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160 lines
4.2 KiB
Perl
160 lines
4.2 KiB
Perl
#!/usr/bin/perl
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# b2m.pl - Script to convert a Babyl file to an mbox file
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# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
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# Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; see the file COPYING. If not, write to the
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# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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# Boston, MA 02110-1301 USA.
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# Maintained by Jonathan Kamens <jik@kamens.brookline.ma.us>.
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# Requires CPAN modules: MailTools (for Mail::Address), TimeDate (for
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# Date::Parse).
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use warnings;
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use strict;
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use File::Basename;
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use Getopt::Long;
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use Mail::Address;
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use Date::Parse;
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my($whoami) = basename $0;
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my($version) = '$Revision$';
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my($usage) = "Usage: $whoami [--help] [--version] [--[no]full-headers] [Babyl-file]
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\tBy default, full headers are printed.\n";
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my($opt_help, $opt_version);
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my($opt_full_headers) = 1;
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die $usage if (! GetOptions(
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'help' => \$opt_help,
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'version' => \$opt_version,
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'full-headers!' => \$opt_full_headers,
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));
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if ($opt_help) {
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print $usage;
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exit;
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}
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elsif ($opt_version) {
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print "$whoami version: $version\n";
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exit;
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}
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die $usage if (@ARGV > 1);
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$/ = "\n\037";
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if (<> !~ /^BABYL OPTIONS:/) {
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die "$whoami: $ARGV is not a Babyl file\n$usage";
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}
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while (<>) {
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my($msg_num) = $. - 1;
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my($labels, $pruned, $full_header, $header);
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my($from_line, $from_addr);
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my($time);
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# This will strip the initial form feed, any whitespace that may
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# be following it, and then a newline
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s/^\s+//;
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# This will strip the ^_ off of the end of the message
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s/\037$//;
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if (! s/(.*)\n//) {
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malformatted:
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warn "$whoami: message $msg_num in $ARGV is malformatted\n";
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next;
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}
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$labels = $1;
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# Strip the integer indicating whether the header is pruned
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$labels =~ s/^(\d+)[,\s]*//;
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$pruned = $1;
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s/(?:((?:.+\n)+)\n*)?\*\*\* EOOH \*\*\*\n+// || goto malformatted;
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$full_header = $1;
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if (s/((?:.+\n)+)\n+//) {
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$header = $1;
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}
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else {
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# Message has no body
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$header = $_;
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$_ = '';
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}
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# "$pruned eq '0'" is different from "! $pruned". We want to make
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# sure that we found a valid label line which explicitly indicated
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# that the header was not pruned.
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if ((! $full_header) || ($pruned eq '0')) {
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$full_header = $header;
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}
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# End message with two newlines (some mbox parsers require a blank
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# line before the next "From " line).
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s/\s+$/\n\n/;
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# Quote "^From "
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s/(^|\n)From /$1>From /g;
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# Strip extra commas and whitespace from the end
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$labels =~ s/[,\s]+$//;
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# Now collapse extra commas and whitespace in the remaining label string
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$labels =~ s/[,\s]+/, /g;
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foreach my $rmail_header qw(summary-line x-coding-system) {
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$full_header =~ s/(^|\n)$rmail_header:.*\n/$1/i;
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}
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if ($full_header =~ s/(^|\n)mail-from:\s*(From .*)\n/$1/i) {
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($from_line = $2) =~ s/\s*$/\n/;
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}
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else {
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foreach my $addr_header qw(return-path from really-from sender) {
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if ($full_header =~ /(?:^|\n)$addr_header:\s*(.*\n(?:\B.*\n)*)/i) {
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my($addr) = Mail::Address->parse($1);
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$from_addr = $addr->address($addr);
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last;
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}
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}
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if (! $from_addr) {
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$from_addr = "Babyl_to_mail_by_$whoami\@localhost";
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}
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if ($full_header =~ /(?:^|\n)date:\s*(\S.*\S)/i) {
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$time = str2time($1);
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}
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if (! $time) {
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# No Date header or we failed to parse it
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$time = time;
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}
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$from_line = "From " . $from_addr . " " . localtime($time) . "\n";
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}
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print($from_line, ($opt_full_headers ? $full_header : $header),
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($labels ? "X-Babyl-Labels: $labels\n" : ""), "\n",
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$_) || die "$whoami: error writing to stdout: $!\n";
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}
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close(STDOUT) || die "$whoami: Error closing stdout: $!\n";
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# arch-tag: 8c7c8ab0-721c-46d7-ba3e-139801240aa8
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