1 // Copyright 2015 Google Inc. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef NINJA_DYNDEP_LOADER_H_ 16 #define NINJA_DYNDEP_LOADER_H_ 17 18 #include <map> 19 #include <string> 20 #include <vector> 21 22 struct DiskInterface; 23 struct Edge; 24 struct Node; 25 struct State; 26 27 /// Store dynamically-discovered dependency information for one edge. 28 struct Dyndeps { DyndepsDyndeps29 Dyndeps() : used_(false), restat_(false) {} 30 bool used_; 31 bool restat_; 32 std::vector<Node*> implicit_inputs_; 33 std::vector<Node*> implicit_outputs_; 34 }; 35 36 /// Store data loaded from one dyndep file. Map from an edge 37 /// to its dynamically-discovered dependency information. 38 /// This is a struct rather than a typedef so that we can 39 /// forward-declare it in other headers. 40 struct DyndepFile: public std::map<Edge*, Dyndeps> {}; 41 42 /// DyndepLoader loads dynamically discovered dependencies, as 43 /// referenced via the "dyndep" attribute in build files. 44 struct DyndepLoader { DyndepLoaderDyndepLoader45 DyndepLoader(State* state, DiskInterface* disk_interface) 46 : state_(state), disk_interface_(disk_interface) {} 47 48 /// Load a dyndep file from the given node's path and update the 49 /// build graph with the new information. One overload accepts 50 /// a caller-owned 'DyndepFile' object in which to store the 51 /// information loaded from the dyndep file. 52 bool LoadDyndeps(Node* node, std::string* err) const; 53 bool LoadDyndeps(Node* node, DyndepFile* ddf, std::string* err) const; 54 55 private: 56 bool LoadDyndepFile(Node* file, DyndepFile* ddf, std::string* err) const; 57 58 bool UpdateEdge(Edge* edge, Dyndeps const* dyndeps, std::string* err) const; 59 60 State* state_; 61 DiskInterface* disk_interface_; 62 }; 63 64 #endif // NINJA_DYNDEP_LOADER_H_ 65