git-send-email.perl

   1 #!/usr/bin/perl -w
   2 #
   3 # Copyright 2002,2005 Greg Kroah-Hartman <greg@kroah.com>
   4 # Copyright 2005 Ryan Anderson <ryan@michonline.com>
   5 #
   6 # GPL v2 (See COPYING)
   7 #
   8 # Ported to support git "mbox" format files by Ryan Anderson <ryan@michonline.com>
   9 #
  10 # Sends a collection of emails to the given email addresses, disturbingly fast.
  11 #
  12 # Supports two formats:
  13 # 1. mbox format files (ignoring most headers and MIME formatting - this is designed for sending patches)
  14 # 2. The original format support by Greg's script:
  15 #    first line of the message is who to CC,
  16 #    and second line is the subject of the message.
  17 #
  18
  19 use strict;
  20 use warnings;
  21 use Term::ReadLine;
  22 use Getopt::Long;
  23 use Text::ParseWords;
  24 use Data::Dumper;
  25 use Term::ANSIColor;
  26 use File::Temp qw/ tempdir tempfile /;
  27 use Error qw(:try);
  28 use Git;
  29
  30 Getopt::Long::Configure qw/ pass_through /;
  31
  32 package FakeTerm;
  33 sub new {
  34         my ($class, $reason) = @_;
  35         return bless \$reason, shift;
  36 }
  37 sub readline {
  38         my $self = shift;
  39         die "Cannot use readline on FakeTerm: $$self";
  40 }
  41 package main;
  42
  43
  44 sub usage {
  45         print <<EOT;
  46 git send-email [options] <file | directory | rev-list options >
  47
  48   Composing:
  49     --from                  <str>  * Email From:
  50     --[no-]to               <str>  * Email To:
  51     --[no-]cc               <str>  * Email Cc:
  52     --[no-]bcc              <str>  * Email Bcc:
  53     --subject               <str>  * Email "Subject:"
  54     --in-reply-to           <str>  * Email "In-Reply-To:"
  55     --annotate                     * Review each patch that will be sent in an editor.
  56     --compose                      * Open an editor for introduction.
  57
  58   Sending:
  59     --envelope-sender       <str>  * Email envelope sender.
  60     --smtp-server       <str:int>  * Outgoing SMTP server to use. The port
  61                                      is optional. Default 'localhost'.
  62     --smtp-server-port      <int>  * Outgoing SMTP server port.
  63     --smtp-user             <str>  * Username for SMTP-AUTH.
  64     --smtp-pass             <str>  * Password for SMTP-AUTH; not necessary.
  65     --smtp-encryption       <str>  * tls or ssl; anything else disables.
  66     --smtp-ssl                     * Deprecated. Use '--smtp-encryption ssl'.
  67     --smtp-domain           <str>  * The domain name sent to HELO/EHLO handshake
  68     --smtp-debug            <0|1>  * Disable, enable Net::SMTP debug.
  69
  70   Automating:
  71     --identity              <str>  * Use the sendemail.<id> options.
  72     --cc-cmd                <str>  * Email Cc: via `<str> \$patch_path`
  73     --suppress-cc           <str>  * author, self, sob, cc, cccmd, body, bodycc, all.
  74     --[no-]signed-off-by-cc        * Send to Signed-off-by: addresses. Default on.
  75     --[no-]suppress-from           * Send to self. Default off.
  76     --[no-]chain-reply-to          * Chain In-Reply-To: fields. Default off.
  77     --[no-]thread                  * Use In-Reply-To: field. Default on.
  78
  79   Administering:
  80     --confirm               <str>  * Confirm recipients before sending;
  81                                      auto, cc, compose, always, or never.
  82     --quiet                        * Output one line of info per email.
  83     --dry-run                      * Don't actually send the emails.
  84     --[no-]validate                * Perform patch sanity checks. Default on.
  85     --[no-]format-patch            * understand any non optional arguments as
  86                                      `git format-patch` ones.
  87
  88 EOT
  89         exit(1);
  90 }
  91
  92 # most mail servers generate the Date: header, but not all...
  93 sub format_2822_time {
  94         my ($time) = @_;
  95         my @localtm = localtime($time);
  96         my @gmttm = gmtime($time);
  97         my $localmin = $localtm[1] + $localtm[2] * 60;
  98         my $gmtmin = $gmttm[1] + $gmttm[2] * 60;
  99         if ($localtm[0] != $gmttm[0]) {
 100                 die "local zone differs from GMT by a non-minute interval\n";
 101         }
 102         if ((($gmttm[6] + 1) % 7) == $localtm[6]) {
 103                 $localmin += 1440;
 104         } elsif ((($gmttm[6] - 1) % 7) == $localtm[6]) {
 105                 $localmin -= 1440;
 106         } elsif ($gmttm[6] != $localtm[6]) {
 107                 die "local time offset greater than or equal to 24 hours\n";
 108         }
 109         my $offset = $localmin - $gmtmin;
 110         my $offhour = $offset / 60;
 111         my $offmin = abs($offset % 60);
 112         if (abs($offhour) >= 24) {
 113                 die ("local time offset greater than or equal to 24 hours\n");
 114         }
 115
 116         return sprintf("%s, %2d %s %d %02d:%02d:%02d %s%02d%02d",
 117                        qw(Sun Mon Tue Wed Thu Fri Sat)[$localtm[6]],
 118                        $localtm[3],
 119                        qw(Jan Feb Mar Apr May Jun
 120                           Jul Aug Sep Oct Nov Dec)[$localtm[4]],
 121                        $localtm[5]+1900,
 122                        $localtm[2],
 123                        $localtm[1],
 124                        $localtm[0],
 125                        ($offset >= 0) ? '+' : '-',
 126                        abs($offhour),
 127                        $offmin,
 128                        );
 129 }
 130
 131 my $have_email_valid = eval { require Email::Valid; 1 };
 132 my $have_mail_address = eval { require Mail::Address; 1 };
 133 my $smtp;
 134 my $auth;
 135
 136 sub unique_email_list(@);
 137 sub cleanup_compose_files();
 138
 139 # Variables we fill in automatically, or via prompting:
 140 my (@to,$no_to,@cc,$no_cc,@initial_cc,@bcclist,$no_bcc,@xh,
 141         $initial_reply_to,$initial_subject,@files,
 142         $author,$sender,$smtp_authpass,$annotate,$compose,$time);
 143
 144 my $envelope_sender;
 145
 146 # Example reply to:
 147 #$initial_reply_to = ''; #<20050203173208.GA23964@foobar.com>';
 148
 149 my $repo = eval { Git->repository() };
 150 my @repo = $repo ? ($repo) : ();
 151 my $term = eval {
 152         $ENV{"GIT_SEND_EMAIL_NOTTY"}
 153                 ? new Term::ReadLine 'git-send-email', \*STDIN, \*STDOUT
 154                 : new Term::ReadLine 'git-send-email';
 155 };
 156 if ($@) {
 157         $term = new FakeTerm "$@: going non-interactive";
 158 }
 159
 160 # Behavior modification variables
 161 my ($quiet, $dry_run) = (0, 0);
 162 my $format_patch;
 163 my $compose_filename;
 164
 165 # Handle interactive edition of files.
