Merge branch 'mh/diff-indent-heuristic'
[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 POSIX qw/strftime/;
23 use Term::ReadLine;
24 use Getopt::Long;
25 use Text::ParseWords;
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                         my @addr = split_addrs($addr);
529
530                         # quotes may be escaped in the file,
531                         # unescape them so we do not double-escape them later.
532                         s/\\"/"/g foreach @addr;
533                         $aliases{$alias} = \@addr
534                 }}},
535         mailrc => sub { my $fh = shift; while (<$fh>) {
536                 if (/^alias\s+(\S+)\s+(.*?)\s*$/) {
537                         # spaces delimit multiple addresses
538                         $aliases{$1} = [ quotewords('\s+', 0, $2) ];
539                 }}},
540         pine => sub { my $fh = shift; my $f='\t[^\t]*';
541                 for (my $x = ''; defined($x); $x = $_) {
542                         chomp $x;
543                         $x .= $1 while(defined($_ = <$fh>) && /^ +(.*)$/);
544                         $x =~ /^(\S+)$f\t\(?([^\t]+?)\)?(:?$f){0,2}$/ or next;
545                         $aliases{$1} = [ split_addrs($2) ];
546                 }},
547         elm => sub  { my $fh = shift;
548                       while (<$fh>) {
549                           if (/^(\S+)\s+=\s+[^=]+=\s(\S+)/) {
550                               my ($alias, $addr) = ($1, $2);
551                                $aliases{$alias} = [ split_addrs($addr) ];
552                           }
553                       } },
554         sendmail => \&parse_sendmail_aliases,
555         gnus => sub { my $fh = shift; while (<$fh>) {
556                 if (/\(define-mail-alias\s+"(\S+?)"\s+"(\S+?)"\)/) {
557                         $aliases{$1} = [ $2 ];
558                 }}}
559 );
560
561 if (@alias_files and $aliasfiletype and defined $parse_alias{$aliasfiletype}) {
562         foreach my $file (@alias_files) {
563                 open my $fh, '<', $file or die "opening $file: $!\n";
564                 $parse_alias{$aliasfiletype}->($fh);
565                 close $fh;
566         }
567 }
568
569 if ($dump_aliases) {
570     print "$_\n" for (sort keys %aliases);
571     exit(0);
572 }
573
574 # is_format_patch_arg($f) returns 0 if $f names a patch, or 1 if
575 # $f is a revision list specification to be passed to format-patch.
576 sub is_format_patch_arg {
577         return unless $repo;
578         my $f = shift;
579         try {
580                 $repo->command('rev-parse', '--verify', '--quiet', $f);
581                 if (defined($format_patch)) {
582                         return $format_patch;
583                 }
584                 die(<<EOF);
585 File '$f' exists but it could also be the range of commits
586 to produce patches for.  Please disambiguate by...
587
588     * Saying "./$f" if you mean a file; or
589     * Giving --format-patch option if you mean a range.
590 EOF
591         } catch Git::Error::Command with {
592                 # Not a valid revision.  Treat it as a filename.
593                 return 0;
594         }
595 }
596
597 # Now that all the defaults are set, process the rest of the command line
598 # arguments and collect up the files that need to be processed.
599 my @rev_list_opts;
600 while (defined(my $f = shift @ARGV)) {
601         if ($f eq "--") {
602                 push @rev_list_opts, "--", @ARGV;
603                 @ARGV = ();
604         } elsif (-d $f and !is_format_patch_arg($f)) {
605                 opendir my $dh, $f
606                         or die "Failed to opendir $f: $!";
607
608                 push @files, grep { -f $_ } map { catfile($f, $_) }
609                                 sort readdir $dh;
610                 closedir $dh;
611         } elsif ((-f $f or -p $f) and !is_format_patch_arg($f)) {
612                 push @files, $f;
613         } else {
614                 push @rev_list_opts, $f;
615         }
616 }
617
618 if (@rev_list_opts) {
619         die "Cannot run git format-patch from outside a repository\n"
620                 unless $repo;
621         push @files, $repo->command('format-patch', '-o', tempdir(CLEANUP => 1), @rev_list_opts);
622 }
623
624 @files = handle_backup_files(@files);
625
626 if ($validate) {
627         foreach my $f (@files) {
628                 unless (-p $f) {
629                         my $error = validate_patch($f);
630                         $error and die "fatal: $f: $error\nwarning: no patches were sent\n";
631                 }
632         }
633 }
634
635 if (@files) {
636         unless ($quiet) {
637                 print $_,"\n" for (@files);
638         }
639 } else {
640         print STDERR "\nNo patch files specified!\n\n";
641         usage();
642 }
643
644 sub get_patch_subject {
645         my $fn = shift;
646         open (my $fh, '<', $fn);
647         while (my $line = <$fh>) {
648                 next unless ($line =~ /^Subject: (.*)$/);
649                 close $fh;
650                 return "GIT: $1\n";
651         }
652         close $fh;
653         die "No subject line in $fn ?";
654 }
655
656 if ($compose) {
657         # Note that this does not need to be secure, but we will make a small
658         # effort to have it be unique
659         $compose_filename = ($repo ?
660                 tempfile(".gitsendemail.msg.XXXXXX", DIR => $repo->repo_path()) :
661                 tempfile(".gitsendemail.msg.XXXXXX", DIR => "."))[1];
662         open my $c, ">", $compose_filename
663                 or die "Failed to open for writing $compose_filename: $!";
664
665
666         my $tpl_sender = $sender || $repoauthor || $repocommitter || '';
667         my $tpl_subject = $initial_subject || '';
668         my $tpl_reply_to = $initial_reply_to || '';
669
670         print $c <<EOT;
