#!/bin/bash

# Copyright 2022 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

set -e

# This script is used to fetch the prebuilt that is needed by driver build.

readonly REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/..
readonly BAZELISK_TOOL="${REPO_ROOT}/bazel"

function get_os {
  uname -s | tr '[:upper:]' '[:lower:]'
}

function get_arch {
  local ARCH="$(uname -m)"
  case "${ARCH}" in
    x86_64)
      ARCH=amd64
      ;;
    aarch64)
      ARCH=arm64
      ;;
  esac
  echo "$ARCH"
}

create_bazel_symlink() {
  local BAZELISK_BIN="${REPO_ROOT}/vendor/bazelisk/bazelisk-$(get_os)-$(get_arch)"
  if [[ ! -x "${BAZELISK_BIN}" ]]; then
     >&2 echo "Bazel wrapper not supported in this OS/architecture. Could not find executable: ${BAZELISK_BIN}"
     exit 1
  fi
  ln -f -s "${BAZELISK_BIN}" "${BAZELISK_TOOL}"
}

main() {
  create_bazel_symlink
}

main "$@"