gulp-convert-css-var/dev.js

convert css variable to refer value, and add it to the top of corresponding css rule.

let gutil = require('gulp-util'),
    convert = require('./index');

var fs = require('fs')

let cssStr = fs.readFileSync('./test.css')

let stream = convert()
var fakeFile = new gutil.File({
    contents: cssStr
})

stream.on('data',(newFile) => {
    let str = newFile.contents.toString()
    fs.writeFileSync('./test_dest.css',str)
})

stream.write(fakeFile)
stream.end()