A hacky little hook to make sure pushed tags contain _tmpl

update-hook.pl

#!/usr/bin/env perl
use strict;
use warnings FATAL => "all";

# --- Command line
my $refname = $ARGV[0];
my $oldrev  = $ARGV[1];
my $newrev  = $ARGV[2];

# --- Safety check
unless ($ENV{GIT_DIR}) {
    print STDERR "Don't run this script from the command line.";
    print STDERR " (if you want, you could supply GIT_DIR then run";
    print STDERR "  $0 <ref> <oldrev> <newrev>)";
    exit 1;
}

if (!length $refname or !length $oldrev or !length $newrev) {
    print STDERR "Usage: $0 <ref> <oldrev> <newrev>";
    exit 1;
}

print STDERR "refname = $refname\n" if $ENV{DEBUG};
print STDERR "oldrev = $oldrev\n" if $ENV{DEBUG};
print STDERR "newrev = $newrev\n" if $ENV{DEBUG};

if ($refname =~ m[^refs/tags/(.*)]) {
    my $tagname = $1;

    if ($tagname !~ /_tmpl/) {
        print STDERR "You are not allowed to push a tag that doesn't contain _tmpl to template.git\n";
        exit 1;
    }
}

# --- Finished
exit 0;