zvm

README

Zig Version Manager (zvm) is a tool for managing your Zig installs. With std under heavy development and a large feature roadmap, Zig is bound to continue changing. Breaking existing builds, updating valid syntax, and introducing new features like a package manager. While this is great for developers, it also can lead to headaches when you need multiple versions of a language installed to compile your projects, or a language gets updated frequently.

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Installing ZVM

ZVM lives entirely in $HOME/.zvm on all platforms it supports. Inside of the directory, ZVM will download new ZIG versions and symlink whichever version you specify with zvm use to $HOME/.zvm/bin. You should add this folder to your path. After ZVM 0.2.3, ZVM's installer will now add ZVM to $HOME/.zvm/self. You should also add this directory as the environment variable ZVM_INSTALL. The installer scripts should handle this for you automatically on *nix and Windows systems.

If you don't want to use ZVM_INSTALL (like you already have ZVM in a place you like), then ZVM will update the exact executable you've called upgrade from.

Linux, BSD, MacOS, *nix

curl https://raw.githubusercontent.com/tristanisham/zvm/master/install.sh | bash
# Or
go install -ldflags "-s -w" github.com/tristanisham/zvm@latest

Windows

PowerShell

irm https://raw.githubusercontent.com/tristanisham/zvm/master/install.ps1 | iex

Command Prompt

powershell -c "irm https://raw.githubusercontent.com/tristanisham/zvm/master/install.ps1 | iex"

Manually

Please grab the latest release.

Putting ZVM on your Path

ZVM requires a few directories to be on your $PATH. If you don't know how to update your environment variables perminantly on Windows, you can follow this guide. Once you're in the appropriate menu, add or append to the following environment variables:

Add

• ZVM_INSTALL: %USERPROFILE%\.zvm\self

Append

• PATH: %USERPROFILE%\.zvm\bin
• PATH: %ZVM_INSTALL%

Configure ZVM path

It is possible to overwrite the default behavior of ZVM to adhere to XDG specification on Linux. There's an environment variable ZVM_PATH. Setting it to $XDG_DATA_HOME/zvm will do the trick.

Community Package

AUR

zvm on the Arch AUR is a community-maintained package, and may be out of date.

Why should I use ZVM?

While Zig is still pre-1.0 if you're going to stay up-to-date with the master branch, you're going to be downloading Zig quite often. You could do it manually, having to scoll around to find your appropriate version, decompress it, and install it on your $PATH. Or, you could install ZVM and run zvm i master every time you want to update. zvm is a static binary under a permissive license. It supports more platforms than any other Zig version manager. Its only dependency is tar on Unix-based systems. Whether you're on Windows, MacOS, Linux, a flavor of BSD, or Plan 9 zvm will let you install, switch between, and run multiple versions of Zig.

Contributing and Notice

zvm is stable software. Pre-v1.0.0 any breaking changes will be clearly labeled, and any commands potentially on the chopping block will print notice. The program is under constant development, and the author is very willing to work with contributors. If you have any issues, ideas, or contributions you'd like to suggest create a GitHub issue.

How to use ZVM

Install

zvm install <version> 
# Or
zvm i <version>

Use install or i to download a specific version of Zig. To install the latest version, use "master".

# Example
zvm i master

Force Install

As of v0.7.6 ZVM will now skip downloading a version if it is already installed. You can always force an install with the --force or -f flag.

zvm i --force master

You can also enable the old behavior by setting the new alwaysForceInstall field to true in ~/.zvm/settings.json.

Install ZLS with ZVM

You can now install ZLS with your Zig download! To install ZLS with ZVM, simply pass the --zls flag with zvm i. For example:

zvm i --zls master

Select ZLS compatibility mode

By default, ZVM will install a ZLS build, which can be used with the given Zig version, but may not be able to build ZLS from source. If you want to use a ZLS build, which can be built using the selected Zig version, pass the --full flag with zvm i --zls. For example:

zvm i --zls --full master

[!IMPORTANT] This does not apply to tagged releases, e.g.: 0.13.0

Switch between installed Zig versions

zvm use <version>

Use use to switch between versions of Zig.

# Example
zvm use master

List installed Zig versions

# Example
zvm ls

Use ls to list all installed version of Zig.

List all versions of Zig available

zvm ls --all

The --all flag will list the available verisons of Zig for download. Not the versions locally installed.

List set version maps

zmv ls --vmu

The --vmu flag will list set version maps for Zig and ZLS downloads.

Uninstall a Zig version

# Example
zvm rm 0.10.0

Use uninstall or rm to remove an uninstalled version from your system.

Upgrade your ZVM installation

As of zvm v0.2.3 you can now upgrade your ZVM installation from, well, zvm. Just run:

zvm upgrade

The latest version of ZVM should install on your machine, regardless of where your binary lives (though if you have your binary in a privaledged folder, you may have to run this command with sudo).

Clean up build artifacts

# Example
zvm clean

Use clean to remove build artifacts (Good if you're on Windows).

Run installed version of Zig without switching your default

If you want to run a version of Zig without setting it as your default, the new run command is your friend.

zig version
# 0.13.0

zvm run 0.11.0 version
# 0.11.0

zig version
# 0.13.0

This can be helpful if you want to test your project on a newer version of Zig without having to switch between bins, or on alternative flavor of Zig.

How to use with alternative VMUs

Make sure you switch your VMU before using run.

zvm vmu zig mach
run mach-latest version
# 0.14.0-dev.1911+3bf89f55c

If you would like to run the currently set Zig, please keep using the standard zig command.

Set Version Map Source

ZVM lets choose your vendor for Zig and ZLS. This is great if your company hosts it's own internal fork of Zig, you prefer a different flavor of the language, like Mach.

zvm vmu zig "https://machengine.org/zig/index.json" # Change the source ZVM pulls Zig release information from.

zvm vmu zls https://validurl.local/vmu.json
                                       # ZVM only supports schemas that match the offical version map schema. 
                                       # Run `vmu default` to reset your version map.

zvm vmu zig default # Resets back to default Zig releases.
zvm vmu zig mach # Sets ZVM to pull from Mach nominated Zig.

zvm vmu zls default # Resets back to default ZLS releases.

Print program help

Print global help information by running:

zvm --help

Print help information about a specific command or subcommand.

zvm list --help

NAME:
   zvm list - list installed Zig versions. Flag `--all` to see remote options

USAGE:
   zvm list [command options] [arguments...]

OPTIONS:
   --all, -a   list remote Zig versions available for download, based on your version map (default: false)
   --vmu       list set version maps (default: false)
   --help, -h  show help

Print program version

zvm --version

Prints the version of ZVM you have installed.

---

Option flags

Color Toggle

Enable or disable colored ZVM output. No value toggles colors.

Enable

• on
• yes/y
• enabled
• true

Disabled

• off
• no/n
• disabled
• false

--color # Toggle ANSI color printing on or off for ZVM's output, i.e. --color=true

Environment Variables

• ZVM_DEBUG enables DEBUG logging for your executable. This is meant for contributors and developers.
• ZVM_SET_CU Toggle the automatic upgrade checker. If you want to reenable the checker, just uset ZVM_SET_CU.
• ZVM_PATH replaces the default install location for ZVM Set the environment variable to the parent directory of where you've placed the .zvm directory.

Settings

ZVM has additional setting stored in ~/.zvm/settings.json. You can manually update version maps, toggle color support, and disable the automatic upgrade checker here. All settings are also exposed as flags or environment variables. This file is stateful, and ZVM will create it if it does not exist and utilizes it for its operation.

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