 166 my $multiedit;
 167 my $editor;
 168
 169 sub do_edit {
 170         if (!defined($editor)) {
 171                 $editor = Git::command_oneline('var', 'GIT_EDITOR');
 172         }
 173         if (defined($multiedit) && !$multiedit) {
 174                 map {
 175                         system('sh', '-c', $editor.' "$@"', $editor, $_);
 176                         if (($? & 127) || ($? >> 8)) {
 177                                 die("the editor exited uncleanly, aborting everything");
 178                         }
 179                 } @_;
 180         } else {
 181                 system('sh', '-c', $editor.' "$@"', $editor, @_);
 182                 if (($? & 127) || ($? >> 8)) {
 183                         die("the editor exited uncleanly, aborting everything");
 184                 }
 185         }
 186 }
 187
 188 # Variables with corresponding config settings
 189 my ($thread, $chain_reply_to, $suppress_from, $signed_off_by_cc, $cc_cmd);
 190 my ($smtp_server, $smtp_server_port, $smtp_authuser, $smtp_encryption);
 191 my ($identity, $aliasfiletype, @alias_files, @smtp_host_parts, $smtp_domain);
 192 my ($validate, $confirm);
 193 my (@suppress_cc);
 194
 195 my ($debug_net_smtp) = 0;               # Net::SMTP, see send_message()
 196
 197 my $not_set_by_user = "true but not set by the user";
 198
 199 my %config_bool_settings = (
 200     "thread" => [\$thread, 1],
 201     "chainreplyto" => [\$chain_reply_to, $not_set_by_user],
 202     "suppressfrom" => [\$suppress_from, undef],
 203     "signedoffbycc" => [\$signed_off_by_cc, undef],
 204     "signedoffcc" => [\$signed_off_by_cc, undef],      # Deprecated
 205     "validate" => [\$validate, 1],
 206 );
 207
 208 my %config_settings = (
 209     "smtpserver" => \$smtp_server,
 210     "smtpserverport" => \$smtp_server_port,
 211     "smtpuser" => \$smtp_authuser,
 212     "smtppass" => \$smtp_authpass,
 213         "smtpdomain" => \$smtp_domain,
 214     "to" => \@to,
 215     "cc" => \@initial_cc,
 216     "cccmd" => \$cc_cmd,
 217     "aliasfiletype" => \$aliasfiletype,
 218     "bcc" => \@bcclist,
 219     "aliasesfile" => \@alias_files,
 220     "suppresscc" => \@suppress_cc,
 221     "envelopesender" => \$envelope_sender,
 222     "multiedit" => \$multiedit,
 223     "confirm"   => \$confirm,
 224     "from" => \$sender,
 225 );
 226
 227 # Help users prepare for 1.7.0
 228 sub chain_reply_to {
 229         if (defined $chain_reply_to &&
 230             $chain_reply_to eq $not_set_by_user) {
 231                 print STDERR
 232                     "In git 1.7.0, the default has changed to --no-chain-reply-to\n" .
 233                     "Set sendemail.chainreplyto configuration variable to true if\n" .
 234                     "you want to keep --chain-reply-to as your default.\n";
 235                 $chain_reply_to = 0;
 236         }
 237         return $chain_reply_to;
 238 }
 239
 240 # Handle Uncouth Termination
 241 sub signal_handler {
 242
 243         # Make text normal
 244         print color("reset"), "\n";
 245
 246         # SMTP password masked
 247         system "stty echo";
 248
 249         # tmp files from --compose
 250         if (defined $compose_filename) {
 251                 if (-e $compose_filename) {
 252                         print "'$compose_filename' contains an intermediate version of the email you were composing.\n";
 253                 }
 254                 if (-e ($compose_filename . ".final")) {
 255                         print "'$compose_filename.final' contains the composed email.\n"
 256                 }
 257         }
 258
 259         exit;
 260 };
 261
 262 $SIG{TERM} = \&signal_handler;
 263 $SIG{INT}  = \&signal_handler;
 264
 265 # Begin by accumulating all the variables (defined above), that we will end up
 266 # needing, first, from the command line:
 267
 268 my $rc = GetOptions("sender|from=s" => \$sender,
 269                     "in-reply-to=s" => \$initial_reply_to,
 270                     "subject=s" => \$initial_subject,
 271                     "to=s" => \@to,
 272                     "no-to" => \$no_to,
 273                     "cc=s" => \@initial_cc,
 274                     "no-cc" => \$no_cc,
 275                     "bcc=s" => \@bcclist,
 276                     "no-bcc" => \$no_bcc,
 277                     "chain-reply-to!" => \$chain_reply_to,
 278                     "smtp-server=s" => \$smtp_server,
 279                     "smtp-server-port=s" => \$smtp_server_port,
 280                     "smtp-user=s" => \$smtp_authuser,
 281                     "smtp-pass:s" => \$smtp_authpass,
 282                     "smtp-ssl" => sub { $smtp_encryption = 'ssl' },
 283                     "smtp-encryption=s" => \$smtp_encryption,
 284                     "smtp-debug:i" => \$debug_net_smtp,
 285                     "smtp-domain:s" => \$smtp_domain,
 286                     "identity=s" => \$identity,
 287                     "annotate" => \$annotate,
 288                     "compose" => \$compose,
 289                     "quiet" => \$quiet,
 290                     "cc-cmd=s" => \$cc_cmd,
 291                     "suppress-from!" => \$suppress_from,
 292                     "suppress-cc=s" => \@suppress_cc,
 293                     "signed-off-cc|signed-off-by-cc!" => \$signed_off_by_cc,
 294                     "confirm=s" => \$confirm,
 295                     "dry-run" => \$dry_run,
 296                     "envelope-sender=s" => \$envelope_sender,
 297                     "thread!" => \$thread,
 298                     "validate!" => \$validate,
 299                     "format-patch!" => \$format_patch,
 300          );
 301
 302 unless ($rc) {
 303     usage();
 304 }
 305
 306 die "Cannot run git format-patch from outside a repository\n"
 307         if $format_patch and not $repo;
 308
 309 # Now, let's fill any that aren't set in with defaults:
 310
 311 sub read_config {
 312         my ($prefix) = @_;
 313
 314         foreach my $setting (keys %config_bool_settings) {
 315                 my $target = $config_bool_settings{$setting}->[0];
 316                 $$target = Git::config_bool(@repo, "$prefix.$setting") unless (defined $$target);
 317         }
 318
 319         foreach my $setting (keys %config_settings) {
 320                 my $target = $config_settings{$setting};
 321                 next if $setting eq "to" and defined $no_to;
 322                 next if $setting eq "cc" and defined $no_cc;
 323                 next if $setting eq "bcc" and defined $no_bcc;
 324                 if (ref($target) eq "ARRAY") {
 325                         unless (@$target) {
