Add automatic Prettier GitHub action

.github/workflows/prettier.yml

@@ -0,0 +1,39 @@
+name: Prettier
+
+# This action works with pull requests and pushes
+on:
+  - push
+
+jobs:
+  prettier:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          # Make sure the actual branch is checked out when running on pull requests
+          ref: ${{ github.head_ref }}
+
+      # Make sure @sourcegraph/prettierrc is installed
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+          cache: yarn
+        run: yarn
+
+      - name: Read package.json
+        id: read_package_json
+        run: |
+          JSON=$(cat package.json)
+          echo "::set-output name=packageJson::${JSON//'%'/'%25'}"
+
+      - name: Prettier
+        uses: creyD/prettier_action@v3.3
+        with:
+          # Take prettier version from package.json to stay in sync and support upgrades through Renovate
+          prettier_version: ${{fromJson(steps.read_package_json.outputs.packageJson).devDependencies.prettier}}
+          prettier_options: --write '**/*.{js,css,scss,ts,tsx,md,html,yml,yaml,json}'
+          commit_message: Prettier
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -1,7 +1,6 @@
 .DS_Store
-yarn.lock
 .yarn-integrity
+node_modules
 docs/server/config/site.md
 .idea
 /.bin/
-.vscode/settings.json

.prettierignore

@@ -0,0 +1,14 @@
+website/.cache/
+website/public/
+
+# Prettier chokes on Go template syntax
+_resources/templates/
+
+# Old blog content
+blogposts/201?/
+blogposts/2020/
+blogposts/liveblogs/dotgo/
+blogposts/liveblogs/github-universe/
+blogposts/liveblogs/gophercon/
+blogposts/liveblogs/graphql-summit/
+blogposts/liveblogs/strange-loop/

.vscode/extensions.json

@@ -0,0 +1,3 @@
+{
+  "recommendations": ["esbenp.prettier-vscode", "EditorConfig.EditorConfig"],
+}

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+  "editor.formatOnSave": true,
+}

package.json

@@ -0,0 +1,11 @@
+{
+  "private": true,
+  "scripts": {
+    "prettier": "prettier --write '**/*.{js,css,scss,ts,tsx,md,html,yml,yaml,json}' --list-different",
+    "prettier-check": "yarn run prettier --write=false"
+  },
+  "devDependencies": {
+    "@sourcegraph/prettierrc": "^3.0.3",
+    "prettier": "^2.3.2"
+  }
+}

prettier.config.js

@@ -1 +1 @@
-module.exports = require('./website/node_modules/@sourcegraph/prettierrc')
+module.exports = require('@sourcegraph/prettierrc')

website/package.json

@@ -61,13 +61,10 @@
     "test": "echo \"Error: no test specified\" && exit 1",
     "lint": "eslint .",
     "stylelint": "stylelint --quiet 'src/**/*.scss'",
-    "prettier": "prettier '**/*.{js?(on),ts?(x),md}' --write --list-different",
-    "prettier-check": "yarn run prettier --write=false",
     "deploy": "yarn run build && firebase deploy"
   },
   "devDependencies": {
     "@sourcegraph/eslint-config": "^0.25.1",
-    "@sourcegraph/prettierrc": "^3.0.3",
     "@sourcegraph/stylelint-config": "^1.3.0",
     "@sourcegraph/tsconfig": "^4.0.1",
     "@types/bootstrap": "5.0.15",
@@ -79,7 +76,6 @@
     "eslint": "7.32.0",
     "eslint-webpack-plugin": "^3.0.1",
     "gatsby-cli": "^2.19.1",
-    "prettier": "^2.3.2",
     "slugify": "^1.5.3",
     "stylelint": "^13.13.1",
     "stylelint-scss": "^3.20.1",

website/yarn.lock

@@ -12255,7 +12255,7 @@ prepend-http@^2.0.0:
   resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-2.0.0.tgz#e92434bfa5ea8c19f41cdfd401d741a3c819d897"
   integrity sha1-6SQ0v6XqjBn0HN/UAddBo8gZ2Jc=
 
-prettier@^2.0.5, prettier@^2.3.2:
+prettier@^2.0.5:
   version "2.3.2"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.3.2.tgz#ef280a05ec253712e486233db5c6f23441e7342d"
   integrity sha512-lnJzDfJ66zkMy58OL5/NY5zp70S7Nz6KqcKkXYzn2tMVrNxvbqaBpg7H3qHaLxCJ5lNMsGuM8+ohS7cZrthdLQ==

yarn.lock

@@ -0,0 +1,13 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"@sourcegraph/prettierrc@^3.0.3":
+  version "3.0.3"
+  resolved "https://registry.npmjs.org/@sourcegraph/prettierrc/-/prettierrc-3.0.3.tgz#51bfa9b2588fe35121593fa877143e6373028289"
+  integrity sha512-FQ1/Ued4I02R0JkrHHofDN163juVxUnPALzfxPZrDZUHv+c3jHjfZhmTHEz+Wd+g3b7MFk0fkj36nZSnvPyU8A==
+
+prettier@^2.3.2:
+  version "2.3.2"
+  resolved "https://registry.npmjs.org/prettier/-/prettier-2.3.2.tgz#ef280a05ec253712e486233db5c6f23441e7342d"
+  integrity sha512-lnJzDfJ66zkMy58OL5/NY5zp70S7Nz6KqcKkXYzn2tMVrNxvbqaBpg7H3qHaLxCJ5lNMsGuM8+ohS7cZrthdLQ==