ci: compare coverage

Author: ggazzo

.github/workflows/ci.yml

@@ -14,20 +14,47 @@ on:
 
 name: my-workflow
 jobs:
+  base_branch_cov:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.base_ref }}
+      - uses: oven-sh/setup-bun@v2
+
+      - run: bun install
+      - run: bun test:coverage
+          
+
+      - name: Upload code coverage for ref branch
+        uses: actions/upload-artifact@v3
+        with:
+          name: ref-lcov.info
+          path: ./coverage/lcov.info
+
   unit-tests:
     name: Code Quality Checks(lint, test, tsc)
     runs-on: ubuntu-latest
+    needs: base_branch_cov
     steps:
       # ...
       - uses: actions/checkout@v4
       - uses: oven-sh/setup-bun@v2
 
-      # run any `bun` or `bunx` command
       - run: bun install
       - run: bun lint
       - run: bun tsc
       - run: bun test:coverage
+      - name: Download code coverage report from base branch
+        uses: actions/download-artifact@v3
+        with:
+          name: ref-lcov.info
       - uses: barecheck/code-coverage-action@v1.0.0 
         with:
           barecheck-github-app-token: ${{ secrets.BARECHECK_GITHUB_APP_TOKEN }}
+          lcov-file: "./coverage/lcov.info"
+          base-lcov-file: "./lcov.info"
+          minimum-ratio: 0 # Fails Github action once code coverage is decreasing
+          send-summary-comment: true
+          show-annotations: "warning" # Possible options warning|error