feat(linux): packaged AppImage + release workflow (#168)

.github/workflows/release-linux.yml

@@ -0,0 +1,110 @@
+name: Release Linux AppImage
+
+# Phase 2 of #168: build the self-contained deckd AppImage on a Linux runner
+# and attach it to the GitHub release.
+#
+# The build itself is `just build-linux-appimage` — the same recipe a
+# contributor runs locally (docs/GUIDE.md § "Linux AppImage") — so CI and the
+# documented path can't drift. This job only supplies the runner, the
+# toolchain, and the publish step.
+#
+# Two architectures, one matrix: x86_64 on ubuntu-24.04 (arm64 hosted runners
+# are free for public repos). aarch64 has no evdev-binary wheel, so the recipe
+# source-builds python-evdev before freezing.
+#
+# The AppImage is unsigned; users run it directly (`chmod +x`, then execute).
+# The root-only uinput step rides along as an install helper bundled inside the
+# AppImage at usr/share/deckd/integration/install-system-integration.sh.
+
+on:
+  push:
+    tags: ["v*"]
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Release tag to attach the AppImage to (e.g. v0.1.0)"
+        required: true
+        type: string
+
+permissions:
+  contents: write
+
+# Serialise publishes per tag: a second run must not `--clobber` an AppImage
+# the first is still uploading. In-flight runs are not cancelled.
+concurrency:
+  group: release-linux-${{ github.event.inputs.tag || github.ref_name }}
+  cancel-in-progress: false
+
+jobs:
+  appimage:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - runner: ubuntu-24.04
+            arch: x86_64
+          - runner: ubuntu-24.04-arm
+            arch: aarch64
+    runs-on: ${{ matrix.runner }}
+    env:
+      RELEASE_TAG: ${{ github.event.inputs.tag || github.ref_name }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: npm
+          cache-dependency-path: client/package-lock.json
+
+      - uses: extractions/setup-just@v4
+
+      # librsvg2-bin gives the recipe rsvg-convert for the icon; build-essential
+      # provides the compiler evdev's source build needs on aarch64.
+      - name: Install build tools
+        run: sudo apt-get update && sudo apt-get install -y librsvg2-bin build-essential
+
+      # evdev (uinput) + dbus-fast ([dbus]) + PyInstaller. Installing these
+      # first also stops the recipe's `uv pip install` fallback from firing.
+      - name: Install Python deps
+        run: pip install -e ".[uinput,dbus,packaging]"
+
+      # `npm run build` already runs `tsc --noEmit`, so a type error fails
+      # the release before a broken bundle is frozen in.
+      - name: Build client
+        run: npm ci && npm run build
+        working-directory: client
+
+      # The tag (minus a leading `v`) is the release version, so the AppImage
+      # name and the daemon's version agree with the tag.
+      - name: Resolve version from the tag
+        run: echo "DECKD_VERSION=${RELEASE_TAG#v}" >> "$GITHUB_ENV"
+
+      - name: Build AppImage
+        run: just build-linux-appimage
+
+      # Boot the frozen payload: --help parses args and exits before the
+      # server starts, which proves the bundle's interpreter and imports work.
+      - name: Smoke-test the AppImage
+        run: APPIMAGE_EXTRACT_AND_RUN=1 dist/deckd-*.AppImage --help >/dev/null
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: deckd-linux-appimage-${{ matrix.arch }}
+          path: |
+            dist/deckd-*.AppImage
+            dist/deckd-install-system-integration.sh
+          if-no-files-found: error
+
+      - name: Attach the AppImage to the release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh release view "$RELEASE_TAG" >/dev/null 2>&1 \
+            || gh release create "$RELEASE_TAG" --title "$RELEASE_TAG" --generate-notes
+          gh release upload "$RELEASE_TAG" \
+            dist/deckd-*.AppImage dist/deckd-install-system-integration.sh --clobber

Justfile

@@ -482,6 +482,88 @@ build-macos-dmg: build-macos-app
         -ov -format UDZO "dist/deckd-${version}.dmg"
     echo "Built dist/deckd-${version}.dmg"
 
