#!/bin/sh
# Download the xo-space installer, then run it. Everything the install
# actually does lives in that script, not in this one.
set -eu

# Serves the installer from one branch and tells the installer to clone the
# same one, so QUIRQ_SOURCE_REF=development moves the whole install together.
REF="${QUIRQ_SOURCE_REF:-main}"
INSTALL_URL="https://raw.githubusercontent.com/quirq-ai/xo-space/${REF}/install.sh"

fail() {
  printf '\nquirq: %s\n' "$*" >&2
  exit 1
}

require_command() {
  command -v "$1" >/dev/null 2>&1 || fail "$2"
}

cat <<'QUIRQ_BANNER'
             _
  __ _ _   _(_)_ __ __ _
 / _` | | | | | '__/ _` |
| (_| | |_| | | | | (_| |
 \__, |\__,_|_|_|  \__, |
    |_|               |_|
QUIRQ_BANNER

require_command curl "curl is required to download the Quirq installer."
require_command bash "Bash is required to run the Quirq installer."

# Written to a file rather than piped straight into bash. A transfer that
# drops halfway would otherwise hand bash a truncated script and it would
# run what arrived, and this leaves the terminal on the installer's stdin.
TMP="$(mktemp "${TMPDIR:-/tmp}/quirq-install.XXXXXX")" ||
  fail "Could not create a temporary file."
trap 'rm -f "$TMP"' EXIT INT TERM

printf '\nFetching the Quirq installer (%s)...\n' "$REF"
curl -fsSL "$INSTALL_URL" -o "$TMP" ||
  fail "Could not download $INSTALL_URL"
[ -s "$TMP" ] || fail "The downloaded installer is empty."

# The installer reads this too, so the branch that served it is the branch
# it goes on to clone.
export QUIRQ_SOURCE_REF="$REF"

# Not exec: the trap above still has a temporary file to remove afterwards.
bash "$TMP"