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49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "tools/gn/config.h"
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#include "tools/gn/err.h"
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#include "tools/gn/input_file_manager.h"
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#include "tools/gn/scheduler.h"
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Config::Config(const Settings* settings, const Label& label)
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: Item(settings, label), resolved_(false) {}
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Config::~Config() = default;
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Config* Config::AsConfig() {
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return this;
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}
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const Config* Config::AsConfig() const {
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return this;
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}
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bool Config::OnResolved(Err* err) {
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DCHECK(!resolved_);
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resolved_ = true;
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if (!configs_.empty()) {
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// Subconfigs, flatten.
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//
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// Implementation note for the future: Flattening these here means we
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// lose the ability to de-dupe subconfigs. If a subconfig is listed as
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// a separate config or a subconfig that also applies to the target, the
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// subconfig's flags will be duplicated.
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//
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// If we want to be able to de-dupe these, here's one idea. As a config is
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// resolved, inline any sub-sub configs so the configs_ vector is a flat
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// list, much the same way that libs and lib_dirs are pushed through
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// targets. Do the same for Target.configs_ when a target is resolved. This
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// will naturally de-dupe and also prevents recursive config walking to
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// compute every possible flag, although it will expand the configs list on
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// a target nontrivially (depending on build configuration).
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composite_values_ = own_values_;
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for (const auto& pair : configs_)
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composite_values_.AppendValues(pair.ptr->resolved_values());
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}
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return true;
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}
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