lib-src/b2m.pl

   1 #!/usr/bin/perl
   2
   3 # b2m.pl - Script to convert a Babyl file to an mbox file
   4
   5 # Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
   6 #   Free Software Foundation, Inc.
   7
   8 # Maintainer: Jonathan Kamens <jik@kamens.brookline.ma.us>
   9
  10 # This program is free software: you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation, either version 3 of the License, or
  13 # (at your option) any later version.
  14
  15 # This program is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 # GNU General Public License for more details.
  19
  20 # You should have received a copy of the GNU General Public License
  21 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22
  23
  24 # Requires CPAN modules: MailTools (for Mail::Address), TimeDate (for
  25 # Date::Parse).
  26
  27 use warnings;
  28 use strict;
  29 use File::Basename;
  30 use Getopt::Long;
  31 use Mail::Address;
  32 use Date::Parse;
  33
  34 my($whoami) = basename $0;
  35 my($version) = '$Revision$';
  36 my($usage) = "Usage: $whoami [--help] [--version] [--[no]full-headers] [Babyl-file]
  37 \tBy default, full headers are printed.\n";
  38
  39 my($opt_help, $opt_version);
  40 my($opt_full_headers) = 1;
  41
  42 die $usage if (! GetOptions(
  43                             'help' => \$opt_help,
  44                             'version' => \$opt_version,
  45                             'full-headers!' => \$opt_full_headers,
  46                             ));
  47
  48 if ($opt_help) {
  49     print $usage;
  50     exit;
  51 }
  52 elsif ($opt_version) {
  53     print "$whoami version: $version\n";
  54     exit;
  55 }
  56
  57 die $usage if (@ARGV > 1);
  58
  59 $/ = "\n\037";
  60
  61 if (<> !~ /^BABYL OPTIONS:/) {
  62     die "$whoami: $ARGV is not a Babyl file\n$usage";
  63 }
  64
  65 while (<>) {
  66     my($msg_num) = $. - 1;
  67     my($labels, $pruned, $full_header, $header);
  68     my($from_line, $from_addr);
  69     my($time);
  70
  71     # This will strip the initial form feed, any whitespace that may
  72     # be following it, and then a newline
  73     s/^\s+//;
  74     # This will strip the ^_ off of the end of the message
  75     s/\037$//;
  76
  77     if (! s/(.*)\n//) {
  78       malformatted:
  79         warn "$whoami: message $msg_num in $ARGV is malformatted\n";
  80         next;
  81     }
  82     $labels = $1;
  83
  84     # Strip the integer indicating whether the header is pruned
  85     $labels =~ s/^(\d+)[,\s]*//;
  86     $pruned = $1;
  87
  88     s/(?:((?:.+\n)+)\n*)?\*\*\* EOOH \*\*\*\n+// || goto malformatted;
  89     $full_header = $1;
  90
  91     if (s/((?:.+\n)+)\n+//) {
  92         $header = $1;
  93     }
  94     else {
  95         # Message has no body
  96         $header = $_;
  97         $_ = '';
  98     }
  99
 100     # "$pruned eq '0'" is different from "! $pruned".  We want to make
 101     # sure that we found a valid label line which explicitly indicated
 102     # that the header was not pruned.
 103     if ((! $full_header) || ($pruned eq '0')) {
 104         $full_header = $header;
 105     }
 106
 107     # End message with two newlines (some mbox parsers require a blank
 108     # line before the next "From " line).
 109     s/\s+$/\n\n/;
 110
 111     # Quote "^From "
 112     s/(^|\n)From /$1>From /g;
 113
 114     # Strip extra commas and whitespace from the end
 115     $labels =~ s/[,\s]+$//;
 116     # Now collapse extra commas and whitespace in the remaining label string
 117     $labels =~ s/[,\s]+/, /g;
 118
 119     foreach my $rmail_header qw(summary-line x-coding-system) {
 120         $full_header =~ s/(^|\n)$rmail_header:.*\n/$1/i;
 121     }
 122
 123     if ($full_header =~ s/(^|\n)mail-from:\s*(From .*)\n/$1/i) {
 124         ($from_line = $2) =~ s/\s*$/\n/;
 125     }
 126     else {
 127         foreach my $addr_header qw(return-path from really-from sender) {
 128             if ($full_header =~ /(?:^|\n)$addr_header:\s*(.*\n(?:\B.*\n)*)/i) {
 129                 my($addr) = Mail::Address->parse($1);
 130                 $from_addr = $addr->address($addr);
 131                 last;
 132             }
 133         }
 134
 135         if (! $from_addr) {
 136             $from_addr = "Babyl_to_mail_by_$whoami\@localhost";
 137         }
 138
 139         if ($full_header =~ /(?:^|\n)date:\s*(\S.*\S)/i) {
 140             $time = str2time($1);
 141         }
 142
 143         if (! $time) {
 144             # No Date header or we failed to parse it
 145             $time = time;
 146         }
 147
 148         $from_line = "From " . $from_addr . " " . localtime($time) . "\n";
 149     }
 150
 151     print($from_line, ($opt_full_headers ? $full_header : $header),
 152           ($labels ? "X-Babyl-Labels: $labels\n" : ""), "\n",
 153           $_) || die "$whoami: error writing to stdout: $!\n";
 154 }
 155
 156 close(STDOUT) || die "$whoami: Error closing stdout: $!\n";
 157
 158 # arch-tag: 8c7c8ab0-721c-46d7-ba3e-139801240aa8