fix(ng-update): material update fails due to circular dependency (#16538)

Currently running `ng update` for both Material and CDK fails because there
is a circular dependency in the CDK schematics that cause the update-tool
exports to be not available to the Material ng-update schematic.

Without putting to much effort into ensuring no circular dependencies, this
commit also sets up Madge to avoid such issues in the future.

Author: devversion

.circleci/config.yml

@@ -312,6 +312,10 @@ jobs:
       - run: yarn gulp ci:build-release-packages
       - run: yarn check-release-output
 
+      # TODO(devversion): replace this with bazel tests that run Madge. This is
+      # cumbersome and doesn't guarantee no circular deps for other entry-points.
+      - run: yarn madge --circular dist/releases/cdk/schematics/index.js
+
       # Store the release output in the workspace storage. This means that other jobs
       # in the same workflow can attach the release output to their job.
       - persist_to_workspace:

package.json

@@ -124,6 +124,7 @@
     "karma-parallel": "^0.3.0",
     "karma-sauce-launcher": "^2.0.2",
     "karma-sourcemap-loader": "^0.3.7",
+    "madge": "^3.4.4",
     "magic-string": "^0.22.4",
     "marked": "^0.6.2",
     "merge2": "^1.2.3",

src/cdk/schematics/ng-update/upgrade-rules/input-names-rule.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {findInputsOnElementWithAttr, findInputsOnElementWithTag} from '../..';
+import {findInputsOnElementWithAttr, findInputsOnElementWithTag} from '../html-parsing/angular';
 import {ResolvedResource} from '../../update-tool/component-resource-collector';
 import {MigrationRule} from '../../update-tool/migration-rule';
 

src/cdk/schematics/ng-update/upgrade-rules/misc-template-rule.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {TargetVersion} from '../..';
+import {TargetVersion} from '../../update-tool/target-version';
 import {ResolvedResource} from '../../update-tool/component-resource-collector';
 import {MigrationRule} from '../../update-tool/migration-rule';
 import {findAllSubstringIndices} from '../typescript/literal';