atom/src/babel.js at master · githubhjs/atom · GitHub

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'use strict'

var crypto = require('crypto')

var path = require('path')

var defaultOptions = require('../static/babelrc.json')

var babel = null

var babelVersionDirectory = null

var PREFIXES = [

'/** @babel */',

'"use babel"',

'\'use babel\''

]

var PREFIX_LENGTH = Math.max.apply(Math, PREFIXES.map(function (prefix) {

return prefix.length

}))

exports.shouldCompile = function (sourceCode) {

var start = sourceCode.substr(0, PREFIX_LENGTH)

return PREFIXES.some(function (prefix) {

return start.indexOf(prefix) === 0

})

}

exports.getCachePath = function (sourceCode) {

if (babelVersionDirectory == null) {

var babelVersion = require('babel-core/package.json').version

babelVersionDirectory = path.join('js', 'babel', createVersionAndOptionsDigest(babelVersion, defaultOptions))

}

return path.join(

babelVersionDirectory,

crypto

.createHash('sha1')

.update(sourceCode, 'utf8')

.digest('hex') + '.js'

)

}

exports.compile = function (sourceCode, filePath) {

if (!babel) {

babel = require('babel-core')

}

var options = {filename: filePath}

for (var key in defaultOptions) {

options[key] = defaultOptions[key]

}

return babel.transform(sourceCode, options).code

}

function createVersionAndOptionsDigest (version, options) {

return crypto

.createHash('sha1')

.update('babel-core', 'utf8')

.update('\0', 'utf8')

.update(version, 'utf8')

.update('\0', 'utf8')

.update(JSON.stringify(options), 'utf8')

.digest('hex')

}

atom/src/babel.js at master · githubhjs/atom · GitHub

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