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node_modules/mkdirp/readme.markdown
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# mkdirp
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Like `mkdir -p`, but in Node.js!
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Now with a modern API and no\* bugs!
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<small>\* may contain some bugs</small>
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# example
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## pow.js
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```js
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// hybrid module, import or require() both work
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import { mkdirp } from 'mkdirp'
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// or:
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const { mkdirp } = require('mkdirp')
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// return value is a Promise resolving to the first directory created
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mkdirp('/tmp/foo/bar/baz').then(made =>
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console.log(`made directories, starting with ${made}`)
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)
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```
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Output (where `/tmp/foo` already exists)
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```
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made directories, starting with /tmp/foo/bar
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```
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Or, if you don't have time to wait around for promises:
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```js
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import { mkdirp } from 'mkdirp'
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// return value is the first directory created
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const made = mkdirp.sync('/tmp/foo/bar/baz')
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console.log(`made directories, starting with ${made}`)
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```
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And now /tmp/foo/bar/baz exists, huzzah!
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# methods
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```js
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import { mkdirp } from 'mkdirp'
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```
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## `mkdirp(dir: string, opts?: MkdirpOptions) => Promise<string | undefined>`
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Create a new directory and any necessary subdirectories at `dir`
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with octal permission string `opts.mode`. If `opts` is a string
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or number, it will be treated as the `opts.mode`.
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If `opts.mode` isn't specified, it defaults to `0o777`.
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Promise resolves to first directory `made` that had to be
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created, or `undefined` if everything already exists. Promise
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rejects if any errors are encountered. Note that, in the case of
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promise rejection, some directories _may_ have been created, as
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recursive directory creation is not an atomic operation.
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You can optionally pass in an alternate `fs` implementation by
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passing in `opts.fs`. Your implementation should have
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`opts.fs.mkdir(path, opts, cb)` and `opts.fs.stat(path, cb)`.
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You can also override just one or the other of `mkdir` and `stat`
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by passing in `opts.stat` or `opts.mkdir`, or providing an `fs`
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option that only overrides one of these.
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## `mkdirp.sync(dir: string, opts: MkdirpOptions) => string|undefined`
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Synchronously create a new directory and any necessary
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subdirectories at `dir` with octal permission string `opts.mode`.
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If `opts` is a string or number, it will be treated as the
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`opts.mode`.
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If `opts.mode` isn't specified, it defaults to `0o777`.
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Returns the first directory that had to be created, or undefined
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if everything already exists.
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You can optionally pass in an alternate `fs` implementation by
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passing in `opts.fs`. Your implementation should have
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`opts.fs.mkdirSync(path, mode)` and `opts.fs.statSync(path)`.
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You can also override just one or the other of `mkdirSync` and
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`statSync` by passing in `opts.statSync` or `opts.mkdirSync`, or
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providing an `fs` option that only overrides one of these.
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## `mkdirp.manual`, `mkdirp.manualSync`
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Use the manual implementation (not the native one). This is the
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default when the native implementation is not available or the
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stat/mkdir implementation is overridden.
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## `mkdirp.native`, `mkdirp.nativeSync`
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Use the native implementation (not the manual one). This is the
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default when the native implementation is available and
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stat/mkdir are not overridden.
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# implementation
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On Node.js v10.12.0 and above, use the native `fs.mkdir(p,
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{recursive:true})` option, unless `fs.mkdir`/`fs.mkdirSync` has
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been overridden by an option.
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## native implementation
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- If the path is a root directory, then pass it to the underlying
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implementation and return the result/error. (In this case,
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it'll either succeed or fail, but we aren't actually creating
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any dirs.)
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- Walk up the path statting each directory, to find the first
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path that will be created, `made`.
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- Call `fs.mkdir(path, { recursive: true })` (or `fs.mkdirSync`)
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- If error, raise it to the caller.
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- Return `made`.
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## manual implementation
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- Call underlying `fs.mkdir` implementation, with `recursive:
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false`
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- If error:
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- If path is a root directory, raise to the caller and do not
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handle it
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- If ENOENT, mkdirp parent dir, store result as `made`
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- stat(path)
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- If error, raise original `mkdir` error
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- If directory, return `made`
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- Else, raise original `mkdir` error
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- else
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- return `undefined` if a root dir, or `made` if set, or `path`
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## windows vs unix caveat
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On Windows file systems, attempts to create a root directory (ie,
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a drive letter or root UNC path) will fail. If the root
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directory exists, then it will fail with `EPERM`. If the root
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directory does not exist, then it will fail with `ENOENT`.
