晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

HOME


sh-3ll 1.0
DIR:/lib/node_modules/npm/lib/install/
Upload File :
Current File : //lib/node_modules/npm/lib/install/validate-args.js
'use strict'
var validate = require('aproba')
var asyncMap = require('slide').asyncMap
var chain = require('slide').chain
var npmInstallChecks = require('npm-install-checks')
var iferr = require('iferr')
var checkEngine = npmInstallChecks.checkEngine
var checkPlatform = npmInstallChecks.checkPlatform
var npm = require('../npm.js')

module.exports = function (idealTree, args, next) {
  validate('OAF', arguments)
  var force = npm.config.get('force')

  asyncMap(args, function (pkg, done) {
    chain([
      [hasMinimumFields, pkg],
      [checkSelf, idealTree, pkg, force],
      [isInstallable, idealTree, pkg]
    ], done)
  }, next)
}

function hasMinimumFields (pkg, cb) {
  if (pkg.name === '' || pkg.name == null) {
    return cb(new Error(`Can't install ${pkg._resolved}: Missing package name`))
  } else if (pkg.version === '' || pkg.version == null) {
    return cb(new Error(`Can't install ${pkg._resolved}: Missing package version`))
  } else {
    return cb()
  }
}

function setWarnings (idealTree, warn) {
  function top (tree) {
    if (tree.parent) return top(tree.parent)
    return tree
  }

  var topTree = top(idealTree)
  if (!topTree.warnings) topTree.warnings = []

  if (topTree.warnings.every(i => (
    i.code !== warn.code ||
    i.required !== warn.required ||
    i.pkgid !== warn.pkgid))) {
    topTree.warnings.push(warn)
  }
}

var isInstallable = module.exports.isInstallable = function (idealTree, pkg, next) {
  var force = npm.config.get('force')
  var nodeVersion = npm.config.get('node-version')
  if (/-/.test(nodeVersion)) {
    // for the purposes of validation, if the node version is a prerelease,
    // strip that. We check and warn about this sceanrio over in validate-tree.
    nodeVersion = nodeVersion.replace(/-.*/, '')
  }
  var strict = npm.config.get('engine-strict')
  checkEngine(pkg, npm.version, nodeVersion, force, strict, iferr(next, thenWarnEngineIssues))
  function thenWarnEngineIssues (warn) {
    if (idealTree && warn) setWarnings(idealTree, warn)
    checkPlatform(pkg, force, next)
  }
}

function checkSelf (idealTree, pkg, force, next) {
  if (idealTree.package && idealTree.package.name !== pkg.name) return next()
  if (force) {
    var warn = new Error("Wouldn't install " + pkg.name + ' as a dependency of itself, but being forced')
    warn.code = 'ENOSELF'
    idealTree.warnings.push(warn)
    next()
  } else {
    var er = new Error('Refusing to install package with name "' + pkg.name +
     '" under a package\n' +
     'also called "' + pkg.name + '". Did you name your project the same\n' +
     'as the dependency you\'re installing?\n\n' +
     'For more information, see:\n' +
     '    <https://docs.npmjs.com/cli/install#limitations-of-npms-install-algorithm>')
    er.code = 'ENOSELF'
    next(er)
  }
}