build/toolchain/buildidtool.gni

# Copyright 2024 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.

declare_args() {
  # Use the prebuilt buildidtool binary rather than one built locally.
  # **NOTE:** Setting this to `false` uses the `toolchain_deps` mechanism in
  # GN, which can slow down Ninja significantly.  Also, to circular deps the
  # $host_toolchain has no `toolchain_deps` and so doesn't ensure the
  # buildidtool is built before it's needed.  This may make builds unreliable,
  # but it should be possible to iterate on incremental builds and get the new
  # tool in place eventually.  This should only be used during active
  # development of buildidtool itself.
  #
  # Note, this never applies to Go builds because of the circularity of using
  # buildidtool in the build of buildidtool.
  use_prebuilt_buildidtool = true
}

_prebuilt_buildidtool =
    "//prebuilt/tools/buildidtool/${host_platform}/buildidtool"

_buildidtool_label = "//tools/debug/buildidtool($host_toolchain)"
_buildidtool_out_dir = get_label_info(_buildidtool_label, "root_out_dir")
_local_buildidtool = "$_buildidtool_out_dir/buildidtool"

if (use_prebuilt_buildidtool) {
  buildidtool_path = _prebuilt_buildidtool
  buildidtool_toolchain_deps = []
} else {
  buildidtool_path = _local_buildidtool
  buildidtool_toolchain_deps = [ _buildidtool_label ]
}

buildidtool_invocation_path = rebase_path(buildidtool_path, root_build_dir)