# Tauri desktop (Linux) build — SEPARATE from ci.yml on purpose: this is a heavy
# Rust + AppImage build (~20-40 min) that should NOT run on backend/frontend-only
# pushes. Scoped to desktop/** (+ this file). Produces the .deb and .AppImage.
#
# Toolchain comes from the ci-tauri image (Rust + Node + WebKitGTK 4.1 + tauri-cli);
# runs-on is just a registered scheduling label (Label Model B), not a per-purpose
# runner. The frontend is built here because tauri's generate_context! embeds it.
name: Desktop (Tauri)

on:
  push:
    branches: [dev, main]
    tags: ["v*"]
    paths:
      - "desktop/**"
      # The desktop app embeds the frontend, and the data seam / Tauri bridge are
      # what the offline core rides on — rebuild the app when those change too.
      - "frontend/src/adapters/**"
      - "frontend/src/desktop/**"
      - ".forgejo/workflows/desktop.yml"
  workflow_dispatch:

concurrency:
  group: desktop-${{ github.ref }}
  cancel-in-progress: ${{ !startsWith(github.ref, 'refs/tags/') }}

permissions:
  # write (not read) so the tag build can publish a Release with the bundles
  # attached (the "Publish release" step). Read is enough for dev/main builds,
  # but the token scope is per-workflow, so it's set once here.
  contents: write

jobs:
  build:
    name: Tauri desktop (Linux)
    if: github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')
    runs-on: python-ci
    container:
      image: git.fabledsword.com/bvandeusen/ci-tauri:1.97
    env:
      # AppImage tooling (linuxdeploy) FUSE-mounts itself by default; CI containers
      # have no /dev/fuse, so tell it to extract-and-run instead. Without this the
      # AppImage bundle step fails with a FUSE error.
      APPIMAGE_EXTRACT_AND_RUN: "1"
    steps:
      - uses: actions/checkout@v6

      # tauri's generate_context! embeds the built frontend at compile time, so the
      # frontend must exist before any cargo compile (clippy/test/build), not just
      # at bundle time.
      - name: Build the shared frontend
        run: npm ci && npm run build
        working-directory: frontend

      - name: Rust format check
        run: cargo fmt --check
        working-directory: desktop/src-tauri

      - name: Clippy
        run: cargo clippy --all-targets -- -D warnings
        working-directory: desktop/src-tauri

      - name: Test
        run: cargo test
        working-directory: desktop/src-tauri

      # Frontend already built above; skip the beforeBuildCommand rebuild.
      - name: Tauri build (deb + AppImage)
        run: cargo tauri build --config '{"build":{"beforeBuildCommand":""}}'
        working-directory: desktop/src-tauri

      # Tauri's AppImage bundles the build host's graphics/display libs
      # (libEGL/libGL/libdrm/libgbm/libwayland-*), which clash with end-user GPU
      # drivers and abort to a black window (EGL_BAD_PARAMETER, issue 2021).
      # Strip that host-coupled stack so the app uses the running system's
      # graphics libs; webkit/gtk stay bundled. Runs from the repo root (the
      # script resolves its own paths), overwriting the AppImage in place.
      - name: De-bundle AppImage graphics libraries
        run: bash desktop/packaging/appimage/debundle-graphics.sh

      # Make the built .deb + .AppImage downloadable from the run (for hand-testing).
      # continue-on-error: the Forgejo artifact backend may not be configured yet; a
      # failed upload must not fail the build itself.
      # Forgejo doesn't support the v4 artifact protocol (@actions/artifact v2+),
      # so pin v3, which uses the older protocol the instance accepts.
      - name: Upload bundles
        continue-on-error: true
        uses: actions/upload-artifact@v3
        with:
          name: thoughtsync-linux
          path: |
            desktop/src-tauri/target/release/bundle/appimage/*.AppImage
            desktop/src-tauri/target/release/bundle/deb/*.deb
          if-no-files-found: warn

      # Tag builds only: publish a real, versioned Fabled-Git Release with the
      # AppImage + .deb attached — the stable fetch target the install script and
      # the in-app updater consume (Actions artifacts above are ephemeral/test).
      # Cutting the tag is the operator's action (rule 2); this only publishes a
      # Release for a tag that already exists. Dormant on dev/main pushes.
      - name: Publish release
        if: startsWith(github.ref, 'refs/tags/v')
        env:
          GITHUB_TOKEN: ${{ github.token }}
        run: bash desktop/packaging/publish-release.sh