Cache eslint cache in CI

.github/workflows/ci.yml

@@ -30,6 +30,16 @@ jobs:
       with:
         path: node_modules
         key: ${{ runner.os }}-${{ hashFiles('package.json', 'yarn.lock', 'patches/**') }}
+
+    - name: Restore cached .eslintcache and tsconfig.tsbuildinfo
+      uses: actions/cache/restore@v3
+      id: cache-lint
+      with:
+        path: |
+          .eslintcache
+          tsconfig.tsbuildinfo
+        key: lint-${{ runner.os }}-${{ hashFiles('package.json', 'yarn.lock', 'patches/**', '.eslintrc.js', '.eslint/**', 'tsconfig.json') }}
+
     - name: Install Desktop node_modules
       if: steps.cache-desktop-modules.outputs.cache-hit != 'true'
       run: yarn install --frozen-lockfile
@@ -42,6 +52,15 @@ jobs:
     - run: yarn lint-license-comments
     - run: git diff --exit-code
 
+    - name: Update cached .eslintcache and tsconfig.tsbuildinfo
+      uses: actions/cache/save@v3
+      if: github.ref == 'refs/heads/main'
+      with:
+        path: |
+          .eslintcache
+          tsconfig.tsbuildinfo
+        key: ${{ steps.cache-lint.cache-primary-key }}
+
   macos:
     needs: lint
     runs-on: macos-latest

package.json

@@ -43,7 +43,7 @@
     "test-eslint": "mocha .eslint/rules/**/*.test.js --ignore-leaks",
     "test-node-coverage": "nyc --reporter=lcov --reporter=text mocha --recursive test/modules ts/test-node ts/test-both",
     "test-lint-intl": "ts-node ./build/intl-linter/linter.ts --test",
-    "eslint": "eslint --cache . --max-warnings 0",
+    "eslint": "eslint --cache . --cache-strategy content --max-warnings 0",
     "lint": "run-s --print-label lint-prettier check:types eslint",
     "lint-deps": "node ts/util/lint/linter.js",
     "lint-license-comments": "ts-node ts/util/lint/license_comments.ts",