#!/bin/bash
# Copyright 2017 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.

### build Fuchsia

## usage: fx build [ninja option,...] [target,...]

source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"/lib/vars.sh
fx-config-read

function main {
  # macOS needs a lower value of -j parameter, because it has a limit on the
  # number of open file descriptors. Use 4 * cpu_count, which works well in
  # practice.
  local concurrency_args=
  if grep -q "use_goma = true" "${FUCHSIA_BUILD_DIR}/args.gn"; then
    if [[ "$(uname -s)" = "Darwin" ]]; then
      numjobs=$(( $(sysctl -n hw.ncpu) * 4 ))
      concurrency_args="-j ${numjobs}"
    else
      concurrency_args="-j 1000"
    fi
  fi

  local env_args=

  # PATH is required to find a number of tools on the host system.
  if [[ -n "${PATH}" ]]; then
    env_args="${env_args} PATH=${PATH}"
  fi

  # TERM is required by ninja to print status messages on the same line.
  if [[ -n "${TERM}" ]]; then
    env_args="${env_args} TERM=${TERM}"
  fi

  # TMPDIR is required by goma on Mac OS X.
  if [[ -n "${TMPDIR}" ]]; then
    env_args="${env_args} TMPDIR=${TMPDIR}"
  fi

  env -i ${env_args} \
    "${FUCHSIA_DIR}/buildtools/ninja" ${concurrency_args} -C "${FUCHSIA_BUILD_DIR}" "$@"
}

main "$@"