Code coverage report for tar/lib/mkdir.js

# All files / tar/lib mkdir.js

100% Statements 130/130
100% Branches 91/91
100% Functions 15/15
100% Lines 128/128

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     'use strict'
    // wrapper around mkdirp for tar's needs.

    // TODO: This should probably be a class, not functionally
    // passing around state in a gazillion args.

    const mkdirp = require('mkdirp')
    const fs = require('fs')
    const path = require('path')
    const chownr = require('chownr')

    class SymlinkError extends Error {
      constructor (symlink, path) {
        super('Cannot extract through symbolic link')
        this.path = path
        this.symlink = symlink
      }

      get name () {
        return 'SylinkError'
      }
    }

    class CwdError extends Error {
      constructor (path, code) {
        super(code + ': Cannot cd into \'' + path + '\'')
        this.path = path
        this.code = code
      }

      get name () {
        return 'CwdError'
      }
    }

    const mkdir = module.exports = (dir, opt, cb) => {
      // if there's any overlap between mask and mode,
      // then we'll need an explicit chmod
      const umask = opt.umask
      const mode = opt.mode | 0o0700
      const needChmod = (mode & umask) !== 0

      const uid = opt.uid
      const gid = opt.gid
      const doChown = typeof uid === 'number' &&
        typeof gid === 'number' &&
        ( uid !== opt.processUid || gid !== opt.processGid )

      const preserve = opt.preserve
      const unlink = opt.unlink
      const cache = opt.cache
      const cwd = opt.cwd

      const done = (er, created) => {
        if (er)
          cb(er)
        else {
          cache.set(dir, true)
          if (created && doChown)
            chownr(created, uid, gid, er => done(er))
          else if (needChmod)
            fs.chmod(dir, mode, cb)
          else
            cb()
        }
      }

      if (cache && cache.get(dir) === true)
        return done()

      if (dir === cwd)
        return fs.lstat(dir, (er, st) => {
          if (er || !st.isDirectory())
            er = new CwdError(dir, er && er.code || 'ENOTDIR')
          done(er)
        })

      if (preserve)
        return mkdirp(dir, mode, done)

      const sub = path.relative(cwd, dir)
      const parts = sub.split(/\/|\\/)
      mkdir_(cwd, parts, mode, cache, unlink, cwd, null, done)
    }

    const mkdir_ = (base, parts, mode, cache, unlink, cwd, created, cb) => {
      if (!parts.length)
        return cb(null, created)
      const p = parts.shift()
      const part = base + '/' + p
      if (cache.get(part))
        return mkdir_(part, parts, mode, cache, unlink, cwd, created, cb)
      fs.mkdir(part, mode, onmkdir(part, parts, mode, cache, unlink, cwd, created, cb))
    }

    const onmkdir = (part, parts, mode, cache, unlink, cwd, created, cb) => er => {
      if (er) {
        if (er.path && path.dirname(er.path) === cwd &&
            (er.code === 'ENOTDIR' || er.code === 'ENOENT'))
          return cb(new CwdError(cwd, er.code))

        fs.lstat(part, (statEr, st) => {
          if (statEr)
            cb(statEr)
          else if (st.isDirectory())
            mkdir_(part, parts, mode, cache, unlink, cwd, created, cb)
          else if (unlink)
            fs.unlink(part, er => {
              if (er)
                return cb(er)
              fs.mkdir(part, mode, onmkdir(part, parts, mode, cache, unlink, cwd, created, cb))
            })
          else if (st.isSymbolicLink())
            return cb(new SymlinkError(part, part + '/' + parts.join('/')))
          else
            cb(er)
        })
      } else {
        created = created || part
        mkdir_(part, parts, mode, cache, unlink, cwd, created, cb)
      }
    }

    const mkdirSync = module.exports.sync = (dir, opt) => {
      // if there's any overlap between mask and mode,
      // then we'll need an explicit chmod
      const umask = opt.umask
      const mode = opt.mode | 0o0700
      const needChmod = (mode & umask) !== 0

      const uid = opt.uid
      const gid = opt.gid
      const doChown = typeof uid === 'number' &&
        typeof gid === 'number' &&
        ( uid !== opt.processUid || gid !== opt.processGid )

      const preserve = opt.preserve
      const unlink = opt.unlink
      const cache = opt.cache
      const cwd = opt.cwd

      const done = (created) => {
        cache.set(dir, true)
        if (created && doChown)
          chownr.sync(created, uid, gid)
        if (needChmod)
          fs.chmodSync(dir, mode)
        cache.set(dir, true)
      }

      if (cache && cache.get(dir) === true)
        return done()

      if (dir === cwd) {
        let ok = false
        let code = 'ENOTDIR'
        try {
          ok = fs.lstatSync(dir).isDirectory()
        } catch (er) {
          code = er.code
        } finally {
          if (!ok)
            throw new CwdError(dir, code)
        }
        done()
        return
      }

      if (preserve)
        return done(mkdirp.sync(dir, mode))

      const sub = path.relative(cwd, dir)
      const parts = sub.split(/\/|\\/)
      let created = null
      for (let p = parts.shift(), part = cwd;
           p && (part += '/' + p);
           p = parts.shift()) {

        if (cache.get(part))
          continue

        try {
          fs.mkdirSync(part, mode)
          created = created || part
          cache.set(part, true)
        } catch (er) {
          if (er.path && path.dirname(er.path) === cwd &&
              (er.code === 'ENOTDIR' || er.code === 'ENOENT'))
            return new CwdError(cwd, er.code)

          const st = fs.lstatSync(part)
          if (st.isDirectory()) {
            cache.set(part, true)
            continue
          } else if (unlink) {
            fs.unlinkSync(part)
            fs.mkdirSync(part, mode)
            created = created || part
            cache.set(part, true)
            continue
          } else if (st.isSymbolicLink())
            return new SymlinkError(part, part + '/' + parts.join('/'))
        }
      }

      return done(created)
    }