Verify content of dist/ folder matches build output

.github/workflows/check-dist.yml

@@ -0,0 +1,53 @@
+# `dist/index.js` is a special file in Actions.
+# When you reference an action with `uses:` in a workflow,
+# `index.js` is the code that will run.
+# For our project, we generate this file through a build process from other source files.
+# We need to make sure the checked-in `index.js` actually matches what we expect it to be.
+name: Check dist/
+
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '**.md'
+  pull_request:
+    paths-ignore:
+      - '**.md'
+  workflow_dispatch:
+
+jobs:
+  check-dist:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set Node.js 16.x
+        uses: actions/setup-node@v3.5.1
+        with:
+          node-version: 16.x
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Rebuild the dist/ directory
+        run: |
+          npm run build
+          npm run package
+
+      - name: Compare the expected and actual dist/ directories
+        run: |
+          if [ "$(git diff --ignore-space-at-eol dist/ | wc -l)" -gt "0" ]; then
+            echo "Detected uncommitted changes after build.  See status below:"
+            git diff
+            exit 1
+          fi
+        id: diff
+
+      # If index.js was different than expected, upload the expected version as an artifact
+      - uses: actions/upload-artifact@v2
+        if: ${{ failure() && steps.diff.conclusion == 'failure' }}
+        with:
+          name: dist
+          path: dist/

package.json

@@ -9,7 +9,7 @@
     "format": "prettier --write **/*.ts",
     "format-check": "prettier --check **/*.ts",
     "lint": "eslint src/**/*.ts",
-    "package": "ncc build --source-map --license licenses.txt",
+    "package": "ncc build --license licenses.txt && eolConverter lf dist/*",
     "test": "jest --ci --reporters=default --reporters=jest-junit",
     "all": "npm run build && npm run format && npm run lint && npm run package && npm test",
     "dart-fixture": "cd \"reports/dart\" && dart test --file-reporter=\"json:../../__tests__/fixtures/dart-json.json\"",
@@ -52,6 +52,7 @@
     "@typescript-eslint/eslint-plugin": "^5.33.1",
     "@typescript-eslint/parser": "^5.33.1",
     "@vercel/ncc": "^0.34.0",
+    "eol-converter-cli": "^1.0.8",
     "eslint": "^8.22.0",
     "eslint-import-resolver-typescript": "^3.4.2",
     "eslint-plugin-github": "^4.1.2",