Replace checksum-phar with a simple job in phar.yml

Author: ondrejmirtes

.github/workflows/checksum-phar.yml

@@ -23,6 +23,7 @@ jobs:
 
     outputs:
       checksum: ${{ steps.checksum.outputs.md5 }}
+      changes: ${{ steps.changes.outputs }}
 
     steps:
       - name: "Checkout"
@@ -107,6 +108,15 @@ jobs:
       - name: "Delete checksum PHAR"
         run: "rm tmp/phpstan.phar"
 
+      - uses: dorny/paths-filter@v3
+        id: changes
+        with:
+          filters: |
+            compiler:
+              - 'compiler/**'
+              - '.github/workflows/phar.yml'
+              - '.github/scripts/**'
+
   integration-tests:
     if: github.event_name == 'pull_request'
     needs: compiler-tests
@@ -131,6 +141,72 @@ jobs:
       ref: 2.1.x
       phar-checksum: ${{needs.compiler-tests.outputs.checksum}}
 
+  checksum-phar:
+    if: github.event_name == 'pull_request' && needs.compiler-tests.outputs.changes.compiler == 'true'
+    needs: compiler-tests
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Get base commit SHA
+        id: base
+        run: echo "base_sha=${{ github.event.pull_request.base.sha }}" >> "$GITHUB_OUTPUT"
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Install dependencies
+        working-directory: .github/scripts
+        run: npm ci
+
+      - name: "Compile TS scripts"
+        working-directory: .github/scripts
+        run: npx tsc
+
+      - name: Find phar-file-checksum from base commit
+        id: find-artifact
+        uses: actions/github-script@v7
+        env:
+          BASE_SHA: ${{ steps.base.outputs.base_sha }}
+          ARTIFACT_NAME: phar-file-checksum
+          WORKFLOW_NAME: Compile PHAR
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          script: |
+            const script = require('./.github/scripts/dist/find-artifact.js');
+            await script({github, context, core})
+
+      - name: Download old artifact by ID
+        uses: actions/download-artifact@v4
+        with:
+          artifact-ids: ${{ steps.find-artifact.outputs.artifact_id }}
+          run-id: ${{ steps.find-artifact.outputs.run_id }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          path: ./phar-file-checksum-old.phar
+
+      - name: "Save old checksum"
+        id: "old_checksum"
+        run: echo "md5=$(md5sum phar-file-checksum-old.phar | cut -d' ' -f1)" >> $GITHUB_OUTPUT
+
+      - name: Download new artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: phar-file-checksum
+          path: ./phar-file-checksum-new.phar
+
+      - name: "Save new checksum"
+        id: "new_checksum"
+        run: echo "md5=$(md5sum phar-file-checksum-new.phar | cut -d' ' -f1)" >> $GITHUB_OUTPUT
+
+      - name: "Assert checksum"
+        run: |
+          old_checksum=${{ steps.old_checksum.outputs.md5 }}
+          new_checksum=${{ steps.new_checksum.outputs.md5 }}
+          [[ "$old_checksum" == "$new_checksum" ]];
+
+
   commit:
     name: "Commit PHAR"
     if: "github.repository_owner == 'phpstan' && (github.ref == 'refs/heads/2.1.x' || startsWith(github.ref, 'refs/tags/'))"