 326                                 my @values = Git::config(@repo, "$prefix.$setting");
 327                                 @$target = @values if (@values && defined $values[0]);
 328                         }
 329                 }
 330                 else {
 331                         $$target = Git::config(@repo, "$prefix.$setting") unless (defined $$target);
 332                 }
 333         }
 334
 335         if (!defined $smtp_encryption) {
 336                 my $enc = Git::config(@repo, "$prefix.smtpencryption");
 337                 if (defined $enc) {
 338                         $smtp_encryption = $enc;
 339                 } elsif (Git::config_bool(@repo, "$prefix.smtpssl")) {
 340                         $smtp_encryption = 'ssl';
 341                 }
 342         }
 343 }
 344
 345 # read configuration from [sendemail "$identity"], fall back on [sendemail]
 346 $identity = Git::config(@repo, "sendemail.identity") unless (defined $identity);
 347 read_config("sendemail.$identity") if (defined $identity);
 348 read_config("sendemail");
 349
 350 # fall back on builtin bool defaults
 351 foreach my $setting (values %config_bool_settings) {
 352         ${$setting->[0]} = $setting->[1] unless (defined (${$setting->[0]}));
 353 }
 354
 355 # 'default' encryption is none -- this only prevents a warning
 356 $smtp_encryption = '' unless (defined $smtp_encryption);
 357
 358 # Set CC suppressions
 359 my(%suppress_cc);
 360 if (@suppress_cc) {
 361         foreach my $entry (@suppress_cc) {
 362                 die "Unknown --suppress-cc field: '$entry'\n"
 363                         unless $entry =~ /^(all|cccmd|cc|author|self|sob|body|bodycc)$/;
 364                 $suppress_cc{$entry} = 1;
 365         }
 366 }
 367
 368 if ($suppress_cc{'all'}) {
 369         foreach my $entry (qw (cccmd cc author self sob body bodycc)) {
 370                 $suppress_cc{$entry} = 1;
 371         }
 372         delete $suppress_cc{'all'};
 373 }
 374
 375 # If explicit old-style ones are specified, they trump --suppress-cc.
 376 $suppress_cc{'self'} = $suppress_from if defined $suppress_from;
 377 $suppress_cc{'sob'} = !$signed_off_by_cc if defined $signed_off_by_cc;
 378
 379 if ($suppress_cc{'body'}) {
 380         foreach my $entry (qw (sob bodycc)) {
 381                 $suppress_cc{$entry} = 1;
 382         }
 383         delete $suppress_cc{'body'};
 384 }
 385
 386 # Set confirm's default value
 387 my $confirm_unconfigured = !defined $confirm;
 388 if ($confirm_unconfigured) {
 389         $confirm = scalar %suppress_cc ? 'compose' : 'auto';
 390 };
 391 die "Unknown --confirm setting: '$confirm'\n"
 392         unless $confirm =~ /^(?:auto|cc|compose|always|never)/;
 393
 394 # Debugging, print out the suppressions.
 395 if (0) {
 396         print "suppressions:\n";
 397         foreach my $entry (keys %suppress_cc) {
 398                 printf "  %-5s -> $suppress_cc{$entry}\n", $entry;
 399         }
 400 }
 401
 402 my ($repoauthor, $repocommitter);
 403 ($repoauthor) = Git::ident_person(@repo, 'author');
 404 ($repocommitter) = Git::ident_person(@repo, 'committer');
 405
 406 # Verify the user input
 407
 408 foreach my $entry (@to) {
 409         die "Comma in --to entry: $entry'\n" unless $entry !~ m/,/;
 410 }
 411
 412 foreach my $entry (@initial_cc) {
 413         die "Comma in --cc entry: $entry'\n" unless $entry !~ m/,/;
 414 }
 415
 416 foreach my $entry (@bcclist) {
 417         die "Comma in --bcclist entry: $entry'\n" unless $entry !~ m/,/;
 418 }
 419
 420 sub parse_address_line {
 421         if ($have_mail_address) {
 422                 return map { $_->format } Mail::Address->parse($_[0]);
 423         } else {
 424                 return split_addrs($_[0]);
 425         }
 426 }
 427
 428 sub split_addrs {
 429         return quotewords('\s*,\s*', 1, @_);
 430 }
 431
 432 my %aliases;
 433 my %parse_alias = (
 434         # multiline formats can be supported in the future
 435         mutt => sub { my $fh = shift; while (<$fh>) {
 436                 if (/^\s*alias\s+(?:-group\s+\S+\s+)*(\S+)\s+(.*)$/) {
 437                         my ($alias, $addr) = ($1, $2);
 438                         $addr =~ s/#.*$//; # mutt allows # comments
 439                          # commas delimit multiple addresses
 440                         $aliases{$alias} = [ split_addrs($addr) ];
 441                 }}},
 442         mailrc => sub { my $fh = shift; while (<$fh>) {
 443                 if (/^alias\s+(\S+)\s+(.*)$/) {
 444                         # spaces delimit multiple addresses
 445                         $aliases{$1} = [ quotewords('\s+', 0, $2) ];
 446                 }}},
 447         pine => sub { my $fh = shift; my $f='\t[^\t]*';
 448                 for (my $x = ''; defined($x); $x = $_) {
 449                         chomp $x;
 450                         $x .= $1 while(defined($_ = <$fh>) && /^ +(.*)$/);
 451                         $x =~ /^(\S+)$f\t\(?([^\t]+?)\)?(:?$f){0,2}$/ or next;
 452                         $aliases{$1} = [ split_addrs($2) ];
 453                 }},
 454         elm => sub  { my $fh = shift;
 455                       while (<$fh>) {
 456                           if (/^(\S+)\s+=\s+[^=]+=\s(\S+)/) {
 457                               my ($alias, $addr) = ($1, $2);
 458                                $aliases{$alias} = [ split_addrs($addr) ];
 459                           }
 460                       } },
 461
 462         gnus => sub { my $fh = shift; while (<$fh>) {
 463                 if (/\(define-mail-alias\s+"(\S+?)"\s+"(\S+?)"\)/) {
 464                         $aliases{$1} = [ $2 ];
 465                 }}}
 466 );
 467
 468 if (@alias_files and $aliasfiletype and defined $parse_alias{$aliasfiletype}) {
 469         foreach my $file (@alias_files) {
 470                 open my $fh, '<', $file or die "opening $file: $!\n";
 471                 $parse_alias{$aliasfiletype}->($fh);
 472                 close $fh;
 473         }
 474 }
 475
 476 ($sender) = expand_aliases($sender) if defined $sender;
 477
 478 # returns 1 if the conflict must be solved using it as a format-patch argument
 479 sub check_file_rev_conflict($) {
 480         return unless $repo;
 481         my $f = shift;
 482         try {
 483                 $repo->command('rev-parse', '--verify', '--quiet', $f);
 484                 if (defined($format_patch)) {
 485                         return $format_patch;
 486                 }
 487                 die(<<EOF);
 488 File '$f' exists but it could also be the range of commits
 489 to produce patches for.  Please disambiguate by...