671 From $tpl_sender # This line is ignored.
672 GIT: Lines beginning in "GIT:" will be removed.
673 GIT: Consider including an overall diffstat or table of contents
674 GIT: for the patch you are writing.
675 GIT:
676 GIT: Clear the body content if you don't wish to send a summary.
677 From: $tpl_sender
678 Subject: $tpl_subject
679 In-Reply-To: $tpl_reply_to
680
681 EOT
682         for my $f (@files) {
683                 print $c get_patch_subject($f);
684         }
685         close $c;
686
687         if ($annotate) {
688                 do_edit($compose_filename, @files);
689         } else {
690                 do_edit($compose_filename);
691         }
692
693         open my $c2, ">", $compose_filename . ".final"
694                 or die "Failed to open $compose_filename.final : " . $!;
695
696         open $c, "<", $compose_filename
697                 or die "Failed to open $compose_filename : " . $!;
698
699         my $need_8bit_cte = file_has_nonascii($compose_filename);
700         my $in_body = 0;
701         my $summary_empty = 1;
702         if (!defined $compose_encoding) {
703                 $compose_encoding = "UTF-8";
704         }
705         while(<$c>) {
706                 next if m/^GIT:/;
707                 if ($in_body) {
708                         $summary_empty = 0 unless (/^\n$/);
709                 } elsif (/^\n$/) {
710                         $in_body = 1;
711                         if ($need_8bit_cte) {
712                                 print $c2 "MIME-Version: 1.0\n",
713                                          "Content-Type: text/plain; ",
714                                            "charset=$compose_encoding\n",
715                                          "Content-Transfer-Encoding: 8bit\n";
716                         }
717                 } elsif (/^MIME-Version:/i) {
718                         $need_8bit_cte = 0;
719                 } elsif (/^Subject:\s*(.+)\s*$/i) {
720                         $initial_subject = $1;
721                         my $subject = $initial_subject;
722                         $_ = "Subject: " .
723                                 quote_subject($subject, $compose_encoding) .
724                                 "\n";
725                 } elsif (/^In-Reply-To:\s*(.+)\s*$/i) {
726                         $initial_reply_to = $1;
727                         next;
728                 } elsif (/^From:\s*(.+)\s*$/i) {
729                         $sender = $1;
730                         next;
731                 } elsif (/^(?:To|Cc|Bcc):/i) {
732                         print "To/Cc/Bcc fields are not interpreted yet, they have been ignored\n";
733                         next;
734                 }
735                 print $c2 $_;
736         }
737         close $c;
738         close $c2;
739
740         if ($summary_empty) {
741                 print "Summary email is empty, skipping it\n";
742                 $compose = -1;
743         }
744 } elsif ($annotate) {
745         do_edit(@files);
746 }
747
748 sub ask {
749         my ($prompt, %arg) = @_;
750         my $valid_re = $arg{valid_re};
751         my $default = $arg{default};
752         my $confirm_only = $arg{confirm_only};
753         my $resp;
754         my $i = 0;
755         return defined $default ? $default : undef
756                 unless defined $term->IN and defined fileno($term->IN) and
757                        defined $term->OUT and defined fileno($term->OUT);
758         while ($i++ < 10) {
759                 $resp = $term->readline($prompt);
760                 if (!defined $resp) { # EOF
761                         print "\n";
762                         return defined $default ? $default : undef;
763                 }
764                 if ($resp eq '' and defined $default) {
765                         return $default;
766                 }
767                 if (!defined $valid_re or $resp =~ /$valid_re/) {
768                         return $resp;
769                 }
770                 if ($confirm_only) {
771                         my $yesno = $term->readline("Are you sure you want to use <$resp> [y/N]? ");
772                         if (defined $yesno && $yesno =~ /y/i) {
773                                 return $resp;
774                         }
775                 }
776         }
777         return;
778 }
779
780 my %broken_encoding;
781
782 sub file_declares_8bit_cte {
783         my $fn = shift;
784         open (my $fh, '<', $fn);
785         while (my $line = <$fh>) {
786                 last if ($line =~ /^$/);
787                 return 1 if ($line =~ /^Content-Transfer-Encoding: .*8bit.*$/);
788         }
789         close $fh;
790         return 0;
791 }
792
793 foreach my $f (@files) {
794         next unless (body_or_subject_has_nonascii($f)
795                      && !file_declares_8bit_cte($f));
796         $broken_encoding{$f} = 1;
797 }
798
799 if (!defined $auto_8bit_encoding && scalar %broken_encoding) {
800         print "The following files are 8bit, but do not declare " .
801                 "a Content-Transfer-Encoding.\n";
802         foreach my $f (sort keys %broken_encoding) {
803                 print "    $f\n";
804         }
805         $auto_8bit_encoding = ask("Which 8bit encoding should I declare [UTF-8]? ",
806                                   valid_re => qr/.{4}/, confirm_only => 1,
807                                   default => "UTF-8");
808 }
809
810 if (!$force) {
811         for my $f (@files) {
812                 if (get_patch_subject($f) =~ /\Q*** SUBJECT HERE ***\E/) {
813                         die "Refusing to send because the patch\n\t$f\n"
814                                 . "has the template subject '*** SUBJECT HERE ***'. "
815                                 . "Pass --force if you really want to send.\n";
816                 }
817         }
818 }
819
820 if (defined $sender) {
821         $sender =~ s/^\s+|\s+$//g;
822         ($sender) = expand_aliases($sender);
823 } else {
824         $sender = $repoauthor || $repocommitter || '';
825 }
826
827 # $sender could be an already sanitized address
828 # (e.g. sendemail.from could be manually sanitized by user).
829 # But it's a no-op to run sanitize_address on an already sanitized address.
