56 lines
1.5 KiB
JavaScript
56 lines
1.5 KiB
JavaScript
'use strict';
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const fancyLog = require('fancy-log');
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const PluginError = require('plugin-error');
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const through = require('through2');
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const applySourceMap = require('vinyl-sourcemaps-apply');
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const autoprefixer = require('autoprefixer');
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const postcss = require('postcss');
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module.exports = options => {
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return through.obj((file, encoding, callback) => {
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if (file.isNull()) {
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callback(null, file);
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return;
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}
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if (file.isStream()) {
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callback(new PluginError('gulp-autoprefixer', 'Streaming not supported'));
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return;
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}
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postcss(autoprefixer(options)).process(file.contents.toString(), {
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map: file.sourceMap ? {annotation: false} : false,
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from: file.path,
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to: file.path
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}).then(result => {
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file.contents = Buffer.from(result.css);
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if (result.map && file.sourceMap) {
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const map = result.map.toJSON();
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map.file = file.relative;
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map.sources = map.sources.map(() => file.relative);
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applySourceMap(file, map);
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}
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const warnings = result.warnings();
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if (warnings.length > 0) {
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fancyLog('gulp-autoprefixer:', '\n ' + warnings.join('\n '));
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}
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setImmediate(callback, null, file);
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}).catch(error => {
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const cssError = error.name === 'CssSyntaxError';
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if (cssError) {
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error.message += error.showSourceCode();
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}
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// Prevent stream unhandled exception from being suppressed by Promise
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setImmediate(callback, new PluginError('gulp-autoprefixer', error, {
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fileName: file.path,
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showStack: !cssError
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}));
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});
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});
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};
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