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Edit File : finalize.js \| Size : 3.81 KB
'use strict' const path = require('path') const fs = require('graceful-fs') const Bluebird = require('bluebird') const rimraf = Bluebird.promisify(require('rimraf')) const mkdirp = Bluebird.promisify(require('gentle-fs').mkdir) const lstat = Bluebird.promisify(fs.lstat) const readdir = Bluebird.promisify(fs.readdir) const symlink = Bluebird.promisify(fs.symlink) const gentlyRm = Bluebird.promisify(require('../../utils/gently-rm')) const moduleStagingPath = require('../module-staging-path.js') const move = require('move-concurrently') const moveOpts = {fs: fs, Promise: Bluebird, maxConcurrency: 4} const getRequested = require('../get-requested.js') const log = require('npmlog') const packageId = require('../../utils/package-id.js') module.exports = function (staging, pkg, log) { log.silly('finalize', pkg.realpath) const extractedTo = moduleStagingPath(staging, pkg) const delpath = path.join(path.dirname(pkg.realpath), '.' + path.basename(pkg.realpath) + '.DELETE') let movedDestAway = false const requested = pkg.package._requested \|\| getRequested(pkg) if (requested.type === 'directory') { const relative = path.relative(path.dirname(pkg.path), pkg.realpath) return makeParentPath(pkg.path) .then(() => symlink(relative, pkg.path, 'junction')) .catch((ex) => { return rimraf(pkg.path).then(() => symlink(relative, pkg.path, 'junction')) }) } else { return makeParentPath(pkg.realpath) .then(moveStagingToDestination) .then(restoreOldNodeModules) .catch((err) => { if (movedDestAway) { return rimraf(pkg.realpath).then(moveOldDestinationBack).then(() => { throw err }) } else { throw err } }) .then(() => rimraf(delpath)) } function makeParentPath (dir) { return mkdirp(path.dirname(dir)) } function moveStagingToDestination () { return destinationIsClear() .then(actuallyMoveStaging) .catch(() => moveOldDestinationAway().then(actuallyMoveStaging)) } function destinationIsClear () { return lstat(pkg.realpath).then(() => { throw new Error('destination exists') }, () => {}) } function actuallyMoveStaging () { return move(extractedTo, pkg.realpath, moveOpts) } function moveOldDestinationAway () { return rimraf(delpath).then(() => { return move(pkg.realpath, delpath, moveOpts) }).then(() => { movedDestAway = true }) } function moveOldDestinationBack () { return move(delpath, pkg.realpath, moveOpts).then(() => { movedDestAway = false }) } function restoreOldNodeModules () { if (!movedDestAway) return return readdir(path.join(delpath, 'node_modules')).catch(() => []).then((modules) => { if (!modules.length) return return mkdirp(path.join(pkg.realpath, 'node_modules')).then(() => Bluebird.map(modules, (file) => { const from = path.join(delpath, 'node_modules', file) const to = path.join(pkg.realpath, 'node_modules', file) return move(from, to, moveOpts) })) }) } } module.exports.rollback = function (top, staging, pkg) { return Bluebird.try(() => { const requested = pkg.package._requested \|\| getRequested(pkg) if (requested && requested.type === 'directory') return Promise.resolve() // strictly speaking rolling back a finalize should ONLY remove module that // was being finalized, not any of the things under it. But currently // those modules are guaranteed to be useless so we may as well remove them too. // When/if we separate `commit` step and can rollback to previous versions // of upgraded modules then we'll need to revisit this… return gentlyRm(pkg.path, false, top).catch((err) => { log.warn('rollback', `Rolling back ${packageId(pkg)} failed (this is probably harmless): ${err.message ? err.message : err}`) }) }) } Back