830 $sender = sanitize_address($sender);
831
832 my $to_whom = "To whom should the emails be sent (if anyone)?";
833 my $prompting = 0;
834 if (!@initial_to && !defined $to_cmd) {
835         my $to = ask("$to_whom ",
836                      default => "",
837                      valid_re => qr/\@.*\./, confirm_only => 1);
838         push @initial_to, parse_address_line($to) if defined $to; # sanitized/validated later
839         $prompting++;
840 }
841
842 sub expand_aliases {
843         return map { expand_one_alias($_) } @_;
844 }
845
846 my %EXPANDED_ALIASES;
847 sub expand_one_alias {
848         my $alias = shift;
849         if ($EXPANDED_ALIASES{$alias}) {
850                 die "fatal: alias '$alias' expands to itself\n";
851         }
852         local $EXPANDED_ALIASES{$alias} = 1;
853         return $aliases{$alias} ? expand_aliases(@{$aliases{$alias}}) : $alias;
854 }
855
856 @initial_to = process_address_list(@initial_to);
857 @initial_cc = process_address_list(@initial_cc);
858 @bcclist = process_address_list(@bcclist);
859
860 if ($thread && !defined $initial_reply_to && $prompting) {
861         $initial_reply_to = ask(
862                 "Message-ID to be used as In-Reply-To for the first email (if any)? ",
863                 default => "",
864                 valid_re => qr/\@.*\./, confirm_only => 1);
865 }
866 if (defined $initial_reply_to) {
867         $initial_reply_to =~ s/^\s*<?//;
868         $initial_reply_to =~ s/>?\s*$//;
869         $initial_reply_to = "<$initial_reply_to>" if $initial_reply_to ne '';
870 }
871
872 if (!defined $smtp_server) {
873         foreach (qw( /usr/sbin/sendmail /usr/lib/sendmail )) {
874                 if (-x $_) {
875                         $smtp_server = $_;
876                         last;
877                 }
878         }
879         $smtp_server ||= 'localhost'; # could be 127.0.0.1, too... *shrug*
880 }
881
882 if ($compose && $compose > 0) {
883         @files = ($compose_filename . ".final", @files);
884 }
885
886 # Variables we set as part of the loop over files
887 our ($message_id, %mail, $subject, $reply_to, $references, $message,
888         $needs_confirm, $message_num, $ask_default);
889
890 sub extract_valid_address {
891         my $address = shift;
892         my $local_part_regexp = qr/[^<>"\s@]+/;
893         my $domain_regexp = qr/[^.<>"\s@]+(?:\.[^.<>"\s@]+)+/;
894
895         # check for a local address:
896         return $address if ($address =~ /^($local_part_regexp)$/);
897
898         $address =~ s/^\s*<(.*)>\s*$/$1/;
899         if ($have_email_valid) {
900                 return scalar Email::Valid->address($address);
901         }
902
903         # less robust/correct than the monster regexp in Email::Valid,
904         # but still does a 99% job, and one less dependency
905         return $1 if $address =~ /($local_part_regexp\@$domain_regexp)/;
906         return;
907 }
908
909 sub extract_valid_address_or_die {
910         my $address = shift;
911         $address = extract_valid_address($address);
912         die "error: unable to extract a valid address from: $address\n"
913                 if !$address;
914         return $address;
915 }
916
917 sub validate_address {
918         my $address = shift;
919         while (!extract_valid_address($address)) {
920                 print STDERR "error: unable to extract a valid address from: $address\n";
921                 $_ = ask("What to do with this address? ([q]uit|[d]rop|[e]dit): ",
922                         valid_re => qr/^(?:quit|q|drop|d|edit|e)/i,
923                         default => 'q');
924                 if (/^d/i) {
925                         return undef;
926                 } elsif (/^q/i) {
927                         cleanup_compose_files();
928                         exit(0);
929                 }
930                 $address = ask("$to_whom ",
931                         default => "",
932                         valid_re => qr/\@.*\./, confirm_only => 1);
933         }
934         return $address;
935 }
936
937 sub validate_address_list {
938         return (grep { defined $_ }
939                 map { validate_address($_) } @_);
940 }
941
942 # Usually don't need to change anything below here.
943
944 # we make a "fake" message id by taking the current number
945 # of seconds since the beginning of Unix time and tacking on
946 # a random number to the end, in case we are called quicker than
947 # 1 second since the last time we were called.
948
949 # We'll setup a template for the message id, using the "from" address:
950
951 my ($message_id_stamp, $message_id_serial);
952 sub make_message_id {
953         my $uniq;
954         if (!defined $message_id_stamp) {
955                 $message_id_stamp = strftime("%Y%m%d%H%M%S.$$", gmtime(time));
956                 $message_id_serial = 0;
957         }
958         $message_id_serial++;
959         $uniq = "$message_id_stamp-$message_id_serial";
960
961         my $du_part;
962         for ($sender, $repocommitter, $repoauthor) {
963                 $du_part = extract_valid_address(sanitize_address($_));
964                 last if (defined $du_part and $du_part ne '');
965         }
966         if (not defined $du_part or $du_part eq '') {
967                 require Sys::Hostname;
968                 $du_part = 'user@' . Sys::Hostname::hostname();
969         }
970         my $message_id_template = "<%s-%s>";
971         $message_id = sprintf($message_id_template, $uniq, $du_part);
972         #print "new message id = $message_id\n"; # Was useful for debugging
973 }
974
975
976
977 $time = time - scalar $#files;
978
979 sub unquote_rfc2047 {
980         local ($_) = @_;
981         my $charset;
982         my $sep = qr/[ \t]+/;
983         s{$re_encoded_word(?:$sep$re_encoded_word)*}{
984                 my @words = split $sep, $&;
985                 foreach (@words) {
986                         m/$re_encoded_word/;
987                         $charset = $1;
988                         my $encoding = $2;
989                         my $text = $3;
990                         if ($encoding eq 'q' || $encoding eq 'Q') {
991                                 $_ = $text;
992                                 s/_/ /g;
993                                 s/=([0-9A-F]{2})/chr(hex($1))/egi;
994                         } else {
