pw_build/input_group.gni


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36

# Copyright 2019 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.

import("python_action.gni")

# Creates an action that doesn't do anything that depends on a list of input
# files. This allows modifications to these files to trigger targets depending
# on this group to rebuild.
#
# This is typically used for targets that don't output any artifacts (e.g.
# metadata-only targets) which list input files relevant to the build.
template("pw_input_group") {
  assert(defined(invoker.inputs), "pw_input_group requires some inputs")

  pw_python_action(target_name) {
    ignore_vars = [
      "args",
      "script",
      "stamp",
    ]
    forward_variables_from(invoker, "*", ignore_vars)
    script = "$dir_pw_build/py/pw_build/nop.py"
    stamp = true
  }
}