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nix/.github/actions/install-nix-action/action.yaml
Seth Flynn 92d7381826
ci: allow for using the latest build of the experimental installer
Until these repos are potentially merged, this is good for dogfooding
alongside the experimental installer. It also uses the more official
`artifacts.nixos.org` endpoint to install stable releases now

More immediately though, we need a patch for the experimental installer
to really work in CI at all, and that hasn't landed in a tag yet. So,
this lets us use it right from `main`!
2025-10-03 03:37:59 -04:00

120 lines
6.4 KiB
YAML

name: "Install Nix"
description: "Helper action for installing Nix with support for dogfooding from master"
inputs:
dogfood:
description: "Whether to use Nix installed from the latest artifact from master branch"
required: true # Be explicit about the fact that we are using unreleased artifacts
experimental-installer:
description: "Whether to use the experimental installer to install Nix"
default: false
experimental-installer-version:
description: "Version of the experimental installer to use. If `latest`, the newest artifact from the default branch is used."
# TODO: This should probably be pinned to a release after https://github.com/NixOS/experimental-nix-installer/pull/49 lands in one
default: "latest"
extra_nix_config:
description: "Gets appended to `/etc/nix/nix.conf` if passed."
install_url:
description: "URL of the Nix installer"
required: false
default: "https://releases.nixos.org/nix/nix-2.30.2/install"
tarball_url:
description: "URL of the Nix tarball to use with the experimental installer"
required: false
github_token:
description: "Github token"
required: true
runs:
using: "composite"
steps:
- name: "Download nix install artifact from master"
shell: bash
id: download-nix-installer
if: inputs.dogfood == 'true'
run: |
RUN_ID=$(gh run list --repo "$DOGFOOD_REPO" --workflow ci.yml --branch master --status success --json databaseId --jq ".[0].databaseId")
if [ "$RUNNER_OS" == "Linux" ]; then
INSTALLER_ARTIFACT="installer-linux"
elif [ "$RUNNER_OS" == "macOS" ]; then
INSTALLER_ARTIFACT="installer-darwin"
else
echo "::error ::Unsupported RUNNER_OS: $RUNNER_OS"
exit 1
fi
INSTALLER_DOWNLOAD_DIR="$GITHUB_WORKSPACE/$INSTALLER_ARTIFACT"
mkdir -p "$INSTALLER_DOWNLOAD_DIR"
gh run download "$RUN_ID" --repo "$DOGFOOD_REPO" -n "$INSTALLER_ARTIFACT" -D "$INSTALLER_DOWNLOAD_DIR"
echo "installer-path=file://$INSTALLER_DOWNLOAD_DIR" >> "$GITHUB_OUTPUT"
TARBALL_PATH="$(find "$INSTALLER_DOWNLOAD_DIR" -name 'nix*.tar.xz' -print | head -n 1)"
echo "tarball-path=file://$TARBALL_PATH" >> "$GITHUB_OUTPUT"
echo "::notice ::Dogfooding Nix installer from master (https://github.com/$DOGFOOD_REPO/actions/runs/$RUN_ID)"
env:
GH_TOKEN: ${{ inputs.github_token }}
DOGFOOD_REPO: "NixOS/nix"
- name: "Gather system info for experimental installer"
shell: bash
if: ${{ inputs.experimental-installer == 'true' }}
run: |
echo "::notice Using experimental installer from $EXPERIMENTAL_INSTALLER_REPO (https://github.com/$EXPERIMENTAL_INSTALLER_REPO)"
if [ "$RUNNER_OS" == "Linux" ]; then
EXPERIMENTAL_INSTALLER_SYSTEM="linux"
echo "EXPERIMENTAL_INSTALLER_SYSTEM=$EXPERIMENTAL_INSTALLER_SYSTEM" >> "$GITHUB_ENV"
