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Edit File : index.js \| Size : 4.10 KB
var fs = require('fs') var path = require('path') var util = require('util') var semver = require('semver') exports.checkEngine = checkEngine function checkEngine (target, npmVer, nodeVer, force, strict, cb) { var nodev = force ? null : nodeVer var eng = target.engines var opt = { includePrerelease: true } if (!eng) return cb() if (nodev && eng.node && !semver.satisfies(nodev, eng.node, opt) \|\| eng.npm && !semver.satisfies(npmVer, eng.npm, opt)) { var er = new Error(util.format('Unsupported engine for %s: wanted: %j (current: %j)', target._id, eng, {node: nodev, npm: npmVer})) er.code = 'ENOTSUP' er.required = eng er.pkgid = target._id if (strict) { return cb(er) } else { return cb(null, er) } } return cb() } exports.checkPlatform = checkPlatform function checkPlatform (target, force, cb) { var platform = process.platform var arch = process.arch var osOk = true var cpuOk = true if (force) { return cb() } if (target.os) { osOk = checkList(platform, target.os) } if (target.cpu) { cpuOk = checkList(arch, target.cpu) } if (!osOk \|\| !cpuOk) { var er = new Error(util.format('Unsupported platform for %s: wanted %j (current: %j)', target._id, target, {os: platform, cpu: arch})) er.code = 'EBADPLATFORM' er.os = target.os \|\| ['any'] er.cpu = target.cpu \|\| ['any'] er.pkgid = target._id return cb(er) } return cb() } function checkList (value, list) { var tmp var match = false var blc = 0 if (typeof list === 'string') { list = [list] } if (list.length === 1 && list[0] === 'any') { return true } for (var i = 0; i < list.length; ++i) { tmp = list[i] if (tmp[0] === '!') { tmp = tmp.slice(1) if (tmp === value) { return false } ++blc } else { match = match \|\| tmp === value } } return match \|\| blc === list.length } exports.checkCycle = checkCycle function checkCycle (target, ancestors, cb) { // there are some very rare and pathological edge-cases where // a cycle can cause npm to try to install a never-ending tree // of stuff. // Simplest: // // A -> B -> A' -> B' -> A -> B -> A' -> B' -> A -> ... // // Solution: Simply flat-out refuse to install any name@version // that is already in the prototype tree of the ancestors object. // A more correct, but more complex, solution would be to symlink // the deeper thing into the new location. // Will do that if anyone whines about this irl. // // Note: `npm install foo` inside of the `foo` package will abort // earlier if `--force` is not set. However, if it IS set, then // we need to still fail here, but just skip the first level. Of // course, it'll still fail eventually if it's a true cycle, and // leave things in an undefined state, but that's what is to be // expected when `--force` is used. That is why getPrototypeOf // is used twice here: to skip the first level of repetition. var p = Object.getPrototypeOf(Object.getPrototypeOf(ancestors)) var name = target.name var version = target.version while (p && p !== Object.prototype && p[name] !== version) { p = Object.getPrototypeOf(p) } if (p[name] !== version) return cb() var er = new Error(target._id + ': Unresolvable cycle detected') var tree = [target._id, JSON.parse(JSON.stringify(ancestors))] var t = Object.getPrototypeOf(ancestors) while (t && t !== Object.prototype) { if (t === p) t.THIS_IS_P = true tree.push(JSON.parse(JSON.stringify(t))) t = Object.getPrototypeOf(t) } er.pkgid = target._id er.code = 'ECYCLE' return cb(er) } exports.checkGit = checkGit function checkGit (folder, cb) { // if it's a git repo then don't touch it! fs.lstat(folder, function (er, s) { if (er \|\| !s.isDirectory()) return cb() else checkGit_(folder, cb) }) } function checkGit_ (folder, cb) { fs.stat(path.resolve(folder, '.git'), function (er, s) { if (!er && s.isDirectory()) { var e = new Error(folder + ': Appears to be a git repo or submodule.') e.path = folder e.code = 'EISGIT' return cb(e) } cb() }) } Back