 490
 491     * Saying "./$f" if you mean a file; or
 492     * Giving --format-patch option if you mean a range.
 493 EOF
 494         } catch Git::Error::Command with {
 495                 return 0;
 496         }
 497 }
 498
 499 # Now that all the defaults are set, process the rest of the command line
 500 # arguments and collect up the files that need to be processed.
 501 my @rev_list_opts;
 502 while (defined(my $f = shift @ARGV)) {
 503         if ($f eq "--") {
 504                 push @rev_list_opts, "--", @ARGV;
 505                 @ARGV = ();
 506         } elsif (-d $f and !check_file_rev_conflict($f)) {
 507                 opendir(DH,$f)
 508                         or die "Failed to opendir $f: $!";
 509
 510                 push @files, grep { -f $_ } map { +$f . "/" . $_ }
 511                                 sort readdir(DH);
 512                 closedir(DH);
 513         } elsif ((-f $f or -p $f) and !check_file_rev_conflict($f)) {
 514                 push @files, $f;
 515         } else {
 516                 push @rev_list_opts, $f;
 517         }
 518 }
 519
 520 if (@rev_list_opts) {
 521         die "Cannot run git format-patch from outside a repository\n"
 522                 unless $repo;
 523         push @files, $repo->command('format-patch', '-o', tempdir(CLEANUP => 1), @rev_list_opts);
 524 }
 525
 526 if ($validate) {
 527         foreach my $f (@files) {
 528                 unless (-p $f) {
 529                         my $error = validate_patch($f);
 530                         $error and die "fatal: $f: $error\nwarning: no patches were sent\n";
 531                 }
 532         }
 533 }
 534
 535 if (@files) {
 536         unless ($quiet) {
 537                 print $_,"\n" for (@files);
 538         }
 539 } else {
 540         print STDERR "\nNo patch files specified!\n\n";
 541         usage();
 542 }
 543
 544 sub get_patch_subject($) {
 545         my $fn = shift;
 546         open (my $fh, '<', $fn);
 547         while (my $line = <$fh>) {
 548                 next unless ($line =~ /^Subject: (.*)$/);
 549                 close $fh;
 550                 return "GIT: $1\n";
 551         }
 552         close $fh;
 553         die "No subject line in $fn ?";
 554 }
 555
 556 if ($compose) {
 557         # Note that this does not need to be secure, but we will make a small
 558         # effort to have it be unique
 559         $compose_filename = ($repo ?
 560                 tempfile(".gitsendemail.msg.XXXXXX", DIR => $repo->repo_path()) :
 561                 tempfile(".gitsendemail.msg.XXXXXX", DIR => "."))[1];
 562         open(C,">",$compose_filename)
 563                 or die "Failed to open for writing $compose_filename: $!";
 564
 565
 566         my $tpl_sender = $sender || $repoauthor || $repocommitter || '';
 567         my $tpl_subject = $initial_subject || '';
 568         my $tpl_reply_to = $initial_reply_to || '';
 569
 570         print C <<EOT;
 571 From $tpl_sender # This line is ignored.
 572 GIT: Lines beginning in "GIT:" will be removed.
 573 GIT: Consider including an overall diffstat or table of contents
 574 GIT: for the patch you are writing.
 575 GIT:
 576 GIT: Clear the body content if you don't wish to send a summary.
 577 From: $tpl_sender
 578 Subject: $tpl_subject
 579 In-Reply-To: $tpl_reply_to
 580
 581 EOT
 582         for my $f (@files) {
 583                 print C get_patch_subject($f);
 584         }
 585         close(C);
 586
 587         if ($annotate) {
 588                 do_edit($compose_filename, @files);
 589         } else {
 590                 do_edit($compose_filename);
 591         }
 592
 593         open(C2,">",$compose_filename . ".final")
 594                 or die "Failed to open $compose_filename.final : " . $!;
 595
 596         open(C,"<",$compose_filename)
 597                 or die "Failed to open $compose_filename : " . $!;
 598
 599         my $need_8bit_cte = file_has_nonascii($compose_filename);
 600         my $in_body = 0;
 601         my $summary_empty = 1;
 602         while(<C>) {
 603                 next if m/^GIT:/;
 604                 if ($in_body) {
 605                         $summary_empty = 0 unless (/^\n$/);
 606                 } elsif (/^\n$/) {
 607                         $in_body = 1;
 608                         if ($need_8bit_cte) {
 609                                 print C2 "MIME-Version: 1.0\n",
 610                                          "Content-Type: text/plain; ",
 611                                            "charset=UTF-8\n",
 612                                          "Content-Transfer-Encoding: 8bit\n";
 613                         }
 614                 } elsif (/^MIME-Version:/i) {
 615                         $need_8bit_cte = 0;
 616                 } elsif (/^Subject:\s*(.+)\s*$/i) {
 617                         $initial_subject = $1;
 618                         my $subject = $initial_subject;
 619                         $_ = "Subject: " .
 620                                 ($subject =~ /[^[:ascii:]]/ ?
 621                                  quote_rfc2047($subject) :
 622                                  $subject) .
