rewrite of i18n-gen.sh

no need to manually generate po/pot files anymore
generation of pot files and updating po files now before translating

i18n-gen.sh

@@ -1,19 +1,97 @@
-#!/bin/sh
+#!/bin/bash
-#
-# To create a new language pack XX
-# > mkdir -p ./i18n/XX/LC_MESSAGES/
-# > msginit --input=./i18n/glances.pot --output=./i18n/XX/LC_MESSAGES/glances.po
-# Translate using the ./i18n/XX/LC_MESSAGES/glances.po file
-# Then add XX to the LANG_LIST
-# Run this script
-#
 
-LANG_LIST='es fr it pt_BR zh_CN de'
+ROOT="${0%%i18n-gen.sh}"
 
-xgettext --language=Python --keyword=_ --output=./i18n/glances.pot ./glances/glances.py
+function usage() {
+        cat <<EOT
+Usage: $0 <subcommand> language_code
 
-for i in $LANG_LIST; do
+Available subcommands:
-   echo "Generate language pack for: $i"
+    init
-   msgmerge --update --no-fuzzy-matching --backup=off ./i18n/$i/LC_MESSAGES/glances.po ./i18n/glances.pot
+            creates a new folder for a new language
-   msgfmt ./i18n/$i/LC_MESSAGES/glances.po --output-file ./i18n/$i/LC_MESSAGES/glances.mo
+    update
-done
+            updates an existing language file with new Strings from the sources
+    gen
+            generates the parsed language file
+
+update and gen also accept the wildcard language_code ALL
+
+Suggested Workflows (with XX as language_code):
+    New Language
+        1. $0 init XX
+        2. translation of ${ROOT}i18n/XX/LC_MESSAGES/glances.po
+        3. $0 gen XX
+    Update Language
+        1. $0 update XX
+        2. update translations of ${ROOT}i18n/XX/LC_MESSAGES/glances.po
+        3. $0 gen XX
+EOT
+exit
+}
+
+function gen_pot() {
+	xgettext --language=Python --keyword=_ --output=${ROOT}i18n/glances.pot ${ROOT}glances/glances.py
+}
+
+OPERATION="$1"
+shift
+
+if [ -z "$1" ]; then
+	usage
+fi
+
+case "$OPERATION" in
+	init)
+		if [ -f "${ROOT}i18n/$1/LC_MESSAGES/glances.po" ]; then
+			echo "Error:"
+			echo "Language file for language $1 already exists"
+			echo "Please run \"$0 help\" for more information"
+			exit 1
+		fi
+		mkdir -p ${ROOT}i18n/$1/LC_MESSAGES/
+		gen_pot
+		msginit --input=${ROOT}i18n/glances.pot --output=${ROOT}i18n/XX/LC_MESSAGES/glances.po
+		echo "${ROOT}i18n/XX/LC_MESSAGES/glances.po successful created"
+		exit 0
+		;;
+	update)
+		if [ "$1" = "ALL" ]; then
+			LANG_LIST="$(ls -d ${ROOT}i18n/*/ | awk -F / '{print $(NF-1)}')"
+		else
+			if [ ! -f "${ROOT}i18n/$1/LC_MESSAGES/glances.po" ]; then
+				echo "Error:"
+				echo "Language file for language $1 doesn't exists"
+				echo "Please run \"$0 help\" for more information"
+				exit 1
+			fi
+			LANG_LIST="$1"
+		fi
+		gen_pot
+		for i in $LANG_LIST; do
+			msgmerge --update --no-fuzzy-matching --backup=off ${ROOT}i18n/$i/LC_MESSAGES/glances.po ${ROOT}i18n/glances.pot
+			echo "Language file for language $i updated"
+		done
+		exit 0
+		;;
+	gen)
+		if [ "$1" = "ALL" ]; then
+			LANG_LIST="$(ls -d ${ROOT}i18n/*/ | awk -F / '{print $(NF-1)}')"
+		else
+			if [ ! -f "${ROOT}i18n/$1/LC_MESSAGES/glances.po" ]; then
+				echo "Error:"
+				echo "Language file for language $1 doesn't exists"
+				echo "Please run \"$0 help\" for more information"
+				exit 1
+			fi
+			LANG_LIST="$1"
+		fi
+		for i in $LANG_LIST; do
+			msgfmt ${ROOT}i18n/$i/LC_MESSAGES/glances.po --output-file ${ROOT}i18n/$i/LC_MESSAGES/glances.mo
+			echo "Compiled language file for language $i generated"
+		done
+		exit 0
+		;;
+	*)
+		usage
+		;;
+esac