ci.yml

name: Build and test flake outputs
on:
  push:
  workflow_dispatch:
  workflow_call:
    inputs:
      branch:
        description: Branch name to build on
        default: ""
        required: false
        type: string
    secrets:
      CACHIX_ACTIVATE_TOKEN:
      CACHIX_AUTH_TOKEN:
        required: true

jobs:
  nix:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        system:
          - aarch64
          - x86_64
        include:
          - nix-command: --print-build-logs build .#
            system: aarch64

          - nix-command: --print-build-logs build .# 
            system: x86_64

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          ref: ${{ inputs.branch }}

      - name: Free Disk Space (Ubuntu)
        uses: jlumbroso/free-disk-space@main
        continue-on-error: true
        with:
          tool-cache: true

      - name: Install qemu-user-static (aarch64)
        if: matrix.system == 'aarch64'
        env:
          _system: ${{ matrix.system }}-linux
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          sudo apt-get update
          sudo apt-get install -y qemu-user-static

      - name: Install nix (x86_64)
        if: matrix.system == 'x86_64'
        env:
          _system: ${{ matrix.system }}-linux
        uses: nixbuild/nix-quick-install-action@v25
        with:
          nix_conf: |
            substituters = https://cache.nixos.org/ https://nix-community.cachix.org
            trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=
            keep-going = true
            show-trace = true
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
            keep-outputs = true

      - name: Install nix (aarch64)
        if: matrix.system == 'aarch64'
        env:
          _system: ${{ matrix.system }}-linux
        uses: nixbuild/nix-quick-install-action@v25
        with:
          nix_conf: |
            substituters = https://cache.nixos.org/ https://nix-community.cachix.org
            trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=
            keep-going = true
            show-trace = true
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
            keep-outputs = true
            system = aarch64-linux # enables binfmt on that machine, see https://nixos.wiki/wiki/NixOS_on_ARM#Compiling_through_binfmt_QEMU

      - name: Restore and cache Nix store
        env:
          _system: ${{ matrix.system }}-linux
        uses: nix-community/cache-nix-action@v2
        with:
          gc-enabled-linux: true
          gc-max-store-size-linux: 13000000000
          gc-enabled-macos: true
          gc-max-store-size-macos: 13000000000
          purge-enabled: true
          purge-max-age: 86400
          purge-by-created-time: true
          purge-by-accessed-time: true
          # output debug info
          debug: true
          # save a new cache every time ci file changes
          key: cache-ubuntu-latest-${{ hashFiles('.github/workflows/ci.yml') }}
          restore-keys: |
            cache-ubuntu-latest-

      - name: Setup cachix
        env:
          _system: ${{ matrix.system }}-linux
        uses: cachix/cachix-action@v12
        with:
          name: 573-bc
          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}

      - name: Build command
        env:
          _system: ${{ matrix.system }}-linux
        run: |
            cachix use nix-on-droid
            cachix use 573-bc
            cachix use nix-community
            cachix use arm

            echo "::group::Build command"
            cachix watch-exec 573-bc \
            nix -- ${{ matrix.nix-command }}
            echo "outPaths=$(nix ${{ matrix.nix-command }} --print-out-paths)" >> $GITHUB_ENV

      - name: Upload PDF
        env:
          _system: ${{ matrix.system }}-linux
        uses: actions/upload-artifact@v3
        with:
          name: Generated Pdf of famcal (${{ env._system }})
          path: ${{ env.outPaths }}/*.pdf

      - name: Push
        env:
          _system: ${{ matrix.system }}-linux
        run: |
          spec=${{ env.outPaths }}
          cachix push 573-bc $spec

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