feat(@angular/cli): deprecated defaultProject option

With this change we deprecate the angular.json `defaultProject` option.

DEPRECATED:

The `defaultProject` workspace option has been deprecated. The project to use will be determined from the current working directory.

Closes #20661

packages/angular/cli/lib/config/workspace-schema.json

@@ -22,7 +22,8 @@
     },
     "defaultProject": {
       "type": "string",
-      "description": "Default project name used in commands."
+      "description": "Default project name used in commands.",
+      "x-deprecated": "The project to use will be determined from the current working directory."
     },
     "projects": {
       "type": "object",

packages/angular/cli/src/command-builder/architect-command-module.ts

@@ -128,14 +128,14 @@ export abstract class ArchitectCommandModule
       // For multi target commands, we always list all projects that have the target.
       return allProjectsForTargetName;
     } else {
+      if (allProjectsForTargetName.length === 1) {
+        return allProjectsForTargetName;
+      }
+
       const maybeProject = getProjectByCwd(workspace);
       if (maybeProject && allProjectsForTargetName.includes(maybeProject)) {
         return [maybeProject];
       }
-
-      if (allProjectsForTargetName.length === 1) {
-        return allProjectsForTargetName;
-      }
     }
 
     return undefined;

packages/angular/cli/src/command-builder/schematics-command-module.ts

@@ -333,6 +333,7 @@ export abstract class SchematicsCommandModule
     return 0;
   }
 
+  private defaultProjectDeprecationWarningShown = false;
   private getProjectName(): string | undefined {
     const { workspace, logger } = this.context;
     if (!workspace) {
@@ -354,6 +355,15 @@ export abstract class SchematicsCommandModule
 
       const defaultProjectName = workspace.extensions['defaultProject'];
       if (typeof defaultProjectName === 'string' && defaultProjectName) {
+        if (!this.defaultProjectDeprecationWarningShown) {
+          logger.warn(tags.oneLine`
+            DEPRECATED: The 'defaultProject' workspace option has been deprecated.
+            The project to use will be determined from the current working directory.
+          `);
+
+          this.defaultProjectDeprecationWarningShown = true;
+        }
+
         return defaultProjectName;
       }
     }

packages/angular/cli/src/commands/add/long-description.md

@@ -1,10 +1,7 @@
 Adds the npm package for a published library to your workspace, and configures
-the project in the current working directory (or the default project if you are
-not in a project directory) to use that library, as specified by the library's schematic.
+the project in the current working directory to use that library, as specified by the library's schematic.
 For example, adding `@angular/pwa` configures your project for PWA support:
 
 ```bash
 ng add @angular/pwa
 ```
-
-The default project is the value of `defaultProject` in `angular.json`.

packages/angular/cli/src/utilities/config.ts

@@ -263,6 +263,7 @@ function findProjectByPath(workspace: AngularWorkspace, location: string): strin
   return projects[0][1];
 }
 
+let defaultProjectDeprecationWarningShown = false;
 export function getProjectByCwd(workspace: AngularWorkspace): string | null {
   if (workspace.projects.size === 1) {
     // If there is only one project, return that one.
@@ -277,6 +278,15 @@ export function getProjectByCwd(workspace: AngularWorkspace): string | null {
   const defaultProject = workspace.extensions['defaultProject'];
   if (defaultProject && typeof defaultProject === 'string') {
     // If there is a default project name, return it.
+    if (!defaultProjectDeprecationWarningShown) {
+      console.warn(
+        `DEPRECATED: The 'defaultProject' workspace option has been deprecated. ` +
+          `The project to use will be determined from the current working directory.`,
+      );
+
+      defaultProjectDeprecationWarningShown = true;
+    }
+
     return defaultProject;
   }
 

tests/legacy-cli/e2e/tests/misc/multiple-targets.ts

@@ -5,10 +5,6 @@ import { updateJsonFile } from '../../utils/project';
 export default async function () {
   await ng('generate', 'app', 'secondary-app');
 
-  await updateJsonFile('angular.json', workspaceJson => {
-    workspaceJson.defaultProject = undefined;
-  });
-
   await ng('build', 'secondary-app', '--configuration=development');
 
   expectFileToExist('dist/secondary-app/index.html');