# A release, from a signed tag vX.Y.Z (stable, main) or vX.Y.Z-beta.N (a beta, marked as a
# pre-release): the Linux packages (.deb and AppImage) built with the LLeMbas CLI inside,
# SHA256SUMS over them, and the GitHub Release with the tag message as its notes. LLeMbas Desktop is developed on Gitea, which mirrors its commits and tags here; the builds
# happen here because they need a full Rust and WebKitGTK toolchain.
name: release
on:
  push:
    tags: ["v*"]
  workflow_dispatch:
    inputs:
      tag:
        description: "The tag, e.g. v0.1.0"
        required: true
      replace:
        description: "Replace a release that already exists for this tag (people who installed it get no update)"
        type: boolean
        default: false

permissions:
  contents: write

jobs:
  linux:
    runs-on: ubuntu-22.04
    timeout-minutes: 90
    env:
      TAG: ${{ inputs.tag || github.ref_name }}
      # linuxdeploy is itself an AppImage; runners have no FUSE.
      APPIMAGE_EXTRACT_AND_RUN: "1"
    steps:
      - uses: actions/checkout@v5
        with:
          ref: ${{ inputs.tag || github.ref }}
          fetch-depth: 0
      - name: The tag object, with its message
        run: git fetch --force origin "refs/tags/$TAG:refs/tags/$TAG"
      - name: The tag names this version
        run: |
          version="$(sed -n -E 's/^version = "([^"]+)"$/\1/p' src-tauri/Cargo.toml | head -n1)"
          [ "v$version" = "$TAG" ] || { echo "Cargo.toml says $version, the tag is $TAG" >&2; exit 1; }
          echo "VERSION=$version" >> "$GITHUB_ENV"
      - name: System libraries (WebKitGTK, the tray, AppImage)
        run: |
          sudo apt-get update
          sudo apt-get install -y libwebkit2gtk-4.1-dev libayatana-appindicator3-dev librsvg2-dev libxdo-dev file
      - uses: actions-rust-lang/setup-rust-toolchain@v1
        with:
          cache-workspaces: src-tauri
      - name: The bundled LLeMbas CLI, verified
        run: scripts/fetch-cli.sh
      - name: Tauri's CLI
        run: cargo install tauri-cli --version "^2" --locked
      - name: Build
        run: cargo tauri build --bundles deb,appimage
      # Debian sorts 1.0.0-beta.1 *above* 1.0.0 (what follows the dash is a package revision), so a
      # beta's package would make the release after it look like a downgrade, and apt would keep the
      # beta. A beta's package version says ~beta, which sorts below.
      - name: A beta's .deb sorts below its release
        run: |
          deb="$(ls src-tauri/target/release/bundle/deb/*.deb)"
          have="$(dpkg-deb -f "$deb" Version)"
          want="${VERSION/-/\~}"
          if [ "$have" != "$want" ]; then
            echo "repacking $deb: Version $have -> $want"
            work="$(mktemp -d)"
            dpkg-deb -R "$deb" "$work/pkg"
            sed -i "s/^Version: .*/Version: $want/" "$work/pkg/DEBIAN/control"
            dpkg-deb --root-owner-group -b "$work/pkg" "$deb"
          fi
          base="${VERSION%%-*}"
          if [ "$VERSION" != "$base" ]; then
            dpkg --compare-versions "$(dpkg-deb -f "$deb" Version)" lt "$base" \
              || { echo "the beta's package does not sort below $base" >&2; exit 1; }
          fi
      - name: Collect the files and SHA256SUMS
        run: |
          mkdir dist
          cp src-tauri/target/release/bundle/deb/*.deb src-tauri/target/release/bundle/appimage/*.AppImage dist/
          cd dist
          # Written beside the folder first: inside it, the glob would list SHA256SUMS itself.
          { echo "# llembas-desktop $VERSION"; sha256sum -- *; } > ../SHA256SUMS
          mv ../SHA256SUMS .
          cat SHA256SUMS
      - name: Publish the GitHub Release
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          git tag -l --format='%(contents)' "$TAG" | sed '/-----BEGIN SSH SIGNATURE-----/,$d' > notes.md
          # A version is released once. Installing the same version again over a broken one is a
          # no-op for apt ("already the newest version") and the updater offers nothing, so a fix
          # is a new version -- never the old one re-released. Replacing is a deliberate act: a
          # run by hand with `replace`.
          if gh release view "$TAG" --repo "$GITHUB_REPOSITORY" >/dev/null 2>&1; then
            if [ "${{ inputs.replace || false }}" != "true" ]; then
              echo "A release for $TAG exists already. Release the fix as a new version." >&2
              exit 1
            fi
            gh release delete "$TAG" --repo "$GITHUB_REPOSITORY" --yes
          fi
          pre=()
          case "$VERSION" in *-*) pre=(--prerelease) ;; esac
          gh release create "$TAG" --repo "$GITHUB_REPOSITORY" --verify-tag "${pre[@]}" \
            --title "LLeMbas Desktop $VERSION" --notes-file notes.md dist/*