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#!/usr/bin/perl -w
=head1 NAME
debconf-escape - helper when working with debconf's escape capability
=head1 SYNOPSIS
debconf-escape -e < unescaped-text
debconf-escape -u < escaped-text
=head1 DESCRIPTION
When debconf has the 'escape' capability set, it will expect commands
you send it to have backslashes and newlines escaped (as C<\\> and C<\n>
respectively) and will in turn escape backslashes and newlines in its
replies. This can be used, for example, to substitute multi-line strings
into templates, or to get multi-line extended descriptions reliably
using C<METAGET>.
=head1 SEE ALSO
L<debconf-devel(7)>
(available in the debconf-doc package)
=cut
use strict;
use Getopt::Long;
use vars qw($escape $unescape);
sub usage {
print STDERR <<EOF;
Usage: debconf-unescape -e|-u < input-text
-e, --escape escape text
-u, --unescape unescape text
Exactly one of -e or -u must be used.
EOF
exit(1);
}
$escape=0;
$unescape=0;
GetOptions(
"escape|e" => \$escape,
"unescape|u" => \$unescape,
) || usage();
if ($escape == $unescape) {
usage();
}
if ($escape) {
while (<>) {
s/\\/\\\\/g;
s/\n/\\n/g;
print;
}
} else {
while (<>) {
for (split /(\\.)/) {
s/\\(.)/$1 eq "n" ? "\n" : $1/eg;
print;
}
}
}
=head1 AUTHOR
Colin Watson <cjwatson@debian.org>
=cut
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