`bun create`

备注

Note — You don’t need bun create to use Bun. You don’t need any configuration at all. This command exists to make getting started a bit quicker and easier.

Template a new Bun project with bun create. This is a flexible command that can be used to create a new project with a create-<template> npm package, a GitHub repo, or a local template.

If you're looking to create a brand new empty project, use bun init.

From `npm`

$ bun create <template> [<destination>]

Assuming you don't have a local template with the same name, this command will download and execute the create-<template> package from npm. The following two commands will behave identically:

$ bun create remix
$ bunx create-remix

Refer to the documentation of the associated create-<template> package for complete documentation and usage instructions.

From GitHub

This will download the contents of the GitHub repo to disk.

$ bun create <user>/<repo>
$ bun create github.com/<user>/<repo>

Optionally specify a name for the destination folder. If no destination is specified, the repo name will be used.

$ bun create <user>/<repo> mydir
$ bun create github.com/<user>/<repo> mydir

Bun will perform the following steps:

Download the template
Copy all template files into the destination folder
Install dependencies with bun install.
Initialize a fresh Git repo. Opt out with the --no-git flag.
Run the template's configured start script, if defined.

备注

By default Bun will not overwrite any existing files. Use the --force flag to overwrite existing files.

From a local template

备注

⚠️ Warning — Unlike remote templates, running bun create with a local template will delete the entire destination folder if it already exists! Be careful.

Bun's templater can be extended to support custom templates defined on your local file system. These templates should live in one of the following directories:

$HOME/.bun-create/<name>: global templates
<project root>/.bun-create/<name>: project-specific templates

备注

Note — You can customize the global template path by setting the BUN_CREATE_DIR environment variable.

To create a local template, navigate to $HOME/.bun-create and create a new directory with the desired name of your template.

$ cd $HOME/.bun-create
$ mkdir foo
$ cd foo

Then, create a package.json file in that directory with the following contents:

{
  "name": "foo"
}

You can run bun create foo elsewhere on your file system to verify that Bun is correctly finding your local template.

Setup logic

You can specify pre- and post-install setup scripts in the "bun-create" section of your local template's package.json.

{
  "name": "@bun-examples/simplereact",
  "version": "0.0.1",
  "main": "index.js",
  "dependencies": {
    "react": "^17.0.2",
    "react-dom": "^17.0.2"
  },
  "bun-create": {
    "preinstall": "echo 'Installing...'", // a single command
    "postinstall": ["echo 'Done!'"], // an array of commands
    "start": "bun run echo 'Hello world!'"
  }
}

The following fields are supported. Each of these can correspond to a string or array of strings. An array of commands will be executed in order.

After cloning a template, bun create will automatically remove the "bun-create" section from package.json before writing it to the destination folder.

Reference

CLI flags

Environment variables

How bun create works

When you run bun create ${template} ${destination}, here’s what happens:

IF remote template

GET registry.npmjs.org/@bun-examples/${template}/latest and parse it
GET registry.npmjs.org/@bun-examples/${template}/-/${template}-${latestVersion}.tgz
Decompress & extract ${template}-${latestVersion}.tgz into ${destination}
- If there are files that would overwrite, warn and exit unless --force is passed

IF GitHub repo

Download the tarball from GitHub’s API
Decompress & extract into ${destination}
- If there are files that would overwrite, warn and exit unless --force is passed

ELSE IF local template

Open local template folder
Delete destination directory recursively
Copy files recursively using the fastest system calls available (on macOS fcopyfile and Linux, copy_file_range). Do not copy or traverse into node_modules folder if exists (this alone makes it faster than cp)
Parse the package.json (again!), update name to be ${basename(destination)}, remove the bun-create section from the package.json and save the updated package.json to disk.
- IF Next.js is detected, add bun-framework-next to the list of dependencies
- IF Create React App is detected, add the entry point in /src/index.{js,jsx,ts,tsx} to public/index.html
- IF Relay is detected, add bun-macro-relay so that Relay works
Auto-detect the npm client, preferring pnpm, yarn (v1), and lastly npm
Run any tasks defined in "bun-create": { "preinstall" } with the npm client
Run ${npmClient} install unless --no-install is passed OR no dependencies are in package.json
Run any tasks defined in "bun-create": { "postinstall" } with the npm client
Run git init; git add -A .; git commit -am "Initial Commit";
- Rename gitignore to .gitignore. NPM automatically removes .gitignore files from appearing in packages.
- If there are dependencies, this runs in a separate thread concurrently while node_modules are being installed
- Using libgit2 if available was tested and performed 3x slower in microbenchmarks

From npm​

From GitHub​

From a local template​

Setup logic​

Reference​

CLI flags​

Environment variables​