pw_toolchain/universal_tools.gni

# Copyright 2020 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.

pw_universal_copy = {
  if (host_os == "win") {
    command = "cp -af {{source}} {{output}}"
  } else {
    # Use a hard link if possible as this is faster. Also, Mac doesn't
    # preserve timestamps properly with cp -af.
    fallback_command = string_join(" ",
                                   [
                                     "rm -rf",
                                     "{{output}}",
                                     "&&",
                                     "cp -af",
                                     "{{source}}",
                                     "{{output}}",
                                   ])
    command = string_join(" ",
                          [
                            "ln -f",
                            "{{source}}",
                            "{{output}}",
                            "2>/dev/null",
                            "||",
                            "($fallback_command)",
                          ])
  }
  description = "cp {{source}} {{output}}"
}

pw_universal_stamp = {
  if (host_os == "win") {
    command = "cmd /c type nul > \"{{output}}\""
  } else {
    command = "touch {{output}}"
  }
  description = "stamp {{output}}"
}