feat: add install script with distro detection

install.sh

@@ -0,0 +1,147 @@
+#!/bin/bash
+set -e
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m'
+
+info()  { echo -e "${GREEN}[*]${NC} $1"; }
+warn()  { echo -e "${YELLOW}[!]${NC} $1"; }
+error() { echo -e "${RED}[x]${NC} $1"; exit 1; }
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+echo "==================================="
+echo "  x3-Backup Install Script"
+echo "==================================="
+echo ""
+
+# ── Detect distro ──
+detect_distro() {
+    if [ -f /etc/os-release ]; then
+        . /etc/os-release
+        echo "$ID"
+    elif command -v pacman &>/dev/null; then
+        echo "arch"
+    elif command -v emerge &>/dev/null; then
+        echo "gentoo"
+    elif command -v zypper &>/dev/null; then
+        echo "opensuse"
+    elif command -v dnf &>/dev/null; then
+        echo "fedora"
+    else
+        echo "unknown"
+    fi
+}
+
+DISTRO=$(detect_distro)
+info "Detected distro: $DISTRO"
+
+# ── Check if running as root ──
+if [ "$EUID" -eq 0 ]; then
+    SUDO=""
+else
+    SUDO="sudo"
+fi
+
+# ── Install dependencies ──
+install_deps() {
+    info "Installing build dependencies..."
+
+    case "$DISTRO" in
+        arch|manjaro)
+            $SUDO pacman -S --needed --noconfirm \
+                base-devel autoconf autoconf-archive automake libtool \
+                gtk3 json-glib rsync pkg-config
+            ;;
+        ubuntu|debian|linuxmint|pop)
+            $SUDO apt update
+            $SUDO apt install -y \
+                build-essential autoconf automake pkg-config \
+                libgtk-3-dev libjson-glib-dev rsync
+            ;;
+        fedora)
+            $SUDO dnf install -y \
+                gcc-c++ autoconf automake pkgconfig \
+                gtk3-devel json-glib-devel rsync
+            ;;
+        opensuse*)
+            $SUDO zypper install -y \
+                gcc-c++ autoconf automake pkg-config \
+                gtk3-devel json-glib-devel rsync
+            ;;
+        gentoo)
+            $SUDO emerge --ask dev-build/autoconf dev-build/automake \
+                dev-util/pkgconfig x11-libs/gtk+:3 \
+                dev-libs/json-glib net-misc/rsync
+            ;;
+        *)
+            warn "Unknown distro. Please install manually:"
+            warn "  autoconf automake pkg-config libgtk-3-dev libjson-glib-dev rsync"
+            echo -n "Press Enter when done, or 'q' to quit: "
+            read -r answer
+            [ "$answer" = "q" ] && exit 1
+            ;;
+    esac
+
+    info "Dependencies installed."
+}
+
+# ── Build ──
+build() {
+    info "Building x3-backup..."
+    cd "$SCRIPT_DIR"
+
+    # Clean previous build
+    if [ -f Makefile ]; then
+        make distclean 2>/dev/null || true
+    fi
+
+    autoreconf -fi
+    ./configure
+    make -j"$(nproc)"
+    info "Build successful."
+}
+
+# ── Install ──
+install_app() {
+    info "Installing x3-backup..."
+    cd "$SCRIPT_DIR"
+    $SUDO make install
+    info "Installed to /usr/local/bin/x3-backup"
+}
+
+# ── Main ──
+case "${1:-all}" in
+    deps)
+        install_deps
+        ;;
+    build)
+        build
+        ;;
+    install)
+        install_app
+        ;;
+    all)
+        install_deps
+        build
+        install_app
+        echo ""
+        info "==================================="
+        info "  x3-Backup installed successfully!"
+        info "==================================="
+        echo ""
+        info "Run: x3-backup"
+        info "Or:  ./src/x3-backup  (local build)"
+        ;;
+    *)
+        echo "Usage: $0 [deps|build|install|all]"
+        echo ""
+        echo "  deps     Install dependencies only"
+        echo "  build    Build only"
+        echo "  install  Install to /usr/local"
+        echo "  all      Do everything (default)"
+        exit 1
+        ;;
+esac