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// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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
//
// http://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.
#ifndef NINJA_DYNDEP_LOADER_H_
#define NINJA_DYNDEP_LOADER_H_
#include <map>
#include <string>
#include <vector>
struct DiskInterface;
struct Edge;
struct Node;
struct State;
/// Store dynamically-discovered dependency information for one edge.
struct Dyndeps {
Dyndeps() : used_(false), restat_(false) {}
bool used_;
bool restat_;
std::vector<Node*> implicit_inputs_;
std::vector<Node*> implicit_outputs_;
};
/// Store data loaded from one dyndep file. Map from an edge
/// to its dynamically-discovered dependency information.
/// This is a struct rather than a typedef so that we can
/// forward-declare it in other headers.
struct DyndepFile: public std::map<Edge*, Dyndeps> {};
/// DyndepLoader loads dynamically discovered dependencies, as
/// referenced via the "dyndep" attribute in build files.
struct DyndepLoader {
DyndepLoader(State* state, DiskInterface* disk_interface)
: state_(state), disk_interface_(disk_interface) {}
/// Load a dyndep file from the given node's path and update the
/// build graph with the new information. One overload accepts
/// a caller-owned 'DyndepFile' object in which to store the
/// information loaded from the dyndep file.
bool LoadDyndeps(Node* node, std::string* err) const;
bool LoadDyndeps(Node* node, DyndepFile* ddf, std::string* err) const;
private:
bool LoadDyndepFile(Node* file, DyndepFile* ddf, std::string* err) const;
bool UpdateEdge(Edge* edge, Dyndeps const* dyndeps, std::string* err) const;
State* state_;
DiskInterface* disk_interface_;
};
#endif // NINJA_DYNDEP_LOADER_H_
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