 623                                 "\n";
 624                 } elsif (/^In-Reply-To:\s*(.+)\s*$/i) {
 625                         $initial_reply_to = $1;
 626                         next;
 627                 } elsif (/^From:\s*(.+)\s*$/i) {
 628                         $sender = $1;
 629                         next;
 630                 } elsif (/^(?:To|Cc|Bcc):/i) {
 631                         print "To/Cc/Bcc fields are not interpreted yet, they have been ignored\n";
 632                         next;
 633                 }
 634                 print C2 $_;
 635         }
 636         close(C);
 637         close(C2);
 638
 639         if ($summary_empty) {
 640                 print "Summary email is empty, skipping it\n";
 641                 $compose = -1;
 642         }
 643 } elsif ($annotate) {
 644         do_edit(@files);
 645 }
 646
 647 sub ask {
 648         my ($prompt, %arg) = @_;
 649         my $valid_re = $arg{valid_re};
 650         my $default = $arg{default};
 651         my $resp;
 652         my $i = 0;
 653         return defined $default ? $default : undef
 654                 unless defined $term->IN and defined fileno($term->IN) and
 655                        defined $term->OUT and defined fileno($term->OUT);
 656         while ($i++ < 10) {
 657                 $resp = $term->readline($prompt);
 658                 if (!defined $resp) { # EOF
 659                         print "\n";
 660                         return defined $default ? $default : undef;
 661                 }
 662                 if ($resp eq '' and defined $default) {
 663                         return $default;
 664                 }
 665                 if (!defined $valid_re or $resp =~ /$valid_re/) {
 666                         return $resp;
 667                 }
 668         }
 669         return undef;
 670 }
 671
 672 my $prompting = 0;
 673 if (!defined $sender) {
 674         $sender = $repoauthor || $repocommitter || '';
 675         $sender = ask("Who should the emails appear to be from? [$sender] ",
 676                       default => $sender);
 677         print "Emails will be sent from: ", $sender, "\n";
 678         $prompting++;
 679 }
 680
 681 if (!@to) {
 682         my $to = ask("Who should the emails be sent to? ");
 683         push @to, parse_address_line($to) if defined $to; # sanitized/validated later
 684         $prompting++;
 685 }
 686
 687 sub expand_aliases {
 688         return map { expand_one_alias($_) } @_;
 689 }
 690
 691 my %EXPANDED_ALIASES;
 692 sub expand_one_alias {
 693         my $alias = shift;
 694         if ($EXPANDED_ALIASES{$alias}) {
 695                 die "fatal: alias '$alias' expands to itself\n";
 696         }
 697         local $EXPANDED_ALIASES{$alias} = 1;
 698         return $aliases{$alias} ? expand_aliases(@{$aliases{$alias}}) : $alias;
 699 }
 700
 701 @to = expand_aliases(@to);
 702 @to = (map { sanitize_address($_) } @to);
 703 @initial_cc = expand_aliases(@initial_cc);
 704 @bcclist = expand_aliases(@bcclist);
 705
 706 if ($thread && !defined $initial_reply_to && $prompting) {
 707         $initial_reply_to = ask(
 708                 "Message-ID to be used as In-Reply-To for the first email? ");
 709 }
 710 if (defined $initial_reply_to) {
 711         $initial_reply_to =~ s/^\s*<?//;
 712         $initial_reply_to =~ s/>?\s*$//;
 713         $initial_reply_to = "<$initial_reply_to>" if $initial_reply_to ne '';
 714 }
 715
 716 if (!defined $smtp_server) {
 717         foreach (qw( /usr/sbin/sendmail /usr/lib/sendmail )) {
 718                 if (-x $_) {
 719                         $smtp_server = $_;
 720                         last;
 721                 }
 722         }
 723         $smtp_server ||= 'localhost'; # could be 127.0.0.1, too... *shrug*
 724 }
 725
 726 if ($compose && $compose > 0) {
 727         @files = ($compose_filename . ".final", @files);
 728 }
 729
 730 # Variables we set as part of the loop over files
 731 our ($message_id, %mail, $subject, $reply_to, $references, $message,
 732         $needs_confirm, $message_num, $ask_default);
 733
 734 sub extract_valid_address {
 735         my $address = shift;
 736         my $local_part_regexp = '[^<>"\s@]+';
 737         my $domain_regexp = '[^.<>"\s@]+(?:\.[^.<>"\s@]+)+';
 738
 739         # check for a local address:
 740         return $address if ($address =~ /^($local_part_regexp)$/);
 741
 742         $address =~ s/^\s*<(.*)>\s*$/$1/;
 743         if ($have_email_valid) {
 744                 return scalar Email::Valid->address($address);
 745         } else {
 746                 # less robust/correct than the monster regexp in Email::Valid,
 747                 # but still does a 99% job, and one less dependency
 748                 $address =~ /($local_part_regexp\@$domain_regexp)/;
 749                 return $1;
 750         }
 751 }
 752
 753 # Usually don't need to change anything below here.
 754
 755 # we make a "fake" message id by taking the current number
 756 # of seconds since the beginning of Unix time and tacking on
 757 # a random number to the end, in case we are called quicker than
 758 # 1 second since the last time we were called.
