
1376
1377                 smtp_auth_maybe or die $smtp->message;
1378
1379                 $smtp->mail( $raw_from ) or die $smtp->message;
1380                 $smtp->to( @recipients ) or die $smtp->message;
1381                 $smtp->data or die $smtp->message;
1382                 $smtp->datasend("$header\n") or die $smtp->message;
1383                 my @lines = split /^/, $message;
1384                 foreach my $line (@lines) {
1385                         $smtp->datasend("$line") or die $smtp->message;
1386                 }
1387                 $smtp->dataend() or die $smtp->message;
1388                 $smtp->code =~ /250|200/ or die "Failed to send $subject\n".$smtp->message;
1389         }
1390         if ($quiet) {
1391                 printf (($dry_run ? "Dry-" : "")."Sent %s\n", $subject);
1392         } else {
1393                 print (($dry_run ? "Dry-" : "")."OK. Log says:\n");
1394                 if (!file_name_is_absolute($smtp_server)) {
1395                         print "Server: $smtp_server\n";
1396                         print "MAIL FROM:<$raw_from>\n";
1397                         foreach my $entry (@recipients) {
1398                             print "RCPT TO:<$entry>\n";
1399                         }
1400                 } else {
1401                         print "Sendmail: $smtp_server ".join(' ',@sendmail_parameters)."\n";
1402                 }
1403                 print $header, "\n";
1404                 if ($smtp) {
1405                         print "Result: ", $smtp->code, ' ',
1406                                 ($smtp->message =~ /\n([^\n]+\n)$/s), "\n";
1407                 } else {
1408                         print "Result: OK\n";
1409                 }
1410         }
1411
1412         return 1;
1413 }
1414
1415 $reply_to = $initial_reply_to;
1416 $references = $initial_reply_to || '';
1417 $subject = $initial_subject;
1418 $message_num = 0;
1419
1420 foreach my $t (@files) {
1421         open my $fh, "<", $t or die "can't open file $t";
1422
1423         my $author = undef;
1424         my $sauthor = undef;
1425         my $author_encoding;
1426         my $has_content_type;
1427         my $body_encoding;
1428         my $xfer_encoding;
1429         my $has_mime_version;
1430         @to = ();
1431         @cc = ();
1432         @xh = ();
1433         my $input_format = undef;
1434         my @header = ();
1435         $message = "";
1436         $message_num++;
1437         # First unfold multiline header fields
1438         while(<$fh>) {
1439                 last if /^\s*$/;
1440                 if (/^\s+\S/ and @header) {
1441                         chomp($header[$#header]);
1442                         s/^\s+/ /;
1443                         $header[$#header] .= $_;
1444             } else {
1445                         push(@header, $_);
1446                 }
1447         }
1448         # Now parse the header
1449         foreach(@header) {
1450                 if (/^From /) {
1451                         $input_format = 'mbox';
1452                         next;
1453                 }
1454                 chomp;
1455                 if (!defined $input_format && /^[-A-Za-z]+:\s/) {
1456                         $input_format = 'mbox';
1457                 }
1458
1459                 if (defined $input_format && $input_format eq 'mbox') {
1460                         if (/^Subject:\s+(.*)$/i) {
1461                                 $subject = $1;
1462                         }
1463                         elsif (/^From:\s+(.*)$/i) {
1464                                 ($author, $author_encoding) = unquote_rfc2047($1);
1465                                 $sauthor = sanitize_address($author);
1466                                 next if $suppress_cc{'author'};
1467                                 next if $suppress_cc{'self'} and $sauthor eq $sender;
1468                                 printf("(mbox) Adding cc: %s from line '%s'\n",
1469                                         $1, $_) unless $quiet;
1470                                 push @cc, $1;
1471                         }
1472                         elsif (/^To:\s+(.*)$/i) {
1473                                 foreach my $addr (parse_address_line($1)) {
1474                                         printf("(mbox) Adding to: %s from line '%s'\n",
1475                                                 $addr, $_) unless $quiet;
1476                                         push @to, $addr;
1477                                 }
1478                         }
1479                         elsif (/^Cc:\s+(.*)$/i) {
1480                                 foreach my $addr (parse_address_line($1)) {
1481                                         my $qaddr = unquote_rfc2047($addr);
1482                                         my $saddr = sanitize_address($qaddr);
1483                                         if ($saddr eq $sender) {
1484                                                 next if ($suppress_cc{'self'});
1485                                         } else {
1486                                                 next if ($suppress_cc{'cc'});
1487                                         }
1488                                         printf("(mbox) Adding cc: %s from line '%s'\n",
1489                                                 $addr, $_) unless $quiet;
1490                                         push @cc, $addr;
1491                                 }
1492                         }
1493                         elsif (/^Content-type:/i) {
1494                                 $has_content_type = 1;
1495                                 if (/charset="?([^ "]+)/) {
1496                                         $body_encoding = $1;
1497                                 }
1498                                 push @xh, $_;
1499                         }
1500                         elsif (/^MIME-Version/i) {
1501                                 $has_mime_version = 1;
1502                                 push @xh, $_;
1503                         }
1504                         elsif (/^Message-Id: (.*)/i) {
1505                                 $message_id = $1;
1506                         }
1507                         elsif (/^Content-Transfer-Encoding: (.*)/i) {
1508                                 $xfer_encoding = $1 if not defined $xfer_encoding;
1509                         }
1510                         elsif (!/^Date:\s/i && /^[-A-Za-z]+:\s+\S/) {
1511                                 push @xh, $_;
1512                         }
1513
1514                 } else {
1515                         # In the traditional
1516                         # "send lots of email" format,
1517                         # line 1 = cc
1518                         # line 2 = subject
1519                         # So let's support that, too.
