mirror of https://github.com/cachix/install-nix-action.git synced 2024-12-22 15:03:28 +00:00

Installs Nix on GitHub Actions for the supported platforms: Linux and macOS.

actions nix

Find a file

Domen Kožar 0598b739d8 Merge pull request #68 from cachix/installer_options be able to pass installer options		2021-02-21 13:41:03 +00:00
.github	Fix flakes example and add a test	2020-12-22 11:45:56 +01:00
__tests__	Initial commit	2019-10-02 11:52:32 +02:00
lib	be able to pass installer options	2021-02-21 13:18:52 +00:00
src	Prepare for Nix 2.3.5	2020-05-26 18:08:30 +02:00
.gitignore	Initial commit	2019-10-02 11:52:32 +02:00
action.yml	be able to pass installer options	2021-02-21 13:18:52 +00:00
jest.config.js	Initial commit	2019-10-02 11:52:32 +02:00
LICENSE	Initial commit	2019-10-02 11:52:32 +02:00
package.json	Bump @actions/core from 1.1.1 to 1.2.6	2020-10-01 17:21:05 +00:00
README.md	README: bump flakes installer	2020-12-23 11:06:01 +01:00
shell.nix	add shell.nix for easier development	2019-11-07 10:19:07 +01:00
test.nix	add failing test	2020-08-25 18:17:09 +02:00
tsconfig.json	Initial commit	2019-10-02 11:52:32 +02:00
yarn.lock	Bump ini from 1.3.5 to 1.3.8	2020-12-11 22:00:42 +00:00

README.md

install-nix-action

Installs Nix on GitHub Actions for the supported platforms: Linux and macOS.

By default it has no nixpkgs configured, you have to set nix_path by picking a channel or pin nixpkgs yourself (see also pinning tutorial).

Features

Quick installation (~4s on Linux, ~20s on macOS)
Multi-User installation (with sandboxing enabled only on Linux)
Self-hosted github runner support
Allows specifying Nix installation URL via install_url
Allows specifying extra Nix configration options via extra_nix_config
Allows specifying $NIX_PATH and channels via nix_path
Share /nix/store between builds using cachix-action for simple binary cache setup to speed up your builds and share binaries with your team

Usage

Create .github/workflows/test.yml in your repo with the following contents:

name: "Test"
on:
  pull_request:
  push:
jobs:
  tests:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2.3.4
    - uses: cachix/install-nix-action@v12
      with:
        nix_path: nixpkgs=channel:nixos-unstable
    - run: nix-build

Usage with Flakes

name: "Test"
on:
  pull_request:
  push:
jobs:
  tests:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
      with:
          # Nix Flakes doesn't work on shallow clones
          fetch-depth: 0
    - uses: cachix/install-nix-action@v12
      with:
        install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20201221_9fab14a/install
        extra_nix_config: |
          experimental-features = nix-command flakes          
    - run: nix-build

Inputs (specify using `with:`)

install_url: specify URL to install Nix from (useful for testing non-stable releases or pinning Nix for example https://releases.nixos.org/nix/nix-2.3.7/install)
nix_path: set NIX_PATH environment variable, for example nixpkgs=channel:nixos-unstable
extra_nix_config: append to /etc/nix/nix.conf

FAQ

Is it possible to run NixOS tests / Qemu+KVM with GitHub Actions?

Currently GitHub Actions are not running on Azure instance types that support nested virtualization.

How do I print nixpkgs version I have configured?

nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'

How can I run NixOS tests?

With the following inputs:

    - uses: cachix/install-nix-action@vXX
      with:
        extra_nix_config: "system-features = nixos-test benchmark big-parallel kvm"

Note that there's no hardware acceleration on GitHub Actions.

How can I install packages via nix-env from the specified `nix_path`?

nix-env -i mypackage -f '<nixpkgs>'

Hacking

Install the dependencies

$ yarn install

Build the typescript

$ yarn build

Run the tests ✔️

$ yarn test