* first action! (#1)

node_modules/tar/lib/mkdir.js

@@ -0,0 +1,206 @@
+'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.stat(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)
+  }
+
+  if (cache && cache.get(dir) === true)
+    return done()
+
+  if (dir === cwd) {
+    let ok = false
+    let code = 'ENOTDIR'
+    try {
+      ok = fs.statSync(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)
+}