995                                 # other encodings not supported yet
996                         }
997                 }
998                 join '', @words;
999         }eg;
1000         return wantarray ? ($_, $charset) : $_;
1001 }
1002
1003 sub quote_rfc2047 {
1004         local $_ = shift;
1005         my $encoding = shift || 'UTF-8';
1006         s/([^-a-zA-Z0-9!*+\/])/sprintf("=%02X", ord($1))/eg;
1007         s/(.*)/=\?$encoding\?q\?$1\?=/;
1008         return $_;
1009 }
1010
1011 sub is_rfc2047_quoted {
1012         my $s = shift;
1013         length($s) <= 75 &&
1014         $s =~ m/^(?:"[[:ascii:]]*"|$re_encoded_word)$/o;
1015 }
1016
1017 sub subject_needs_rfc2047_quoting {
1018         my $s = shift;
1019
1020         return ($s =~ /[^[:ascii:]]/) || ($s =~ /=\?/);
1021 }
1022
1023 sub quote_subject {
1024         local $subject = shift;
1025         my $encoding = shift || 'UTF-8';
1026
1027         if (subject_needs_rfc2047_quoting($subject)) {
1028                 return quote_rfc2047($subject, $encoding);
1029         }
1030         return $subject;
1031 }
1032
1033 # use the simplest quoting being able to handle the recipient
1034 sub sanitize_address {
1035         my ($recipient) = @_;
1036
1037         # remove garbage after email address
1038         $recipient =~ s/(.*>).*$/$1/;
1039
1040         my ($recipient_name, $recipient_addr) = ($recipient =~ /^(.*?)\s*(<.*)/);
1041
1042         if (not $recipient_name) {
1043                 return $recipient;
1044         }
1045
1046         # if recipient_name is already quoted, do nothing
1047         if (is_rfc2047_quoted($recipient_name)) {
1048                 return $recipient;
1049         }
1050
1051         # remove non-escaped quotes
1052         $recipient_name =~ s/(^|[^\\])"/$1/g;
1053
1054         # rfc2047 is needed if a non-ascii char is included
1055         if ($recipient_name =~ /[^[:ascii:]]/) {
1056                 $recipient_name = quote_rfc2047($recipient_name);
1057         }
1058
1059         # double quotes are needed if specials or CTLs are included
1060         elsif ($recipient_name =~ /[][()<>@,;:\\".\000-\037\177]/) {
1061                 $recipient_name =~ s/([\\\r])/\\$1/g;
1062                 $recipient_name = qq["$recipient_name"];
1063         }
1064
1065         return "$recipient_name $recipient_addr";
1066
1067 }
1068
1069 sub sanitize_address_list {
1070         return (map { sanitize_address($_) } @_);
1071 }
1072
1073 sub process_address_list {
1074         my @addr_list = map { parse_address_line($_) } @_;
1075         @addr_list = expand_aliases(@addr_list);
1076         @addr_list = sanitize_address_list(@addr_list);
1077         @addr_list = validate_address_list(@addr_list);
1078         return @addr_list;
1079 }
1080
1081 # Returns the local Fully Qualified Domain Name (FQDN) if available.
1082 #
1083 # Tightly configured MTAa require that a caller sends a real DNS
1084 # domain name that corresponds the IP address in the HELO/EHLO
1085 # handshake. This is used to verify the connection and prevent
1086 # spammers from trying to hide their identity. If the DNS and IP don't
1087 # match, the receiveing MTA may deny the connection.
1088 #
1089 # Here is a deny example of Net::SMTP with the default "localhost.localdomain"
1090 #
1091 # Net::SMTP=GLOB(0x267ec28)>>> EHLO localhost.localdomain
1092 # Net::SMTP=GLOB(0x267ec28)<<< 550 EHLO argument does not match calling host
1093 #
1094 # This maildomain*() code is based on ideas in Perl library Test::Reporter
1095 # /usr/share/perl5/Test/Reporter/Mail/Util.pm ==> sub _maildomain ()
1096
1097 sub valid_fqdn {
1098         my $domain = shift;
1099         return defined $domain && !($^O eq 'darwin' && $domain =~ /\.local$/) && $domain =~ /\./;
1100 }
1101
1102 sub maildomain_net {
1103         my $maildomain;
1104
1105         if (eval { require Net::Domain; 1 }) {
1106                 my $domain = Net::Domain::domainname();
1107                 $maildomain = $domain if valid_fqdn($domain);
1108         }
1109
1110         return $maildomain;
1111 }
1112
1113 sub maildomain_mta {
1114         my $maildomain;
1115
1116         if (eval { require Net::SMTP; 1 }) {
1117                 for my $host (qw(mailhost localhost)) {
1118                         my $smtp = Net::SMTP->new($host);
1119                         if (defined $smtp) {
1120                                 my $domain = $smtp->domain;
1121                                 $smtp->quit;
1122
1123                                 $maildomain = $domain if valid_fqdn($domain);
1124
1125                                 last if $maildomain;
1126                         }
1127                 }
1128         }
1129
1130         return $maildomain;
1131 }
1132
1133 sub maildomain {
1134         return maildomain_net() || maildomain_mta() || 'localhost.localdomain';
1135 }
1136
1137 sub smtp_host_string {
1138         if (defined $smtp_server_port) {
1139                 return "$smtp_server:$smtp_server_port";
1140         } else {
1141                 return $smtp_server;
1142         }
1143 }
1144
1145 # Returns 1 if authentication succeeded or was not necessary
1146 # (smtp_user was not specified), and 0 otherwise.
1147
1148 sub smtp_auth_maybe {
1149         if (!defined $smtp_authuser || $auth) {
1150                 return 1;
1151         }
1152
1153         # Workaround AUTH PLAIN/LOGIN interaction defect
1154         # with Authen::SASL::Cyrus
1155         eval {
1156                 require Authen::SASL;
1157                 Authen::SASL->import(qw(Perl));
1158         };
1159
1160         # Check mechanism naming as defined in:
1161         # https://tools.ietf.org/html/rfc4422#page-8
1162         if ($smtp_auth && $smtp_auth !~ /^(\b[A-Z0-9-_]{1,20}\s*)*$/) {
1163                 die "invalid smtp auth: '${smtp_auth}'";
1164         }
1165
1166         # TODO: Authentication may fail not because credentials were
1167         # invalid but due to other reasons, in which we should not
1168         # reject credentials.
1169         $auth = Git::credential({
1170                 'protocol' => 'smtp',
1171                 'host' => smtp_host_string(),
1172                 'username' => $smtp_authuser,
1173                 # if there's no password, "git credential fill" will
1174                 # give us one, otherwise it'll just pass this one.
