#!/bin/sh

### LICENSE
# === This file is part of Calamares - <https://calamares.io> ===
#
#   SPDX-FileCopyrightText: 2015-2016 Teo Mrnjavac <teo@kde.org>
#   SPDX-FileCopyrightText: 2017-2020 Adriaan de Groot <groot@kde.org>
#   SPDX-License-Identifier: BSD-2-Clause
#
#   This file is Free Software: you can redistribute it and/or modify
#   it under the terms of the 2-clause BSD License.
#
### END LICENSE

### USAGE
#
# Fetch the Transifex translations for Calamares and incorporate them
# into the source tree, adding commits of the different files.
#
# Run this (occasionally) at the top-level directory to get
# new translations. See also CMakeLists.txt and ci/txstats.py
# for update instructions.
#
### END USAGE

### SANITY CHECKING
#
# The script needs a .tx/config to talk to the Transifex server;
# it also checks that it is run from the top-level of a Calamares
# checkout. In order to use the system overall, you'll also need:
#  - ~/.gitconfig (For the git commits this does)
#  - ~/.transifexrc (Password token for Transifex)
#  - ~/.ssh (For git commits)
#
test -f "CMakeLists.txt" || { echo "! Not at Calamares top-level" ; exit 1 ; }
test -f ".tx/config" || { echo "! Not at Calamares top-level" ; exit 1 ; }
test -f "calamares.desktop" || { echo "! Not at Calamares top-level" ; exit 1 ; }


### FIND EXECUTABLES
#
#
XMLLINT=""
for _xmllint in xmllint
do
	$_xmllint --version > /dev/null 2>&1 && XMLLINT=$_xmllint
	test -n "$XMLLINT" && break
done
# XMLLINT is optional


### FETCH TRANSLATIONS
#
# Use Transifex client to get translations; this depends on the
# .tx/config file to locate files, and overwrites them in the
# filesystem with new (merged) translations.
export QT_SELECT=5
transifex-client pull --force --all || exit 1


### CLEANUP TRANSLATIONS
#
# Some languages have been deprecated. They may still exist in Transifex,
# so clean them up after pulling.
#
drop_language() {
	rm -rf lang/python/"$1" lang/calamares_"$1".ts
	grep -v "\\[$1]" calamares.desktop > calamares.desktop.new
	mv calamares.desktop.new calamares.desktop
}

# Also fix the .desktop file, which has some fields removed by Transifex.
#
{ cat calamares.desktop.in ; grep "\\[[a-zA-Z_@]*]=" calamares.desktop ; } > calamares.desktop.new
mv calamares.desktop.new calamares.desktop

# And fixup the XML files like in txpush.sh
if test -n "$XMLLINT" ; then
	for TS_FILE in lang/calamares_*.ts
	do
		$XMLLINT --c14n11 "$TS_FILE" | { echo "<!DOCTYPE TS>" ; cat - ; } | $XMLLINT --format --encode utf-8 -o "$TS_FILE".new - && mv "$TS_FILE".new "$TS_FILE"
	done
fi


### COMMIT TRANSLATIONS
#
# Produce multiple commits (for the various parts of the i18n
# infrastructure used by Calamares) of the updated translations.
# Try to be a little smart about not committing trivial changes.

# Who is credited with these CI commits
AUTHOR="--author='Calamares CI <groot@kde.org>'"
# Message to put after the module name
BOILERPLATE="Automatic merge of Transifex translations"

git add --verbose lang/calamares*.ts
git commit "$AUTHOR" --message="i18n: [calamares] $BOILERPLATE" | true

rm -f lang/desktop*.desktop
awk '
	BEGIN {skip=0;}
	/^# Translations/ {skip=1;}
	{if (!skip || (length($0)>1 && $0 != "# Translations")) {
		skip=0; print $0;
	}}' < calamares.desktop > calamares.desktop.new
mv calamares.desktop.new calamares.desktop
# Now group translated key-names (Name, Icon, Description, ..) by sorted
# language key rather than random-ish language-key order (which shuffles
# entries around).
#
# First, the non-translated lines
grep -v '\[.*\]=' calamares.desktop  > calamares.desktop.new
# The translated lines:
# - replace (the first) [] by | so we have a consistent field separator
# - sort based on field 2, then 1 (language code, then reversed key-name)
# - replace the first | by [, the first (remaining) | by ]
# Effectively this puts the fields in this order: Name, Icon, Generic Name,
# Comment -- within each language key. This keeps churn down since the
# language codes and key-names are constant.
grep '\[.*\]=' calamares.desktop | sed -e 's/\[/|/' -e 's/\]/|/' | sort -t '|' -k 2,2 -k 1,1r | sed -e 's/|/\[/' | sed -e 's/|/\]/' >> calamares.desktop.new
mv calamares.desktop.new calamares.desktop
git add --verbose calamares.desktop
git commit "$AUTHOR" --message="i18n: [desktop] $BOILERPLATE" | true

# Transifex updates the PO-Created timestamp also when nothing interesting
# has happened, so drop the files which have just 1 line changed (the
# PO-Created line). This applies only to modules which use po-files.
git diff --numstat src/modules | awk '($1==1 && $2==1){print $3}' | xargs git checkout --

# sed either wants -i'' (GNU sed) or -i '' (BSD sed) to
# replace in a file, with no backup extension. Define
# a `reinplace` command to deal with the difference.
if test FreeBSD = `uname` ; then
	reinplace() { 
		sed -i '' "$@"
	}
else
	reinplace() { 
		sed -i'' "$@"
	}
fi

# Go through the Python modules; those with a lang/ subdir have their
# own complete gettext-based setup.
for MODULE_DIR in $(find src/modules -maxdepth 1 -mindepth 1 -type d) ; do
	FILES=$(find "$MODULE_DIR" -name "*.py" -a -type f)
	if test -n "$FILES" ; then
		MODULE_NAME=$(basename ${MODULE_DIR})
		if [ -d ${MODULE_DIR}/lang ]; then
			# Convert PO files to MO files
			for POFILE in $(find ${MODULE_DIR} -name "*.po") ; do
				reinplace '/^"Content-Type/s/CHARSET/UTF-8/' $POFILE
				# msgfmt -o ${POFILE%.po}.mo $POFILE
			done
			git add --verbose ${MODULE_DIR}/lang/*
			git commit "$AUTHOR" --message="i18n: [${MODULE_NAME}] $BOILERPLATE" | true
		fi
	fi
done

for POFILE in $(find lang -name "python.po") ; do
	reinplace '/^"Content-Type/s/CHARSET/UTF-8/' $POFILE
	# msgfmt -o ${POFILE%.po}.mo $POFILE
done
git add --verbose lang/python*
git commit "$AUTHOR" --message="i18n: [python] $BOILERPLATE" | true
