Test that translation files are compiled

.github/dependabot.yml

@@ -5,3 +5,9 @@ updates:
     directory: "/requirements"
     schedule:
       interval: "daily"
+
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/test.yml

@@ -65,25 +65,16 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
-
-      - name: Get pip cache dir
-        id: pip-cache
-        run: |
-          echo "dir=$(pip cache dir)" >> $GITHUB_OUTPUT
-
-      - name: Cache
-        uses: actions/cache@v3
-        with:
-          path: ${{ steps.pip-cache.outputs.dir }}
-          key:
-            ${{ matrix.python-version }}-v1-${{ hashFiles('**/setup.py') }}-${{ hashFiles('**/tox.ini') }}
-          restore-keys: |
-            ${{ matrix.python-version }}-v1-
+          cache: 'pip'
+          cache-dependency-path: |
+            setup.py
+            tox.ini
+            requirements/*.txt
 
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install -r requirements/tox.txt
+          pip install -r requirements/tox.txt
 
       - name: Tox tests
         run: |
@@ -94,4 +85,37 @@ jobs:
       - name: Upload coverage
         uses: codecov/codecov-action@v3
         with:
-          name: Python ${{ matrix.python-version }}
+          name: Python ${{ matrix.python-version }}, Django ${{ matrix.django-version }}
+
+
+  generated_file_checks:
+    name: Check generated files
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Install gettext
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gettext
+
+      - name: Set up newest stable Python version
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.11
+          cache: 'pip'
+          # Invalidate the cache when this file updates, as the dependencies' versions
+          # are pinned in the step below
+          cache-dependency-path: '.github/workflows/test.yml'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          # Install this project in editable mode, so that its package metadata can be queried
+          pip install -e .
+          # Install the latest minor version of Django we support
+          pip install Django==4.2
+
+      - name: Check translation files are updated
+        run: python -m simple_history.tests.generated_file_checks.check_translations

runtests.py

@@ -97,6 +97,7 @@ def __getitem__(self, item):
         },
     },
 }
+DEFAULT_DATABASE_NAME = "sqlite3"
 
 
 DEFAULT_SETTINGS = dict(  # nosec
@@ -156,16 +157,25 @@ def __getitem__(self, item):
     }
 
 
+def get_default_settings(*, database_name=DEFAULT_DATABASE_NAME):
+    return {
+        **DEFAULT_SETTINGS,
+        "DATABASES": DATABASE_NAME_TO_DATABASE_SETTINGS[database_name],
+    }
+
+
 def main():
     parser = ArgumentParser(description="Run package tests.")
-    parser.add_argument("--database", action="store", nargs="?", default="sqlite3")
+    parser.add_argument(
+        "--database", action="store", nargs="?", default=DEFAULT_DATABASE_NAME
+    )
     parser.add_argument("--failfast", action="store_true")
     parser.add_argument("--pdb", action="store_true")
     parser.add_argument("--tag", action="append", nargs="?")
     namespace = parser.parse_args()
-    db_settings = DATABASE_NAME_TO_DATABASE_SETTINGS[namespace.database]
     if not settings.configured:
-        settings.configure(**DEFAULT_SETTINGS, DATABASES=db_settings)
+        default_settings = get_default_settings(database_name=namespace.database)
+        settings.configure(**default_settings)
 
     django.setup()
 

simple_history/tests/generated_file_checks/check_translations.py

@@ -0,0 +1,71 @@
+import subprocess  # nosec
+import sys
+from glob import glob
+from pathlib import Path
+
+import django
+from django.conf import settings
+from django.core.management import call_command
+
+from runtests import get_default_settings
+
+
+def log(*args, **kwargs):
+    # Flush so that all printed messages appear in the correct order, not matter what
+    # `file` argument is passed (e.g. `sys.stdout` (default) or `sys.stderr`)
+    print(*args, **{"flush": True, **kwargs})
+
+
+def log_err(*args, **kwargs):
+    log(*args, **{"file": sys.stderr, **kwargs})
+
+
+# For some reason, changes in the .po files are often not reflected in the .mo files
+# when running 'compilemessages' - unless the .mo files are deleted first,
+# in which case they seem to be consistently updated
+def delete_mo_files():
+    locale_dir = Path("simple_history/locale")
+    log(
+        f"Deleting the following files inside '{locale_dir}'"
+        f" so that they can be regenerated by 'compilemessages':"
+    )
+    for file_path in glob("**/*.mo", root_dir=locale_dir, recursive=True):
+        log(f"\t{file_path}")
+        (locale_dir / file_path).unlink()
+
+
+# Code based on
+# https://github.com/stefanfoulis/django-phonenumber-field/blob/e653a0972b56d39f1f51fa1f5124b70c2a5549bc/check-translations
+def main():
+    # Delete the .mo files before regenerating them below
+    delete_mo_files()
+
+    log("Running 'compilemessages'...")
+    call_command("compilemessages")
+
+    log("\nRunning 'git status'...")
+    result = subprocess.run(  # nosec
+        ["git", "status", "--porcelain"],
+        check=True,
+        stdout=subprocess.PIPE,
+    )
+    assert result.stderr is None  # nosec
+    stdout = result.stdout.decode()
+    if stdout:
+        log_err(f"Unexpected changes found in the workspace:\n\n{stdout}")
+        if ".mo" in stdout:
+            log_err(
+                "To properly update any '.mo' files,"
+                " try deleting them before running 'compilemessages'."
+            )
+        sys.exit(1)
+    else:
+        # Print the human-readable status to the console
+        subprocess.run(["git", "status"])  # nosec
+
+
+if __name__ == "__main__":
+    if not settings.configured:
+        settings.configure(**get_default_settings())
+    django.setup()
+    main()