1175                 'password' => $smtp_authpass
1176         }, sub {
1177                 my $cred = shift;
1178
1179                 if ($smtp_auth) {
1180                         my $sasl = Authen::SASL->new(
1181                                 mechanism => $smtp_auth,
1182                                 callback => {
1183                                         user => $cred->{'username'},
1184                                         pass => $cred->{'password'},
1185                                         authname => $cred->{'username'},
1186                                 }
1187                         );
1188
1189                         return !!$smtp->auth($sasl);
1190                 }
1191
1192                 return !!$smtp->auth($cred->{'username'}, $cred->{'password'});
1193         });
1194
1195         return $auth;
1196 }
1197
1198 sub ssl_verify_params {
1199         eval {
1200                 require IO::Socket::SSL;
1201                 IO::Socket::SSL->import(qw/SSL_VERIFY_PEER SSL_VERIFY_NONE/);
1202         };
1203         if ($@) {
1204                 print STDERR "Not using SSL_VERIFY_PEER due to out-of-date IO::Socket::SSL.\n";
1205                 return;
1206         }
1207
1208         if (!defined $smtp_ssl_cert_path) {
1209                 # use the OpenSSL defaults
1210                 return (SSL_verify_mode => SSL_VERIFY_PEER());
1211         }
1212
1213         if ($smtp_ssl_cert_path eq "") {
1214                 return (SSL_verify_mode => SSL_VERIFY_NONE());
1215         } elsif (-d $smtp_ssl_cert_path) {
1216                 return (SSL_verify_mode => SSL_VERIFY_PEER(),
1217                         SSL_ca_path => $smtp_ssl_cert_path);
1218         } elsif (-f $smtp_ssl_cert_path) {
1219                 return (SSL_verify_mode => SSL_VERIFY_PEER(),
1220                         SSL_ca_file => $smtp_ssl_cert_path);
1221         } else {
1222                 die "CA path \"$smtp_ssl_cert_path\" does not exist";
1223         }
1224 }
1225
1226 sub file_name_is_absolute {
1227         my ($path) = @_;
1228
1229         # msys does not grok DOS drive-prefixes
1230         if ($^O eq 'msys') {
1231                 return ($path =~ m#^/# || $path =~ m#^[a-zA-Z]\:#)
1232         }
1233
1234         require File::Spec::Functions;
1235         return File::Spec::Functions::file_name_is_absolute($path);
1236 }
1237
1238 # Returns 1 if the message was sent, and 0 otherwise.
1239 # In actuality, the whole program dies when there
1240 # is an error sending a message.
1241
1242 sub send_message {
1243         my @recipients = unique_email_list(@to);
1244         @cc = (grep { my $cc = extract_valid_address_or_die($_);
1245                       not grep { $cc eq $_ || $_ =~ /<\Q${cc}\E>$/ } @recipients
1246                     }
1247                @cc);
1248         my $to = join (",\n\t", @recipients);
1249         @recipients = unique_email_list(@recipients,@cc,@bcclist);
1250         @recipients = (map { extract_valid_address_or_die($_) } @recipients);
1251         my $date = format_2822_time($time++);
1252         my $gitversion = '@@GIT_VERSION@@';
1253         if ($gitversion =~ m/..GIT_VERSION../) {
1254             $gitversion = Git::version();
1255         }
1256
1257         my $cc = join(",\n\t", unique_email_list(@cc));
1258         my $ccline = "";
1259         if ($cc ne '') {
1260                 $ccline = "\nCc: $cc";
1261         }
1262         make_message_id() unless defined($message_id);
1263
1264         my $header = "From: $sender
1265 To: $to${ccline}
1266 Subject: $subject
1267 Date: $date
1268 Message-Id: $message_id
1269 ";
1270         if ($use_xmailer) {
1271                 $header .= "X-Mailer: git-send-email $gitversion\n";
1272         }
1273         if ($reply_to) {
1274
1275                 $header .= "In-Reply-To: $reply_to\n";
1276                 $header .= "References: $references\n";
1277         }
1278         if (@xh) {
1279                 $header .= join("\n", @xh) . "\n";
1280         }
1281
1282         my @sendmail_parameters = ('-i', @recipients);
1283         my $raw_from = $sender;
1284         if (defined $envelope_sender && $envelope_sender ne "auto") {
1285                 $raw_from = $envelope_sender;
1286         }
1287         $raw_from = extract_valid_address($raw_from);
1288         unshift (@sendmail_parameters,
1289                         '-f', $raw_from) if(defined $envelope_sender);
1290
1291         if ($needs_confirm && !$dry_run) {
1292                 print "\n$header\n";
1293                 if ($needs_confirm eq "inform") {
1294                         $confirm_unconfigured = 0; # squelch this message for the rest of this run
1295                         $ask_default = "y"; # assume yes on EOF since user hasn't explicitly asked for confirmation
1296                         print "    The Cc list above has been expanded by additional\n";
1297                         print "    addresses found in the patch commit message. By default\n";
1298                         print "    send-email prompts before sending whenever this occurs.\n";
1299                         print "    This behavior is controlled by the sendemail.confirm\n";
1300                         print "    configuration setting.\n";
1301                         print "\n";
1302                         print "    For additional information, run 'git send-email --help'.\n";
1303                         print "    To retain the current behavior, but squelch this message,\n";
1304                         print "    run 'git config --global sendemail.confirm auto'.\n\n";
1305                 }
1306                 $_ = ask("Send this email? ([y]es|[n]o|[q]uit|[a]ll): ",
1307                          valid_re => qr/^(?:yes|y|no|n|quit|q|all|a)/i,
1308                          default => $ask_default);
1309                 die "Send this email reply required" unless defined $_;
1310                 if (/^n/i) {
1311                         return 0;
1312                 } elsif (/^q/i) {
1313                         cleanup_compose_files();
1314                         exit(0);
1315                 } elsif (/^a/i) {
1316                         $confirm = 'never';
1317                 }
1318         }
1319
1320         unshift (@sendmail_parameters, @smtp_server_options);
1321
1322         if ($dry_run) {
1323                 # We don't want to send the email.
1324         } elsif (file_name_is_absolute($smtp_server)) {
1325                 my $pid = open my $sm, '|-';
1326                 defined $pid or die $!;
1327                 if (!$pid) {
1328                         exec($smtp_server, @sendmail_parameters) or die $!;
1329                 }
1330                 print $sm "$header\n$message";
1331                 close $sm or die $!;
1332         } else {
1333
1334                 if (!defined $smtp_server) {
1335                         die "The required SMTP server is not properly defined."
