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// Copyright (c) 2013 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 "tools/gn/target.h"
#include <set>
#include "base/bind.h"
#include "tools/gn/scheduler.h"
namespace {
typedef std::set<const Config*> ConfigSet;
void TargetResolvedThunk(const base::Callback<void(const Target*)>& cb,
const Target* t) {
cb.Run(t);
}
// Merges the dependent configs from the given target to the given config list.
// The unique_configs list is used for de-duping so values already added will
// not be added again.
void MergeDirectDependentConfigsFrom(const Target* from_target,
ConfigSet* unique_configs,
std::vector<const Config*>* dest) {
const std::vector<const Config*>& direct =
from_target->direct_dependent_configs();
for (size_t i = 0; i < direct.size(); i++) {
if (unique_configs->find(direct[i]) == unique_configs->end()) {
unique_configs->insert(direct[i]);
dest->push_back(direct[i]);
}
}
}
// Like MergeDirectDependentConfigsFrom above except does the "all dependent"
// ones. This additionally adds all configs to the all_dependent_configs_ of
// the dest target given in *all_dest.
void MergeAllDependentConfigsFrom(const Target* from_target,
ConfigSet* unique_configs,
std::vector<const Config*>* dest,
std::vector<const Config*>* all_dest) {
const std::vector<const Config*>& all =
from_target->all_dependent_configs();
for (size_t i = 0; i < all.size(); i++) {
// Always add it to all_dependent_configs_ since it might not be in that
// list even if we've seen it applied to this target before. This may
// introduce some duplicates in all_dependent_configs_, but those will
// we removed when they're actually applied to a target.
all_dest->push_back(all[i]);
if (unique_configs->find(all[i]) == unique_configs->end()) {
// One we haven't seen yet, also apply it to ourselves.
dest->push_back(all[i]);
unique_configs->insert(all[i]);
}
}
}
} // namespace
Target::Target(const Settings* settings, const Label& label)
: Item(label),
settings_(settings),
output_type_(UNKNOWN),
generated_(false),
generator_function_(NULL) {
}
Target::~Target() {
}
// static
const char* Target::GetStringForOutputType(OutputType type) {
switch (type) {
case UNKNOWN:
return "Unknown";
case GROUP:
return "Group";
case EXECUTABLE:
return "Executable";
case SHARED_LIBRARY:
return "Shared library";
case STATIC_LIBRARY:
return "Static library";
case COPY_FILES:
return "Copy";
case CUSTOM:
return "Custom";
default:
return "";
}
}
Target* Target::AsTarget() {
return this;
}
const Target* Target::AsTarget() const {
return this;
}
void Target::OnResolved() {
// Only add each config once. First remember the target's configs.
std::set<const Config*> unique_configs;
for (size_t i = 0; i < configs_.size(); i++)
unique_configs.insert(configs_[i]);
// Copy our own dependent configs to the list of configs applying to us.
for (size_t i = 0; i < all_dependent_configs_.size(); i++) {
const Config* cur = all_dependent_configs_[i];
if (unique_configs.find(cur) == unique_configs.end()) {
unique_configs.insert(cur);
configs_.push_back(cur);
}
}
for (size_t i = 0; i < direct_dependent_configs_.size(); i++) {
const Config* cur = direct_dependent_configs_[i];
if (unique_configs.find(cur) == unique_configs.end()) {
unique_configs.insert(cur);
configs_.push_back(cur);
}
}
// Gather info from our dependents we need.
for (size_t dep = 0; dep < deps_.size(); dep++) {
MergeAllDependentConfigsFrom(deps_[dep], &unique_configs, &configs_,
&all_dependent_configs_);
MergeDirectDependentConfigsFrom(deps_[dep], &unique_configs, &configs_);
// Direct dependent libraries.
if (deps_[dep]->output_type() == STATIC_LIBRARY ||
deps_[dep]->output_type() == SHARED_LIBRARY)
inherited_libraries_.insert(deps_[dep]);
// Inherited libraries. Don't pull transitive libraries from shared
// libraries, since obviously those shouldn't be linked directly into
// later deps unless explicitly specified.
if (deps_[dep]->output_type() != SHARED_LIBRARY &&
deps_[dep]->output_type() != EXECUTABLE) {
const std::set<const Target*> inherited =
deps_[dep]->inherited_libraries();
for (std::set<const Target*>::const_iterator i = inherited.begin();
i != inherited.end(); ++i)
inherited_libraries_.insert(*i);
}
}
// Forward direct dependent configs if requested.
for (size_t dep = 0; dep < forward_dependent_configs_.size(); dep++) {
const Target* from_target = forward_dependent_configs_[dep];
// The forward_dependent_configs_ must be in the deps already, so we
// don't need to bother copying to our configs, only forwarding.
DCHECK(std::find(deps_.begin(), deps_.end(), from_target) !=
deps_.end());
const std::vector<const Config*>& direct =
from_target->direct_dependent_configs();
for (size_t i = 0; i < direct.size(); i++)
direct_dependent_configs_.push_back(direct[i]);
}
// Mark as resolved.
if (!settings_->build_settings()->target_resolved_callback().is_null()) {
g_scheduler->ScheduleWork(base::Bind(&TargetResolvedThunk,
settings_->build_settings()->target_resolved_callback(),
this));
}
}
bool Target::HasBeenGenerated() const {
return generated_;
}
void Target::SetGenerated(const Token* token) {
DCHECK(!generated_);
generated_ = true;
generator_function_ = token;
}
bool Target::IsLinkable() const {
return output_type_ == STATIC_LIBRARY || output_type_ == SHARED_LIBRARY;
}
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