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[emacs.git] / lib-src / b2m.pl
blob225c272587fe27fc2beff011da2341331194bbcf
1 #!/usr/bin/perl
3 # b2m.pl - Script to convert a Babyl file to an mbox file
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
18 # USA.
20 # Maintained by Jonathan Kamens <jik@kamens.brookline.ma.us>.
22 # Requires CPAN modules: MailTools (for Mail::Address), TimeDate (for
23 # Date::Parse).
25 use warnings;
26 use strict;
27 use File::Basename;
28 use Getopt::Long;
29 use Mail::Address;
30 use Date::Parse;
32 my($whoami) = basename $0;
33 my($version) = '$Revision$';
34 my($usage) = "Usage: $whoami [--help] [--version] [--[no]full-headers] [Babyl-file]
35 \tBy default, full headers are printed.\n";
37 my($opt_help, $opt_version);
38 my($opt_full_headers) = 1;
40 die $usage if (! GetOptions(
41 'help' => \$opt_help,
42 'version' => \$opt_version,
43 'full-headers!' => \$opt_full_headers,
44 ));
46 if ($opt_help) {
47 print $usage;
48 exit;
50 elsif ($opt_version) {
51 print "$whoami version: $version\n";
52 exit;
55 die $usage if (@ARGV > 1);
57 $/ = "\n\037";
59 if (<> !~ /^BABYL OPTIONS:/) {
60 die "$whoami: $ARGV is not a Babyl file\n$usage";
63 while (<>) {
64 my($msg_num) = $. - 1;
65 my($labels, $pruned, $full_header, $header);
66 my($from_line, $from_addr);
67 my($time);
69 # This will strip the initial form feed, any whitespace that may
70 # be following it, and then a newline
71 s/^\s+//;
72 # This will strip the ^_ off of the end of the message
73 s/\037$//;
75 if (! s/(.*)\n//) {
76 malformatted:
77 warn "$whoami: message $msg_num in $ARGV is malformatted\n";
78 next;
80 $labels = $1;
82 # Strip the integer indicating whether the header is pruned
83 $labels =~ s/^(\d+)[,\s]*//;
84 $pruned = $1;
86 s/(?:((?:.+\n)+)\n*)?\*\*\* EOOH \*\*\*\n+// || goto malformatted;
87 $full_header = $1;
89 if (s/((?:.+\n)+)\n+//) {
90 $header = $1;
92 else {
93 # Message has no body
94 $header = $_;
95 $_ = '';
98 # "$pruned eq '0'" is different from "! $pruned". We want to make
99 # sure that we found a valid label line which explicitly indicated
100 # that the header was not pruned.
101 if ((! $full_header) || ($pruned eq '0')) {
102 $full_header = $header;
105 # End message with two newlines (some mbox parsers require a blank
106 # line before the next "From " line).
107 s/\s+$/\n\n/;
109 # Quote "^From "
110 s/(^|\n)From /$1>From /g;
112 # Strip extra commas and whitespace from the end
113 $labels =~ s/[,\s]+$//;
114 # Now collapse extra commas and whitespace in the remaining label string
115 $labels =~ s/[,\s]+/, /g;
117 foreach my $rmail_header qw(summary-line x-coding-system) {
118 $full_header =~ s/(^|\n)$rmail_header:.*\n/$1/i;
121 if ($full_header =~ s/(^|\n)mail-from:\s*(From .*)\n/$1/i) {
122 ($from_line = $2) =~ s/\s*$/\n/;
124 else {
125 foreach my $addr_header qw(return-path from really-from sender) {
126 if ($full_header =~ /(?:^|\n)$addr_header:\s*(.*\n(?:\B.*\n)*)/i) {
127 my($addr) = Mail::Address->parse($1);
128 $from_addr = $addr->address($addr);
129 last;
133 if (! $from_addr) {
134 $from_addr = "Babyl_to_mail_by_$whoami\@localhost";
137 if ($full_header =~ /(?:^|\n)date:\s*(\S.*\S)/i) {
138 $time = str2time($1);
141 if (! $time) {
142 # No Date header or we failed to parse it
143 $time = time;
146 $from_line = "From " . $from_addr . " " . localtime($time) . "\n";
149 print($from_line, ($opt_full_headers ? $full_header : $header),
150 ($labels ? "X-Babyl-Labels: $labels\n" : ""), "\n",
151 $_) || die "$whoami: error writing to stdout: $!\n";
154 close(STDOUT) || die "$whoami: Error closing stdout: $!\n";
156 # arch-tag: 8c7c8ab0-721c-46d7-ba3e-139801240aa8