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#! /bin/sh

set -e

LANG=C
svndir="$1"
usage () {
    printf "Usage: %s [svndir]\n" "$0"
}

if ! [ -d debian ]; then
    printf "Cannot find debian directory\n" 1>&2
    exit 2
fi

CURVERSION=$(dpkg-parsechangelog | sed -n -e "s/^Version: //p")
I18NFILES="
@LANG@.po
admin-@LANG@.po
admin-network-@LANG@.po
continents-cities-@LANG@.po
twentysixteen/@LANG@.po
twentyseventeen/@LANG@.po
twentynineteen/@LANG@.po
"

find_latest_version() {
    local dir="$1"
    local latest=""
    while [ $# -gt 0 ] && shift; do
	if dpkg --compare-versions "$1" gt "$CURVERSION"; then
	    continue
	fi
	if [ ! -d $dir/$1/messages ]; then
	    continue
	fi
	pofiles=$(cd "$dir/$1/messages"; ls *.po 2>/dev/null) || true
	if [ -z "$pofiles" ]; then
	    continue # Skip dir without po files
	fi
	if dpkg --compare-versions "$latest" lt "$1"; then
	    latest="$1"
	fi
    done
    echo $latest
}

do_install() {
    local srcdir="$1"
    local lang="$2"
    for f in $I18NFILES; do
	f=$(echo "$f" | sed -e "s/@LANG@/$lang/")
	if [ -e "$srcdir/$f" ]; then
	    echo -n "$f "
	    cp "$srcdir/$f" debian/languages/$f
	fi
    done
}

#UPSTREAM_I18N_SVN=http://svn.automattic.com/wordpress-i18n
UPSTREAM_I18N_SVN=http://i18n.svn.wordpress.org/
BASEDIR="${PWD}"

if [ -d "$svndir" ]; then
    (cd $svndir; svn update --ignore-externals)
else
    tmpcodir=$(mktemp -d -t get-upstream-i18n.XXXXXX)
    (cd $tmpcodir; svn co --ignore-externals $UPSTREAM_I18N_SVN svn)
    svndir="$tmpcodir/svn"
fi

LANGS=$(cd $svndir; ls | egrep -v "^(theme|tools|COPYING|pot)")

for f in $I18NFILES; do
    mkdir -p debian/languages/$(dirname $f)
done

for lang in $LANGS; do
    [ -d "$svndir/$lang/tags" ] || continue
    allver=$(cd "$svndir/$lang/tags"; ls | egrep "^[0-9]" || true)
    [ -n "$allver" ] || continue
    latest=$(find_latest_version "$svndir/$lang/tags" $allver)
    if [ ! -n "$latest" ]; then
	echo "No suitable version found for $lang, skipping."
	continue
    fi
    echo -n "Updating i18n files for $lang from $latest: "
    do_install "$svndir/$lang/tags/$latest/messages/" "$lang"
    echo ""
done

[ -z "$tmpcodir" ] || rm -rf "$tmpcodir"