start-linux.sh

#!/bin/bash
# IMAP Synchronizer launcher for Linux. Installs Python 3 via the distro package manager if missing.
cd "$(dirname "$0")" || exit 1

# Package installs need root: use sudo when available, nothing when already
# root (containers/minimal systems often have no sudo at all).
if [ "$(id -u)" -eq 0 ]; then
    SUDO=""
elif command -v sudo >/dev/null 2>&1; then
    SUDO="sudo"
else
    SUDO="__none__"
fi

if ! command -v python3 >/dev/null 2>&1; then
    if [ "$SUDO" = "__none__" ]; then
        echo "Python 3 was not found and neither root nor sudo is available."
        echo "Please install Python 3 manually and run this launcher again."
        exit 1
    fi
    echo "Python 3 was not found on this system. Trying to install it..."
    if command -v apt-get >/dev/null 2>&1; then
        $SUDO apt-get update && $SUDO apt-get install -y python3 python3-pip
    elif command -v dnf >/dev/null 2>&1; then
        $SUDO dnf install -y python3 python3-pip
    elif command -v pacman >/dev/null 2>&1; then
        $SUDO pacman -Sy --noconfirm python python-pip
    elif command -v zypper >/dev/null 2>&1; then
        $SUDO zypper install -y python3 python3-pip
    else
        echo "Could not detect your package manager. Please install Python 3"
        echo "manually and run this launcher again."
        exit 1
    fi
fi

# The tool's only dependency ('rich') installs itself via pip on first run,
# but on Debian/Ubuntu the distro package avoids PEP 668 restrictions.
if ! python3 -c "import rich" >/dev/null 2>&1 && [ "$SUDO" != "__none__" ]; then
    if command -v apt-get >/dev/null 2>&1; then
        $SUDO apt-get install -y python3-rich 2>/dev/null || true
    elif command -v dnf >/dev/null 2>&1; then
        $SUDO dnf install -y python3-rich 2>/dev/null || true
    elif command -v pacman >/dev/null 2>&1; then
        $SUDO pacman -S --noconfirm python-rich 2>/dev/null || true
    fi
fi

python3 imapsynchronizer.py