 759
 760 # We'll setup a template for the message id, using the "from" address:
 761
 762 my ($message_id_stamp, $message_id_serial);
 763 sub make_message_id {
 764         my $uniq;
 765         if (!defined $message_id_stamp) {
 766                 $message_id_stamp = sprintf("%s-%s", time, $$);
 767                 $message_id_serial = 0;
 768         }
 769         $message_id_serial++;
 770         $uniq = "$message_id_stamp-$message_id_serial";
 771
 772         my $du_part;
 773         for ($sender, $repocommitter, $repoauthor) {
 774                 $du_part = extract_valid_address(sanitize_address($_));
 775                 last if (defined $du_part and $du_part ne '');
 776         }
 777         if (not defined $du_part or $du_part eq '') {
 778                 use Sys::Hostname qw();
 779                 $du_part = 'user@' . Sys::Hostname::hostname();
 780         }
 781         my $message_id_template = "<%s-git-send-email-%s>";
 782         $message_id = sprintf($message_id_template, $uniq, $du_part);
 783         #print "new message id = $message_id\n"; # Was useful for debugging
 784 }
 785
 786
 787
 788 $time = time - scalar $#files;
 789
 790 sub unquote_rfc2047 {
 791         local ($_) = @_;
 792         my $encoding;
 793         if (s/=\?([^?]+)\?q\?(.*)\?=/$2/g) {
 794                 $encoding = $1;
 795                 s/_/ /g;
 796                 s/=([0-9A-F]{2})/chr(hex($1))/eg;
 797         }
 798         return wantarray ? ($_, $encoding) : $_;
 799 }
 800
 801 sub quote_rfc2047 {
 802         local $_ = shift;
 803         my $encoding = shift || 'UTF-8';
 804         s/([^-a-zA-Z0-9!*+\/])/sprintf("=%02X", ord($1))/eg;
 805         s/(.*)/=\?$encoding\?q\?$1\?=/;
 806         return $_;
 807 }
 808
 809 sub is_rfc2047_quoted {
 810         my $s = shift;
 811         my $token = '[^][()<>@,;:"\/?.= \000-\037\177-\377]+';
 812         my $encoded_text = '[!->@-~]+';
 813         length($s) <= 75 &&
 814         $s =~ m/^(?:"[[:ascii:]]*"|=\?$token\?$token\?$encoded_text\?=)$/o;
 815 }
 816
 817 # use the simplest quoting being able to handle the recipient
 818 sub sanitize_address {
 819         my ($recipient) = @_;
 820         my ($recipient_name, $recipient_addr) = ($recipient =~ /^(.*?)\s*(<.*)/);
 821
 822         if (not $recipient_name) {
 823                 return "$recipient";
 824         }
 825
 826         # if recipient_name is already quoted, do nothing
 827         if (is_rfc2047_quoted($recipient_name)) {
 828                 return $recipient;
 829         }
 830
 831         # rfc2047 is needed if a non-ascii char is included
 832         if ($recipient_name =~ /[^[:ascii:]]/) {
 833                 $recipient_name =~ s/^"(.*)"$/$1/;
 834                 $recipient_name = quote_rfc2047($recipient_name);
 835         }
 836
 837         # double quotes are needed if specials or CTLs are included
 838         elsif ($recipient_name =~ /[][()<>@,;:\\".\000-\037\177]/) {
 839                 $recipient_name =~ s/(["\\\r])/\\$1/g;
 840                 $recipient_name = "\"$recipient_name\"";
 841         }
 842
 843         return "$recipient_name $recipient_addr";
 844
 845 }
 846
 847 # Returns the local Fully Qualified Domain Name (FQDN) if available.
 848 #
 849 # Tightly configured MTAa require that a caller sends a real DNS
 850 # domain name that corresponds the IP address in the HELO/EHLO
 851 # handshake. This is used to verify the connection and prevent
 852 # spammers from trying to hide their identity. If the DNS and IP don't
 853 # match, the receiveing MTA may deny the connection.
 854 #
 855 # Here is a deny example of Net::SMTP with the default "localhost.localdomain"
 856 #
 857 # Net::SMTP=GLOB(0x267ec28)>>> EHLO localhost.localdomain
 858 # Net::SMTP=GLOB(0x267ec28)<<< 550 EHLO argument does not match calling host
 859 #
 860 # This maildomain*() code is based on ideas in Perl library Test::Reporter
 861 # /usr/share/perl5/Test/Reporter/Mail/Util.pm ==> sub _maildomain ()
 862
 863 sub valid_fqdn {
 864         my $domain = shift;
 865         return !($^O eq 'darwin' && $domain =~ /\.local$/) && $domain =~ /\./;
 866 }
 867
 868 sub maildomain_net {
 869         my $maildomain;
 870
 871         if (eval { require Net::Domain; 1 }) {
 872                 my $domain = Net::Domain::domainname();
 873                 $maildomain = $domain if valid_fqdn($domain);
 874         }
 875
 876         return $maildomain;
 877 }
 878
 879 sub maildomain_mta {
 880         my $maildomain;
 881
 882         if (eval { require Net::SMTP; 1 }) {
 883                 for my $host (qw(mailhost localhost)) {
 884                         my $smtp = Net::SMTP->new($host);
 885                         if (defined $smtp) {
 886                                 my $domain = $smtp->domain;
 887                                 $smtp->quit;
 888
 889                                 $maildomain = $domain if valid_fqdn($domain);
 890
 891                                 last if $maildomain;
 892                         }
 893                 }
 894         }
 895
 896         return $maildomain;
 897 }
 898
 899 sub maildomain {
 900         return maildomain_net() || maildomain_mta() || 'localhost.localdomain';
 901 }
 902
 903 # Returns 1 if the message was sent, and 0 otherwise.
 904 # In actuality, the whole program dies when there
 905 # is an error sending a message.
 906
 907 sub send_message {
 908         my @recipients = unique_email_list(@to);
 909         @cc = (grep { my $cc = extract_valid_address($_);
 910                       not grep { $cc eq $_ } @recipients
 911                     }
 912                map { sanitize_address($_) }
 913                @cc);
 914         my $to = join (",\n\t", @recipients);
 915         @recipients = unique_email_list(@recipients,@cc,@bcclist);
 916         @recipients = (map { extract_valid_address($_) } @recipients);
 917         my $date = format_2822_time($time++);
 918         my $gitversion = '@@GIT_VERSION@@';
 919         if ($gitversion =~ m/..GIT_VERSION../) {
 920             $gitversion = Git::version();
 921         }
 922
 923         my $cc = join(",\n\t", unique_email_list(@cc));
 924         my $ccline = "";
 925         if ($cc ne '') {
 926                 $ccline = "\nCc: $cc";
 927         }
 928         my $sanitized_sender = sanitize_address($sender);
 929         make_message_id() unless defined($message_id);
 930
 931         my $header = "From: $sanitized_sender
 932 To: $to${ccline}
 933 Subject: $subject
 934 Date: $date
 935 Message-Id: $message_id
 936 X-Mailer: git-send-email $gitversion
 937 ";
 938         if ($reply_to) {
 939
 940                 $header .= "In-Reply-To: $reply_to\n";
 941                 $header .= "References: $references\n";
 942         }
 943         if (@xh) {
 944                 $header .= join("\n", @xh) . "\n";
 945         }
 946
 947         my @sendmail_parameters = ('-i', @recipients);
 948         my $raw_from = $sanitized_sender;
 949         if (defined $envelope_sender && $envelope_sender ne "auto") {
 950                 $raw_from = $envelope_sender;
 951         }
 952         $raw_from = extract_valid_address($raw_from);
 953         unshift (@sendmail_parameters,
 954                         '-f', $raw_from) if(defined $envelope_sender);
 955
 956         if ($needs_confirm && !$dry_run) {
 957                 print "\n$header\n";
 958                 if ($needs_confirm eq "inform") {
 959                         $confirm_unconfigured = 0; # squelch this message for the rest of this run
 960                         $ask_default = "y"; # assume yes on EOF since user hasn't explicitly asked for confirmation
 961                         print "    The Cc list above has been expanded by additional\n";
 962                         print "    addresses found in the patch commit message. By default\n";
 963                         print "    send-email prompts before sending whenever this occurs.\n";
 964                         print "    This behavior is controlled by the sendemail.confirm\n";
 965                         print "    configuration setting.\n";
 966                         print "\n";
 967                         print "    For additional information, run 'git send-email --help'.\n";
 968                         print "    To retain the current behavior, but squelch this message,\n";
 969                         print "    run 'git config --global sendemail.confirm auto'.\n\n";
 970                 }
 971                 $_ = ask("Send this email? ([y]es|[n]o|[q]uit|[a]ll): ",
 972                          valid_re => qr/^(?:yes|y|no|n|quit|q|all|a)/i,
 973                          default => $ask_default);
 974                 die "Send this email reply required" unless defined $_;
 975                 if (/^n/i) {
 976                         return 0;
 977                 } elsif (/^q/i) {
 978                         cleanup_compose_files();
 979                         exit(0);
 980                 } elsif (/^a/i) {
 981                         $confirm = 'never';
 982                 }
 983         }
 984
 985         if ($dry_run) {
 986                 # We don't want to send the email.