+# Build the self-contained Linux AppImage (dist/deckd-<version>-<arch>.AppImage,
+# issue #168). Linux only: appimagetool wraps a PyInstaller onedir tree in a
+# squashfs. Installs the [uinput,dbus,packaging] extras on demand and builds
+# the client first if it's missing. The udev rule and focus-watcher sources ride
+# along under usr/share/deckd/integration for the install helper.
+build-linux-appimage:
+    #!/usr/bin/env bash
+    set -euo pipefail
+    if [ "$(uname)" != "Linux" ]; then
+        echo "build-linux-appimage needs Linux; an AppImage can't be built on $(uname)." >&2
+        exit 1
+    fi
+    arch="$(uname -m)"
+    if ! command -v pyinstaller >/dev/null 2>&1; then
+        echo "installing packaging deps..."
+        uv pip install -e ".[uinput,dbus,packaging]"
+    fi
+    if [ "$arch" != "x86_64" ]; then
+        echo "note: $arch has no evdev-binary wheel; ensuring a source build." >&2
+        PYTHON="$(command -v python)" bash scripts/install_evdev_source.sh \
+            || echo "warn: evdev source build failed; key injection will no-op." >&2
+    fi
+    if [ ! -f client/dist/index.html ]; then
+        echo "client/dist missing; building client..."
+        just build-client
+    fi
+    pyinstaller --noconfirm --clean packaging/linux/deckd.spec
+
+    version="${DECKD_VERSION:-$(just version)}"
+    work="$(mktemp -d)"
+    trap 'rm -rf "$work"' EXIT
+    appdir="$work/deckd.AppDir"
+    mkdir -p "$appdir/usr/bin" "$appdir/usr/share/deckd/integration/gnome-shell" \
+             "$appdir/usr/share/deckd/integration/kwin-script"
+    cp -R dist/deckd/. "$appdir/usr/bin/"
+    cp packaging/udev/70-deckd-uinput.rules "$appdir/usr/share/deckd/integration/"
+    cp -R packaging/gnome-shell/deckd-focus@local "$appdir/usr/share/deckd/integration/gnome-shell/"
+    cp -R packaging/kwin-script/deckd-focus "$appdir/usr/share/deckd/integration/kwin-script/"
+    cp packaging/linux/install-system-integration.sh "$appdir/usr/share/deckd/integration/"
+    cp packaging/linux/appimage/AppRun "$appdir/AppRun"
+    chmod +x "$appdir/AppRun"
+    cp packaging/linux/appimage/deckd.desktop "$appdir/"
+    # appimagetool wants deckd.png (or deckd.svg) at the AppDir root.
+    if command -v rsvg-convert >/dev/null 2>&1; then
+        rsvg-convert -w 512 -h 512 -o "$appdir/deckd.png" client/public/icon.svg
+    elif command -v magick >/dev/null 2>&1; then
+        magick -background none client/public/icon.svg -resize 512x512 "$appdir/deckd.png"
+    elif command -v convert >/dev/null 2>&1; then
+        convert -background none client/public/icon.svg -resize 512x512 "$appdir/deckd.png"
+    else
+        cp client/public/icon.svg "$appdir/deckd.svg"
+    fi
+
+    tooling="${XDG_CACHE_HOME:-$HOME/.cache}/deckd/appimagetool-${arch}.AppImage"
+    if [ ! -x "$tooling" ]; then
+        echo "fetching appimagetool (${arch})..."
+        mkdir -p "$(dirname "$tooling")"
+        curl -fsSL -o "$tooling" \
+            "https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-${arch}.AppImage"
+        chmod +x "$tooling"
+    fi
+    export ARCH="$arch"
+    APPIMAGE_EXTRACT_AND_RUN=1 "$tooling" "$appdir" "dist/deckd-${version}-${arch}.AppImage"
+    cp packaging/linux/install-system-integration.sh dist/deckd-install-system-integration.sh
+    echo "Built dist/deckd-${version}-${arch}.AppImage (+ dist/deckd-install-system-integration.sh)"
+
+# Stage the integration assets from a checkout and run the privileged helper
+# for the current user (issue #168): udev rule + input group (root), plus the
+# focus watcher and an XDG autostart entry (user). Prompts for sudo. Useful for
+# a source install and for testing the helper without building an AppImage.
+# Extra args pass through (e.g. `--desktop gnome`, `--uninstall`).
+install-system-integration *args:
+    #!/usr/bin/env bash
+    set -euo pipefail
+    stage="$(mktemp -d)"
+    trap 'rm -rf "$stage"' EXIT
+    mkdir -p "$stage/gnome-shell" "$stage/kwin-script"
+    cp packaging/udev/70-deckd-uinput.rules "$stage/"
+    cp -R packaging/gnome-shell/deckd-focus@local "$stage/gnome-shell/"
+    cp -R packaging/kwin-script/deckd-focus "$stage/kwin-script/"
+    sudo packaging/linux/install-system-integration.sh --assets "$stage" {{args}}
+
 # Run the Nix flake checks: builds packages.deckd and the focus-watcher
 # bundles, evaluates the NixOS + home-manager modules, unit-tests the
 # activation scripts in a sandbox, and boots the packaged daemon on

