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

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

      # Deliberately AFTER clippy + test, not before.
      #
      # It's the cheapest check, so fail-fast ordering would normally put it first —
      # but there is no Rust toolchain on the workstation (the desktop lane is
      # verified entirely here), so a formatting nit failing first SKIPS clippy and
      # the tests, and one CI cycle teaches nothing but whitespace. Running it here
      # means every push reports its real problems too. Still before the ~20-40 min
      # bundle build, so a fmt failure doesn't burn that.
      - name: Rust format check
        run: cargo fmt --check
        working-directory: desktop/src-tauri

      # Frontend already built above; skip the beforeBuildCommand rebuild.
      #
      # createUpdaterArtifacts is applied only when a signing key exists (M10.9):
      # tauri FAILS the build if it's asked to produce updater artifacts with no key,
      # so making it conditional is what lets the pipeline stay green before the
      # operator has added the secret. With the key present, each bundle gets a
      # `.sig` beside it — the file the updater actually verifies against.
      - name: Tauri build (deb + AppImage)
        env:
          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
        run: |
          updater='{}'
          if [ -n "${TAURI_SIGNING_PRIVATE_KEY:-}" ]; then
            echo "Signing key present — producing updater artifacts."
            updater='{"bundle":{"createUpdaterArtifacts":true}}'
          else
            echo "No TAURI_SIGNING_PRIVATE_KEY — building unsigned, no updater artifacts."
          fi
          version="$(sh ../packaging/build-version.sh)"
          echo "Building version $version"
          cargo tauri build \
            --config '{"build":{"beforeBuildCommand":""}}' \
            --config "{\"version\":\"$version\"}" \
            --config "$updater"
        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

      # MUST run after de-bundling, not before. The step above DELETES the AppImage
      # and repackages it, so the signature tauri produced during the build now
      # describes a file that no longer exists. Publishing that stale .sig would make
      # every Linux update fail verification — and the error names a signature
      # mismatch, which points nowhere near "a later build step rewrote the file".
      # Windows needs no equivalent: nothing post-processes the NSIS installer.
      - name: Re-sign the de-bundled AppImage
        env:
          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
        run: |
          if [ -z "${TAURI_SIGNING_PRIVATE_KEY:-}" ]; then
            echo "No signing key — the build produced no signature to replace."
            exit 0
          fi
          appimage="$(find target/release/bundle/appimage -name '*.AppImage' -type f | head -1)"
          [ -n "$appimage" ] || { echo "ERROR: no AppImage found to re-sign" >&2; exit 1; }
          rm -f "$appimage.sig"
          cargo tauri signer sign "$appimage"
          [ -s "$appimage.sig" ] || { echo "ERROR: re-signing produced no .sig" >&2; exit 1; }
          echo "Re-signed $(basename "$appimage")"
        working-directory: desktop/src-tauri

      # install.sh hands the .deb to every Debian/Ubuntu user, so the package's
      # Depends must be right BEFORE a release exists. Prints the generated
      # control file and cross-checks it against what the ELF actually needs
      # (dpkg-shlibdeps).
      #
      # We deliberately do NOT set bundle.linux.deb.depends: run 2872 showed
      # tauri already infers exactly libwebkit2gtk-4.1-0 + libgtk-3-0, so
      # declaring them again only produced a control file listing each twice.
      # This step is the guard instead — if tauri's inference ever stops
      # covering what the binary links, the build fails here.
      - name: Verify the .deb
        run: bash desktop/packaging/deb/verify.sh

      # Repackage the binary just built into a native pacman package, so Arch /
      # CachyOS gets a real native install from install.sh instead of the AppImage
      # fallback — without a second Rust build or an Arch CI image. Safe because
      # nothing is bundled: the binary resolves webkit/gtk by soname, which is
      # identical across the two distros. Can't be pacman-tested here (Debian
      # runner), so the step logs .PKGINFO + the full file listing for audit.
      - name: Package for Arch (pacman)
        run: bash desktop/packaging/arch/package-prebuilt.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
            desktop/src-tauri/target/release/bundle/arch/*.pkg.tar.*
          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

