feat(extensions): pass app name to get_app_snippet()

[mr-cal]

• Have you followed the guidelines for contributing?
• Have you signed the CLA?
• Have you successfully run tox run -m lint?
• Have you successfully run tox run -e test-py310? (supported versions: py39, py310, py311, py312)

---

To support #4925, where an extension needs to know the name of the app when creating the app's snippet.

source: https://matrix.to/#/!GGqzbFAUQprdPgYYCM:ubuntu.com/$6GuTjHbBgrKzNoUcc6XKCLLqsy_roBsw4OMDFQIUPY4?via=ubuntu.com&via=matrix.org&via=kde.org

[farshidtz]

Thanks a lot.

Tried on #4925 at it works as expected:

diff --git a/snapcraft/extensions/env_injector.py b/snapcraft/extensions/env_injector.py
index c669fa1f4..cf895075f 100644
--- a/snapcraft/extensions/env_injector.py
+++ b/snapcraft/extensions/env_injector.py
@@ -71,10 +71,12 @@ class EnvInjectorExtension(Extension):
 
     
     @overrides
-    def get_app_snippet(self) -> Dict[str, Any]:
-        """Return the app snippet to apply."""
+    def get_app_snippet(self, *, app_name: str) -> Dict[str, Any]:
         return {
             "command-chain": [ "bin/command-chain/env-exporter"],
+            "environment": {
+                "env_alias": app_name,
+            }
         }
 
     @overrides

[locnnil]

Awesome! This will help a lot! Thank you!

[mr-cal]

Included via #4925