readme.markdown



mkdirp

Like mkdir -p, but in Node.js!

Now with a modern API and no* bugs!

* may contain some bugs


example


pow.js

const mkdirp = require('mkdirp')

// return value is a Promise resolving to the first directory created
mkdirp('/tmp/foo/bar/baz').then(made =>
  console.log(`made directories, starting with ${made}`))


Output (where /tmp/foo already exists)

made directories, starting with /tmp/foo/bar


Or, if you don't have time to wait around for promises:

const mkdirp = require('mkdirp')

// return value is the first directory created
const made = mkdirp.sync('/tmp/foo/bar/baz')
console.log(`made directories, starting with ${made}`)


And now /tmp/foo/bar/baz exists, huzzah!


methods

const mkdirp = require('mkdirp')


mkdirp(dir, [opts]) -> Promise

Create a new directory and any necessary subdirectories at dir with octal
permission string opts.mode. If opts is a string or number, it will be
treated as the opts.mode.

If opts.mode isn't specified, it defaults to 0o777 &
(~process.umask()).

Promise resolves to first directory made that had to be created, or
undefined if everything already exists.  Promise rejects if any errors
are encountered.  Note that, in the case of promise rejection, some
directories may have been created, as recursive directory creation is not
an atomic operation.

You can optionally pass in an alternate fs implementation by passing in
opts.fs. Your implementation should have opts.fs.mkdir(path, opts, cb)
and opts.fs.stat(path, cb).

You can also override just one or the other of mkdir and stat by
passing in opts.stat or opts.mkdir, or providing an fs option that
only overrides one of these.


mkdirp.sync(dir, opts) -> String|null

Synchronously create a new directory and any necessary subdirectories at
dir with octal permission string opts.mode. If opts is a string or
number, it will be treated as the opts.mode.

If opts.mode isn't specified, it defaults to 0o777 &
(~process.umask()).

Returns the first directory that had to be created, or undefined if
everything already exists.

You can optionally pass in an alternate fs implementation by passing in
opts.fs. Your implementation should have opts.fs.mkdirSync(path, mode)
and opts.fs.statSync(path).

You can also override just one or the other of mkdirSync and statSync
by passing in opts.statSync or opts.mkdirSync, or providing an fs
option that only overrides one of these.


mkdirp.manual, mkdirp.manualSync

Use the manual implementation (not the native one).  This is the default
when the native implementation is not available or the stat/mkdir
implementation is overridden.


mkdirp.native, mkdirp.nativeSync

Use the native implementation (not the manual one).  This is the default
when the native implementation is available and stat/mkdir are not
overridden.


implementation

On Node.js v10.12.0 and above, use the native fs.mkdir(p,
{recursive:true}) option, unless fs.mkdir/fs.mkdirSync has been
overridden by an option.


native implementation


If the path is a root directory, then pass it to the underlying
implementation and return the result/error.  (In this case, it'll either
succeed or fail, but we aren't actually creating any dirs.)
Walk up the path statting each directory, to find the first path that
will be created, made.
Call fs.mkdir(path, { recursive: true }) (or fs.mkdirSync)
If error, raise it to the caller.
Return made.


manual implementation


Call underlying fs.mkdir implementation, with recursive: false

If error:


If path is a root directory, raise to the caller and do not handle it
If ENOENT, mkdirp parent dir, store result as made

stat(path)
If error, raise original mkdir error
If directory, return made

Else, raise original mkdir error


else


return undefined if a root dir, or made if set, or path


windows vs unix caveat

On Windows file systems, attempts to create a root directory (ie, a drive
letter or root UNC path) will fail.  If the root directory exists, then it
will fail with EPERM.  If the root directory does not exist, then it will
fail with ENOENT.

On posix file systems, attempts to create a root directory (in recursive
mode) will succeed silently, as it is treated like just another directory
that already exists.  (In non-recursive mode, of course, it fails with
EEXIST.)

In order to preserve this system-specific behavior (and because it's not as
if we can create the parent of a root directory anyway), attempts to create
a root directory are passed directly to the fs implementation, and any
errors encountered are not handled.


native error caveat

The native implementation (as of at least Node.js v13.4.0) does not provide
appropriate errors in some cases (see
nodejs/node#31481 and
nodejs/node#28015).

In order to work around this issue, the native implementation will fall
back to the manual implementation if an ENOENT error is encountered.


choosing a recursive mkdir implementation

There are a few to choose from!  Use the one that suits your needs best :D


use fs.mkdir(path, {recursive: true}, cb) if:


You wish to optimize performance even at the expense of other factors.
You don't need to know the first dir created.
You are ok with getting ENOENT as the error when some other problem is
the actual cause.
You can limit your platforms to Node.js v10.12 and above.
You're ok with using callbacks instead of promises.
You don't need/want a CLI.
You don't need to override the fs methods in use.


use this module (mkdirp 1.x) if:


You need to know the first directory that was created.
You wish to use the native implementation if available, but fall back
when it's not.
You prefer promise-returning APIs to callback-taking APIs.
You want more useful error messages than the native recursive mkdir
provides (at least as of Node.js v13.4), and are ok with re-trying on
ENOENT to achieve this.
You need (or at least, are ok with) a CLI.
You need to override the fs methods in use.


use make-dir if:


You do not need to know the first dir created (and wish to save a few
stat calls when using the native implementation for this reason).
You wish to use the native implementation if available, but fall back
when it's not.
You prefer promise-returning APIs to callback-taking APIs.
You are ok with occasionally getting ENOENT errors for failures that
are actually related to something other than a missing file system entry.
You don't need/want a CLI.
You need to override the fs methods in use.


use mkdirp 0.x if:


You need to know the first directory that was created.
You need (or at least, are ok with) a CLI.
You need to override the fs methods in use.
You're ok with using callbacks instead of promises.
You are not running on Windows, where the root-level ENOENT errors can
lead to infinite regress.
You think vinyl just sounds warmer and richer for some weird reason.
You are supporting truly ancient Node.js versions, before even the advent
of a Promise language primitive.  (Please don't.  You deserve better.)


cli

This package also ships with a mkdirp command.

$ mkdirp -h

usage: mkdirp [DIR1,DIR2..] {OPTIONS}

  Create each supplied directory including any necessary parent directories
  that don't yet exist.

  If the directory already exists, do nothing.

OPTIONS are:

  -m<mode>       If a directory needs to be created, set the mode as an octal
  --mode=<mode>  permission string.

  -v --version   Print the mkdirp version number

  -h --help      Print this helpful banner

  -p --print     Print the first directories created for each path provided

  --manual       Use manual implementation, even if native is available


install

With npm do:

npm install mkdirp


to get the library locally, or

npm install -g mkdirp


to get the command everywhere, or

npx mkdirp ...


to run the command without installing it globally.


platform support

This module works on node v8, but only v10 and above are officially
supported, as Node v8 reached its LTS end of life 2020-01-01, which is in
the past, as of this writing.


license

MIT