set ref for PR

.github/workflows/validate.yml

@@ -80,14 +80,8 @@ jobs:
         uses: actions/[email protected]
 
       - name: Build Container
-        uses: docker/[email protected]
-        with:
-          context: .
-          file: action/Dockerfile
-          push: false
-          tags: hacs/action:local
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+        run: |
+          docker build . -t hacs/action:local -f action/Dockerfile
 
       - name: Run Action
         run: |

action/action.py

@@ -112,6 +112,8 @@ async def preflight():
         if REPOSITORY and CATEGORY:
             repository = REPOSITORY
             category = CATEGORY
+            if event_data.get("pull_request") is not None:
+                ref = event_data["pull_request"]["head"]["ref"]
         elif GITHUB_REPOSITORY == HacsGitHubRepo.DEFAULT:
             category = choose_category()
             repository = await choose_repository(hacs.githubapi, category)