#!/bin/bash

# This script updates the specified .po file according to the specified .pot
# file, which could be changed due to the changes in the source code.
# The old version of the .po file is preserved and is named '[filename].po.old'.
#
# Options:
# -r - do not preserve the old .po file
# -f - remove all entries marked as "fuzzy"

PROGNAME="$(basename "$0")"

preserve_old_po='1'
remove_fuzzy='0'

if [ "$1" == '-r' ]; then
   preserve_old_po='0'
   shift
fi

if [ "$1" == '-f' ]; then
   remove_fuzzy='1'
   shift
fi

if [ ! -f "$1" ]; then
   echo "$PROGNAME: '$1': .po file not found" 1>&2
   exit 1
fi
po_file="$1"
shift

if [ ! -f "$1" ]; then
   echo "$PROGNAME: '$1': .pot file not found" 1>&2
   exit 1
fi
pot_file="$1"
shift


if [ "$preserve_old_po" == '1' ]; then
   mv -f "$po_file" "$po_file"'.old'
   msgmerge "$po_file"'.old' "$pot_file" --output-file="$po_file"
else
   msgmerge "$po_file" "$pot_file" --output-file="$po_file"
fi

if [ "$remove_fuzzy" == '1' ]; then
  msgattrib --clear-fuzzy --no-obsolete --empty -o "$po_file" "$po_file"
fi