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#!/usr/bin/perl -w
# Intended to be used as a restricted command.
# Usage:
# command="/path/to/dgit-mirror-ssh-wrap /srv/repos/ .git --"
# or similar. The two substantive arguments are literals.
# The example permits writes to directories
# /srv/repos/$PACKAGE.git
# where $PACKAGE has the syntax of a Debian package name.
use strict;
die 'bad usage' unless @ARGV==3 && $ARGV[2] eq '--';
our ($prefix, $suffix) = @ARGV;
$prefix =~ s/\W/\\$&/g;
$suffix =~ s/\W/\\$&/g;
my $package = qr{[0-9a-z][-+.0-9a-z]*};
my $d = qr{$prefix$package$suffix};
my $command = $ENV{SSH_ORIGINAL_COMMAND}
// die "missing SSH_ORIGINAL_COMMAND";
#print STDERR ">$d<\n";
$_ = $command;
m{^rsync --server -lHtre\.iLsfxC --timeout=\d+ --delete --safe-links \. $d$}
||
m{^rsync --server -lHtre\.iLsfxCIv --timeout=\d+ --delete --safe-links \. $d$}
||
m{^rsync --server -lHtre\.iLsfxCIvu --timeout=\d+ --delete --safe-links \. $d$}
# To add a new command pattern, add || m{^ ... $} above.
# The pattern should contain $d where the per-package destination
# directory would go.
or die "dgit-mirror-ssh-wrap: unexpected command (rsync upgraded?):
$command\n";
exec $& or die $!;
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