name: Release

# GitHub version of the release pipeline. The build half mirrors the Gitea one
# in .gitea/workflows/release.yml (static musl Linux via cargo-zigbuild, native
# macOS and Windows); only the publish half differs: GitHub needs the v4
# artifact backend and fills the release with `gh`.
#
# Every job is gated on `github.server_url == 'https://github.com'`, so this file
# runs only on GitHub. Gitea runs its own copy in .gitea/workflows; should a
# Gitea instance also read .github/workflows, the guard skips these jobs there
# so they never fail on the @v4 artifact backend or `gh`.
on:
  push:
    tags: ["v*"]

permissions:
  contents: write

env:
  CARGO_TERM_COLOR: always
  CARGO_NET_RETRY: "10"

jobs:
  build:
    name: ${{ matrix.asset }}
    if: ${{ github.server_url == 'https://github.com' }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - os: ubuntu-latest
            target: x86_64-unknown-linux-musl
            asset: tsunagi-linux-x86_64
            archive: tar.gz
            zig: true
          - os: ubuntu-latest
            target: aarch64-unknown-linux-musl
            asset: tsunagi-linux-aarch64
            archive: tar.gz
            zig: true
          - os: macos-latest
            target: aarch64-apple-darwin
            asset: tsunagi-macos-aarch64
            archive: tar.gz
            zig: false
          - os: windows-latest
            target: x86_64-pc-windows-msvc
            asset: tsunagi-windows-x86_64
            archive: zip
            zig: false

    steps:
      - uses: actions/checkout@v4

      - uses: dtolnay/rust-toolchain@stable
        with:
          targets: ${{ matrix.target }}

      - uses: Swatinem/rust-cache@v2
        with:
          key: ${{ matrix.target }}

      # aws-lc-sys (iroh's rustls backend) and the bundled sqlite are C, and the
      # musl targets have no prebuilt bindings, so bindgen needs libclang and the
      # C build needs cmake. zig is the cross C compiler cargo-zigbuild drives.
      - name: Install musl build tooling
        if: matrix.zig
        run: sudo apt-get update && sudo apt-get install -y --no-install-recommends cmake clang libclang-dev
      - name: Install zig
        if: matrix.zig
        uses: mlugg/setup-zig@v2
        with:
          # Pin a real, archived Zig release. Left unpinned the action resolves
          # to the newest version it knows of (a yet-unreleased 0.16.0-dev),
          # whose tarball 404s on ziglang.org while the community mirrors flake.
          version: 0.14.1
      - name: Install cargo-zigbuild
        if: matrix.zig
        uses: taiki-e/install-action@v2
        with:
          tool: cargo-zigbuild

      - name: Build
        shell: bash
        run: |
          set -euo pipefail
          if [[ "${{ matrix.zig }}" == "true" ]]; then
            # zig's linker ignores the `-O1` GNU-ld optimization flag Rust passes
            # and says so on stderr, which rustc now surfaces as a linker_messages
            # warning. It is cosmetic — the binary is correct — so quiet just that
            # one lint to keep the musl build log clean. A real link error still
            # fails the build.
            export RUSTFLAGS="${RUSTFLAGS:-} -A linker_messages"
            cargo zigbuild --release --locked --target "${{ matrix.target }}" --bin tsunagi
          else
            cargo build --release --locked --target "${{ matrix.target }}" --bin tsunagi
          fi

      - name: Package
        shell: bash
        run: |
          set -euo pipefail

          version="${GITHUB_REF_NAME#v}"
          stage="dist/pkg/${{ matrix.asset }}"
          mkdir -p "$stage"

          bin="tsunagi"
          [[ "${{ runner.os }}" == "Windows" ]] && bin="tsunagi.exe"
          cp "target/${{ matrix.target }}/release/${bin}" "$stage/"

          # The top-level README, plus the per-OS install notes and integration
          # files, so the archive carries what the platform needs to set up.
          cp README.md "$stage/"
          case "${{ runner.os }}" in
            Linux)
              cp dist/linux/tsunagi.service dist/linux/install.sh "$stage/"
              cp dist/linux/README.md "$stage/INSTALL.md"
              ;;
            macOS)
              cp dist/macos/cy.hexor.tsunagi.plist "$stage/"
              cp dist/macos/README.md "$stage/INSTALL.md"
              ;;
            Windows)
              cp dist/windows/README.md "$stage/INSTALL.md"
              ;;
          esac

          archive="${{ matrix.asset }}-${version}.${{ matrix.archive }}"
          if [[ "${{ matrix.archive }}" == "zip" ]]; then
            (cd dist/pkg && 7z a "../../${archive}" "${{ matrix.asset }}")
          else
            tar -C dist/pkg -czf "${archive}" "${{ matrix.asset }}"
          fi

      - name: Upload the archive as a run artifact
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.asset }}
          path: ${{ matrix.asset }}-*.*
          if-no-files-found: error

  publish:
    name: Publish release
    needs: build
    if: ${{ github.server_url == 'https://github.com' }}
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Download every build artifact
        uses: actions/download-artifact@v4
        with:
          path: artifacts

      - name: Show what was collected
        run: find artifacts -type f

      - name: Create the release and upload the archives
        shell: bash
        env:
          GH_TOKEN: ${{ github.token }}
          TAG: ${{ github.ref_name }}
        run: |
          set -euo pipefail

          # download-artifact@v4 nests each artifact under its own directory, so
          # the archives are artifacts/<asset>/<file>.
          mapfile -t files < <(find artifacts -type f \( -name '*.tar.gz' -o -name '*.zip' \))
          printf 'asset: %s\n' "${files[@]}"

          prerelease=()
          case "$TAG" in *-*) prerelease=(--prerelease) ;; esac

          # Create the release on the first run; on a re-run, add/replace assets
          # on the release that is already there.
          if gh release view "$TAG" --repo "$GITHUB_REPOSITORY" >/dev/null 2>&1; then
            gh release upload "$TAG" "${files[@]}" --repo "$GITHUB_REPOSITORY" --clobber
          else
            gh release create "$TAG" "${files[@]}" \
              --repo "$GITHUB_REPOSITORY" \
              --title "tsunagi $TAG" \
              --generate-notes \
              --verify-tag \
              "${prerelease[@]}"
          fi