flake-update.yml

name: Updater

on:
  schedule:
    - cron: "0 2 * * *"
  workflow_dispatch: {}

jobs:
  generate_matrix:
    runs-on: ubuntu-20.04
    outputs:
      packages: ${{ steps.gen_packages.outputs.packages }}
      checks: ${{ steps.gen_checks.outputs.checks }}
    steps:
      - name: Clone repository
        uses: actions/checkout@v3
        with:
          token: "${{ secrets.GITHUB_TOKEN }}"
      - name: Install nix
        uses: cachix/install-nix-action@v22
        with:
          extra_nix_config: |
            auto-optimise-store = true
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
            experimental-features = nix-command flakes
            substituters = https://cache.nixos.org/ https://nix-community.cachix.org
            trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=
          install_url: https://releases.nixos.org/nix/nix-2.12.0/install
      - name: Generate flake.json
        run: |
          nix flake show --json > flake.json
      - id: gen_packages
        run: |
          packages=$(jq -c '.packages."x86_64-linux" | keys' < flake.json)
          printf "::set-output name=packages::%s" "$packages"
      - id: gen_checks
        run: |
          checks=$(jq -c '.checks."x86_64-linux" | keys' < flake.json)
          printf "::set-output name=checks::%s" "$checks"

  update_flake:
    runs-on: ubuntu-20.04
    steps:
      - name: Clone repository
        uses: actions/checkout@v3
        with:
          token: "${{ secrets.GITHUB_TOKEN }}"
      - name: Install nix
        uses: cachix/install-nix-action@v22
        with:
          extra_nix_config: |
            auto-optimise-store = true
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
            experimental-features = nix-command flakes
            substituters = https://cache.nixos.org/ https://nix-community.cachix.org
            trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=
          install_url: https://releases.nixos.org/nix/nix-2.12.0/install
      - name: Set up git
        run: |
          git config user.email gitbot@nobbz.dev
          git config user.name "Git Bot"
      - name: Update the flake
        run: nix flake update
      - name: Store flake.lock
        uses: actions/upload-artifact@v3
        with:
          name: flake_lock
          path: flake.lock

  build_flake:
    runs-on: ubuntu-20.04
    needs: [generate_matrix, update_flake]
    strategy:
      fail-fast: false
      max-parallel: 5
      matrix:
        package: ${{fromJson(needs.generate_matrix.outputs.packages)}}
    steps:
      # - name: Prepare store folder
      #   run: sudo mkdir -p /nix
      # - name: Free diskspace
      #   uses: easimon/maximize-build-space@master
      #   with:
      #     build-mount-path: /nix
      #     remove-dotnet: true
      #     remove-android: true
      #     remove-haskell: true
      - name: Clone repository
        uses: actions/checkout@v3
        with:
          token: "${{ secrets.GITHUB_TOKEN }}"
      - name: Install nix
        uses: cachix/install-nix-action@v22
        with:
          extra_nix_config: |
            auto-optimise-store = true
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
            experimental-features = nix-command flakes
            substituters = https://cache.nixos.org/ https://nix-community.cachix.org
            trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=
          install_url: https://releases.nixos.org/nix/nix-2.12.0/install
      - name: Set up cachix
        uses: cachix/cachix-action@master # pathsToPush, please update once we have v11!
        with:
          name: nobbz
          signingKey: "${{ secrets.CACHIX_SIGNING_KEY }}"
          pathsToPush: result
      - name: Restore flake.lock
        uses: actions/download-artifact@v3
        with:
          name: flake_lock
      - name: Build everything
        run: nix build .#${{ matrix.package }}

  build_checks:
    runs-on: ubuntu-20.04
    needs: [generate_matrix, update_flake]
    strategy:
      fail-fast: false
      max-parallel: 5
      matrix:
        check: ${{fromJson(needs.generate_matrix.outputs.checks)}}
    steps:
      - name: Clone repository
        uses: actions/checkout@v3
        with:
          token: "${{ secrets.GITHUB_TOKEN }}"
      - name: Install nix
        uses: cachix/install-nix-action@v22
        with:
          extra_nix_config: |
            auto-optimise-store = true
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
            experimental-features = nix-command flakes
            substituters = https://cache.nixos.org/ https://nix-community.cachix.org
            trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=
          install_url: https://releases.nixos.org/nix/nix-2.12.0/install
      - name: Set up cachix
        uses: cachix/cachix-action@master # pathsToPush, please update once we have v11!
        with:
          name: nobbz
          signingKey: "${{ secrets.CACHIX_SIGNING_KEY }}"
          skipPush: true
      - name: Restore flake.lock
        uses: actions/download-artifact@v3
        with:
          name: flake_lock
      - name: Build everything
        run: nix build .#checks.x86_64-linux.${{ matrix.check }} --no-link

  check_flake:
    runs-on: ubuntu-20.04
    needs: [update_flake]
    continue-on-error: true
    steps:
      - name: Clone repository
        uses: actions/checkout@v3
        with:
          token: "${{ secrets.GITHUB_TOKEN }}"
      - name: Install nix
        uses: cachix/install-nix-action@v22
        with:
          extra_nix_config: |
            auto-optimise-store = true
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
            experimental-features = nix-command flakes
            substituters = https://cache.nixos.org/ https://nix-community.cachix.org
            trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=
          install_url: https://releases.nixos.org/nix/nix-2.12.0/install
      - name: Restore flake.lock
        uses: actions/download-artifact@v3
        with:
          name: flake_lock
      - name: Build everything
        run: |
          nix flake check --keep-going

  push_update:
    runs-on: ubuntu-20.04
    permissions: write-all
    needs: [update_flake, build_flake, build_checks, check_flake]
    steps:
      - name: Clone repository
        uses: actions/checkout@v3
        with:
          token: "${{ secrets.GITHUB_TOKEN }}"
      - name: Restore flake.lock
        uses: actions/download-artifact@v3
        with:
          name: flake_lock
      - name: Set up git
        run: |
          git config user.email gitbot@nobbz.dev
          git config user.name "Git Bot"
      - name: Create and merge PR
        run: |
          git switch -c updates-${{ github.run_id }}
          git commit -am "flake.lock: Update"
          git push -u origin updates-${{ github.run_id }}
          PR=$(gh pr create \
            --assignee NobbZ \
            --base main \
            --body "Automatic flake update on $(date -I)" \
            --fill \
            --label bot \
            --title "Auto update $(date -I)")
          gh pr merge $PR --merge --delete-branch
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}