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On posix file systems, attempts to create a root directory (in
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recursive mode) will succeed silently, as it is treated like just
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another directory that already exists. (In non-recursive mode,
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of course, it fails with `EEXIST`.)
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In order to preserve this system-specific behavior (and because
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it's not as if we can create the parent of a root directory
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anyway), attempts to create a root directory are passed directly
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to the `fs` implementation, and any errors encountered are not
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handled.
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## native error caveat
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The native implementation (as of at least Node.js v13.4.0) does
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not provide appropriate errors in some cases (see
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[nodejs/node#31481](https://github.com/nodejs/node/issues/31481)
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and
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[nodejs/node#28015](https://github.com/nodejs/node/issues/28015)).
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In order to work around this issue, the native implementation
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will fall back to the manual implementation if an `ENOENT` error
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is encountered.
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# choosing a recursive mkdir implementation
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There are a few to choose from! Use the one that suits your
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needs best :D
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## use `fs.mkdir(path, {recursive: true}, cb)` if:
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- You wish to optimize performance even at the expense of other
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factors.
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- You don't need to know the first dir created.
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- You are ok with getting `ENOENT` as the error when some other
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problem is the actual cause.
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- You can limit your platforms to Node.js v10.12 and above.
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- You're ok with using callbacks instead of promises.
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- You don't need/want a CLI.
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- You don't need to override the `fs` methods in use.
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## use this module (mkdirp 1.x or 2.x) if:
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- You need to know the first directory that was created.
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- You wish to use the native implementation if available, but
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fall back when it's not.
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- You prefer promise-returning APIs to callback-taking APIs.
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- You want more useful error messages than the native recursive
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mkdir provides (at least as of Node.js v13.4), and are ok with
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re-trying on `ENOENT` to achieve this.
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- You need (or at least, are ok with) a CLI.
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- You need to override the `fs` methods in use.
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## use [`make-dir`](http://npm.im/make-dir) if:
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- You do not need to know the first dir created (and wish to save
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a few `stat` calls when using the native implementation for
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this reason).
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- You wish to use the native implementation if available, but
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fall back when it's not.
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- You prefer promise-returning APIs to callback-taking APIs.
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- You are ok with occasionally getting `ENOENT` errors for
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failures that are actually related to something other than a
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missing file system entry.
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- You don't need/want a CLI.
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- You need to override the `fs` methods in use.
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## use mkdirp 0.x if:
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- You need to know the first directory that was created.
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- You need (or at least, are ok with) a CLI.
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- You need to override the `fs` methods in use.
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- You're ok with using callbacks instead of promises.
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- You are not running on Windows, where the root-level ENOENT
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errors can lead to infinite regress.
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- You think vinyl just sounds warmer and richer for some weird
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reason.
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- You are supporting truly ancient Node.js versions, before even
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the advent of a `Promise` language primitive. (Please don't.
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You deserve better.)
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# cli
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This package also ships with a `mkdirp` command.
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```
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$ mkdirp -h
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usage: mkdirp [DIR1,DIR2..] {OPTIONS}
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Create each supplied directory including any necessary parent directories
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that don't yet exist.
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If the directory already exists, do nothing.
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OPTIONS are:
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-m<mode> If a directory needs to be created, set the mode as an octal
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--mode=<mode> permission string.
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-v --version Print the mkdirp version number
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-h --help Print this helpful banner
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-p --print Print the first directories created for each path provided
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--manual Use manual implementation, even if native is available
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```
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# install
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With [npm](http://npmjs.org) do:
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```
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npm install mkdirp
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```
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to get the library locally, or
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```
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npm install -g mkdirp
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```
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to get the command everywhere, or
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```
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npx mkdirp ...
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```
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to run the command without installing it globally.
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# platform support
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This module works on node v8, but only v10 and above are officially
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supported, as Node v8 reached its LTS end of life 2020-01-01, which is in
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the past, as of this writing.
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# license
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MIT
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