stack

#!/usr/bin/env bash
# stack CLI — all logic lives in lib/stack/
#
# Apple's Command Line Tools ship `python3` as 3.9, which is too old for
# stack and often takes priority over Homebrew on PATH. Prefer the
# version-named binaries that Homebrew installs and only fall back to
# `python3` if it's actually new enough.

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"

PYTHON=
for cand in python3.13 python3.12 python3.11 python3; do
    if command -v "$cand" >/dev/null 2>&1; then
        ver=$("$cand" -c 'import sys; print(sys.version_info[0]*100 + sys.version_info[1])' 2>/dev/null || echo 0)
        if [ "$ver" -ge 311 ]; then
            PYTHON="$cand"
            break
        fi
    fi
done

if [ -z "$PYTHON" ]; then
    if [ -t 2 ]; then
        RED=$'\033[38;5;203m'
        ORANGE=$'\033[38;5;208m'
        BOLD=$'\033[1m'
        RESET=$'\033[0m'
    else
        RED= ORANGE= BOLD= RESET=
    fi
    cat >&2 <<EOF

  ${RED}✗${RESET}  stack requires Python 3.11 or newer.

  Apple's Command Line Tools ship Python 3.9, which is too old.
  Install a newer Python via Homebrew:

      brew install python

  Then open a ${ORANGE}new terminal tab${RESET} (${BOLD}⌘T${RESET}) and re-run ./stack.

EOF
    exit 1
fi

exec env PYTHONPATH="$SCRIPT_DIR/lib" "$PYTHON" -m stack "$@"