1336                 }
1337
1338                 if ($smtp_encryption eq 'ssl') {
1339                         $smtp_server_port ||= 465; # ssmtp
1340                         require Net::SMTP::SSL;
1341                         $smtp_domain ||= maildomain();
1342                         require IO::Socket::SSL;
1343
1344                         # Suppress "variable accessed once" warning.
1345                         {
1346                                 no warnings 'once';
1347                                 $IO::Socket::SSL::DEBUG = 1;
1348                         }
1349
1350                         # Net::SMTP::SSL->new() does not forward any SSL options
1351                         IO::Socket::SSL::set_client_defaults(
1352                                 ssl_verify_params());
1353                         $smtp ||= Net::SMTP::SSL->new($smtp_server,
1354                                                       Hello => $smtp_domain,
1355                                                       Port => $smtp_server_port,
1356                                                       Debug => $debug_net_smtp);
1357                 }
1358                 else {
1359                         require Net::SMTP;
1360                         $smtp_domain ||= maildomain();
1361                         $smtp_server_port ||= 25;
1362                         $smtp ||= Net::SMTP->new($smtp_server,
1363                                                  Hello => $smtp_domain,
1364                                                  Debug => $debug_net_smtp,
1365                                                  Port => $smtp_server_port);
1366                         if ($smtp_encryption eq 'tls' && $smtp) {
1367                                 require Net::SMTP::SSL;
1368                                 $smtp->command('STARTTLS');
1369                                 $smtp->response();
1370                                 if ($smtp->code == 220) {
1371                                         $smtp = Net::SMTP::SSL->start_SSL($smtp,
1372                                                                           ssl_verify_params())
1373                                                 or die "STARTTLS failed! ".IO::Socket::SSL::errstr();
1374                                         $smtp_encryption = '';
1375                                         # Send EHLO again to receive fresh
1376                                         # supported commands
1377                                         $smtp->hello($smtp_domain);
1378                                 } else {
1379                                         die "Server does not support STARTTLS! ".$smtp->message;
1380                                 }
1381                         }
1382                 }
1383
1384                 if (!$smtp) {
1385                         die "Unable to initialize SMTP properly. Check config and use --smtp-debug. ",
1386                             "VALUES: server=$smtp_server ",
1387                             "encryption=$smtp_encryption ",
1388                             "hello=$smtp_domain",
1389                             defined $smtp_server_port ? " port=$smtp_server_port" : "";
1390                 }
1391
1392                 smtp_auth_maybe or die $smtp->message;
1393
1394                 $smtp->mail( $raw_from ) or die $smtp->message;
1395                 $smtp->to( @recipients ) or die $smtp->message;
1396                 $smtp->data or die $smtp->message;
1397                 $smtp->datasend("$header\n") or die $smtp->message;
1398                 my @lines = split /^/, $message;
1399                 foreach my $line (@lines) {
1400                         $smtp->datasend("$line") or die $smtp->message;
1401                 }
1402                 $smtp->dataend() or die $smtp->message;
1403                 $smtp->code =~ /250|200/ or die "Failed to send $subject\n".$smtp->message;
1404         }
1405         if ($quiet) {
1406                 printf (($dry_run ? "Dry-" : "")."Sent %s\n", $subject);
1407         } else {
1408                 print (($dry_run ? "Dry-" : "")."OK. Log says:\n");
1409                 if (!file_name_is_absolute($smtp_server)) {
1410                         print "Server: $smtp_server\n";
1411                         print "MAIL FROM:<$raw_from>\n";
1412                         foreach my $entry (@recipients) {
1413                             print "RCPT TO:<$entry>\n";
1414                         }
1415                 } else {
1416                         print "Sendmail: $smtp_server ".join(' ',@sendmail_parameters)."\n";
1417                 }
1418                 print $header, "\n";
1419                 if ($smtp) {
1420                         print "Result: ", $smtp->code, ' ',
1421                                 ($smtp->message =~ /\n([^\n]+\n)$/s), "\n";
1422                 } else {
1423                         print "Result: OK\n";
1424                 }
1425         }
1426
1427         return 1;
1428 }
1429
1430 $reply_to = $initial_reply_to;
1431 $references = $initial_reply_to || '';
1432 $subject = $initial_subject;
1433 $message_num = 0;
1434
1435 foreach my $t (@files) {
1436         open my $fh, "<", $t or die "can't open file $t";
1437
1438         my $author = undef;
1439         my $sauthor = undef;
1440         my $author_encoding;
1441         my $has_content_type;
1442         my $body_encoding;
1443         my $xfer_encoding;
1444         my $has_mime_version;
1445         @to = ();
1446         @cc = ();
1447         @xh = ();
1448         my $input_format = undef;
1449         my @header = ();
1450         $message = "";
1451         $message_num++;
1452         # First unfold multiline header fields
1453         while(<$fh>) {
1454                 last if /^\s*$/;
1455                 if (/^\s+\S/ and @header) {
1456                         chomp($header[$#header]);
1457                         s/^\s+/ /;
1458                         $header[$#header] .= $_;
1459             } else {
1460                         push(@header, $_);
1461                 }
1462         }
1463         # Now parse the header
1464         foreach(@header) {
1465                 if (/^From /) {
1466                         $input_format = 'mbox';
1467                         next;
1468                 }
1469                 chomp;
1470                 if (!defined $input_format && /^[-A-Za-z]+:\s/) {
1471                         $input_format = 'mbox';
1472                 }
1473
1474                 if (defined $input_format && $input_format eq 'mbox') {
1475                         if (/^Subject:\s+(.*)$/i) {
1476                                 $subject = $1;
1477                         }
1478                         elsif (/^From:\s+(.*)$/i) {
1479                                 ($author, $author_encoding) = unquote_rfc2047($1);
