Add script that handles i18n operations

init, extract and update can be done for all plugins at once

babel-js.cfg

@@ -0,0 +1,7 @@
+[javascript: static/**.js]
+encoding = utf-8
+domain = messages-js
+
+[javascript: templates/**.html]
+encoding = utf-8
+domain = messages-js

babel.cfg

@@ -0,0 +1,10 @@
+[python: **.py]
+encoding = utf-8
+
+[jinja2: templates/**.txt]
+encoding = utf-8
+extensions = jinja2.ext.autoescape, jinja2.ext.with_
+
+[jinja2: templates/**.html]
+encoding = utf-8
+extensions = jinja2.ext.autoescape, jinja2.ext.with_

manage-i18n.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+USAGE="$0 [init <locale>|extract|update <locale>|compile <locale>]"
+
+if [[ "$1" == '-h' || "$1" == '--help' ]]; then
+    echo "$USAGE"
+    exit 0
+fi
+
+ACTION="$1"
+LOCALE="$2"
+
+function require_locale {
+    if [[ -z "$LOCALE" ]]; then
+        echo "$USAGE"
+        exit 1
+    fi
+}
+
+if [[ ! "init extract update compile" =~ $ACTION ]]; then
+    echo "$USAGE"
+    exit 1
+fi
+
+for plugin in $(find . -name setup.py -exec sh -c 'basename $(dirname $0)' {} \;); do
+    pushd "${plugin}" >/dev/null
+    if [[ "$ACTION" == "init" ]]; then
+        require_locale
+        pybabel init -l "$LOCALE" -i "./indico_${plugin}/translations/messages.pot" -d "./indico_${plugin}/translations/"
+    elif [[ "$ACTION" == "extract" ]]; then
+        TRANSLATIONS_DIR="./indico_${plugin}/translations"
+        pybabel extract -o "${TRANSLATIONS_DIR}/messages.pot" "indico_${plugin}" -F ../babel.cfg
+        pybabel extract -o "${TRANSLATIONS_DIR}/messages-js.pot" "indico_${plugin}" -k 'gettext' -k 'ngettext' -k '$T' -F ../babel-js.cfg
+    elif [[ "$ACTION" == "update" ]]; then
+        require_locale
+        pybabel update -i "./indico_${plugin}/translations/messages.pot" -l "$LOCALE" -d "./indico_${plugin}/translations"
+    fi
+    popd >/dev/null
+done