postcss/lib/parse.js

let Parser = require('./parser')
let Input = require('./input')
let Container = require('./container')

function parse (css, opts) {
  let input = new Input(css, opts)
  let parser = new Parser(input)
  try {
    parser.parse()
  } catch (e) {
    if (process.env.NODE_ENV !== 'production') {
      if (e.name === 'CssSyntaxError' && opts && opts.from) {
        if (/\.scss$/i.test(opts.from)) {
          e.message += '\nYou tried to parse SCSS with ' +
                       'the standard CSS parser; ' +
                       'try again with the postcss-scss parser'
        } else if (/\.sass/i.test(opts.from)) {
          e.message += '\nYou tried to parse Sass with ' +
                       'the standard CSS parser; ' +
                       'try again with the postcss-sass parser'
        } else if (/\.less$/i.test(opts.from)) {
          e.message += '\nYou tried to parse Less with ' +
                       'the standard CSS parser; ' +
                       'try again with the postcss-less parser'
        }
      }
    }
    throw e
  }

  return parser.root
}

module.exports = parse

Container.registerParse(parse)