3da83322
 Administrator
21.03.16 Versrka
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'use strict';
var gutil = require('gulp-util');
var through = require('through2');
var applySourceMap = require('vinyl-sourcemaps-apply');
var autoprefixer = require('autoprefixer');
var postcss = require('postcss');
module.exports = function (opts) {
return through.obj(function (file, enc, cb) {
if (file.isNull()) {
cb(null, file);
return;
}
if (file.isStream()) {
cb(new gutil.PluginError('gulp-autoprefixer', 'Streaming not supported'));
return;
}
postcss(autoprefixer(opts)).process(file.contents.toString(), {
map: file.sourceMap ? {annotation: false} : false,
from: file.path,
to: file.path
}).then(function (res) {
file.contents = new Buffer(res.css);
if (res.map && file.sourceMap) {
applySourceMap(file, res.map.toString());
}
var warnings = res.warnings();
if (warnings.length > 0) {
gutil.log('gulp-autoprefixer:', '\n ' + warnings.join('\n '));
}
setImmediate(cb, null, file);
}).catch(function (err) {
var cssError = err.name === 'CssSyntaxError';
if (cssError) {
err.message += err.showSourceCode();
}
// prevent stream unhandled exception from being suppressed by Promise
setImmediate(cb, new gutil.PluginError('gulp-autoprefixer', err, {
fileName: file.path,
showStack: !cssError
}));
});
});
};
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