chore: mark gnome-extension experimental for core24 (#4736)

gnome-extension will be experimental in core24 until support for
streamlined graphics support is finalized.

See https://forum.snapcraft.io/t/39718

Signed-off-by: Callahan Kovacs <callahan.kovacs@canonical.com>

snapcraft/extensions/gnome.py

@@ -82,6 +82,11 @@ def get_supported_confinement() -> Tuple[str, ...]:
     @staticmethod
     @overrides
     def is_experimental(base: Optional[str]) -> bool:
+        # core24 is experimental until streamlined graphics support is finalized
+        # see https://forum.snapcraft.io/t/39718
+        if base == "core24":
+            return True
+
         return False
 
     @overrides

snapcraft/services/provider.py

@@ -30,3 +30,9 @@ def setup(self) -> None:
             self.environment["SNAPCRAFT_BUILD_INFO"] = build_info
         if image_info := os.getenv("SNAPCRAFT_IMAGE_INFO"):
             self.environment["SNAPCRAFT_IMAGE_INFO"] = image_info
+        if experimental_extensions := os.getenv(
+            "SNAPCRAFT_ENABLE_EXPERIMENTAL_EXTENSIONS"
+        ):
+            self.environment["SNAPCRAFT_ENABLE_EXPERIMENTAL_EXTENSIONS"] = (
+                experimental_extensions
+            )

tests/spread/core24/linters-pack/task.yaml

@@ -9,6 +9,8 @@ environment:
   SNAP/library_ignored_mixed: library-ignored-mixed
   SNAP/library_missing: library-missing
   SNAP/library_unused: library-unused
+  # gnome-extension core24 is experimental
+  SNAPCRAFT_ENABLE_EXPERIMENTAL_EXTENSIONS: "1"
 
 restore: |
   cd "${SNAP}"

tests/unit/extensions/test_gnome.py

@@ -68,9 +68,15 @@ def test_get_supported_confinement():
     assert gnome.GNOME.get_supported_confinement() == ("strict", "devmode")
 
 
-@pytest.mark.parametrize("base", ["core22", "core24"])
-def test_is_experimental(base):
-    assert gnome.GNOME.is_experimental(base=base) is False
+@pytest.mark.parametrize(
+    ("base", "is_experimental"),
+    [
+        ("core22", False),
+        ("core24", True),
+    ],
+)
+def test_is_experimental(base, is_experimental):
+    assert gnome.GNOME.is_experimental(base=base) is is_experimental
 
 
 def test_get_app_snippet(gnome_extension):

tests/unit/services/test_provider.py

@@ -20,6 +20,11 @@
 def test_provider(provider_service, monkeypatch):
     monkeypatch.setenv("SNAPCRAFT_BUILD_INFO", "foo")
     monkeypatch.setenv("SNAPCRAFT_IMAGE_INFO", "bar")
+    monkeypatch.setenv("SNAPCRAFT_ENABLE_EXPERIMENTAL_EXTENSIONS", "baz")
     provider_service.setup()
     assert provider_service.environment["SNAPCRAFT_BUILD_INFO"] == "foo"
     assert provider_service.environment["SNAPCRAFT_IMAGE_INFO"] == "bar"
+    assert (
+        provider_service.environment["SNAPCRAFT_ENABLE_EXPERIMENTAL_EXTENSIONS"]
+        == "baz"
+    )