Github Actions: Perform selective eslint & testing for PRs (#9506)

.github/workflows/test.yml

@@ -21,12 +21,45 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'npm'
+        
     - run: npm ci
-    - run: npm run full-test
+    
+    - name: Determine which files to lint (if pull request)
+      if: ${{ github.event_name == 'pull_request' }}
+      id: changed-files
+      uses: tj-actions/changed-files@v35
+      with:
+        files: |
+          **/*.js
+          **/*.ts
+          **/*.tsx
+
+    - name: Determine whether test/sim or test/random-battles need to run (if pull request)
+      if: ${{ github.event_name == 'pull_request' }}
+      id: changed-directories
+      uses: tj-actions/changed-files@v35
+      with:
+        files: |
+          config/formats.ts
+          data/**
+          sim/**
+
+    - name: Run selective lint & neccessary tests (if pull request)
+      if: ${{ github.event_name == 'pull_request' }}
+      run: npm run full-test-ci
+      env:
+        CI: true
+        FILES: ${{ steps.changed-files.outputs.all_changed_and_modified_files }}
+        SKIPSIMTESTS: ${{ steps.changed-directories.outputs.all_changed_and_modified_files == '' }}
+
+    - name: Run full lint & test (if push to master)
+      run: npm run full-test
+      if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
       env:
         CI: true

package.json

@@ -40,6 +40,7 @@
     "test": "mocha",
     "posttest": "npm run tsc",
     "full-test": "npm run lint && npm run tsc && mocha --timeout 8000 --forbid-only -g \".*\"",
+    "full-test-ci": "eslint ${FILES} --max-warnings 0 && npm run tsc && (([ \"$SKIPSIMTESTS\" = true ] && mocha --timeout 8000 --forbid-only -g \".*\" --exclude \"test/{sim,random-battles}/**\") || mocha --timeout 8000 --forbid-only -g \".*\")",
     "postinstall": "npm run build postinstall"
   },
   "bin": "./pokemon-showdown",