      # The rolling DEVELOPMENT channel (M10.9): a release whose tag never moves, so
      # the updater has a permanent URL to read — Forgejo has no
      # /releases/latest/download/<asset> route, so "newest" can't be named in a URL.
      #
      # Gated on the signing key INSIDE the script rather than with an `if:`, because
      # the secrets context isn't reliably available to step conditions. Publishing
      # bundles the app would then refuse to verify is worse than publishing nothing:
      # it looks like a working feed.
      - name: Publish to the dev channel
        if: github.ref == 'refs/heads/dev'
        env:
          GITHUB_TOKEN: ${{ github.token }}
          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
          RELEASE_TAG: dev
          RELEASE_PRERELEASE: "true"
        run: |
          if [ -z "${TAURI_SIGNING_PRIVATE_KEY:-}" ]; then
            echo "No TAURI_SIGNING_PRIVATE_KEY — skipping the dev channel publish."
            exit 0
          fi
          bash desktop/packaging/publish-release.sh

  # Windows installer, CROSS-COMPILED from Linux — there is no Windows build host.
  # A Windows container can't run on a Linux host (containers share the host
  # kernel), so cross-compiling is the only route without Windows hardware:
  # cargo-xwin + LLVM's lld-link + makensis are Linux programs that emit Windows
  # PE output. That toolchain is why this needs its own image rather than ci-tauri.
  #
  # NSIS only. `.msi` needs WiX v3, which is a Windows program — Tauri: ".msi
  # installers can only be created on Windows". It returns if a Windows node does.
  #
  # A separate job, so a Windows-side failure never blocks the Linux artifacts that
  # are the primary product today. Tauri calls this path "not tested as much" and a
  # last resort, and nothing here can LAUNCH a Windows binary — green means it
  # built, not that it runs. A real-machine check stays mandatory before trusting it.
  windows:
    name: Windows installer (cross-compiled)
    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-win:1.97
    steps:
      - uses: actions/checkout@v6

      # Same reason as the Linux job: generate_context! embeds the built frontend
      # at compile time, so it must exist before cargo runs.
      - name: Build the shared frontend
        run: npm ci && npm run build
        working-directory: frontend

      # tauri-build generates a Windows Resource file and needs `icons/icon.ico`,
      # which the repo doesn't carry — only the PNG set the Linux bundles use.
      # Generating it from the committed 1024px source keeps one icon of record
      # instead of a hand-made .ico that could silently drift from the brand art.
      # Linux doesn't need this step, which is why it lives here and not in `build`.
      - name: Generate the Windows icon set
        run: cargo tauri icon app-icon.png
        working-directory: desktop/src-tauri

      # --runner cargo-xwin swaps cargo for the cross-compiling driver (it supplies
      # the MSVC CRT/SDK, pre-warmed into the image, and links with lld-link).
      # Frontend already built above; skip the beforeBuildCommand rebuild.
      - name: Tauri build (NSIS installer)
        env:
          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
        run: |
          version="$(sh ../packaging/build-version.sh)"
          echo "Building version $version"
          updater='{}'
          if [ -n "${TAURI_SIGNING_PRIVATE_KEY:-}" ]; then
            updater='{"bundle":{"createUpdaterArtifacts":true}}'
          fi
          cargo tauri build \
            --runner cargo-xwin \
            --target x86_64-pc-windows-msvc \
            --bundles nsis \
            --config '{"build":{"beforeBuildCommand":""}}' \
            --config "{\"version\":\"$version\"}" \
            --config "$updater"
        working-directory: desktop/src-tauri