elif [ "$RUNNER_OS" == "macOS" ]; then
EXPERIMENTAL_INSTALLER_SYSTEM="darwin"
echo "EXPERIMENTAL_INSTALLER_SYSTEM=$EXPERIMENTAL_INSTALLER_SYSTEM" >> "$GITHUB_ENV"
else
echo "::error ::Unsupported RUNNER_OS: $RUNNER_OS"
exit 1
fi
if [ "$RUNNER_ARCH" == "X64" ]; then
EXPERIMENTAL_INSTALLER_ARCH=x86_64
echo "EXPERIMENTAL_INSTALLER_ARCH=$EXPERIMENTAL_INSTALLER_ARCH" >> "$GITHUB_ENV"
elif [ "$RUNNER_ARCH" == "ARM64" ]; then
EXPERIMENTAL_INSTALLER_ARCH=aarch64
echo "EXPERIMENTAL_INSTALLER_ARCH=$EXPERIMENTAL_INSTALLER_ARCH" >> "$GITHUB_ENV"
else
echo "::error ::Unsupported RUNNER_ARCH: $RUNNER_ARCH"
exit 1
fi
echo "EXPERIMENTAL_INSTALLER_ARTIFACT=nix-installer-$EXPERIMENTAL_INSTALLER_ARCH-$EXPERIMENTAL_INSTALLER_SYSTEM" >> "$GITHUB_ENV"
env:
EXPERIMENTAL_INSTALLER_REPO: "NixOS/experimental-nix-installer"
- name: "Download latest experimental installer"
shell: bash
id: download-latest-experimental-installer
if: ${{ inputs.experimental-installer == 'true' && inputs.experimental-installer-version == 'latest' }}
run: |
RUN_ID=$(gh run list --repo "$EXPERIMENTAL_INSTALLER_REPO" --workflow ci.yml --branch main --status success --json databaseId --jq ".[0].databaseId")
EXPERIMENTAL_INSTALLER_DOWNLOAD_DIR="$GITHUB_WORKSPACE/$EXPERIMENTAL_INSTALLER_ARTIFACT"
mkdir -p "$EXPERIMENTAL_INSTALLER_DOWNLOAD_DIR"
gh run download "$RUN_ID" --repo "$EXPERIMENTAL_INSTALLER_REPO" -n "$EXPERIMENTAL_INSTALLER_ARTIFACT" -D "$EXPERIMENTAL_INSTALLER_DOWNLOAD_DIR"
# Executable permissions are lost in artifacts
find $EXPERIMENTAL_INSTALLER_DOWNLOAD_DIR -type f -exec chmod +x {} +
echo "installer-path=$EXPERIMENTAL_INSTALLER_DOWNLOAD_DIR" >> "$GITHUB_OUTPUT"
env:
GH_TOKEN: ${{ inputs.github_token }}
EXPERIMENTAL_INSTALLER_REPO: "NixOS/experimental-nix-installer"
- uses: cachix/install-nix-action@c134e4c9e34bac6cab09cf239815f9339aaaf84e # v31.5.1
if: ${{ inputs.experimental-installer != 'true' }}
with:
# Ternary operator in GHA: https://www.github.com/actions/runner/issues/409#issuecomment-752775072
install_url: ${{ inputs.dogfood == 'true' && format('{0}/install', steps.download-nix-installer.outputs.installer-path) || inputs.install_url }}
install_options: ${{ inputs.dogfood == 'true' && format('--tarball-url-prefix {0}', steps.download-nix-installer.outputs.installer-path) || '' }}
extra_nix_config: ${{ inputs.extra_nix_config }}
- uses: DeterminateSystems/nix-installer-action@786fff0690178f1234e4e1fe9b536e94f5433196 # v20
if: ${{ inputs.experimental-installer == 'true' }}
with:
diagnostic-endpoint: ""
# TODO: It'd be nice to use `artifacts.nixos.org` for both of these, maybe through an `/experimental-installer/latest` endpoint? or `/commit/<hash>`?
local-root: ${{ inputs.experimental-installer-version == 'latest' && steps.download-latest-experimental-installer.outputs.installer-path || '' }}
source-url: ${{ inputs.experimental-installer-version != 'latest' && 'https://artifacts.nixos.org/experimental-installer/tag/${{ inputs.experimental-installer-version }}/${{ env.EXPERIMENTAL_INSTALLER_ARTIFACT }}' || '' }}
nix-package-url: ${{ inputs.dogfood == 'true' && steps.download-nix-installer.outputs.tarball-path || (inputs.tarball_url || '') }}
extra-conf: ${{ inputs.extra_nix_config }}