Add treeshake check

.github/workflows/treeshake.yml

@@ -0,0 +1,80 @@
+name: Check tree-shakeability
+on: [ pull_request ]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    concurrency: ci-treeshake-${{ github.ref }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 16
+
+      - name: Installing dependencies
+        run: npm ci
+
+      - name: Build artifacts
+        run: npm run build
+
+      - name: Run agadoo
+        id: agadoo
+        run: |
+          # Run Agadoo and store the output for further usage
+          # We store the process stdout and stderr to tmp files
+          STDOUT_F=$(mktemp)
+          STDERR_F=$(mktemp)
+          # Run agadoo and capture errors without breaking the workflow
+          $(npx agadoo 2> $STDERR_F > $STDOUT_F) && true
+          # Infer the result from the first word of the last line
+          RET="$(cat $STDERR_F | tail -1 | cut -d' ' -f 1)"
+          # In order to be used in GH actions `echo "::set-output` the
+          # multi-line output must be escaped.
+          STDOUT="$(cat $STDOUT_F)"
+          STDOUT="${STDOUT//'%'/%25}"
+          STDOUT="${STDOUT//$'\n'/%0A}"
+          STDOUT="${STDOUT//$'\r'/%0D}"
+          STDERR="$(cat $STDERR_F)"
+          STDERR="${STDERR//'%'/%25}"
+          STDERR="${STDERR//$'\n'/%0A}"
+          STDERR="${STDERR//$'\r'/%0D}"
+          echo "::set-output name=stdout::$STDOUT"
+          echo "::set-output name=stderr::$STDERR"
+          if [[ $RET == 'Success!' ]]; then
+            echo "::set-output name=status::tree-shakeable"
+          else
+            echo "::set-output name=status::not tree-shakeable"
+          fi
+          echo "$STDOUT"
+          echo ""
+          echo "$STDERR"
+          # Clean-up
+          rm $STDOUT_F
+          rm $STDERR_F
+          exit 0
+      - name: comment PR
+        uses: unsplash/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          msg: |
+            **Check tree-shakeability** for ${{ github.sha }}: ${{ steps.agadoo.outputs.status == 'tree-shakeable' && ':deciduous_tree:' || ':x:' }} ${{ steps.agadoo.outputs.status }}
+            <details>
+              <summary>Agadoo stdout</summary>
+              ```javascript
+              ${{ steps.agadoo.outputs.stdout }}
+              ```
+            </details>
+            <details>
+              <summary>Agadoo stderr</summary>
+              ```javascript
+              ${{ steps.agadoo.outputs.stderr }}
+              ```
+            </details>
+          check_for_duplicate_msg: false
+          delete_prev_regex_msg: ^\*\*Check tree-shakeability\*\*
+      - name: Fail if cannot tree-shake
+        if: ${{ steps.agadoo.outputs.status == 'not tree-shakeable' }}
+        run: exit 1