Add linters

Author: sethvargo

.github/workflows/integration.yml

@@ -41,7 +41,7 @@ jobs:
         name: 'Set up Node'
         uses: 'actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a' # ratchet:actions/setup-node@v4
         with:
-          node-version: '20.x'
+          node-version-file: 'package.json'
 
       - id: 'build'
         name: 'Build'

.github/workflows/unit.yml

@@ -16,6 +16,9 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  lint:
+    uses: 'google-github-actions/.github/.github/workflows/lint.yml@sethvargo/lint' # ratchet:exclude
+
   unit:
     strategy:
       fail-fast: false
@@ -31,15 +34,16 @@ jobs:
 
       - uses: 'actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a' # ratchet:actions/setup-node@v4
         with:
-          node-version: '20.x'
+          node-version-file: 'package.json'
 
       - name: 'npm build'
         run: 'npm ci && npm run build'
 
       - name: 'npm lint'
         # There's no need to run the linter for each operating system, since it
         # will find the same thing 3x and clog up the PR review.
-        if: ${{ matrix.os == 'ubuntu-latest' }}
+        if: |-
+          ${{ matrix.os == 'ubuntu-latest' }}
         run: 'npm run lint'
 
       - name: 'npm test'

package.json

@@ -10,6 +10,10 @@
     "test": "node --require ts-node/register --test-reporter spec --test ./tests/unit/main.test.ts ./tests/unit/output-parser.test.ts",
     "e2e-tests": "node --require ts-node/register --test-reporter spec --test ./tests/e2e.test.ts"
   },
+  "engines": {
+    "node": "20.x",
+    "npm": "10.x"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/google-github-actions/create-cloud-deploy-release.git"