105 lines
2.9 KiB
Markdown
105 lines
2.9 KiB
Markdown
# install-nix-action
|
|
|
|
|
|
|
|
Installs [Nix](https://nixos.org/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](https://status.nixos.org/)
|
|
or [pin nixpkgs yourself](https://nix.dev/reference/pinning-nixpkgs.html)
|
|
(see also [pinning tutorial](https://nix.dev/tutorials/towards-reproducibility-pinning-nixpkgs.html)).
|
|
|
|
# Features
|
|
|
|
- Quick installation (~4s on Linux, ~20s on macOS)
|
|
- Multi-User installation (with sandboxing enabled only on Linux)
|
|
- [Self-hosted github runner](https://docs.github.com/en/actions/hosting-your-own-runners/about-self-hosted-runners) 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`
|
|
|
|
## Usage
|
|
|
|
Create `.github/workflows/test.yml` in your repo with the following contents:
|
|
|
|
```yaml
|
|
name: "Test"
|
|
on:
|
|
pull_request:
|
|
push:
|
|
jobs:
|
|
tests:
|
|
runs-on: ubuntu-latest
|
|
steps:
|
|
- uses: actions/checkout@v2
|
|
- uses: cachix/install-nix-action@v11
|
|
with:
|
|
nix_path: nixpkgs=channel:nixos-unstable
|
|
- run: nix-build
|
|
```
|
|
|
|
See also [cachix-action](https://github.com/cachix/cachix-action) for
|
|
simple binary cache setup to speed up your builds and share binaries
|
|
with developers.
|
|
|
|
## Usage with Flakes
|
|
|
|
```yaml
|
|
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@v11
|
|
with:
|
|
install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-3.0pre20201007_5257a25/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](https://github.com/actions/virtual-environments/issues/183#issuecomment-610723516).
|
|
|
|
### How do I print nixpkgs version with the channel I have configured?
|
|
|
|
|
|
```nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'```
|
|
|
|
## Hacking
|
|
|
|
Install the dependencies
|
|
```bash
|
|
$ yarn install
|
|
```
|
|
|
|
Build the typescript
|
|
```bash
|
|
$ yarn build
|
|
```
|
|
|
|
Run the tests :heavy_check_mark:
|
|
```bash
|
|
$ yarn test
|
|
```
|