scss-to-css/lib/index.js

/*! sass.js - v0.10.13 (7209593) - built 2018-11-19
  providing libsass 3.5.5 (39e30874)
  via emscripten 1.38.18 (7a0e274)
 */
var Sass = require('./sass.lib.js')
var fs = require('fs')
var path = require('path')

function fileExists(path) {
  var stat = fs.statSync(path)
  return stat && stat.isFile()
}

function removeFileExtension(path) {
  return path.slice(0, path.lastIndexOf('.'))
}

function importFileToSass(path, done) {
  // any path must be relative to CWD to work in both environments (real FS, and emscripten FS)
  var requestedPath = './' + path
  // figure out the *actual* path of the file
  var filesystemPath = Sass.findPathVariation(fileExists, requestedPath)
  if (!filesystemPath) {
    done({
      error: 'File "' + requestedPath + '" not found'
    })

    return
  }

  // Make sure to omit the ".css" file extension when it was omitted in requestedPath.
  // This allow raw css imports.
  // see https://github.com/sass/libsass/pull/754
  var isRawCss =
    !requestedPath.endsWith('.css') && filesystemPath.endsWith('.css')
  var targetPath = isRawCss
    ? removeFileExtension(filesystemPath)
    : filesystemPath

  // write the file to emscripten FS so libsass internal FS handling
  // can engage the scss/sass switch, which apparently does not happen
  // for content provided through the importer callback directly
  var content = fs.readFileSync(filesystemPath, { encoding: 'utf8' })
  Sass.writeFile(filesystemPath, content, function() {
    done({
      path: targetPath
    })
  })
}

function importerCallback(request, done) {
  importFileToSass(resolve(request), done)
}

function compileFile(path, options, callback) {
  if (!callback) {
    callback = options
    options = {}
  }

  Sass.importer(importerCallback)
  importFileToSass(path, function() {
    Sass.compileFile(path, options, callback)
  })
}

function resolve(request) {
  // the request will not have the correct "resolved" path on Windows
  // see https://github.com/medialize/sass.js/issues/69
  // see https://github.com/medialize/sass.js/issues/86
  return path
    .normalize(
      path.join(
        // sass.js works in the "/sass/" directory, make that relative to CWD
        path.dirname(request.previous.replace(/^\/sass\//, '')),
        request.current
      )
    )
    .replace(/\\/g, '/')
}

compileFile.importFileToSass = importFileToSass
compileFile.Sass = Sass

module.exports = compileFile