#!/bin/sh
set -e

# update-perl-sax-parsers of libxml-sax-perl creates a file with a random order of its lines
# A bug report with patch is available at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993444
# This script duplicates that patch

# Don't run if libxml-sax-perl is not installed
if [ ! -e /usr/bin/update-perl-sax-parsers ];
then
  exit 0
fi

# If Debian.pm already contains a sort line, there is no need to patch the file
if grep -q sort /usr/share/perl5/XML/SAX/Debian.pm;
then
  exit 0
fi

# Patch the Perl script
sed -i -e '/foreach my $key/s/keys/sort keys/' /usr/share/perl5/XML/SAX/Debian.pm

# Regenerate the file that has more than one key-value pair
update-perl-sax-parsers --remove XML::SAX::Expat
update-perl-sax-parsers --add XML::SAX::Expat --priority 50
update-perl-sax-parsers --update

echo "P: $(basename $0) Reproducible hook has been applied"