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|
#!/usr/bin/perl
# b2m.pl - Script to convert a Babyl file to an mbox file
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA.
# Maintained by Jonathan Kamens <jik@kamens.brookline.ma.us>.
# Requires CPAN modules: MailTools (for Mail::Address), TimeDate (for
# Date::Parse).
use warnings;
use strict;
use File::Basename;
use Getopt::Long;
use Mail::Address;
use Date::Parse;
my($whoami) = basename $0;
my($version) = '$Revision: 1.4 $';
my($usage) = "Usage: $whoami [--help] [--version] [--[no]full-headers] [Babyl-file]
\tBy default, full headers are printed.\n";
my($opt_help, $opt_version);
my($opt_full_headers) = 1;
die $usage if (! GetOptions(
'help' => \$opt_help,
'version' => \$opt_version,
'full-headers!' => \$opt_full_headers,
));
if ($opt_help) {
print $usage;
exit;
}
elsif ($opt_version) {
print "$whoami version: $version\n";
exit;
}
die $usage if (@ARGV > 1);
$/ = "\n\037";
if (<> !~ /^BABYL OPTIONS:/) {
die "$whoami: $ARGV is not a Babyl file\n$usage";
}
while (<>) {
my($msg_num) = $. - 1;
my($labels, $pruned, $full_header, $header);
my($from_line, $from_addr);
my($time);
# This will strip the initial form feed, any whitespace that may
# be following it, and then a newline
s/^\s+//;
# This will strip the ^_ off of the end of the message
s/\037$//;
if (! s/(.*)\n//) {
malformatted:
warn "$whoami: message $msg_num in $ARGV is malformatted\n";
next;
}
$labels = $1;
# Strip the integer indicating whether the header is pruned
$labels =~ s/^(\d+)[,\s]*//;
$pruned = $1;
s/(?:((?:.+\n)+)\n*)?\*\*\* EOOH \*\*\*\n+// || goto malformatted;
$full_header = $1;
if (s/((?:.+\n)+)\n+//) {
$header = $1;
}
else {
# Message has no body
$header = $_;
$_ = '';
}
# "$pruned eq '0'" is different from "! $pruned". We want to make
# sure that we found a valid label line which explicitly indicated
# that the header was not pruned.
if ((! $full_header) || ($pruned eq '0')) {
$full_header = $header;
}
# End message with two newlines (some mbox parsers require a blank
# line before the next "From " line).
s/\s+$/\n\n/;
# Quote "^From "
s/(^|\n)From /$1>From /g;
# Strip extra commas and whitespace from the end
$labels =~ s/[,\s]+$//;
# Now collapse extra commas and whitespace in the remaining label string
$labels =~ s/[,\s]+/, /g;
foreach my $rmail_header qw(summary-line x-coding-system) {
$full_header =~ s/(^|\n)$rmail_header:.*\n/$1/i;
}
if ($full_header =~ s/(^|\n)mail-from:\s*(From .*)\n/$1/i) {
($from_line = $2) =~ s/\s*$/\n/;
}
else {
foreach my $addr_header qw(return-path from really-from sender) {
if ($full_header =~ /(?:^|\n)$addr_header:\s*(.*\n(?:\B.*\n)*)/i) {
my($addr) = Mail::Address->parse($1);
$from_addr = $addr->address($addr);
last;
}
}
if (! $from_addr) {
$from_addr = "Babyl_to_mail_by_$whoami\@localhost";
}
if ($full_header =~ /(?:^|\n)date:\s*(\S.*\S)/i) {
$time = str2time($1);
}
if (! $time) {
# No Date header or we failed to parse it
$time = time;
}
$from_line = "From " . $from_addr . " " . localtime($time) . "\n";
}
print($from_line, ($opt_full_headers ? $full_header : $header),
($labels ? "X-Babyl-Labels: $labels\n" : ""), "\n",
$_) || die "$whoami: error writing to stdout: $!\n";
}
close(STDOUT) || die "$whoami: Error closing stdout: $!\n";
|
