build: add translations validation to CI

.github/workflows/ci.yml

@@ -30,11 +30,14 @@ jobs:
     - name: Install Required System Packages
       run: |
         sudo apt-get update
-        sudo apt-get install -y libxmlsec1-dev ubuntu-restricted-extras xvfb libxml2-dev libxslt-dev python3-dev libevent-dev python3-pip python3-venv libgtk2.0-0 libxt6
+        sudo apt-get install -y libxmlsec1-dev ubuntu-restricted-extras xvfb libxml2-dev libxslt-dev python3-dev libevent-dev python3-pip python3-venv gettext libgtk2.0-0 libxt6
 
     - name: Install Dependencies
       run: make requirements
 
+    - name: Check if translations are up-to-date
+      run: make check_translations_up_to_date
+
     - name: Run quality checks
       run: make test.quality
 

Makefile

@@ -53,6 +53,8 @@ pull_translations: ## pull translations from transifex
 push_translations: ## push translations to transifex
 	tx push -s
 
+check_translations_up_to_date: extract_translations compile_translations dummy_translations detect_changed_source_translations ## extract, compile, and check if translation files are up-to-date
+
 install_firefox:
 	mkdir -p test_helpers
 	cd test_helpers && wget "https://ftp.mozilla.org/pub/firefox/releases/43.0/linux-x86_64/en-US/firefox-43.0.tar.bz2" && tar -xjf firefox-43.0.tar.bz2