# Copyright 2024 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Defines the configuration of Remote Build Execution (RBE).

declare_args() {
  # The directory where the re-client tooling binaries are.
  rbe_bin_dir = rebase_path("//buildtools/reclient", root_build_dir)

  # Execution root - this should be the root of the source tree.
  # This is defined here instead of in the config file because
  # this will vary depending on where the user has placed the
  # chromium source on their system.
  rbe_exec_root = rebase_path("//")

  # Set to true to enable remote compilation using reclient.
  use_remoteexec = false

  # Set to true to enable remote linking using reclient.
  use_remoteexec_links = false

  # The directory where the re-client configuration files are.
  rbe_cfg_dir = "//buildtools/reclient_cfgs"
}

declare_args() {
  # Set to the path of the RBE reclient configuration files.
  # Configuration file selection based on operating system.
  if (host_os == "linux") {
    rbe_py_cfg_file =
        rebase_path(rbe_cfg_dir, root_build_dir) + "/python/rewrapper_linux.cfg"
    rbe_py_large_cfg_file = rebase_path(rbe_cfg_dir, root_build_dir) +
                            "/python/rewrapper_linux_large.cfg"
    rbe_cc_cfg_file = rebase_path(rbe_cfg_dir, root_build_dir) +
                      "/chromium-browser-clang/rewrapper_linux.cfg"
    rbe_link_cfg_file = rebase_path(rbe_cfg_dir, root_build_dir) +
                        "/chromium-browser-clang/rewrapper_linux_link.cfg"
  } else if (host_os == "win") {
    rbe_py_cfg_file = rebase_path(rbe_cfg_dir, root_build_dir) +
                      "/python/rewrapper_windows.cfg"
    rbe_py_large_cfg_file = rebase_path(rbe_cfg_dir, root_build_dir) +
                            "/python/rewrapper_windows_large.cfg"
    rbe_cc_cfg_file = rebase_path(rbe_cfg_dir, root_build_dir) +
                      "/chromium-browser-clang/rewrapper_windows.cfg"
    rbe_link_cfg_file = ""
  } else if (host_os == "mac") {
    rbe_py_cfg_file =
        rebase_path(rbe_cfg_dir, root_build_dir) + "/python/rewrapper_mac.cfg"
    rbe_py_large_cfg_file = rebase_path(rbe_cfg_dir, root_build_dir) +
                            "/python/rewrapper_mac_large.cfg"
    rbe_cc_cfg_file = rebase_path(rbe_cfg_dir, root_build_dir) +
                      "/chromium-browser-clang/rewrapper_mac.cfg"
    rbe_link_cfg_file = ""
  } else {
    rbe_linkcfg_file = ""
    rbe_py_cfg_file = ""
    rbe_cc_cfg_file = ""
  }

  # Set to the path of the RBE recleint wrapper for ChromeOS.
  rbe_cros_cc_wrapper = "${rbe_bin_dir}/rewrapper"
}

if (use_remoteexec && current_toolchain == default_toolchain) {
  # Check existence of reclient configs and show user friendly error message if
  # it doesn't.
  exec_script(rebase_path("//build/toolchain/check_rewrapper_cfg.py"),
              [ rbe_cc_cfg_file ],
              "",
              [ rebase_path(rbe_cc_cfg_file, ".", root_build_dir) ])
}

if (is_win) {
  if (use_remoteexec_links) {
    print("For now, remote linking is not available for Windows.")
    use_remoteexec_links = false
  }
}
if (is_mac || is_ios) {
  if (use_remoteexec_links) {
    print("For now, remote linking is not available on Macs.")
    use_remoteexec_links = false
  }
}

# TODO(crbug.com/326584510): Reclient does not upload `inputs` from C/C++
# targets. This file is added to `inputs` for all C targets in
# //build/config/BUILDCONFIG.gn. We work around the bug in Reclient by
# specifying the file here.
#
# This is a comma-delimited list of paths relative to the source tree root. The
# leading space is important, if the string is non-empty. :)
rbe_bug_326584510_missing_inputs = ""
if (defined(clang_unsafe_buffers_paths) &&
    "$clang_unsafe_buffers_paths" != "") {
  from_exec_root = rebase_path(clang_unsafe_buffers_paths, rbe_exec_root)
  rbe_bug_326584510_missing_inputs = " -inputs=$from_exec_root"
}