Edit File : index.js | Size : 4.10 KB

var fs = require('fs')
var path = require('path')
var util = require('util')
var semver = require('semver')

exports.checkEngine = checkEngine
function checkEngine (target, npmVer, nodeVer, force, strict, cb) {
  var nodev = force ? null : nodeVer
  var eng = target.engines
  var opt = { includePrerelease: true }
  if (!eng) return cb()
  if (nodev && eng.node && !semver.satisfies(nodev, eng.node, opt) ||
      eng.npm && !semver.satisfies(npmVer, eng.npm, opt)) {
    var er = new Error(util.format('Unsupported engine for %s: wanted: %j (current: %j)',
      target._id, eng, {node: nodev, npm: npmVer}))
    er.code = 'ENOTSUP'
    er.required = eng
    er.pkgid = target._id
    if (strict) {
      return cb(er)
    } else {
      return cb(null, er)
    }
  }
  return cb()
}

exports.checkPlatform = checkPlatform
function checkPlatform (target, force, cb) {
  var platform = process.platform
  var arch = process.arch
  var osOk = true
  var cpuOk = true

if (force) {
    return cb()
  }

if (target.os) {
    osOk = checkList(platform, target.os)
  }
  if (target.cpu) {
    cpuOk = checkList(arch, target.cpu)
  }
  if (!osOk || !cpuOk) {
    var er = new Error(util.format('Unsupported platform for %s: wanted %j (current: %j)',
      target._id, target, {os: platform, cpu: arch}))
    er.code = 'EBADPLATFORM'
    er.os = target.os || ['any']
    er.cpu = target.cpu || ['any']
    er.pkgid = target._id
    return cb(er)
  }
  return cb()
}

function checkList (value, list) {
  var tmp
  var match = false
  var blc = 0
  if (typeof list === 'string') {
    list = [list]
  }
  if (list.length === 1 && list[0] === 'any') {
    return true
  }
  for (var i = 0; i < list.length; ++i) {
    tmp = list[i]
    if (tmp[0] === '!') {
      tmp = tmp.slice(1)
      if (tmp === value) {
        return false
      }
      ++blc
    } else {
      match = match || tmp === value
    }
  }
  return match || blc === list.length
}

exports.checkCycle = checkCycle
function checkCycle (target, ancestors, cb) {
  // there are some very rare and pathological edge-cases where
  // a cycle can cause npm to try to install a never-ending tree
  // of stuff.
  // Simplest:
  //
  // A -> B -> A' -> B' -> A -> B -> A' -> B' -> A -> ...
  //
  // Solution: Simply flat-out refuse to install any name@version
  // that is already in the prototype tree of the ancestors object.
  // A more correct, but more complex, solution would be to symlink
  // the deeper thing into the new location.
  // Will do that if anyone whines about this irl.
  //
  // Note: `npm install foo` inside of the `foo` package will abort
  // earlier if `--force` is not set.  However, if it IS set, then
  // we need to still fail here, but just skip the first level. Of
  // course, it'll still fail eventually if it's a true cycle, and
  // leave things in an undefined state, but that's what is to be
  // expected when `--force` is used.  That is why getPrototypeOf
  // is used *twice* here: to skip the first level of repetition.

var p = Object.getPrototypeOf(Object.getPrototypeOf(ancestors))
  var name = target.name
  var version = target.version
  while (p && p !== Object.prototype && p[name] !== version) {
    p = Object.getPrototypeOf(p)
  }
  if (p[name] !== version) return cb()

var er = new Error(target._id + ': Unresolvable cycle detected')
  var tree = [target._id, JSON.parse(JSON.stringify(ancestors))]
  var t = Object.getPrototypeOf(ancestors)
  while (t && t !== Object.prototype) {
    if (t === p) t.THIS_IS_P = true
    tree.push(JSON.parse(JSON.stringify(t)))
    t = Object.getPrototypeOf(t)
  }
  er.pkgid = target._id
  er.code = 'ECYCLE'
  return cb(er)
}

exports.checkGit = checkGit
function checkGit (folder, cb) {
  // if it's a git repo then don't touch it!
  fs.lstat(folder, function (er, s) {
    if (er || !s.isDirectory()) return cb()
    else checkGit_(folder, cb)
  })
}

function checkGit_ (folder, cb) {
  fs.stat(path.resolve(folder, '.git'), function (er, s) {
    if (!er && s.isDirectory()) {
      var e = new Error(folder + ': Appears to be a git repo or submodule.')
      e.path = folder
      e.code = 'EISGIT'
      return cb(e)
    }
    cb()
  })
}

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