#!/usr/bin/env sh
# scripts/setup.sh — nothing → a running tau on this machine.
#   curl -fsSL https://ficus.sh/cli/setup.sh | bash
#   curl -fsSL https://ficus.sh/cli/setup.sh | bash -s -- --runtime host --yes
# Installs the tau CLI (if missing), then hands off to `tau server install`,
# which clones the source into ~/.tau/tau and runs the checkout's own setup.
set -eu

INSTALLER_URL="${TAU_INSTALL_URL:-https://ficus.sh/cli/install.sh}"
TAU_BIN="${TAU_INSTALL_DIR:-$HOME/.tau/bin}/tau"

err() { printf '\n✗ error: %s\n' "$*" >&2; exit 1; }
need() { command -v "$1" >/dev/null 2>&1 || err "required command not found: $1"; }

need curl
need git

if [ -x "$TAU_BIN" ] && [ "${TAU_SETUP_SKIP_CLI_INSTALL:-0}" = "1" ]; then
  printf '==> Using existing tau CLI at %s\n' "$TAU_BIN" >&2
else
  printf '==> Installing the tau CLI\n' >&2
  TAU_INSTALL_AUTH=0 sh -c "curl -fsSL \"$INSTALLER_URL\" | sh" || err "CLI install failed"
  [ -x "$TAU_BIN" ] || err "CLI installer did not produce $TAU_BIN"
fi

printf '==> tau server install %s\n' "$*" >&2
# Under `curl | bash` stdin is the script itself; give the installer the terminal
# back when one is actually attachable (not just present as a device node —
# opening it fails with ENXIO when the process has no controlling terminal at
# all, e.g. under CI or a test harness).
if (exec 0< /dev/tty) 2>/dev/null; then
  exec "$TAU_BIN" server install "$@" < /dev/tty
else
  exec "$TAU_BIN" server install "$@"
fi