vm.zsh

Better runtime version management

Most language runtimes have version managers that allow you to install and switch between different runtime versions via the CLI. This is much more convenient than manually installing runtimes and is less likely to corrupt your system.

So why should you use vm.zsh?

• Consistent CLI. If you're working with multiple version managers it is difficult to remember each tool's idiosyncrasies. vm.zsh enhances several common version managers with a unified interface for the most common operations: list, use, install, and uninstall.
• Fast startup. Many version managers must be initialized before they can be used. This initialization is usually done in your .bash_profile or .zshrc and as a result increases the time it takes to load a new shell/terminal (by up to several seconds). vm.zsh solves this problem by (1) lazy loading the version managers and (2) using the default/latest version of each runtime whenever a shell is created.

Install

curl -o- https://raw.githubusercontent.com/Hopding/vm.zsh/master/vm.zsh > ~/.vm.zsh
echo 'source ~/.vm.zsh' >> ~/.zshrc

Usage

  Usage: <vm> [command] [args]

  Variants:

    jvm                         Java (https://sdkman.io/)
    nvm                         Node (https://github.com/nvm-sh/nvm)
    pvm                         Python (https://github.com/pyenv/pyenv)
    gvm                         Go (https://github.com/stefanmaric/g)
    rvm                         Ruby (https://rvm.io/)

  Commands:

    <vm> list                   List installed versions of runtime
    <vm> use <version>          Use a specific version of runtime
    <vm> install <version>      Install a specific version of runtime
    <vm> install list           List all installable versions of runtime
    <vm> uninstall <version>    Uninstall a specific version of runtime

  Examples:

    jvm install 11.0.2-open
    rvm install list
    nvm use v9.8.0
    pvm install 3.9.5
    nvm install 12
    gvm install list
    rvm uninstall ruby-2.7.2

Version Manager Versions

vm.zsh has been tested with the following version manager versions:

• nvm - v0.38.0
• sdk - v5.11.6
• pyenv - v2.0.2
• g - v0.9.0
• rvm - v1.29.12

References

These articles and examples were useful references when creating this script:

• https://frederic-hemberger.de/notes/shell/speed-up-initial-zsh-startup-with-lazy-loading/
• https://github.com/lukechilds/zsh-nvm/blob/23067bd9bb6eb6f4737a3ea90cb0cb5e85f61ba2/zsh-nvm.plugin.zsh#L5-L9