 987         } elsif ($smtp_server =~ m#^/#) {
 988                 my $pid = open my $sm, '|-';
 989                 defined $pid or die $!;
 990                 if (!$pid) {
 991                         exec($smtp_server, @sendmail_parameters) or die $!;
 992                 }
 993                 print $sm "$header\n$message";
 994                 close $sm or die $?;
 995         } else {
 996
 997                 if (!defined $smtp_server) {
 998                         die "The required SMTP server is not properly defined."
 999                 }
1000
1001                 if ($smtp_encryption eq 'ssl') {
1002                         $smtp_server_port ||= 465; # ssmtp
1003                         require Net::SMTP::SSL;
1004                         $smtp_domain ||= maildomain();
1005                         $smtp ||= Net::SMTP::SSL->new($smtp_server,
1006                                                       Hello => $smtp_domain,
1007                                                       Port => $smtp_server_port);
1008                 }
1009                 else {
1010                         require Net::SMTP;
1011                         $smtp_domain ||= maildomain();
1012                         $smtp ||= Net::SMTP->new((defined $smtp_server_port)
1013                                                  ? "$smtp_server:$smtp_server_port"
1014                                                  : $smtp_server,
1015                                                  Hello => $smtp_domain,
1016                                                  Debug => $debug_net_smtp);
1017                         if ($smtp_encryption eq 'tls' && $smtp) {
1018                                 require Net::SMTP::SSL;
1019                                 $smtp->command('STARTTLS');
1020                                 $smtp->response();
1021                                 if ($smtp->code == 220) {
1022                                         $smtp = Net::SMTP::SSL->start_SSL($smtp)
1023                                                 or die "STARTTLS failed! ".$smtp->message;
1024                                         $smtp_encryption = '';
1025                                         # Send EHLO again to receive fresh
1026                                         # supported commands
1027                                         $smtp->hello();
1028                                 } else {
1029                                         die "Server does not support STARTTLS! ".$smtp->message;
1030                                 }
1031                         }
1032                 }
1033
1034                 if (!$smtp) {
1035                         die "Unable to initialize SMTP properly. Check config and use --smtp-debug. ",
1036                             "VALUES: server=$smtp_server ",
1037                             "encryption=$smtp_encryption ",
1038                             "hello=$smtp_domain",
1039                             defined $smtp_server_port ? "port=$smtp_server_port" : "";
1040                 }
1041
1042                 if (defined $smtp_authuser) {
1043
1044                         if (!defined $smtp_authpass) {
1045
1046                                 system "stty -echo";
1047
1048                                 do {
1049                                         print "Password: ";
1050                                         $_ = <STDIN>;
1051                                         print "\n";
1052                                 } while (!defined $_);
1053
1054                                 chomp($smtp_authpass = $_);
1055
1056                                 system "stty echo";
1057                         }
1058
1059                         $auth ||= $smtp->auth( $smtp_authuser, $smtp_authpass ) or die $smtp->message;
1060                 }
1061
1062                 $smtp->mail( $raw_from ) or die $smtp->message;
1063                 $smtp->to( @recipients ) or die $smtp->message;
1064                 $smtp->data or die $smtp->message;
1065                 $smtp->datasend("$header\n$message") or die $smtp->message;
1066                 $smtp->dataend() or die $smtp->message;
1067                 $smtp->code =~ /250|200/ or die "Failed to send $subject\n".$smtp->message;
1068         }
1069         if ($quiet) {
1070                 printf (($dry_run ? "Dry-" : "")."Sent %s\n", $subject);
1071         } else {
1072                 print (($dry_run ? "Dry-" : "")."OK. Log says:\n");
1073                 if ($smtp_server !~ m#^/#) {
1074                         print "Server: $smtp_server\n";
1075                         print "MAIL FROM:<$raw_from>\n";
1076                         foreach my $entry (@recipients) {
1077                             print "RCPT TO:<$entry>\n";
1078                         }
1079                 } else {
1080                         print "Sendmail: $smtp_server ".join(' ',@sendmail_parameters)."\n";
1081                 }
1082                 print $header, "\n";
1083                 if ($smtp) {
1084                         print "Result: ", $smtp->code, ' ',
1085                                 ($smtp->message =~ /\n([^\n]+\n)$/s), "\n";
1086                 } else {
1087                         print "Result: OK\n";
1088                 }
1089         }
1090
1091         return 1;
1092 }
1093
1094 $reply_to = $initial_reply_to;
1095 $references = $initial_reply_to || '';
1096 $subject = $initial_subject;
1097 $message_num = 0;
1098
1099 foreach my $t (@files) {
1100         open(F,"<",$t) or die "can't open file $t";
1101
1102         my $author = undef;
1103         my $author_encoding;
1104         my $has_content_type;
1105         my $body_encoding;
1106         @cc = ();
1107         @xh = ();
1108         my $input_format = undef;
1109         my @header = ();
1110         $message = "";
1111         $message_num++;
1112         # First unfold multiline header fields
1113         while(<F>) {
1114                 last if /^\s*$/;
1115                 if (/^\s+\S/ and @header) {
1116                         chomp($header[$#header]);
1117                         s/^\s+/ /;
1118                         $header[$#header] .= $_;
1119             } else {
1120                         push(@header, $_);
1121                 }
1122         }
1123         # Now parse the header
1124         foreach(@header) {
1125                 if (/^From /) {
1126                         $input_format = 'mbox';
1127                         next;
1128                 }
1129                 chomp;
1130                 if (!defined $input_format && /^[-A-Za-z]+:\s/) {
1131                         $input_format = 'mbox';
1132                 }
1133
1134                 if (defined $input_format && $input_format eq 'mbox') {
1135                         if (/^Subject:\s+(.*)$/) {
1136                                 $subject = $1;
1137                         }
1138                         elsif (/^From:\s+(.*)$/) {
1139                                 ($author, $author_encoding) = unquote_rfc2047($1);
1140                                 next if $suppress_cc{'author'};
1141                                 next if $suppress_cc{'self'} and $author eq $sender;
1142                                 printf("(mbox) Adding cc: %s from line '%s'\n",
1143                                         $1, $_) unless $quiet;
1144                                 push @cc, $1;
1145                         }
1146                         elsif (/^Cc:\s+(.*)$/) {
1147                                 foreach my $addr (parse_address_line($1)) {
1148                                         if (unquote_rfc2047($addr) eq $sender) {
1149                                                 next if ($suppress_cc{'self'});
1150                                         } else {
1151                                                 next if ($suppress_cc{'cc'});
1152                                         }
1153                                         printf("(mbox) Adding cc: %s from line '%s'\n",
1154                                                 $addr, $_) unless $quiet;
1155                                         push @cc, $addr;
1156                                 }
1157                         }
1158                         elsif (/^Content-type:/i) {
1159                                 $has_content_type = 1;
1160                                 if (/charset="?([^ "]+)/) {
1161                                         $body_encoding = $1;
1162                                 }
1163                                 push @xh, $_;
1164                         }
1165                         elsif (/^Message-Id: (.*)/i) {
1166                                 $message_id = $1;
1167                         }
1168                         elsif (!/^Date:\s/ && /^[-A-Za-z]+:\s+\S/) {
1169                                 push @xh, $_;
1170                         }
1171
1172                 } else {
1173                         # In the traditional
1174                         # "send lots of email" format,
1175                         # line 1 = cc
1176                         # line 2 = subject
1177                         # So let's support that, too.
