asdf

Manage multiple runtime versions with a single CLI tool, extendable via plugins - docs at asdf-vm.com

asdf is a CLI tool that can manage multiple language runtime versions on a per-project basis. It is like gvm, nvm, rbenv & pyenv (and more) all in one! Simply install your language's plugin!

Why use asdf?

single CLI for multiple languages
consistent commands to manage all your languages
single global config keeping defaults in one place
single .tool-versions config file per project
support for existing config files .node-version, .nvmrc, .ruby-version for easy migration
automatically switches runtime versions as you traverse your directories
simple plugin system to add support for your language of choice
shell completion available for common shells (Bash, Zsh, Fish)

Documentation

Please head over to the documentation site for more information!

Getting Started
All Commands
All Plugins
Create a Plugin with our asdf-plugin-template
asdf GitHub Actions

Contributing

See CONTRIBUTING.md in the repo or the Contributing section on the docs site.

Community & Questions

FAQ
GitHub Issues: report a bug or raise a feature request to the asdf core team
GitHub Discussions: our preferred method for community Q&A and interaction
StackOverflow Tag: see existing Q&A for asdf. Some of the core team watch this tag in addition to our helpful community

Ballad of asdf

Once upon a time there was a programming language
There were many versions of it
So people wrote a version manager for it
To switch between versions for projects
Different, old, new.

Then there came more programming languages
So there came more version managers
And many commands for them

I installed a lot of them
I learnt a lot of commands

Then I said, just one more version manager
Which I will write instead

So, there came another version manager
asdf version manager - https://github.com/asdf-vm/asdf

A version manager so extendable
for which anyone can create a plugin
To support their favourite language
No more installing more version managers
Or learning more commands

This was the mail I wrote to a few friends to tell them about the project. Thanks to @roshanvid for suggesting that this go into the readme