add prettier scripts and .prettierignore + workflow check

.github/workflows/ci.yml

@@ -69,6 +69,9 @@ jobs:
       - name: verify doc links
         run: node docs/verify-links.js
 
+      - name: prettier
+        run: yarn prettier:check
+
       - name: lint
         run: yarn lerna -- run lint --since origin/master
 

.prettierignore

@@ -0,0 +1,7 @@
+.yarn
+dist
+microsite/build
+coverage
+*.hbs
+templates
+plugins/scaffolder-backend/sample-templates

package.json

@@ -23,6 +23,7 @@
     "create-plugin": "backstage-cli create-plugin",
     "remove-plugin": "backstage-cli remove-plugin",
     "release": "if [ \"$(git symbolic-ref --short HEAD)\" = master ]; then echo \"don't try to release master\"; exit 1; else lerna version --no-push --force-publish; fi",
+    "prettier:check": "prettier --check .",
     "lerna": "lerna",
     "storybook": "yarn workspace storybook start",
     "build-storybook": "yarn workspace storybook build-storybook"