build: check .ng-dev tool configuration in CI (angular#43322)

Checks the `.ng-dev` tool configuration in CI, compared
to doing it locally when the caretaker intends to perform
a merge and then realizes the config is broken.

PR Close angular#43322

.circleci/config.yml

@@ -291,6 +291,7 @@ jobs:
       - run: yarn -s ng-dev pullapprove verify
       - run: yarn -s ng-dev ngbot verify
       - run: yarn -s ng-dev commit-message validate-range $CI_GIT_BASE_REVISION $CI_GIT_REVISION
+      - run: yarn -s check-tooling-setup
 
   test:
     executor:

.ng-dev/merge.ts

@@ -1,33 +1,24 @@
-import {DevInfraMergeConfig} from '@angular/dev-infra-private/ng-dev/pr/merge/config';
-import {getDefaultTargetLabelConfiguration} from '@angular/dev-infra-private/ng-dev/pr/merge/defaults';
-import {github} from './github';
-import {release} from './release';
+import {MergeConfig} from '@angular/dev-infra-private/ng-dev/pr/merge/config';
 
 /**
  * Configuration for the merge tool in `ng-dev`. This sets up the labels which
  * are respected by the merge script (e.g. the target labels).
  */
-export const merge: DevInfraMergeConfig['merge'] = async api => {
-  return {
-    githubApiMerge: false,
-    claSignedLabel: 'cla: yes',
-    mergeReadyLabel: /^action: merge(-assistance)?/,
-    caretakerNoteLabel: /^(action: merge-assistance)|(PullApprove: disable)/,
-    commitMessageFixupLabel: 'commit message fixup',
-    breakingChangeLabel: 'flag: breaking change',
-    // We can pick any of the NPM packages as we are in a monorepo where all packages are
-    // published together with the same version and branching.
-    labels: await getDefaultTargetLabelConfiguration(api, github, release),
-    requiredBaseCommits: {
-      // PRs that target either `master` or the patch branch, need to be rebased
-      // on top of the latest commit message validation fix.
-      // These SHAs are the commits that update the required license text in the header.
-      'master': '5aeb9a4124922d8ac08eb73b8f322905a32b0b3a',
-      '10.0.x': '27b95ba64a5d99757f4042073fd1860e20e3ed24',
-    },
-    // `dev-infra` and `docs-infra` are not affecting the public NPM packages. Similarly,
-    // the `bazel` package is not considered part of the public API so that features
-    // can land in patch branches.
-    targetLabelExemptScopes: ['dev-infra', 'docs-infra', 'bazel']
-  };
+export const merge: MergeConfig = {
+  githubApiMerge: false,
+  claSignedLabel: 'cla: yes',
+  mergeReadyLabel: /^action: merge(-assistance)?/,
+  caretakerNoteLabel: /^(action: merge-assistance)|(PullApprove: disable)/,
+  commitMessageFixupLabel: 'commit message fixup',
+  requiredBaseCommits: {
+    // PRs that target either `master` or the patch branch, need to be rebased
+    // on top of the latest commit message validation fix.
+    // These SHAs are the commits that update the required license text in the header.
+    'master': '5aeb9a4124922d8ac08eb73b8f322905a32b0b3a',
+    '10.0.x': '27b95ba64a5d99757f4042073fd1860e20e3ed24',
+  },
+  // `dev-infra` and `docs-infra` are not affecting the public NPM packages. Similarly,
+  // the `bazel` package is not considered part of the public API so that features
+  // can land in patch branches.
+  targetLabelExemptScopes: ['dev-infra', 'docs-infra', 'bazel']
 };

.ng-dev/release.ts

@@ -22,7 +22,7 @@ export const release: ReleaseConfig = {
     '@angular/service-worker',
     '@angular/upgrade',
   ],
-  buildPackages: async (stampForRelease: boolean) => {
+  buildPackages: async (stampForRelease: boolean|undefined) => {
     // The buildTargetPackages function is loaded at runtime as the loading the script causes an
     // invocation of bazel.
     const {buildTargetPackages} = require(join(__dirname, '../scripts/build/package-builder'));

.ng-dev/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "strict": true,
+    "target": "es2015",
+    "module": "commonjs",
+    "noEmit": true,
+    "skipLibCheck": true,
+    "types": []
+  },
+}

package.json

@@ -35,7 +35,8 @@
     "symbol-extractor:check": "node tools/symbol-extractor/run_all_symbols_extractor_tests.js test",
     "symbol-extractor:update": "node tools/symbol-extractor/run_all_symbols_extractor_tests.js accept",
     "ts-circular-deps:check": "yarn -s ng-dev ts-circular-deps check --config ./packages/circular-deps-test.conf.js",
-    "ts-circular-deps:approve": "yarn -s ng-dev ts-circular-deps approve --config ./packages/circular-deps-test.conf.js"
+    "ts-circular-deps:approve": "yarn -s ng-dev ts-circular-deps approve --config ./packages/circular-deps-test.conf.js",
+    "check-tooling-setup": "yarn tsc --project .ng-dev/tsconfig.json"
   },
   "// 1": "dependencies are used locally and by bazel",
   "dependencies": {