name: Linux Package
on:
  push:
    branches:
      - master
      - maint
      - next
    tags:
      - "v*"
  pull_request:
  workflow_dispatch:

env:
  CARGO_TERM_COLOR: always

jobs:
  determine-versioning:
    runs-on: ubuntu-latest
    outputs:
      linux_package_version: ${{ steps.linux_version.outputs.linux_package_version }}
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Derive Linux package version
        id: linux_version
        shell: bash
        run: |
          : ${GITHUB_OUTPUT:=/tmp/github_output}

          BASE_VERSION=$(grep '^version' Cargo.toml | head -1 | sed 's/.*"\(.*\)"/\1/')
          if [[ "$GITHUB_REF" == refs/tags/* ]]; then
            VERSION="${GITHUB_REF_NAME#v}"
          else
            BRANCH=$(echo "$GITHUB_REF_NAME" | sed 's|[^A-Za-z0-9]|.|g; s/\.\.+/./g; s/^\.//; s/\.$//')
            HEIGHT=$(git rev-list --count HEAD)
            HASH=$(git rev-parse --short HEAD)
            if [[ -z "$BRANCH" ]]; then
              BRANCH="ref"
            fi
            VERSION="${BASE_VERSION}+${BRANCH}.${HEIGHT}.${HASH}"
          fi

          echo "linux_package_version=${VERSION}" >> "$GITHUB_OUTPUT"

  build:
    name: Build Linux artifacts (${{ matrix.artifact_arch }})
    runs-on: ${{ matrix.os }}
    needs: determine-versioning

    strategy:
      fail-fast: false
      matrix:
        include:
          - os: ubuntu-latest
            artifact_arch: x86_64
            deb_arch: amd64
          - os: ubuntu-24.04-arm
            artifact_arch: aarch64
            deb_arch: arm64

    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Set SOURCE_DATE_EPOCH from git
        run: echo "SOURCE_DATE_EPOCH=$(git log -1 --format=%ct)" >> "$GITHUB_ENV"

      - name: Install system dependencies
        run: sudo apt-get update && sudo apt-get install -y --no-install-recommends libdbus-1-dev llvm

      - name: Install Rust toolchain
        uses: actions-rust-lang/setup-rust-toolchain@v1
        with:
          cache: false
          rustflags: ''

      - name: Cache Cargo registry + build
        if: ${{ env.ACT != 'true' }}
        uses: actions/cache@v5
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: linux-release-${{ runner.os }}-${{ matrix.artifact_arch }}-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            linux-release-${{ runner.os }}-${{ matrix.artifact_arch }}-

      - name: Install cargo-deb
        run: cargo install cargo-deb --version 3.6.3 --locked

      - name: Build release binaries
        run: cargo build --release

      - name: Build systemd tarball
        env:
          STRIP: llvm-strip
        run: |
          packaging/systemd/build-tarball.sh \
            --version "${{ needs.determine-versioning.outputs.linux_package_version }}" \
            --arch "${{ matrix.artifact_arch }}" \
            --no-build

      - name: Build Debian package
        run: |
          packaging/debian/build-deb.sh \
            --version "${{ needs.determine-versioning.outputs.linux_package_version }}" \
            --no-build

      - name: Resolve Linux asset paths
        id: linux-assets
        shell: bash
        run: |
          : ${GITHUB_OUTPUT:=/tmp/github_output}

          TARBALL="deploy/fips-${{ needs.determine-versioning.outputs.linux_package_version }}-linux-${{ matrix.artifact_arch }}.tar.gz"
          if [[ ! -f "$TARBALL" ]]; then
            echo "Missing tarball: $TARBALL" >&2
            exit 1
          fi

          DEB_FILE=$(find deploy -maxdepth 1 -type f -name "fips_*_${{ matrix.deb_arch }}.deb" | sort | head -n 1)
          if [[ -z "$DEB_FILE" ]]; then
            echo "Missing Debian package for ${{ matrix.deb_arch }}" >&2
            exit 1
          fi

          echo "tarball=$TARBALL" >> "$GITHUB_OUTPUT"
          echo "deb=$DEB_FILE" >> "$GITHUB_OUTPUT"

      - name: SHA-256 hashes
        run: |
          echo "==> Linux release assets:"
          sha256sum \
            "${{ steps.linux-assets.outputs.tarball }}" \
            "${{ steps.linux-assets.outputs.deb }}"

      - name: Upload artifact (GitHub only)
        if: ${{ env.ACT != 'true' }}
        uses: actions/upload-artifact@v7
        with:
          name: fips_${{ needs.determine-versioning.outputs.linux_package_version }}_${{ matrix.artifact_arch }}_linux
          path: |
            ${{ steps.linux-assets.outputs.tarball }}
            ${{ steps.linux-assets.outputs.deb }}
          retention-days: 30

      - name: Build Summary
        run: |
          echo "Build Summary for linux/${{ matrix.artifact_arch }}:"
          echo "  Tarball: ${{ steps.linux-assets.outputs.tarball }}"
          echo "  Debian:  ${{ steps.linux-assets.outputs.deb }}"

  release:
    name: Publish Linux assets to GitHub Release
    runs-on: ubuntu-latest
    needs: build
    if: startsWith(github.ref, 'refs/tags/')
    permissions:
      contents: write

    steps:
      - name: Download Linux artifacts
        uses: actions/download-artifact@v8
        with:
          path: dist
          merge-multiple: true

      - name: Generate Linux release checksums
        run: |
          cd dist
          find . -maxdepth 1 -type f \( -name '*.deb' -o -name '*.tar.gz' \) -printf '%P\n' \
            | LC_ALL=C sort \
            | xargs sha256sum \
            > checksums-linux.txt

      - name: Wait for tag release
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          for attempt in $(seq 1 20); do
            if gh release view "${GITHUB_REF_NAME}" --repo "${GITHUB_REPOSITORY}" >/dev/null 2>&1; then
              exit 0
            fi
            echo "Release ${GITHUB_REF_NAME} not available yet; waiting..."
            sleep 15
          done

          echo "Timed out waiting for release ${GITHUB_REF_NAME}" >&2
          exit 1

      - name: Upload Linux assets
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          gh release upload "${GITHUB_REF_NAME}" \
            dist/*.deb \
            dist/*.tar.gz \
            dist/checksums-linux.txt \
            --clobber \
            --repo "${GITHUB_REPOSITORY}"