Add debian/ubuntu build instructions and scripts

dev/README.md

@@ -8,7 +8,7 @@ git submodule update --init --recursive
 Platform-specific build instructions:
 - [macOS](macos/README.md)
 - [Windows](windows/README.md)
-- Linux: See [GitHub Actions workflow](../.github/workflows/test.yml) - install deps from `debian/control`, then CMake build
+- [Linux](linux/README.md)
 
 ## Web Debugger
 

dev/linux/README.md

@@ -0,0 +1,60 @@
+# Building Jellyfin Desktop on Linux
+
+## Quick Start
+
+### Setup and build
+
+```bash
+dev/linux/setup.sh   # First time: install dependencies (Debian/Ubuntu)
+dev/linux/build.sh   # Configure, build, and optionally install
+```
+
+## Prerequisites
+
+- **Debian/Ubuntu** (or derivative) with `apt-get`
+
+`setup.sh` installs everything else:
+
+- Build tooling: `devscripts`, `equivs`, `ninja-build`, `cmake`
+- Build-time packages from [`../../debian/control`](../../debian/control)'s `Build-Depends`, including the required Qt6 modules (`qt6-base-dev`, `qt6-base-private-dev`, `qt6-declarative-dev`, `qt6-webengine-dev`, `qt6-wayland-dev`), `libmpv-dev`, `libcec-dev`, and the rest of the native toolchain
+- Runtime QML plugins from `debian/control`'s `Depends:` field (`qml6-module-qtwebengine`, `qml6-module-qtwebchannel`, `qml6-module-qtquick-controls`, `qml6-module-qtquick-window`, `qml6-module-qtqml-workerscript`, `qml6-module-qtquick-templates`, `qml6-module-qt-labs-platform`), none of these are pulled in transitively by the `-dev` packages above, so they're installed separately
+
+## Install
+
+`build.sh` asks for confirmation separately before each `sudo` step:
+
+1. **Install Binary** @ `/usr/local/bin/jellyfin-desktop`
+2. **Desktop integration** (`.desktop` file, icon, appdata metadata) @ `/usr/local/share/{applications,icons,metainfo}/`
+
+Answer `n` to either prompt to skip it. The built binary at `build/src/jellyfin-desktop` still runs without installing.
+
+## Directory Structure
+
+- `build/` - Build output (safe to delete)
+- `build/src/jellyfin-desktop` - Built executable
+
+## Scripts
+
+- `setup.sh` - Install build and runtime dependencies
+- `build.sh` - Initialize submodules, configure, build, and optionally install
+
+## Clean Build
+
+```bash
+rm -rf build
+dev/linux/build.sh
+```
+
+## Troubleshooting
+
+### Missing Qt6 packages
+
+```
+error: Qt6 dev packages not found. Run setup.sh first
+```
+
+Run `dev/linux/setup.sh`.
+
+## Notes
+
+- Data/config/cache/log file locations are documented in the [main README](../../README.md#file-locations)

