37 lines
1.1 KiB
TypeScript
37 lines
1.1 KiB
TypeScript
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/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import * as postcss from 'postcss';
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import * as File from 'vinyl';
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import * as es from 'event-stream';
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export function gulpPostcss(plugins: postcss.AcceptedPlugin[], handleError?: (err: Error) => void) {
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const instance = postcss(plugins);
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return es.map((file: File, callback: (error?: any, file?: any) => void) => {
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if (file.isNull()) {
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return callback(null, file);
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}
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if (file.isStream()) {
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return callback(new Error('Streaming not supported'));
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}
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instance
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.process(file.contents.toString(), { from: file.path })
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.then((result) => {
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file.contents = Buffer.from(result.css);
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callback(null, file);
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})
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.catch((error) => {
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if (handleError) {
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handleError(error);
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callback();
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} else {
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callback(error);
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}
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});
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});
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}
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