35 lines
1.0 KiB
TypeScript
35 lines
1.0 KiB
TypeScript
|
/**
|
||
|
|
* @license
|
||
|
|
* Copyright Google Inc. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* Use of this source code is governed by an MIT-style license that can be
|
||
|
|
* found in the LICENSE file at https://angular.io/license
|
||
|
|
*/
|
||
|
|
|
||
|
|
type Inquirer = typeof import('inquirer');
|
||
|
|
|
||
|
|
let resolvedInquirerModule: Inquirer|null;
|
||
|
|
|
||
|
|
try {
|
||
|
|
// "inquirer" is the prompt module also used by the devkit schematics CLI
|
||
|
|
// in order to show prompts for schematics. We transitively depend on this
|
||
|
|
// module, but don't want to throw an exception if the module is not
|
||
|
|
// installed for some reason. In that case prompts are just not supported.
|
||
|
|
resolvedInquirerModule = require('inquirer');
|
||
|
|
} catch (e) {
|
||
|
|
resolvedInquirerModule = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Whether prompts are currently supported. */
|
||
|
|
export function supportsPrompt(): boolean {
|
||
|
|
return !!resolvedInquirerModule && !!process.stdin.isTTY;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the resolved instance of "inquirer" which can be used to programmatically
|
||
|
|
* create prompts.
|
||
|
|
*/
|
||
|
|
export function getInquirer(): Inquirer {
|
||
|
|
return resolvedInquirerModule !;
|
||
|
|
}
|