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README.md
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@ -33,7 +33,7 @@ jobs:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2.3.4
- uses: cachix/install-nix-action@v12
- uses: cachix/install-nix-action@v13
with:
nix_path: nixpkgs=channel:nixos-unstable
- run: nix-build
@ -52,14 +52,15 @@ jobs:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2.3.4
- uses: cachix/install-nix-action@v12
- uses: cachix/install-nix-action@v13
with:
install_url: https://nixos-nix-install-tests.cachix.org/serve/lb41az54kzk6j12p81br4bczary7m145/install
install_url: https://nixos-nix-install-tests.cachix.org/serve/i6laym9jw3wg9mw6ncyrk6gjx4l34vvx/install
install_options: '--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve'
extra_nix_config: |
experimental-features = nix-command flakes
access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
- run: nix-build
- run: nix build
- run: nix flake check
```
To install Nix from any commit, go to [the corresponding installer_test action](https://github.com/NixOS/nix/runs/2219534360) and click on "Run cachix/install-nix-action@XX" step and expand the first line.
@ -79,19 +80,21 @@ To install Nix from any commit, go to [the corresponding installer_test action](
### How do I print nixpkgs version I have configured?
```nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'```
```yaml
- name: Print nixpkgs version
run: nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'
```
### How can I run NixOS tests?
With the following inputs:
```yaml
- uses: cachix/install-nix-action@vXX
with:
extra_nix_config: "system-features = nixos-test benchmark big-parallel kvm"
- uses: cachix/install-nix-action@vXX
with:
extra_nix_config: "system-features = nixos-test benchmark big-parallel kvm"
```
[Note that there's no hardware acceleration on GitHub Actions.](https://github.com/actions/virtual-environments/issues/183#issuecomment-610723516).
### How can I install packages via nix-env from the specified `nix_path`?
@ -100,6 +103,31 @@ With the following inputs:
nix-env -i mypackage -f '<nixpkgs>'
```
### How do I add a binary cache?
If the binary cache you want to add is hosted on [Cachix](https://cachix.org/) and you are
using [cachix-action](https://github.com/cachix/cachix-action), you
should use their `extraPullNames` input like this:
```yaml
- uses: cachix/cachix-action@vXX
with:
name: mycache
authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
extraPullNames: nix-community
```
Otherwise, you can add any binary cache to nix.conf using
install-nix-action's own `extra_nix_config` input:
```yaml
- uses: cachix/install-nix-action@vXX
with:
extra_nix_config: |
trusted-public-keys = hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
substituters = https://hydra.iohk.io https://cache.nixos.org/
```
## Hacking
Install the dependencies