website/lang/en/docs/cli/init.md

---
id: docs_cli_init
guide: docs_cli
layout: guide
---

{% include vars.html %}

<p class="lead">Interactively creates or updates a package.json file.</p>

##### `yarn init` <a class="toc" id="toc-yarn-init" href="#toc-yarn-init"></a>

This command walks you through an interactive session to create a
`package.json` file. Some defaults such as the license and initial version are
found in yarn's `init-*` config settings.

Here's an example of running the command inside of a directory named `testdir`:

```sh
$ yarn init
```

```sh
question name (testdir): my-awesome-package
question version (1.0.0):
question description: The best package you will ever find.
question entry point (index.js):
question git repository: https://github.com/yarnpkg/example-yarn-package
question author: Yarn Contributor
question license (MIT):
question private:
success Saved package.json
✨  Done in 87.70s.
```

This results in the following `package.json`:

```json
{
  "name": "my-awesome-package",
  "version": "1.0.0",
  "description": "The best package you will ever find.",
  "main": "index.js",
  "repository": {
    "url": "https://github.com/yarnpkg/example-yarn-package",
    "type": "git"
  },
  "author": "Yarn Contributor",
  "license": "MIT"
}
```

> By default, if answer given to `question private` is passed in as empty, the `private` key will not be added to `package.json`

If you already have an existing `package.json` file, then it will use the
file's entries as defaults.

The following existing `package.json`:

```json
{
  "name": "my-existing-package",
  "version": "0.1",
  "description": "I exist therefore I am.",
  "repository": {
    "url": "https://github.com/yarnpkg/example-yarn-package",
    "type": "git"
  },
  "license": "BSD-2-Clause"
}
```

Results in the following defaults during the interactive session:

```sh
$ yarn init
```

```sh
question name (my-existing-package):
question version (0.1):
question description (I exist therefore I am.):
question entry point (index.js):
question git repository (https://github.com/yarnpkg/example-yarn-package):
question author: Yarn Contributor
question license (BSD-2-Clause):
question private:
success Saved package.json
✨  Done in 121.53s.
```

##### Setting defaults for `yarn init` <a class="toc" id="toc-setting-defaults-for-yarn-init" href="#toc-setting-defaults-for-yarn-init"></a>

The following [config]({{url_base}}/docs/cli/config) variables can be used to
customize the defaults for `yarn init`:

- `init-author-name`
- `init-author-email`
- `init-author-url`
- `init-version`
- `init-license`
  <!--- `init-private` waiting for https://github.com/yarnpkg/yarn/pull/4377 -->

##### `yarn init --yes/-y` <a class="toc" id="toc-yarn-init-yes-y" href="#toc-yarn-init-yes-y"></a>

This command skips the interactive session mentioned above and generates a
`package.json` based on your defaults. Some defaults may be modified changing
`init-*` config settings like mentioned above. For example, given a fresh
install of Yarn and inside a `yarn-example` directory:

```sh
$ yarn init --yes
```

```
warning The yes flag has been set. This will automatically answer yes to all questions which may have security implications.
success Saved package.json
✨  Done in 0.09s.
```

Which produces the following `package.json`:

```json
{
  "name": "yarn-example",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT"
}
```

##### `yarn init --private/-p` <a class="toc" id="toc-yarn-init-private-p" href="#toc-yarn-init-private-p"></a>

> automatically add `private: true` to the `package.json`

```sh
$ yarn init --private
```

If the `private` flag is set, the `private` key will be automatically set to `true` and you still complete the rest of the init process.

```sh
question name (testdir): my-awesome-package
question version (1.0.0):
question description: The best package you will ever find.
question entry point (index.js):
question git repository: https://github.com/yarnpkg/example-yarn-package
question author: Yarn Contributor
question license (MIT):
success Saved package.json
✨  Done in 87.70s.
```

```json
{
  "name": "my-awesome-package",
  "version": "1.0.0",
  "description": "The best package you will ever find.",
  "main": "index.js",
  "repository": {
    "url": "https://github.com/yarnpkg/example-yarn-package",
    "type": "git"
  },
  "author": "Yarn Contributor",
  "license": "MIT",
  "private": true
}
```

**You can use both the `yes` and the `private` flags at the same time**

Like this:

```sh
$ yarn init -yp
```

```
warning The yes flag has been set. This will automatically answer yes to all questions which may have security implications.
success Saved package.json
✨  Done in 0.05s.
```

Which produces the following `package.json`:

```json
{
  "name": "yarn-example",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "private": true
}
```