      - name: Upload installer
        continue-on-error: true
        uses: actions/upload-artifact@v3
        with:
          name: thoughtsync-windows
          path: desktop/src-tauri/target/x86_64-pc-windows-msvc/release/bundle/nsis/*.exe
          if-no-files-found: warn

      # Publishes to the SAME release as the Linux job. Safe to run twice: the
      # script reuses an existing release (409) and nullglob means each job uploads
      # only the bundles present in its own workspace.
      - name: Publish release
        if: startsWith(github.ref, 'refs/tags/v')
        env:
          GITHUB_TOKEN: ${{ github.token }}
        run: bash desktop/packaging/publish-release.sh

      # The rolling DEVELOPMENT channel (M10.9): a release whose tag never moves, so
      # the updater has a permanent URL to read — Forgejo has no
      # /releases/latest/download/<asset> route, so "newest" can't be named in a URL.
      #
      # Gated on the signing key INSIDE the script rather than with an `if:`, because
      # the secrets context isn't reliably available to step conditions. Publishing
      # bundles the app would then refuse to verify is worse than publishing nothing:
      # it looks like a working feed.
      - name: Publish to the dev channel
        if: github.ref == 'refs/heads/dev'
        env:
          GITHUB_TOKEN: ${{ github.token }}
          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
          RELEASE_TAG: dev
          RELEASE_PRERELEASE: "true"
        run: |
          if [ -z "${TAURI_SIGNING_PRIVATE_KEY:-}" ]; then
            echo "No TAURI_SIGNING_PRIVATE_KEY — skipping the dev channel publish."
            exit 0
          fi
          bash desktop/packaging/publish-release.sh

  # The updater manifest, written AFTER both bundle jobs — they run in separate
  # workspaces and neither can see the other's output, but one latest.json has to
  # describe both platforms. Building it inside either job would silently omit the
  # other, and a missing platform reads to a user as "no update available" rather
  # than as a broken feed.
  #
  # Reads what actually landed on the channel release, so it can never advertise a
  # bundle that failed to upload.
  manifest:
    name: Update manifest
    needs: [build, windows]
    if: github.ref == 'refs/heads/dev' || startsWith(github.ref, 'refs/tags/v')
    runs-on: python-ci
    container:
      image: git.fabledsword.com/bvandeusen/ci-tauri:1.97
    steps:
      - uses: actions/checkout@v6

      - name: Write and publish latest.json
        env:
          GITHUB_TOKEN: ${{ github.token }}
          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
        run: |
          if [ -z "${TAURI_SIGNING_PRIVATE_KEY:-}" ]; then
            echo "No TAURI_SIGNING_PRIVATE_KEY — nothing was signed, so there is no"
            echo "manifest to write. Add the secret to enable in-app updates."
            exit 0
          fi
          # The SAME helper the bundles were built with — a second derivation here
          # could drift, and a manifest whose version doesn't match the binary it
          # points at is an updater that never settles.
          version="$(sh desktop/packaging/build-version.sh)"
          if [ "${GITHUB_REF_NAME}" = "dev" ]; then
            export RELEASE_TAG=dev
            export RELEASE_NOTES="Development build from ${GITHUB_SHA}"
            # Rolling channel: drop the previous build's bundles once the manifest
            # points at this one. Nothing can reach them, and they're ~100 MB a push.
            export PRUNE_OLD_ASSETS=true
            APP_VERSION="$version" bash desktop/packaging/write-manifest.sh
          else
            export RELEASE_TAG="${GITHUB_REF_NAME}"
            export RELEASE_NOTES="ThoughtSync ${GITHUB_REF_NAME}"
            # Twice: once onto the versioned release itself, and once onto the
            # permanent `stable` pointer the app actually reads. Same manifest both
            # times — its URLs point at the versioned assets either way.
            APP_VERSION="$version" bash desktop/packaging/write-manifest.sh
            APP_VERSION="$version" MANIFEST_TAG=stable bash desktop/packaging/write-manifest.sh
          fi