1480                                 $sauthor = sanitize_address($author);
1481                                 next if $suppress_cc{'author'};
1482                                 next if $suppress_cc{'self'} and $sauthor eq $sender;
1483                                 printf("(mbox) Adding cc: %s from line '%s'\n",
1484                                         $1, $_) unless $quiet;
1485                                 push @cc, $1;
1486                         }
1487                         elsif (/^To:\s+(.*)$/i) {
1488                                 foreach my $addr (parse_address_line($1)) {
1489                                         printf("(mbox) Adding to: %s from line '%s'\n",
1490                                                 $addr, $_) unless $quiet;
1491                                         push @to, $addr;
1492                                 }
1493                         }
1494                         elsif (/^Cc:\s+(.*)$/i) {
1495                                 foreach my $addr (parse_address_line($1)) {
1496                                         my $qaddr = unquote_rfc2047($addr);
1497                                         my $saddr = sanitize_address($qaddr);
1498                                         if ($saddr eq $sender) {
1499                                                 next if ($suppress_cc{'self'});
1500                                         } else {
1501                                                 next if ($suppress_cc{'cc'});
1502                                         }
1503                                         printf("(mbox) Adding cc: %s from line '%s'\n",
1504                                                 $addr, $_) unless $quiet;
1505                                         push @cc, $addr;
1506                                 }
1507                         }
1508                         elsif (/^Content-type:/i) {
1509                                 $has_content_type = 1;
1510                                 if (/charset="?([^ "]+)/) {
1511                                         $body_encoding = $1;
1512                                 }
1513                                 push @xh, $_;
1514                         }
1515                         elsif (/^MIME-Version/i) {
1516                                 $has_mime_version = 1;
1517                                 push @xh, $_;
1518                         }
1519                         elsif (/^Message-Id: (.*)/i) {
1520                                 $message_id = $1;
1521                         }
1522                         elsif (/^Content-Transfer-Encoding: (.*)/i) {
1523                                 $xfer_encoding = $1 if not defined $xfer_encoding;
1524                         }
1525                         elsif (!/^Date:\s/i && /^[-A-Za-z]+:\s+\S/) {
1526                                 push @xh, $_;
1527                         }
1528
1529                 } else {
1530                         # In the traditional
1531                         # "send lots of email" format,
1532                         # line 1 = cc
1533                         # line 2 = subject
1534                         # So let's support that, too.
1535                         $input_format = 'lots';
1536                         if (@cc == 0 && !$suppress_cc{'cc'}) {
1537                                 printf("(non-mbox) Adding cc: %s from line '%s'\n",
1538                                         $_, $_) unless $quiet;
1539                                 push @cc, $_;
1540                         } elsif (!defined $subject) {
1541                                 $subject = $_;
1542                         }
1543                 }
1544         }
1545         # Now parse the message body
1546         while(<$fh>) {
1547                 $message .=  $_;
1548                 if (/^(Signed-off-by|Cc): (.*)$/i) {
1549                         chomp;
1550                         my ($what, $c) = ($1, $2);
1551                         chomp $c;
1552                         my $sc = sanitize_address($c);
1553                         if ($sc eq $sender) {
1554                                 next if ($suppress_cc{'self'});
1555                         } else {
1556                                 next if $suppress_cc{'sob'} and $what =~ /Signed-off-by/i;
1557                                 next if $suppress_cc{'bodycc'} and $what =~ /Cc/i;
1558                         }
1559                         push @cc, $c;
1560                         printf("(body) Adding cc: %s from line '%s'\n",
1561                                 $c, $_) unless $quiet;
1562                 }
1563         }
1564         close $fh;
1565
1566         push @to, recipients_cmd("to-cmd", "to", $to_cmd, $t)
1567                 if defined $to_cmd;
1568         push @cc, recipients_cmd("cc-cmd", "cc", $cc_cmd, $t)
1569                 if defined $cc_cmd && !$suppress_cc{'cccmd'};
1570
1571         if ($broken_encoding{$t} && !$has_content_type) {
1572                 $xfer_encoding = '8bit' if not defined $xfer_encoding;
1573                 $has_content_type = 1;
1574                 push @xh, "Content-Type: text/plain; charset=$auto_8bit_encoding";
1575                 $body_encoding = $auto_8bit_encoding;
1576         }
1577
1578         if ($broken_encoding{$t} && !is_rfc2047_quoted($subject)) {
1579                 $subject = quote_subject($subject, $auto_8bit_encoding);
1580         }
1581
1582         if (defined $sauthor and $sauthor ne $sender) {
1583                 $message = "From: $author\n\n$message";
1584                 if (defined $author_encoding) {
1585                         if ($has_content_type) {
1586                                 if ($body_encoding eq $author_encoding) {
1587                                         # ok, we already have the right encoding
1588                                 }
1589                                 else {
1590                                         # uh oh, we should re-encode
1591                                 }
1592                         }
1593                         else {
1594                                 $xfer_encoding = '8bit' if not defined $xfer_encoding;
1595                                 $has_content_type = 1;
1596                                 push @xh,
1597                                   "Content-Type: text/plain; charset=$author_encoding";
1598                         }
1599                 }
1600         }
1601         if (defined $target_xfer_encoding) {
1602                 $xfer_encoding = '8bit' if not defined $xfer_encoding;
1603                 $message = apply_transfer_encoding(
1604                         $message, $xfer_encoding, $target_xfer_encoding);
1605                 $xfer_encoding = $target_xfer_encoding;
1606         }
1607         if (defined $xfer_encoding) {
1608                 push @xh, "Content-Transfer-Encoding: $xfer_encoding";
