update GHA to auto merge/close update pr

.github/workflows/updates.yaml

@@ -36,36 +36,58 @@ jobs:
 
       - name: Track or create branch
         run: |
-          if [ "$branch_exists" = "true" ]; then
+          if [ "${{ env.branch_exists }}" = "true" ]; then
             git fetch origin dependency-update:dependency-update
             git checkout dependency-update
           else
             git checkout -b dependency-update
           fi
 
       - name: Update dependencies
+        id: update-deps
         run: |
           scala-cli --power dependency-update branch --all
           git config --global user.name "Mark Rudolph"
           git config --global user.email "mark@k8ty.app"
-          git commit -am "Update dependencies" && echo "changes_exists=true" >> $GITHUB_ENV || echo "No changes to commit" && echo "changes_exists=false" >> $GITHUB_ENV
+          if git commit -am "Update dependencies"; then
+            echo "changes_exists=true" >> $GITHUB_ENV
+          else
+            echo "changes_exists=false" >> $GITHUB_ENV
+          fi
 
       - name: Push changes
+        if: env.changes_exists == 'true'
         run: |
           git push -u origin dependency-update
 
       - name: Create a Pull Request
+        if: env.changes_exists == 'true'
         run: |
           gh pr create \
             --title "Dependency Updates" \
             --body "Dependency updates from scala-cli" \
             --head dependency-update \
             --base main || echo "Pull request already exists or no changes to push"
 
-      - name: Trigger PR Tests
+      - uses: docker/setup-buildx-action@v3
+      - name: PR Tests
+        if: env.changes_exists == 'true'
         run: |
-          if [ "$changes_exists" = "true" ]; then
-            gh workflow run pr-tests.yaml  || echo "Error running PR tests"
+          gh pr comment --body "Running PR tests..."
+          if scala-cli --power test branch; then
+            echo "tests_passed=true" >> $GITHUB_ENV
           else
-            echo "No changes; not running PR tests"
-          fi
+            echo "tests_passed=true" >> $GITHUB_ENV
+          fi
+
+      - name: Merge PR
+        if: env.tests_passed == 'true'
+        run: |
+          gh pr comment --body "PR tests passed! Auto merging..."
+          gh pr merge --squash --delete-branch --body "Auto-merged dependency updates"
+
+      - name: Close PR
+        if: env.tests_passed == 'false'
+        run: |
+          gh pr comment --body "PR tests failed :cry: Closing PR..."
+          gh pr close --delete-branch --body "PR tests failed"