wishthis/node_modules/gulp-autoprefixer/index.js
2022-01-21 09:28:41 +01:00

56 lines
1.5 KiB
JavaScript

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