1609         }
1610         if (defined $xfer_encoding or $has_content_type) {
1611                 unshift @xh, 'MIME-Version: 1.0' unless $has_mime_version;
1612         }
1613
1614         $needs_confirm = (
1615                 $confirm eq "always" or
1616                 ($confirm =~ /^(?:auto|cc)$/ && @cc) or
1617                 ($confirm =~ /^(?:auto|compose)$/ && $compose && $message_num == 1));
1618         $needs_confirm = "inform" if ($needs_confirm && $confirm_unconfigured && @cc);
1619
1620         @to = process_address_list(@to);
1621         @cc = process_address_list(@cc);
1622
1623         @to = (@initial_to, @to);
1624         @cc = (@initial_cc, @cc);
1625
1626         if ($message_num == 1) {
1627                 if (defined $cover_cc and $cover_cc) {
1628                         @initial_cc = @cc;
1629                 }
1630                 if (defined $cover_to and $cover_to) {
1631                         @initial_to = @to;
1632                 }
1633         }
1634
1635         my $message_was_sent = send_message();
1636
1637         # set up for the next message
1638         if ($thread && $message_was_sent &&
1639                 ($chain_reply_to || !defined $reply_to || length($reply_to) == 0 ||
1640                 $message_num == 1)) {
1641                 $reply_to = $message_id;
1642                 if (length $references > 0) {
1643                         $references .= "\n $message_id";
1644                 } else {
1645                         $references = "$message_id";
1646                 }
1647         }
1648         $message_id = undef;
1649 }
1650
1651 # Execute a command (e.g. $to_cmd) to get a list of email addresses
1652 # and return a results array
1653 sub recipients_cmd {
1654         my ($prefix, $what, $cmd, $file) = @_;
1655
1656         my @addresses = ();
1657         open my $fh, "-|", "$cmd \Q$file\E"
1658             or die "($prefix) Could not execute '$cmd'";
1659         while (my $address = <$fh>) {
1660                 $address =~ s/^\s*//g;
1661                 $address =~ s/\s*$//g;
1662                 $address = sanitize_address($address);
1663                 next if ($address eq $sender and $suppress_cc{'self'});
1664                 push @addresses, $address;
1665                 printf("($prefix) Adding %s: %s from: '%s'\n",
1666                        $what, $address, $cmd) unless $quiet;
1667                 }
1668         close $fh
1669             or die "($prefix) failed to close pipe to '$cmd'";
1670         return @addresses;
1671 }
1672
1673 cleanup_compose_files();
1674
1675 sub cleanup_compose_files {
1676         unlink($compose_filename, $compose_filename . ".final") if $compose;
1677 }
1678
1679 $smtp->quit if $smtp;
1680
1681 sub apply_transfer_encoding {
1682         my $message = shift;
1683         my $from = shift;
1684         my $to = shift;
1685
1686         return $message if ($from eq $to and $from ne '7bit');
1687
1688         require MIME::QuotedPrint;
1689         require MIME::Base64;
1690
1691         $message = MIME::QuotedPrint::decode($message)
1692                 if ($from eq 'quoted-printable');
1693         $message = MIME::Base64::decode($message)
1694                 if ($from eq 'base64');
1695
1696         die "cannot send message as 7bit"
1697                 if ($to eq '7bit' and $message =~ /[^[:ascii:]]/);
1698         return $message
1699                 if ($to eq '7bit' or $to eq '8bit');
1700         return MIME::QuotedPrint::encode($message, "\n", 0)
1701                 if ($to eq 'quoted-printable');
1702         return MIME::Base64::encode($message, "\n")
1703                 if ($to eq 'base64');
1704         die "invalid transfer encoding";
1705 }
1706
1707 sub unique_email_list {
1708         my %seen;
1709         my @emails;
1710
1711         foreach my $entry (@_) {
1712                 my $clean = extract_valid_address_or_die($entry);
1713                 $seen{$clean} ||= 0;
1714                 next if $seen{$clean}++;
1715                 push @emails, $entry;
1716         }
1717         return @emails;
1718 }
1719
1720 sub validate_patch {
1721         my $fn = shift;
1722         open(my $fh, '<', $fn)
1723                 or die "unable to open $fn: $!\n";
1724         while (my $line = <$fh>) {
1725                 if (length($line) > 998) {
1726                         return "$.: patch contains a line longer than 998 characters";
1727                 }
1728         }
1729         return;
1730 }
1731
1732 sub handle_backup {
1733         my ($last, $lastlen, $file, $known_suffix) = @_;
1734         my ($suffix, $skip);
1735
1736         $skip = 0;
1737         if (defined $last &&
1738             ($lastlen < length($file)) &&
1739             (substr($file, 0, $lastlen) eq $last) &&
1740             ($suffix = substr($file, $lastlen)) !~ /^[a-z0-9]/i) {
1741                 if (defined $known_suffix && $suffix eq $known_suffix) {
1742                         print "Skipping $file with backup suffix '$known_suffix'.\n";
1743                         $skip = 1;
1744                 } else {
1745                         my $answer = ask("Do you really want to send $file? (y|N): ",
1746                                          valid_re => qr/^(?:y|n)/i,
1747                                          default => 'n');
1748                         $skip = ($answer ne 'y');
1749                         if ($skip) {
1750                                 $known_suffix = $suffix;
1751                         }
1752                 }
1753         }
1754         return ($skip, $known_suffix);
1755 }
1756
1757 sub handle_backup_files {
1758         my @file = @_;
1759         my ($last, $lastlen, $known_suffix, $skip, @result);
1760         for my $file (@file) {
1761                 ($skip, $known_suffix) = handle_backup($last, $lastlen,
1762                                                        $file, $known_suffix);
1763                 push @result, $file unless $skip;
1764                 $last = $file;
1765                 $lastlen = length($file);
1766         }
1767         return @result;
1768 }
1769
1770 sub file_has_nonascii {
1771         my $fn = shift;
1772         open(my $fh, '<', $fn)
1773                 or die "unable to open $fn: $!\n";
1774         while (my $line = <$fh>) {
1775                 return 1 if $line =~ /[^[:ascii:]]/;
1776         }
1777         return 0;
1778 }
1779
1780 sub body_or_subject_has_nonascii {
1781         my $fn = shift;
1782         open(my $fh, '<', $fn)
1783                 or die "unable to open $fn: $!\n";
1784         while (my $line = <$fh>) {
1785                 last if $line =~ /^$/;
1786                 return 1 if $line =~ /^Subject.*[^[:ascii:]]/;
1787         }
1788         while (my $line = <$fh>) {
1789                 return 1 if $line =~ /[^[:ascii:]]/;
1790         }
1791         return 0;
1792 }