Multibun

A version manager for Bun.

Installation

Multibun is a command line tool that can be installed globally using npm (or your preferred package manager).

npm install -g multibun

Usage

Multibun is a command line tool that can be used to manage multiple versions of Bun. It can be used to install, list, switch between and run different versions of Bun.

Installing Bun Versions

To install a specific version of Bun, use the install command followed by the version number.

multibun install 1.0.0

You can also install the latest version of Bun by specifying the latest keyword.

multibun install latest

To download a range of versions, use the --from and --to flags.

# install all versions after v0.6.0
multibun install --from 0.6.0

# install all versions between v0.6.0 and v1.0.0
multibun install --from 0.6.0 --to 1.0.0

Listing Versions

To list all installed versions of Bun, use the list command (or ls for short).

multibun list

This will display a list of all the versions of Bun that are currently installed.

To list all versions of Bun available to install, use the list-remote command (or lsr for short).

multibun list-remote

Switching Between Versions

To switch between installed versions of Bun, use the use command followed by the version number.

multibun use 1.0.0

This will update the bun executable to point to the specified version.

Note: if you had previously installed Bun globally, you may need to uninstall it first, or use the --overwrite flag to overwrite the existing installation. This is only necessary the first time when switching from a global installation to a version managed by Multibun.

multibun use 1.0.0 --overwrite

Running Bun

If you want to run a specific version of Bun, you can use the use command as described above, and then run the bun command as you normally would.

multibun use 1.1.0
bun --version # should output 1.1.0

Alternatively, you can use the run command to run a specific version of Bun without switching the global version.

multibun run -V 1.1.0 -- --version # should output 1.1.0

The most notable use case for the run command, however, is that it can be used to run several versions of Bun at once.

multibun run --from 1.1.0 --to 1.1.10 -- --revision

This can be useful for testing libraries or applications against multiple versions of Bun. It could also aid in debugging issues that may be specific to a certain version of Bun.

Multibun can also generate pretty reports with the results of the Bun processes in a run command.

multibun run --from 1.1.0 --to 1.1.10 -n --html myreport.html -- --revision