Add support for missing action runners

Turns out that Windows Server 2019 does not support locale names
specified in the format defined by the POSIX standard. This patch
converts the POSIX format to the one supported by Windows 2019.

In addition to that, this patch adds all supported action runners to
the continue integration, so we can make sure that this action works
properly on every supported platform.

Reported-by: Irena Rindos
Fixes: #25

Author: ikalnytskyi

.github/workflows/ci.yml

@@ -14,18 +14,25 @@ jobs:
     strategy:
       matrix:
         os:
-          - ubuntu-latest
-          - windows-latest
-          - macos-latest
-          - macos-13
+          - ubuntu-22.04
+          - ubuntu-20.04
+          - windows-2022
+          - windows-2019
           - macos-14
+          - macos-13
+          - macos-12
     steps:
       - uses: actions/checkout@v4
 
       - name: Run setup-postgres
         uses: ./
         id: postgres
 
+      - name: Run setup-python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+
       - name: Run tests
         run: |
           python3 -m pip install --upgrade pip pytest psycopg furl
@@ -57,6 +64,11 @@ jobs:
           port: 34837
         id: postgres
 
+      - name: Run setup-python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+
       - name: Run tests
         run: |
           python3 -m pip install --upgrade pip pytest psycopg furl

action.yml

@@ -64,6 +64,18 @@ runs:
         export PGDATA="$RUNNER_TEMP/pgdata"
         export PWFILE="$RUNNER_TEMP/pwfile"
 
+        DEFAULT_ENCODING="UTF-8"
+        DEFAULT_LOCALE="en_US.$DEFAULT_ENCODING"
+
+        # Unfortunately, Windows Server 2019 doesn't understand locale
+        # specified in the format defined by the POSIX standard, i.e.
+        # <language>_<country>.<encoding>. Therefore, we have to convert it
+        # into something it can swallow, i.e. <language>-<country>.
+        if [[ "$RUNNER_OS" == "Windows" && "$(wmic os get Caption)" == *"2019"* ]]; then
+          DEFAULT_LOCALE="${DEFAULT_LOCALE%%.*}"
+          DEFAULT_LOCALE="${DEFAULT_LOCALE//_/-}"
+        fi
+
         # Unfortunately 'initdb' could only receive a password via file on disk
         # or prompt to enter on. Prompting is not an option since we're running
         # in non-interactive mode.
@@ -82,8 +94,8 @@ runs:
           --username="${{ inputs.username }}" \
           --pwfile="$PWFILE" \
           --auth="scram-sha-256" \
-          --encoding="UTF-8" \
-          --locale="en_US.UTF-8" \
+          --encoding="$DEFAULT_ENCODING" \
+          --locale="$DEFAULT_LOCALE" \
           --no-instructions
 
         # Do not create unix sockets since they are created by default in the

test_action.py

@@ -12,6 +12,24 @@
 ConnectionFactory = t.Callable[[str], psycopg.Connection]
 
 
+@pytest.fixture(scope="function")
+def is_windows() -> bool:
+    """Returns True if running on Windows."""
+
+    return os.name == "nt"
+
+
+@pytest.fixture(scope="function")
+def is_windows_server_2019(is_windows: bool) -> bool:
+    """Returns True if running on Windows Server 2019."""
+
+    if not is_windows:
+        return False
+
+    windows_caption = subprocess.check_output(["wmic", "os", "get", "Caption"], text=True)
+    return "Windows Server 2019" in windows_caption
+
+
 @pytest.fixture(scope="function")
 def connection_uri() -> str:
     """Read and return connection URI from environment."""
@@ -57,35 +75,40 @@ def connection(
     raise RuntimeError("f{request.param}: unknown value")
 
 
-def test_connection_uri(connection_uri):
+def test_connection_uri(connection_uri: str):
     """Test that CONNECTION_URI matches EXPECTED_CONNECTION_URI."""
 
     assert connection_uri == os.getenv("EXPECTED_CONNECTION_URI")
 
 
-def test_service_name(service_name):
+def test_service_name(service_name: str):
     """Test that SERVICE_NAME matches EXPECTED_SERVICE_NAME."""
 
     assert service_name == os.getenv("EXPECTED_SERVICE_NAME")
 
 
 def test_server_encoding(connection: psycopg.Connection):
-    """Test that PostgreSQL's encoding is 'UTF-8'."""
+    """Test that PostgreSQL's encoding matches the one we passed to initdb."""
 
     assert connection.execute("SHOW SERVER_ENCODING").fetchone()[0] == "UTF8"
 
 
-def test_locale(connection: psycopg.Connection):
-    """Test that PostgreSQL's locale is 'en_US.UTF-8'."""
+def test_locale(connection: psycopg.Connection, is_windows_server_2019: bool):
+    """Test that PostgreSQL's locale matches the one we paased to initdb."""
+
+    locale_exp = "en_US.UTF-8"
+
+    if is_windows_server_2019:
+        locale_exp = "en-US"
 
     lc_collate = connection.execute("SHOW LC_COLLATE").fetchone()[0]
     lc_ctype = connection.execute("SHOW LC_CTYPE").fetchone()[0]
 
-    assert locale.normalize(lc_collate) == "en_US.UTF-8"
-    assert locale.normalize(lc_ctype) == "en_US.UTF-8"
+    assert locale.normalize(lc_collate) == locale_exp
+    assert locale.normalize(lc_ctype) == locale_exp
 
 
-def test_environment_variables():
+def test_environment_variables(is_windows: bool):
     """Test that only expected 'PG*' variables are set."""
 
     pg_environ = {k: v for k, v in os.environ.items() if k.startswith("PG")}
@@ -96,7 +119,7 @@ def test_environment_variables():
     pg_servicefile_exp = pathlib.Path(os.environ["RUNNER_TEMP"], "pgdata", "pg_service.conf")
     assert pg_servicefile.resolve() == pg_servicefile_exp.resolve()
 
-    if os.name == "nt":
+    if is_windows:
         pg_environ_exp = {
             "PGBIN": "",
             "PGDATA": "",