Merge from gnus--devo--0
[emacs.git] / lib-src / b2m.pl
blob5fc76d2672067eae64dc971009eaa8dd75a6da33
1 #!/usr/bin/perl
3 # b2m.pl - Script to convert a Babyl file to an mbox file
5 # Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
6 # Free Software Foundation, Inc.
8 # Maintainer: Jonathan Kamens <jik@kamens.brookline.ma.us>
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.
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.
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/>.
24 # Requires CPAN modules: MailTools (for Mail::Address), TimeDate (for
25 # Date::Parse).
27 use warnings;
28 use strict;
29 use File::Basename;
30 use Getopt::Long;
31 use Mail::Address;
32 use Date::Parse;
34 my($whoami) = basename $0;
35 my($version) = '$Revision$';
36 my($usage) = "Usage: $whoami [--help] [--version] [--[no]full-headers] [Babyl-file]
37 \tBy default, full headers are printed.\n";
39 my($opt_help, $opt_version);
40 my($opt_full_headers) = 1;
42 die $usage if (! GetOptions(
43 'help' => \$opt_help,
44 'version' => \$opt_version,
45 'full-headers!' => \$opt_full_headers,
46 ));
48 if ($opt_help) {
49 print $usage;
50 exit;
52 elsif ($opt_version) {
53 print "$whoami version: $version\n";
54 exit;
57 die $usage if (@ARGV > 1);
59 $/ = "\n\037";
61 if (<> !~ /^BABYL OPTIONS:/) {
62 die "$whoami: $ARGV is not a Babyl file\n$usage";
65 while (<>) {
66 my($msg_num) = $. - 1;
67 my($labels, $pruned, $full_header, $header);
68 my($from_line, $from_addr);
69 my($time);
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$//;
77 if (! s/(.*)\n//) {
78 malformatted:
79 warn "$whoami: message $msg_num in $ARGV is malformatted\n";
80 next;
82 $labels = $1;
84 # Strip the integer indicating whether the header is pruned
85 $labels =~ s/^(\d+)[,\s]*//;
86 $pruned = $1;
88 s/(?:((?:.+\n)+)\n*)?\*\*\* EOOH \*\*\*\n+// || goto malformatted;
89 $full_header = $1;
91 if (s/((?:.+\n)+)\n+//) {
92 $header = $1;
94 else {
95 # Message has no body
96 $header = $_;
97 $_ = '';
100 # "$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 = $header;
107 # End message with two newlines (some mbox parsers require a blank
108 # line before the next "From " line).
109 s/\s+$/\n\n/;
111 # Quote "^From "
112 s/(^|\n)From /$1>From /g;
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;
119 foreach my $rmail_header qw(summary-line x-coding-system) {
120 $full_header =~ s/(^|\n)$rmail_header:.*\n/$1/i;
123 if ($full_header =~ s/(^|\n)mail-from:\s*(From .*)\n/$1/i) {
124 ($from_line = $2) =~ s/\s*$/\n/;
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;
135 if (! $from_addr) {
136 $from_addr = "Babyl_to_mail_by_$whoami\@localhost";
139 if ($full_header =~ /(?:^|\n)date:\s*(\S.*\S)/i) {
140 $time = str2time($1);
143 if (! $time) {
144 # No Date header or we failed to parse it
145 $time = time;
148 $from_line = "From " . $from_addr . " " . localtime($time) . "\n";
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: $!\n";
156 close(STDOUT) || die "$whoami: Error closing stdout: $!\n";
158 # arch-tag: 8c7c8ab0-721c-46d7-ba3e-139801240aa8