blob: 45e11d4696378539d79ebddec2358b22f06b3a9f [file] [log] [blame]
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stddef.h>
#include "gn/build_settings.h"
#include "gn/err.h"
#include "gn/functions.h"
#include "gn/label_pattern.h"
#include "gn/parse_tree.h"
#include "gn/scope.h"
#include "gn/settings.h"
#include "gn/value.h"
namespace functions {
const char kLabelMatches[] = "label_matches";
const char kLabelMatches_HelpShort[] =
"label_matches: Returns whether a label matches any of a list of patterns.";
const char kLabelMatches_Help[] =
R"(label_matches: Returns true if the label matches any of a set of patterns.
label_matches(target_label, patterns)
The argument patterns must be a list of label patterns (see
"gn help label_pattern"). If the target_label matches any of the patterns,
the function returns the value true.
result = label_matches("//baz:bar", [ "//foo/bar/*", "//baz:*" ])
# result will be true
Value RunLabelMatches(Scope* scope,
const FunctionCallNode* function,
const std::vector<Value>& args,
Err* err) {
if (args.size() != 2) {
*err = Err(function, "Expecting exactly two arguments.");
return Value();
// Extract "label"
if (args[0].type() != Value::STRING) {
*err = Err(args[0], "First argument must be a target label.");
return Value();
Label label =
ToolchainLabelForScope(scope), args[0], err);
if (label.is_null()) {
return Value();
// Extract "patterns".
if (args[1].type() != Value::LIST) {
*err = Err(args[1], "Second argument must be a list of label patterns.");
return Value();
std::vector<LabelPattern> patterns;
for (const auto& pattern_string : args[1].list_value()) {
if (pattern_string.type() != Value::STRING) {
*err = Err(pattern_string,
"Second argument must be a list of label patterns.");
return Value();
LabelPattern pattern = LabelPattern::GetPattern(
scope->settings()->build_settings()->root_path_utf8(), pattern_string,
if (err->has_error()) {
return Value();
return Value(function, LabelPattern::VectorMatches(patterns, label));
} // namespace functions