yapm/node_modules/package-yaml/index.js

package manager for io.js (npm fork)

var plugins = []

module.exports.setup = function(arr) {
  plugins = []
  arr.forEach(function(name) {
    try {
      var p = require('./plugins/' + name)
    } catch(_) {
      p = require(name)
    }

    plugins.push(p)
  })
}

// cb(err, object, filename)
module.exports.read = function(path, callback) {
  var arr = plugins.map(function(p) {
    return p.read
  })

  next()

  function next() {
    if (!arr.length) {
      var e = Error('Cannot find package descriptor file in ' + path)
      e.code = 'ENOENT'
      return callback(e)
    }

    var fn = arr.shift()
    fn(path, function(err, data) {
      if (!err || err.code !== 'ENOENT') return callback(err, data)
      next()
    })
  }
}

// cb(err, filename)
module.exports.write = function(path, object, callback) {
  var arr = plugins.slice(0)

  next()

  function next() {
    if (!arr.length) {
      return plugins[0].write(path, object, callback)
    }

    var p = arr.shift()
    p.stat(path, function(err) {
      if (err) return next()
      p.write(path, object, callback)
    })
  }
}

// cb(err, stat)
module.exports.stat = function(path, callback) {
  var arr = plugins.map(function(p) {
    return p.stat
  })

  next()

  function next() {
    if (!arr.length) {
      var e = Error('Cannot find package descriptor file in ' + path)
      e.code = 'ENOENT'
      return callback(e)
    }

    var fn = arr.shift()
    fn(path, function(err, data) {
      if (!err || err.code !== 'ENOENT') return callback(err, data)
      next()
    })
  }
}

module.exports.setup(['yaml', 'json5', 'json', 'indexjs'])

/**package {"name":"package-yaml","version":"0.0.0","description":"blah"} **/