Use default concurrency value for lerna run (#8462)

The default concurrency value for leran run is the number of logical CPU
cores. This is better than arbitrarily using 4 threads, since different
machines may be able to handle more.

.github/workflows/test-all.yml

@@ -92,7 +92,7 @@ jobs:
     - name: Run unit tests
       # Ignore auth and firestore since they're handled in their own separate jobs.
       run: |
-        xvfb-run yarn lerna run --ignore '{firebase-messaging-integration-test,@firebase/auth*,@firebase/firestore*,firebase-firestore-integration-test}' --concurrency 4 test:ci
+        xvfb-run yarn lerna run --ignore '{firebase-messaging-integration-test,@firebase/auth*,@firebase/firestore*,firebase-firestore-integration-test}' test:ci
         node scripts/print_test_logs.js
       env:
         FIREBASE_TOKEN: ${{ secrets.FIREBASE_CLI_TOKEN }}
@@ -142,7 +142,7 @@ jobs:
       run: echo "FIREBASE_CI_TEST_START_TIME=$(date +%s)" >> $GITHUB_ENV
     - name: Run unit tests
       run: |
-        xvfb-run yarn lerna run --concurrency 4 test:ci --scope '@firebase/auth*'
+        xvfb-run yarn lerna run test:ci --scope '@firebase/auth*'
         node scripts/print_test_logs.js
       env:
         FIREBASE_TOKEN: ${{ secrets.FIREBASE_CLI_TOKEN }}
@@ -182,7 +182,7 @@ jobs:
       run: echo "FIREBASE_CI_TEST_START_TIME=$(date +%s)" >> $GITHUB_ENV
     - name: Run unit tests
       run: |
-        xvfb-run yarn lerna run --concurrency 4 test:ci --scope '@firebase/firestore*'
+        xvfb-run yarn lerna run test:ci --scope '@firebase/firestore*'
         node scripts/print_test_logs.js
       env:
         FIREBASE_TOKEN: ${{ secrets.FIREBASE_CLI_TOKEN }}

package.json

@@ -30,8 +30,8 @@
     "repl": "node tools/repl.js",
     "release": "ts-node-script scripts/release/cli.ts",
     "pretest": "node tools/pretest.js",
-    "test": "lerna run --ignore firebase-messaging-integration-test --concurrency 4 --stream test",
-    "test:ci": "lerna run --ignore firebase-messaging-integration-test --concurrency 4 test:ci",
+    "test": "lerna run --ignore firebase-messaging-integration-test --stream test",
+    "test:ci": "lerna run --ignore firebase-messaging-integration-test test:ci",
     "pretest:coverage": "mkdirp coverage",
     "ci:coverage": "lcov-result-merger 'packages/**/lcov.info' 'lcov-all.info'",
     "test:coverage": "lcov-result-merger 'packages/**/lcov.info' | coveralls",

scripts/ci-test/test_changed.ts

@@ -59,7 +59,7 @@ async function runTests(config: TestConfig) {
       process.exit(0);
     }
 
-    const lernaCmd = ['lerna', 'run', '--concurrency', '4'];
+    const lernaCmd = ['lerna', 'run'];
     console.log(chalk`{blue Running tests in:}`);
     for (const task of testTasks) {
       if (task.reason === TestReason.Changed) {