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2 changes: 0 additions & 2 deletions packages/angular/cli/commands/add-impl.ts
Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,6 @@ import { colors } from '../utilities/color';
import { getPackageManager } from '../utilities/package-manager';
import {
NgAddSaveDepedency,
PackageIdentifier,
PackageManifest,
fetchPackageManifest,
fetchPackageMetadata,
Expand All @@ -29,7 +28,6 @@ const npa = require('npm-package-arg');

export class AddCommand extends SchematicCommand<AddCommandSchema> {
readonly allowPrivateSchematics = true;
readonly allowAdditionalArgs = true;

async run(options: AddCommandSchema & Arguments) {
if (!options.collection) {
Expand Down
7 changes: 4 additions & 3 deletions packages/angular/cli/models/schematic-command.ts
Original file line number Diff line number Diff line change
Expand Up @@ -73,7 +73,6 @@ export abstract class SchematicCommand<
T extends BaseSchematicSchema & BaseCommandOptions
> extends Command<T> {
readonly allowPrivateSchematics: boolean = false;
readonly allowAdditionalArgs: boolean = false;
private _host = new NodeJsSyncHost();
private _workspace: workspaces.WorkspaceDefinition;
protected _workflow: NodeWorkflow;
Expand Down Expand Up @@ -466,8 +465,10 @@ export abstract class SchematicCommand<
args = await this.parseArguments(schematicOptions || [], o);
}

// ng-add is special because we don't know all possible options at this point
if (args['--'] && !this.allowAdditionalArgs) {
const allowAdditionalProperties =
typeof schematic.description.schemaJson === 'object' && schematic.description.schemaJson.additionalProperties;

if (args['--'] && !allowAdditionalProperties) {
args['--'].forEach(additional => {
this.logger.fatal(`Unknown option: '${additional.split(/=/)[0]}'`);
});
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10 changes: 9 additions & 1 deletion tests/legacy-cli/e2e/tests/commands/add/add-material.ts
Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,15 @@ export default async function () {
// forcibly remove in case another test doesn't clean itself up
await rimraf('node_modules/@angular/material');

await ng('add', '@angular/material');
try {
await ng('add', '@angular/material', '--unknown');
} catch (error) {
if (!(error.message && error.message.includes(`Unknown option: '--unknown'`))) {
throw error;
}
}

await ng('add', '@angular/material', '--theme', 'custom', '--verbose');
await expectFileToMatch('package.json', /@angular\/material/);

const output1 = await ng('add', '@angular/material');
Expand Down