start-macos.command

#!/bin/bash
# IMAP Synchronizer launcher for macOS. Installs Homebrew + Python 3 if missing.
cd "$(dirname "$0")" || exit 1

# Make Homebrew visible if it is installed but not on PATH (fresh terminals).
# Checked by path because "eval" of an empty substitution reports success,
# which would skip the Intel location on Intel Macs.
[ -x /opt/homebrew/bin/brew ] && eval "$(/opt/homebrew/bin/brew shellenv)"
[ -x /usr/local/bin/brew ] && eval "$(/usr/local/bin/brew shellenv)"

have_working_python3() {
    command -v python3 >/dev/null 2>&1 || return 1
    # On a clean macOS, /usr/bin/python3 is only a stub that pops up the
    # "install Command Line Tools" dialog. Treat it as missing unless the
    # developer tools are actually installed.
    if [ "$(command -v python3)" = "/usr/bin/python3" ] && \
       ! xcode-select -p >/dev/null 2>&1; then
        return 1
    fi
    return 0
}

if ! have_working_python3; then
    echo "A working Python 3 was not found on this Mac."
    if ! command -v brew >/dev/null 2>&1; then
        echo "Installing Homebrew (you may be asked for your macOS password)..."
        /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
        # Make brew available in this shell (Apple Silicon and Intel paths)
        [ -x /opt/homebrew/bin/brew ] && eval "$(/opt/homebrew/bin/brew shellenv)"
        [ -x /usr/local/bin/brew ] && eval "$(/usr/local/bin/brew shellenv)"
    fi
    if ! command -v brew >/dev/null 2>&1; then
        echo "Homebrew installation failed. Install Python 3 manually from"
        echo "https://www.python.org/downloads/ and run this launcher again."
        read -r -p "Press Enter to close..."
        exit 1
    fi
    echo "Installing Python 3 with Homebrew..."
    brew install python
fi

python3 imapsynchronizer.py
read -r -p "Press Enter to close..."