1520                         $input_format = 'lots';
1521                         if (@cc == 0 && !$suppress_cc{'cc'}) {
1522                                 printf("(non-mbox) Adding cc: %s from line '%s'\n",
1523                                         $_, $_) unless $quiet;
1524                                 push @cc, $_;
1525                         } elsif (!defined $subject) {
1526                                 $subject = $_;
1527                         }
1528                 }
1529         }
1530         # Now parse the message body
1531         while(<$fh>) {
1532                 $message .=  $_;
1533                 if (/^(Signed-off-by|Cc): (.*)$/i) {
1534                         chomp;
1535                         my ($what, $c) = ($1, $2);
1536                         chomp $c;
1537                         my $sc = sanitize_address($c);
1538                         if ($sc eq $sender) {
1539                                 next if ($suppress_cc{'self'});
1540                         } else {
1541                                 next if $suppress_cc{'sob'} and $what =~ /Signed-off-by/i;
1542                                 next if $suppress_cc{'bodycc'} and $what =~ /Cc/i;
1543                         }
1544                         push @cc, $c;
1545                         printf("(body) Adding cc: %s from line '%s'\n",
1546                                 $c, $_) unless $quiet;
1547                 }
1548         }
1549         close $fh;
1550
1551         push @to, recipients_cmd("to-cmd", "to", $to_cmd, $t)
1552                 if defined $to_cmd;
1553         push @cc, recipients_cmd("cc-cmd", "cc", $cc_cmd, $t)
1554                 if defined $cc_cmd && !$suppress_cc{'cccmd'};
1555
1556         if ($broken_encoding{$t} && !$has_content_type) {
1557                 $xfer_encoding = '8bit' if not defined $xfer_encoding;
1558                 $has_content_type = 1;
1559                 push @xh, "Content-Type: text/plain; charset=$auto_8bit_encoding";
1560                 $body_encoding = $auto_8bit_encoding;
1561         }
1562
1563         if ($broken_encoding{$t} && !is_rfc2047_quoted($subject)) {
1564                 $subject = quote_subject($subject, $auto_8bit_encoding);
1565         }
1566
1567         if (defined $sauthor and $sauthor ne $sender) {
1568                 $message = "From: $author\n\n$message";
1569                 if (defined $author_encoding) {
1570                         if ($has_content_type) {
1571                                 if ($body_encoding eq $author_encoding) {
1572                                         # ok, we already have the right encoding
1573                                 }
1574                                 else {
1575                                         # uh oh, we should re-encode
1576                                 }
1577                         }
1578                         else {
1579                                 $xfer_encoding = '8bit' if not defined $xfer_encoding;
1580                                 $has_content_type = 1;
1581                                 push @xh,
1582                                   "Content-Type: text/plain; charset=$author_encoding";
1583                         }
1584                 }
1585         }
1586         if (defined $target_xfer_encoding) {
1587                 $xfer_encoding = '8bit' if not defined $xfer_encoding;
1588                 $message = apply_transfer_encoding(
1589                         $message, $xfer_encoding, $target_xfer_encoding);
1590                 $xfer_encoding = $target_xfer_encoding;
1591         }
1592         if (defined $xfer_encoding) {
1593                 push @xh, "Content-Transfer-Encoding: $xfer_encoding";
1594         }
1595         if (defined $xfer_encoding or $has_content_type) {
1596                 unshift @xh, 'MIME-Version: 1.0' unless $has_mime_version;
1597         }
1598
1599         $needs_confirm = (
1600                 $confirm eq "always" or
1601                 ($confirm =~ /^(?:auto|cc)$/ && @cc) or
1602                 ($confirm =~ /^(?:auto|compose)$/ && $compose && $message_num == 1));
1603         $needs_confirm = "inform" if ($needs_confirm && $confirm_unconfigured && @cc);
1604
1605         @to = process_address_list(@to);
1606         @cc = process_address_list(@cc);
1607
1608         @to = (@initial_to, @to);
1609         @cc = (@initial_cc, @cc);
1610
1611         if ($message_num == 1) {
1612                 if (defined $cover_cc and $cover_cc) {
