Try show the baseline diff in the github PR

Author: orta

.github/workflows/test_typescript.yml

@@ -23,5 +23,15 @@ jobs:
           # Move in the generated dom APIs into a new version of TSC
           cp -rf ../generated/* src/lib
 
-          # Run TypeScript's tests with the new DOM libs
-          npm test
+          # Run TypeScript's tests with the new DOM libs, but don't fail
+          npm test || true
+          gulp baseline-accept
+
+          # The git diff now is the difference between tests 
+          git diff > baseline-changes.diff
+
+      - name: Danger
+        run: npm run danger -- ci
+        env: 
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+

dangerfile.js

@@ -0,0 +1,8 @@
+const {message} = require("danger")
+const {readFileSync, existsSync} = require("fs")
+
+const diffPath = "baseline-changes.diff"
+if (existsSync(diffPath)) {
+  const diffContents = readFileSync(diffPath, "utf8")
+  message(diffContents)
+}

package.json

@@ -7,14 +7,16 @@
     "fetch-mdn": "npm run build && node ./lib/mdnfetcher.js",
     "fetch": "echo This could take a few minutes... && npm run fetch-idl && npm run fetch-mdn",
     "baseline-accept": "cpx \"generated\\*\" baselines\\",
-    "test": "tsc -p ./tsconfig.json && node ./lib/index.js && node ./lib/test.js"
+    "test": "tsc -p ./tsconfig.json && node ./lib/index.js && node ./lib/test.js",
+    "danger": "danger"
   },
   "dependencies": {
     "@types/jsdom": "^16.2.4",
     "@types/node": "^14.6.4",
     "@types/node-fetch": "^2.5.7",
     "@types/webidl2": "^23.13.2",
     "cpx2": "^2.0.0",
+    "danger": "^10.5.4",
     "jsdom": "^16.4.0",
     "node-fetch": "^2.6.1",
     "print-diff": "^1.0.0",