1178                         $input_format = 'lots';
1179                         if (@cc == 0 && !$suppress_cc{'cc'}) {
1180                                 printf("(non-mbox) Adding cc: %s from line '%s'\n",
1181                                         $_, $_) unless $quiet;
1182                                 push @cc, $_;
1183                         } elsif (!defined $subject) {
1184                                 $subject = $_;
1185                         }
1186                 }
1187         }
1188         # Now parse the message body
1189         while(<F>) {
1190                 $message .=  $_;
1191                 if (/^(Signed-off-by|Cc): (.*)$/i) {
1192                         chomp;
1193                         my ($what, $c) = ($1, $2);
1194                         chomp $c;
1195                         if ($c eq $sender) {
1196                                 next if ($suppress_cc{'self'});
1197                         } else {
1198                                 next if $suppress_cc{'sob'} and $what =~ /Signed-off-by/i;
1199                                 next if $suppress_cc{'bodycc'} and $what =~ /Cc/i;
1200                         }
1201                         push @cc, $c;
1202                         printf("(body) Adding cc: %s from line '%s'\n",
1203                                 $c, $_) unless $quiet;
1204                 }
1205         }
1206         close F;
1207
1208         if (defined $cc_cmd && !$suppress_cc{'cccmd'}) {
1209                 open(F, "$cc_cmd \Q$t\E |")
1210                         or die "(cc-cmd) Could not execute '$cc_cmd'";
1211                 while(<F>) {
1212                         my $c = $_;
1213                         $c =~ s/^\s*//g;
1214                         $c =~ s/\n$//g;
1215                         next if ($c eq $sender and $suppress_from);
1216                         push @cc, $c;
1217                         printf("(cc-cmd) Adding cc: %s from: '%s'\n",
1218                                 $c, $cc_cmd) unless $quiet;
1219                 }
1220                 close F
1221                         or die "(cc-cmd) failed to close pipe to '$cc_cmd'";
1222         }
1223
1224         if (defined $author and $author ne $sender) {
1225                 $message = "From: $author\n\n$message";
1226                 if (defined $author_encoding) {
1227                         if ($has_content_type) {
1228                                 if ($body_encoding eq $author_encoding) {
1229                                         # ok, we already have the right encoding
1230                                 }
1231                                 else {
1232                                         # uh oh, we should re-encode
1233                                 }
1234                         }
1235                         else {
1236                                 push @xh,
1237                                   'MIME-Version: 1.0',
1238                                   "Content-Type: text/plain; charset=$author_encoding",
1239                                   'Content-Transfer-Encoding: 8bit';
1240                         }
1241                 }
1242         }
1243
1244         $needs_confirm = (
1245                 $confirm eq "always" or
1246                 ($confirm =~ /^(?:auto|cc)$/ && @cc) or
1247                 ($confirm =~ /^(?:auto|compose)$/ && $compose && $message_num == 1));
1248         $needs_confirm = "inform" if ($needs_confirm && $confirm_unconfigured && @cc);
1249
1250         @cc = (@initial_cc, @cc);
1251
1252         my $message_was_sent = send_message();
1253
1254         # set up for the next message
1255         if ($thread && $message_was_sent &&
1256                 (chain_reply_to() || !defined $reply_to || length($reply_to) == 0)) {
1257                 $reply_to = $message_id;
1258                 if (length $references > 0) {
1259                         $references .= "\n $message_id";
1260                 } else {
1261                         $references = "$message_id";
1262                 }
1263         }
1264         $message_id = undef;
1265 }
1266
1267 cleanup_compose_files();
1268
1269 sub cleanup_compose_files() {
1270         unlink($compose_filename, $compose_filename . ".final") if $compose;
1271 }
1272
1273 $smtp->quit if $smtp;
1274
1275 sub unique_email_list(@) {
1276         my %seen;
1277         my @emails;
1278
1279         foreach my $entry (@_) {
1280                 if (my $clean = extract_valid_address($entry)) {
1281                         $seen{$clean} ||= 0;
1282                         next if $seen{$clean}++;
1283                         push @emails, $entry;
1284                 } else {
1285                         print STDERR "W: unable to extract a valid address",
1286                                         " from: $entry\n";
1287                 }
1288         }
1289         return @emails;
1290 }
1291
1292 sub validate_patch {
1293         my $fn = shift;
1294         open(my $fh, '<', $fn)
1295                 or die "unable to open $fn: $!\n";
1296         while (my $line = <$fh>) {
1297                 if (length($line) > 998) {
1298                         return "$.: patch contains a line longer than 998 characters";
1299                 }
1300         }
1301         return undef;
1302 }
1303
1304 sub file_has_nonascii {
1305         my $fn = shift;
1306         open(my $fh, '<', $fn)
1307                 or die "unable to open $fn: $!\n";
1308         while (my $line = <$fh>) {
1309                 return 1 if $line =~ /[^[:ascii:]]/;
1310         }
1311         return 0;
1312 }