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# Copyright 2023 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Generates a C++ header file that contains a list of values under a specific variant
# or enum. The list can be used for ensuring that values in C++ are in sync with the
# histogram file. The header file provides a function to check if a value in is the list.
#
# Parameters:
# input_xml_file: Input file that contains the allow list. This should be a
# .xml file under path //tools/metrics/histograms/ or its subfolders.
#
# namespace:
# C++ namespace in which the generated code should be scoped.
#
# tag:
# XML tag that contains the values. Should be either "variant" or "enum".
#
# allow_list_name:
# Name of the variant or enum list in the histogram file.
#
# output_file:
# Name of the generated file to be used for checking if a value exists in the list.
#
template("generate_allowlist_from_histograms_file") {
action(target_name) {
output_file = "$target_gen_dir/" + invoker.output_file
script =
"//tools/metrics/histograms/generate_allowlist_from_histograms_file.py"
outputs = [ output_file ]
sources = [ invoker.input_xml_file ]
args = [
"--allow_list_name=" + invoker.allow_list_name,
"--namespace=" + invoker.namespace,
"--tag=" + invoker.tag,
"--output_dir=" + rebase_path(root_gen_dir, root_build_dir),
"--file=" + rebase_path(output_file, root_gen_dir),
"--input=" + rebase_path(invoker.input_xml_file, root_build_dir),
]
}
}
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