dev/linux/build.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+# Jellyfin Desktop - Linux build & install script
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${0}")" && pwd)"
+PROJECT_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
+BUILD_DIR="${PROJECT_ROOT}/build"
+PREFIX="/usr/local"
+
+confirm() {
+	local reply
+	read -r -p "${1} [y/N] " reply
+	[[ "${reply}" =~ ^[Yy]([Ee][Ss])?$ ]]
+}
+
+if ! pkg-config --exists Qt6Core 2>/dev/null; then
+	echo "error: Qt6 dev packages not found. Run setup.sh first" >&2
+	exit 1
+fi
+
+# Submodules (e.g. external/mpvqt) are required for -DUSE_STATIC_MPVQT=ON.
+if [[ -z "$(ls -A "${PROJECT_ROOT}/external/mpvqt" 2>/dev/null)" ]]; then
+	echo "Initializing submodules..."
+	git -C "${PROJECT_ROOT}" submodule update --init --recursive
+fi
+
+if [[ -f "${BUILD_DIR}/CMakeCache.txt" ]]; then
+	cached_source="$(sed -n 's/^CMAKE_HOME_DIRECTORY:INTERNAL=//p' "${BUILD_DIR}/CMakeCache.txt")"
+	if [[ "${cached_source}" != "${PROJECT_ROOT}" ]]; then
+		echo "Build directory was configured from ${cached_source}, removing stale build/"
+		rm -rf "${BUILD_DIR}"
+	fi
+fi
+
+echo "Configuring..."
+cmake -B "${BUILD_DIR}" -G Ninja \
+	-DCMAKE_BUILD_TYPE=Release \
+	-DUSE_STATIC_MPVQT=ON \
+	"${PROJECT_ROOT}"
+
+echo "Building..."
+cmake --build "${BUILD_DIR}"
+
+BINARY="${BUILD_DIR}/src/jellyfin-desktop"
+if [[ ! -x "${BINARY}" ]]; then
+	echo "error: build did not produce ${BINARY}" >&2
+	exit 1
+fi
+
+echo ""
+echo "Build complete: ${BINARY}"
+echo ""
+
+BIN_DEST="${PREFIX}/bin/jellyfin-desktop"
+DESKTOP_SRC="${PROJECT_ROOT}/resources/meta/org.jellyfin.JellyfinDesktop.desktop"
+APPDATA_SRC="${PROJECT_ROOT}/resources/meta/org.jellyfin.JellyfinDesktop.appdata.xml"
+ICON_SRC="${PROJECT_ROOT}/resources/images/icon.svg"
+DESKTOP_DEST="${PREFIX}/share/applications/org.jellyfin.JellyfinDesktop.desktop"
+APPDATA_DEST="${PREFIX}/share/metainfo/org.jellyfin.JellyfinDesktop.appdata.xml"
+ICON_DEST="${PREFIX}/share/icons/hicolor/scalable/apps/org.jellyfin.JellyfinDesktop.svg"
+
+if confirm "Install binary to ${BIN_DEST} (requires sudo)?"; then
+	sudo install -Dm755 "${BINARY}" "${BIN_DEST}"
+	echo "Installed ${BIN_DEST}"
+else
+	echo "Skipped binary install."
+fi
+
+if confirm "Copy .desktop file, icon, and appdata metadata for app menu integration (requires sudo)?"; then
+	sudo install -Dm644 "${DESKTOP_SRC}" "${DESKTOP_DEST}"
+	sudo install -Dm644 "${APPDATA_SRC}" "${APPDATA_DEST}"
+	sudo install -Dm644 "${ICON_SRC}" "${ICON_DEST}"
+	echo "Installed desktop entry, icon, and appdata metadata."
+else
+	echo "Skipped desktop integration files."
+fi
+
+echo ""
+echo "Done."

dev/linux/setup.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+# Jellyfin Desktop - Linux dependency installer
+# Run once (Debian/Ubuntu) before build.sh.
+#
+# Installs everything listed under Build-Depends in ../../debian/control,
+# then installs the runtime QML plugins the app imports (Qt.labs.platform,
+# WebEngine, etc.).
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${0}")" && pwd)"
+PROJECT_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
+
+if ! command -v apt-get >/dev/null; then
+	echo "error: apt-get not found. This script targets Debian/Ubuntu." >&2
+	echo "See ${PROJECT_ROOT}/debian/control for the full dependency list." >&2
+	exit 1
+fi
+
+echo "Installing build tooling (devscripts, equivs, ninja-build)..."
+sudo apt-get update
+sudo apt-get install --yes devscripts equivs ninja-build
+
+echo "Installing build dependencies from debian/control..."
+sudo mk-build-deps -i -r -t "apt-get --yes" "${PROJECT_ROOT}/debian/control"
+
+echo "Installing runtime QML modules..."
+sudo apt-get install --yes \
+	qml6-module-qtwebengine \
+	qml6-module-qtwebchannel \
+	qml6-module-qtquick-controls \
+	qml6-module-qtquick-window \
+	qml6-module-qtqml-workerscript \
+	qml6-module-qtquick-templates \
+	qml6-module-qt-labs-platform
+
+echo ""
+echo "Setup complete. Run build.sh to build."