#!/bin/sh

set -ex

die () { echo "$@" ; cleanup ; exit 1; }
cleanup () {
  rm -f "$(nvm_alias_path)/default"
  if [ -n "${SYSTEM_DIR-}" ]; then
    rm -rf "${SYSTEM_DIR}"
  fi
  if [ -n "${ORIG_PATH-}" ]; then
    PATH="${ORIG_PATH}"
  fi
  unset -f nvm_print_npm_version
}

\. ../../nvm.sh

nvm_make_alias default system

ORIG_PATH="${PATH}"
SYSTEM_VERSION="v0.0.0"
SYSTEM_DIR="$(mktemp -d)"
cat > "${SYSTEM_DIR}/node" <<EOF
#!/bin/sh
command printf '%s\n' "${SYSTEM_VERSION}"
EOF
chmod +x "${SYSTEM_DIR}/node"
PATH="${SYSTEM_DIR}:${PATH}"
nvm_print_npm_version() { command printf ' (npm v1.2.3)'; }

EXPECTED_OUTPUT="Now using system version of node: ${SYSTEM_VERSION}$(nvm_print_npm_version)"
set +ex # since stderr is needed
OUTPUT="$(nvm use default 2>&1)"
set -ex
[ "${OUTPUT}" = "${EXPECTED_OUTPUT}" ] || die "Could not use system via alias. Got >${OUTPUT}<, expected >${EXPECTED_OUTPUT}<"

cleanup