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