#!/bin/bash
#
# Copyright © 2012 Dr. Tobias Quathamer <toddy@debian.org>
#             2021 Dr. Helge Kreutzmann <debian@helgefjell.de>
#
# 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 3 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, see <http://www.gnu.org/licenses/>.

# Check if there is a .po file without the corresponding
# upstream manpage, e.g. when a package has been removed.

if [ "$1" == "-h" ]; then
  echo "Usage: ./`basename $0` language_code"
  echo This script detects *.po files which have no corresponding upstream man page
  echo in upstream/*/man*. You should consider to move such orphan *.po files
  echo to the archives in po/*/archive. Otherwise, try to find out whether a
  echo corresponding man page exist for the target distribution, and add the
  echo appropriate package to upstream/*/packages.txt.
  echo ""
  echo It is mandatory to submit the language code as parameter.
  echo ""
  echo The language code may be omitted if called from the language directory,
  echo e.g. po/pl
  exit 0
fi

if [ -d man1 ]; then
    lcode=$(basename $(pwd))
elif [ a"$1" != a ]; then
    if [ -d $1 ]; then
        cd $1
        lcode=$1
    else
        echo "Language $3 could not be found, aborting"
        exit 11
    fi
else
    echo "Could not determine target directory, aborting"
    exit 12
fi


# Determine directory names from upstream directory.
distributions=$(find ../../upstream -maxdepth 1 -type d | cut -d/ -f4- | LC_ALL=C sort)

# path to the upstream manpages
upstreamdir="../../upstream"

translations=$(find man* -name "*.po" | LC_ALL=C sort)
for translation in $translations; do
	found_upstream="no"
	# Find the manpage by removing the .po extension
	manpage=$(basename $translation .po)
	mandir=$(dirname $translation)
	for distribution in $distributions; do
		upstream_manpage="$upstreamdir/$distribution/$mandir/$manpage"
		if [ -f "$upstream_manpage" ]; then
			found_upstream="yes"
			break
		fi
	done
	if [ $found_upstream = "no" ]; then
		echo "No upstream found for '$translation'"
	fi
done