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zup

zup (pronounced zee-up) is a tool to manage versions of the Zig toolchain (currently the compiler and zls). It intends to make it easy to work with multiple versions of the Zig compiler and ZLS across projects.

These problems are in scope:

  • Install specific versions of Zig (and a compatible version of ZLS)
  • Install / update to the latest master / stable versions of these tools with a single command
  • Switch between installed tool versions with a single command
  • List all installed tool versions, and manually purge the ones you don't need
  • Install / switch to the correct version of tools for projects with a build.zig.zon with a single command

These are also goals of the upcoming official Zig package manager. As such, I expect it to supersede zup at some point.

Installation

You can download a pre-built binary for a supported OS / arch from the Releases page, extract, and place it in a location that is in your $PATH. I recommend ~/.zup/bin, since that is also where Zup installs toolchains by default. You may also have to give it execution permissions by running chmod +x zup.

Then, add ~/.zup/bin to your $PATH:

# sh / bash / zsh
export PATH=$PATH:/home/sid/.zup/bin

#### OR ####

# fish
fish_add_path /home/sid/.zup/bin

Usage

Download, install & activate the latest master version of Zig and ZLS:

$ zup install

info(zup): Checking for updates on master
info(zup): Latest version on master is already installed, skipping download
info(zup): Setting 0.12.0-dev.3405+31791ae15 as active

Download, install & activate the latest stable version of Zig and ZLS:

$ zup install stable

Download, install & activate a specific version of Zig and ZLS:

$ zup install 0.11.0
$ zup install 0.12.0-dev.2990+31763d28c 

List all currently downloaded versions of Zig and ZLS:

$ zup list
$ zup list master
$ zup list stable

info(zup): Install location: /Users/siddhant/.zup

0.12.0-dev.3029+723d13f83
  └─ Zig: 0.12.0-dev.3029+723d13f83
  └─ ZLS: 0.12.0-dev.438+8cca7a1
0.12.0-dev.3405+31791ae15
  └─ Zig: 0.12.0-dev.3405+31791ae15
  └─ ZLS: 0.12.0-dev.493+0844c71

Display all usage instructions:

$ zup --help

Configuration

The only configuration option currently is the ZUP_PREFIX environment variable. Set it to a valid path to tell Zup where to place downloaded binaries. ZUP_PREFIX defaults to ~/.zup

# sh / bash / zsh
export ZUP_PREFIX=/usr/local/.zup

#### OR ####

# fish
set -x ZUP_PREFIX /usr/local/.zup

Uninstallation

Uninstallation is a matter of deleting the zup binary, as well as all installed toolchain versions.

Delete the zup binary from wherever you put it initially (run which zup to find out).

Installed toolchains are not deleted automatically out of an abundance of caution. If you overrode the ZUP_PREFIX environment variable, delete the directory it points to, and unset the environment variable. Otherwise, delete the ~/.zup directory.

Also don't forget to remove ~/.zup/bin from your $PATH.


Development

Please be mindful of hitting ZLS / Zig servers during development, these projects are community-funded and blob egress is expensive. I've included a mock server for use during development under /devserver. This is currently a JS project, so it requires Bun installed. Run bun install, followed by bun run src/index.ts to start up the mock server. Debug zup builds should automatically talk to this dev server. Release builds talk to Zig / ZLS servers.

Releases

Bump up the version in build.zig.zon, as well as in src/zup.zig, and commit this change.

Running the Release GitHub action with a version number tags the HEAD on main and creates a release draft. This must be published by a human manually.