#!/bin/bash

RBENV_VERSION="$1"
if [ -z "$RBENV_VERSION" ]; then
  echo "usage: rbenv set-default VERSION" >&2
  exit 1
fi

RBENV_VERSION_PATH="${HOME}/.rbenv/versions/${RBENV_VERSION}"
if [ ! -d "$RBENV_VERSION_PATH" ]; then
  echo "rbenv: version \`${RBENV_VERSION}' not installed" >&2
  exit 1
fi

echo "$RBENV_VERSION" > "${HOME}/.rbenv/default"