README.md

@@ -74,7 +74,7 @@ Pre-alpha, but usable day-to-day. Here's what deckd can do today and what's stil
 - [ ] **Multi-daemon chooser** — pair and pick between several desktops.
 - [ ] **Reliable web-app detection** — a browser extension reporting the active tab's real URL, so sites match by domain/path instead of the current window-title heuristic ([#90](https://github.com/jonocodes/deckd/issues/90)).
 - [ ] **Windows support**
-- [ ] **Packing and deployment** ([#165](https://github.com/jonocodes/deckd/issues/165))
+- [ ] **Packing and deployment** — self-contained macOS DMG ([#165](https://github.com/jonocodes/deckd/issues/165)) and Linux AppImage ([#168](https://github.com/jonocodes/deckd/issues/168))
 
 ## Inspiration and Comparison
 

daemon/deckd/app_bundle.py

@@ -0,0 +1,116 @@
+"""Platform-independent helpers for the packaged desktop artifacts.
+
+Both the macOS app bundle (#165) and the Linux AppImage (#168) need the same
+mechanical pieces: locate the frozen payload, find the bundled client and
+layouts, seed layouts into a writable directory on first run, read the version
+seam, and build the daemon argv. Those live here so they can be unit-tested on
+any host, independent of the platform that ships them.
+
+``deckd.macos_app`` and ``deckd.linux_app`` re-export what their wrappers need.
+"""
+from __future__ import annotations
+
+import os
+import shutil
+import sys
+from pathlib import Path
+
+DEFAULT_PORT = 8765
+
+
+def resource_root() -> Path:
+    """Directory holding the bundled payload.
+
+    PyInstaller sets ``sys._MEIPASS`` to the onedir payload; in a source
+    checkout we fall back to the repo root so the packaging entry points can be
+    exercised without freezing.
+    """
+    meipass = getattr(sys, "_MEIPASS", None)
+    if meipass:
+        return Path(meipass)
+    return Path(__file__).resolve().parents[2]
+
+
+def client_dist(root: Path) -> Path:
+    """Bundled client build (``client/dist`` copied to ``web``)."""
+    return root / "web"
+
+
+def layouts_src(root: Path) -> Path:
+    """Bundled layouts directory."""
+    return root / "layouts"
+
+
+def overlay_src(root: Path, suffix: str) -> Path:
+    """Bundled per-platform overlay layouts (``layouts.<suffix>``)."""
+    return root / f"layouts.{suffix}"
+
+
+def bundle_version(pyproject: Path | None = None) -> str:
+    """The version stamped into the artifact.
+
+    ``DECKD_VERSION`` wins when set — release CI passes the git tag (minus a
+    leading ``v``), so the tag is the single source for a release and the
+    artifact name matches. Local builds fall back to ``version`` in
+    ``pyproject.toml``.
+    """
+    override = os.environ.get("DECKD_VERSION", "").strip()
+    if override:
+        return override
+    path = pyproject or Path(__file__).resolve().parents[2] / "pyproject.toml"
+    for line in path.read_text().splitlines():
+        if line.startswith("version = "):
+            return line.split("=", 1)[1].strip().strip('"')
+    raise ValueError(f"no version found in {path}")
+
+
+def seed_layouts(
+    src: Path, dest: Path, *, overlay: Path | None = None, overlay_suffix: str = "macos"
+) -> bool:
+    """Copy bundled layouts into the writable data dir on first run.
+
+    Returns ``True`` when it seeded, ``False`` when ``dest`` already existed.
+    An existing directory is never overwritten, so a user's hand-edited
+    layouts survive an upgrade (mirrors the Nix module's seed-once behaviour).
+    The per-platform overlay is copied to the sibling ``<dest>.<suffix>``
+    directory the daemon auto-discovers.
+    """
+    if dest.exists():
+        return False
+    dest.parent.mkdir(parents=True, exist_ok=True)
+    shutil.copytree(src, dest)
+    if overlay is not None and overlay.is_dir():
+        overlay_dest = dest.parent / f"{dest.name}.{overlay_suffix}"
+        if not overlay_dest.exists():
+            shutil.copytree(overlay, overlay_dest)
+    return True
+
+
+def app_argv(
+    *,
+    layouts_dir: Path,
+    client_dist: Path,
+    port: int = DEFAULT_PORT,
+    bind: list[str] | None = None,
+    password_file: Path | None = None,
+    log_file: Path | None = None,
+    verbose: bool = False,
+) -> list[str]:
+    """Build the daemon argv the packaged entry points pass to ``parse_args``.
+
+    Localhost-only unless ``bind`` is given, so the default stays safe.
+    """
+    argv = [
+        "--layouts-dir", str(layouts_dir),
+        "--client-dist", str(client_dist),
+        "--port", str(port),
+    ]
+    for addr in bind or []:
+        argv += ["--bind", addr]
+    if password_file is not None:
+        argv += ["--password-file", str(password_file)]
+    if log_file is not None:
+        argv += ["--log-file", str(log_file)]
+    if verbose:
+        argv.append("--verbose")
+    return argv