fix(mdc-migration): migrate components selectively bug

Fixes mdc-migration to migrate only the selected components.

Fixes #26426

Author: llorenspujol

src/material/schematics/ng-generate/mdc-migration/rules/ts-migration/runtime-migration.ts

@@ -65,6 +65,16 @@ export class RuntimeCodeMigration extends Migration<ComponentMigrator[], Schemat
       });
   }
 
+  private _importPathHasComponentToMigrate(importTextPath: string): boolean {
+    const lastImportName = importTextPath.split('/').slice(-1)[0];
+    return (
+      lastImportName === 'legacy-core' ||
+      !!this.upgradeData.find(componentMigrator => {
+        return lastImportName.includes(componentMigrator.component);
+      })
+    );
+  }
+
   /** Finds the imported symbols in a file that need to be migrated. */
   private _findImportsToMigrate(sourceFile: ts.SourceFile) {
     const importSpecifiersToNewNames = new Map<ts.ImportSpecifier, string>();
@@ -77,7 +87,8 @@ export class RuntimeCodeMigration extends Migration<ComponentMigrator[], Schemat
         ts.isStringLiteral(statement.moduleSpecifier) &&
         statement.importClause?.namedBindings &&
         ts.isNamedImports(statement.importClause.namedBindings) &&
-        LEGACY_MODULES.has(statement.moduleSpecifier.text)
+        LEGACY_MODULES.has(statement.moduleSpecifier.text) &&
+        this._importPathHasComponentToMigrate(statement.moduleSpecifier.text)
       ) {
         statement.importClause.namedBindings.elements.forEach(element => {
           const oldName = (element.propertyName || element.name).text;

src/material/schematics/ng-generate/mdc-migration/rules/ts-migration/runtime-migrator.spec.ts

@@ -385,6 +385,49 @@ describe('runtime code migration', () => {
     );
   });
 
+  it('should not replace imports from non selected components', async () => {
+    declareLibrarySymbols('legacy-button', 'export declare class MatLegacyButtonModule {};');
+    declareLibrarySymbols('legacy-checkbox', 'export declare class MatLegacyCheckboxModule {};');
+
+    await runMigrationTest(
+      `
+        import {NgModule} from '@angular/core';
+        import {MatLegacyButtonModule} from '@angular/material/legacy-button';
+        import {MatLegacyCheckboxModule} from '@angular/material/legacy-checkbox';
+
+        @NgModule({imports: [MatLegacyButtonModule, MatLegacyCheckboxModule]})
+        export class AppModule {}
+      `,
+      `
+        import {NgModule} from '@angular/core';
+        import {MatButtonModule} from '@angular/material/button';
+        import {MatLegacyCheckboxModule} from '@angular/material/legacy-checkbox';
+
+        @NgModule({imports: [MatButtonModule, MatLegacyCheckboxModule]})
+        export class AppModule {}
+      `,
+    );
+  });
+
+  it('should always replace legacy-core imports even if they are not specified', async () => {
+    await runMigrationTest(
+      `
+        import {NgModule} from '@angular/core';
+        import {MatLegacyOptionModule as MatOptionModule, LEGACY_VERSION as VERSION} from '@angular/material/legacy-core';
+
+        @NgModule({imports: [MatOptionModule]})
+        export class AppModule {}
+      `,
+      `
+        import {NgModule} from '@angular/core';
+        import {MatOptionModule, VERSION} from '@angular/material/core';
+
+        @NgModule({imports: [MatOptionModule]})
+        export class AppModule {}
+      `,
+    );
+  });
+
   it('should migrate styles for a component', async () => {
     await runMigrationTest(
       `