d4hines / esy-fhs

Use the Esy package manager from Nix

esy-fhs

Esy and Nix are not compatible.

However, it is possible to use Nix to construct the kind of environment Esy expects, and then use Esy to build your project. This repository provides a Nix flake for doing just that - it builds an FHS-compatible chroot environment with Esy and its dependencies installed, from which you can use esy commands as normal.

Usage

(Be sure Nix flake support is enabled)

The main function exposed is lib.makeFHSApp - this lets you create an "app" can run use with nix run.

Example:

# flake.nix
{
  inputs.flake-utils.url = "github:numtide/flake-utils";
  inputs.esy-fhs.url = "github:d4hines/esy-fhs";
  outputs = { self, flake-utils, esy-fhs }:
    flake-utils.lib.eachDefaultSystem (system:
      {
        defaultApp = esy-fhs.lib.makeFHSApp { inherit system; };
      }
    );
}

To use esy, run nix run. When successful, nothing should change, except you should notice esy is now on your path.

( To speed up build time, I recommend you use https://app.cachix.org/cache/anmonteiro)

There additional options you can pass to lib.makeFHSApp:

• extraPackages - additional nix packages to install in an FHS-compatible way.
• extraBuildCommands - additional commands to run to set up the environment.
• runScript - the command to run on entering the environment. Defaults to your current shell.