Make GitHub Actions check translation files (#534)

* validate_po.py: Fix typo "varialbes"

* validate_po.py: Exit with code 1 on error

* validate_po.py: Process locales in alphabetical order

* validate_po.py: Report on progress

* Make GitHub Actions check translation files

.github/workflows/translations.yml

@@ -0,0 +1,31 @@
+name: Check translations
+
+# Drop permissions to minimum for security
+permissions:
+  contents: read
+
+on:
+  pull_request:
+  push:
+  workflow_dispatch:
+
+jobs:
+  check_translations:
+    name: Check translations
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.11
+
+      - name: Install runtime dependencies
+        run: |
+          python3 -m pip install --upgrade pip setuptools wheel
+          python3 -m pip install polib
+
+      - name: Check translations
+        run: |
+          python3 validate_po.py

validate_po.py

@@ -19,17 +19,24 @@
 
 import os
 import polib
+import sys
 
-def validate_po(locale, path):
+def validate_po(locale: str, path: str) -> bool:
+     success = True
      po = polib.pofile(path)
      for entry in po:
          if entry.msgstr and (entry.msgid.count("%") != entry.msgstr.count("%")):
-             print("Number of varialbes mismatched in " + locale)
+             print("Number of variables mismatched in " + locale)
              print(entry.msgid + " -> " + entry.msgstr)
              print()
+             success = False
+     return success
 
+success = True
 locales = os.listdir('safeeyes/config/locale')
-for locale in locales:
+for locale in sorted(locales):
     path = os.path.join('safeeyes/config/locale', locale, "LC_MESSAGES/safeeyes.po")
     if os.path.isfile(path):
-        validate_po(locale, path)
+        print('Validating translation %s...' % path)
+        success = validate_po(locale, path) and success
+sys.exit(0 if success else 1)