#!/bin/sh
# This script is meant to provide some means to copy over strings from one
# textdomain to another. It copies the relevant messages from SRCDOMAIN to
# DSTDOMAIN for LANG. If no specific languages are specified, all langs in the
# LINGUAS file for the DSTDOMAIN are used.
#
# Known limitations:
# * The tool as to be run from the root checkout dir after the string is
#   available in the new textdomain.
# * Support for merging strings with plurals is likely to not exist.
#
# Required programs (should all come with the gettext package):
# * msgattrib
# * msgcat
# * msgfmt
# * msgmerge
set -e

# where we find the distribution po hierarchy
BASEDIR=po

# copy relevant messages from SRCDOMAIN to DSTDOMAIN, for LANG

if [ $# -lt 2 ]
then
    echo "Usage: $0 src-domain dst-domain [lang ...]"
    exit 1
fi

SRCDOMAIN=$1
DSTDOMAIN=$2
shift
shift

if [ $# = 0 ]
then
    set -- `cat $BASEDIR/$SRCDOMAIN/LINGUAS`
fi

echo "Running utils/po2po"
echo "Source domain:      "$SRCDOMAIN
echo "Destination domain: "$DSTDOMAIN
echo "Languages:          "$@
echo ""

tmp=`mktemp`
for LANG in "$@"
do
    echo "Current language: "$LANG
    # merge the 2 files
    msgcat --use-first -F $BASEDIR/$DSTDOMAIN/$LANG.po $BASEDIR/$SRCDOMAIN/$LANG.po >$tmp
    mv $BASEDIR/$DSTDOMAIN/$LANG.po $BASEDIR/$DSTDOMAIN/$LANG.po.bak
    mv $tmp $BASEDIR/$DSTDOMAIN/$LANG.po

    # sync with DST pot
    msgmerge --backup=none -U $BASEDIR/$DSTDOMAIN/$LANG.po $BASEDIR/$DSTDOMAIN/$DSTDOMAIN.pot

    # clear those obsolete strings added by SRC, but keep ours if any
    msgattrib --no-obsolete $BASEDIR/$DSTDOMAIN/$LANG.po >$tmp
    msgcat --use-first -F $tmp $BASEDIR/$DSTDOMAIN/$LANG.po.bak > $BASEDIR/$DSTDOMAIN/$LANG.po

    msgmerge --backup=none -U $BASEDIR/$DSTDOMAIN/$LANG.po $BASEDIR/$DSTDOMAIN/$DSTDOMAIN.pot

    msgfmt --output-file=/dev/null --statistics $BASEDIR/$DSTDOMAIN/$LANG.po

done
rm $tmp