python-launcher

#!/bin/bash
set -euo pipefail

APP_DIR="$(cd "$(dirname "$0")" && pwd)"
CACHE="$APP_DIR/.python-path"
PYTHON=""

if [[ -r "$CACHE" ]]; then
    IFS= read -r candidate < "$CACHE" || true
    if [[ -x "$candidate" ]] &&
       "$candidate" -c 'import tkinter' >/dev/null 2>&1; then
        PYTHON="$candidate"
    fi
fi

if [[ -z "$PYTHON" ]]; then
    for candidate in /opt/local/bin/python3.15 /opt/local/bin/python3.14 /opt/local/bin/python3.13 /opt/local/bin/python3.12 /opt/local/bin/python3.11 /usr/local/bin/python3 /opt/homebrew/bin/python3 /opt/local/bin/python /usr/bin/python3; do
        if [[ -x "$candidate" ]] &&
           "$candidate" -c 'import tkinter' >/dev/null 2>&1; then
            PYTHON="$candidate"
            printf '%s\n' "$PYTHON" > "$CACHE"
            break
        fi
    done
fi

if [[ -z "$PYTHON" ]]; then
    echo "No Python installation with tkinter was found." >&2
    exit 1
fi

exec "$PYTHON" "$@"