53 lines
1.3 KiB
JavaScript
53 lines
1.3 KiB
JavaScript
'use strict';
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var gutil = require('gulp-util');
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var through = require('through2');
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var applySourceMap = require('vinyl-sourcemaps-apply');
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var autoprefixer = require('autoprefixer');
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var postcss = require('postcss');
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module.exports = function (opts) {
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return through.obj(function (file, enc, cb) {
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if (file.isNull()) {
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cb(null, file);
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return;
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}
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if (file.isStream()) {
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cb(new gutil.PluginError('gulp-autoprefixer', 'Streaming not supported'));
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return;
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}
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postcss(autoprefixer(opts)).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(function (res) {
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file.contents = new Buffer(res.css);
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if (res.map && file.sourceMap) {
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applySourceMap(file, res.map.toString());
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}
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var warnings = res.warnings();
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if (warnings.length > 0) {
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gutil.log('gulp-autoprefixer:', '\n ' + warnings.join('\n '));
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}
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setImmediate(cb, null, file);
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}).catch(function (err) {
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var cssError = err.name === 'CssSyntaxError';
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if (cssError) {
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err.message += err.showSourceCode();
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}
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// prevent stream unhandled exception from being suppressed by Promise
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setImmediate(cb, new gutil.PluginError('gulp-autoprefixer', err, {
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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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