Edit File : finalize.js | Size : 3.81 KB

'use strict'
const path = require('path')
const fs = require('graceful-fs')
const Bluebird = require('bluebird')
const rimraf = Bluebird.promisify(require('rimraf'))
const mkdirp = Bluebird.promisify(require('gentle-fs').mkdir)
const lstat = Bluebird.promisify(fs.lstat)
const readdir = Bluebird.promisify(fs.readdir)
const symlink = Bluebird.promisify(fs.symlink)
const gentlyRm = Bluebird.promisify(require('../../utils/gently-rm'))
const moduleStagingPath = require('../module-staging-path.js')
const move = require('move-concurrently')
const moveOpts = {fs: fs, Promise: Bluebird, maxConcurrency: 4}
const getRequested = require('../get-requested.js')
const log = require('npmlog')
const packageId = require('../../utils/package-id.js')

module.exports = function (staging, pkg, log) {
  log.silly('finalize', pkg.realpath)

const extractedTo = moduleStagingPath(staging, pkg)

const delpath = path.join(path.dirname(pkg.realpath), '.' + path.basename(pkg.realpath) + '.DELETE')
  let movedDestAway = false

const requested = pkg.package._requested || getRequested(pkg)
  if (requested.type === 'directory') {
    const relative = path.relative(path.dirname(pkg.path), pkg.realpath)
    return makeParentPath(pkg.path)
      .then(() => symlink(relative, pkg.path, 'junction'))
      .catch((ex) => {
        return rimraf(pkg.path).then(() => symlink(relative, pkg.path, 'junction'))
      })
  } else {
    return makeParentPath(pkg.realpath)
      .then(moveStagingToDestination)
      .then(restoreOldNodeModules)
      .catch((err) => {
        if (movedDestAway) {
          return rimraf(pkg.realpath).then(moveOldDestinationBack).then(() => {
            throw err
          })
        } else {
          throw err
        }
      })
      .then(() => rimraf(delpath))
  }

function makeParentPath (dir) {
    return mkdirp(path.dirname(dir))
  }

function moveStagingToDestination () {
    return destinationIsClear()
      .then(actuallyMoveStaging)
      .catch(() => moveOldDestinationAway().then(actuallyMoveStaging))
  }

function destinationIsClear () {
    return lstat(pkg.realpath).then(() => {
      throw new Error('destination exists')
    }, () => {})
  }

function actuallyMoveStaging () {
    return move(extractedTo, pkg.realpath, moveOpts)
  }

function moveOldDestinationAway () {
    return rimraf(delpath).then(() => {
      return move(pkg.realpath, delpath, moveOpts)
    }).then(() => { movedDestAway = true })
  }

function moveOldDestinationBack () {
    return move(delpath, pkg.realpath, moveOpts).then(() => { movedDestAway = false })
  }

function restoreOldNodeModules () {
    if (!movedDestAway) return
    return readdir(path.join(delpath, 'node_modules')).catch(() => []).then((modules) => {
      if (!modules.length) return
      return mkdirp(path.join(pkg.realpath, 'node_modules')).then(() => Bluebird.map(modules, (file) => {
        const from = path.join(delpath, 'node_modules', file)
        const to = path.join(pkg.realpath, 'node_modules', file)
        return move(from, to, moveOpts)
      }))
    })
  }
}

module.exports.rollback = function (top, staging, pkg) {
  return Bluebird.try(() => {
    const requested = pkg.package._requested || getRequested(pkg)
    if (requested && requested.type === 'directory') return Promise.resolve()
    // strictly speaking rolling back a finalize should ONLY remove module that
    // was being finalized, not any of the things under it. But currently
    // those modules are guaranteed to be useless so we may as well remove them too.
    // When/if we separate `commit` step and can rollback to previous versions
    // of upgraded modules then we'll need to revisit this…
    return gentlyRm(pkg.path, false, top).catch((err) => {
      log.warn('rollback', `Rolling back ${packageId(pkg)} failed (this is probably harmless): ${err.message ? err.message : err}`)
    })
  })
}

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