1613                         @initial_cc = @cc;
1614                 }
1615                 if (defined $cover_to and $cover_to) {
1616                         @initial_to = @to;
1617                 }
1618         }
1619
1620         my $message_was_sent = send_message();
1621
1622         # set up for the next message
1623         if ($thread && $message_was_sent &&
1624                 ($chain_reply_to || !defined $reply_to || length($reply_to) == 0 ||
1625                 $message_num == 1)) {
1626                 $reply_to = $message_id;
1627                 if (length $references > 0) {
1628                         $references .= "\n $message_id";
1629                 } else {
1630                         $references = "$message_id";
1631                 }
1632         }
1633         $message_id = undef;
1634 }
1635
1636 # Execute a command (e.g. $to_cmd) to get a list of email addresses
1637 # and return a results array
1638 sub recipients_cmd {
1639         my ($prefix, $what, $cmd, $file) = @_;
1640
1641         my @addresses = ();
1642         open my $fh, "-|", "$cmd \Q$file\E"
1643             or die "($prefix) Could not execute '$cmd'";
1644         while (my $address = <$fh>) {
1645                 $address =~ s/^\s*//g;
1646                 $address =~ s/\s*$//g;
1647                 $address = sanitize_address($address);
1648                 next if ($address eq $sender and $suppress_cc{'self'});
1649                 push @addresses, $address;
1650                 printf("($prefix) Adding %s: %s from: '%s'\n",
1651                        $what, $address, $cmd) unless $quiet;
1652                 }
1653         close $fh
1654             or die "($prefix) failed to close pipe to '$cmd'";
1655         return @addresses;
1656 }
1657
1658 cleanup_compose_files();
1659
1660 sub cleanup_compose_files {
1661         unlink($compose_filename, $compose_filename . ".final") if $compose;
1662 }
1663
1664 $smtp->quit if $smtp;
1665
1666 sub apply_transfer_encoding {
1667         my $message = shift;
1668         my $from = shift;
1669         my $to = shift;
1670
1671         return $message if ($from eq $to and $from ne '7bit');
1672
1673         require MIME::QuotedPrint;
1674         require MIME::Base64;
1675
1676         $message = MIME::QuotedPrint::decode($message)
1677                 if ($from eq 'quoted-printable');
1678         $message = MIME::Base64::decode($message)
1679                 if ($from eq 'base64');
1680
1681         die "cannot send message as 7bit"
1682                 if ($to eq '7bit' and $message =~ /[^[:ascii:]]/);
1683         return $message
1684                 if ($to eq '7bit' or $to eq '8bit');
1685         return MIME::QuotedPrint::encode($message, "\n", 0)
1686                 if ($to eq 'quoted-printable');
1687         return MIME::Base64::encode($message, "\n")
1688                 if ($to eq 'base64');
1689         die "invalid transfer encoding";
1690 }
1691
1692 sub unique_email_list {
1693         my %seen;
1694         my @emails;
1695
1696         foreach my $entry (@_) {
1697                 my $clean = extract_valid_address_or_die($entry);
1698                 $seen{$clean} ||= 0;
1699                 next if $seen{$clean}++;
1700                 push @emails, $entry;
1701         }
1702         return @emails;
1703 }
1704
1705 sub validate_patch {
1706         my $fn = shift;
1707         open(my $fh, '<', $fn)
1708                 or die "unable to open $fn: $!\n";
1709         while (my $line = <$fh>) {
1710                 if (length($line) > 998) {
1711                         return "$.: patch contains a line longer than 998 characters";
1712                 }
1713         }
1714         return;
1715 }
1716
1717 sub file_has_nonascii {
1718         my $fn = shift;
1719         open(my $fh, '<', $fn)
1720                 or die "unable to open $fn: $!\n";
1721         while (my $line = <$fh>) {
1722                 return 1 if $line =~ /[^[:ascii:]]/;
1723         }
1724         return 0;
1725 }
1726
1727 sub body_or_subject_has_nonascii {
1728         my $fn = shift;
1729         open(my $fh, '<', $fn)
1730                 or die "unable to open $fn: $!\n";
1731         while (my $line = <$fh>) {
1732                 last if $line =~ /^$/;
1733                 return 1 if $line =~ /^Subject.*[^[:ascii:]]/;
1734         }
1735         while (my $line = <$fh>) {
1736                 return 1 if $line =~ /[^[:ascii:]]/;
1737         }
1738         return 0;
1739 }