1 //===--- JSONCompilationDatabase.h - ----------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // The JSONCompilationDatabase finds compilation databases supplied as a file 11 // 'compile_commands.json'. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_CLANG_TOOLING_JSON_COMPILATION_DATABASE_H 16 #define LLVM_CLANG_TOOLING_JSON_COMPILATION_DATABASE_H 17 18 #include "clang/Basic/LLVM.h" 19 #include "clang/Tooling/CompilationDatabase.h" 20 #include "clang/Tooling/FileMatchTrie.h" 21 #include "llvm/ADT/StringMap.h" 22 #include "llvm/ADT/StringRef.h" 23 #include "llvm/Support/MemoryBuffer.h" 24 #include "llvm/Support/SourceMgr.h" 25 #include "llvm/Support/YAMLParser.h" 26 #include <memory> 27 #include <string> 28 #include <vector> 29 30 namespace clang { 31 namespace tooling { 32 33 /// \brief A JSON based compilation database. 34 /// 35 /// JSON compilation database files must contain a list of JSON objects which 36 /// provide the command lines in the attributes 'directory', 'command' and 37 /// 'file': 38 /// [ 39 /// { "directory": "<working directory of the compile>", 40 /// "command": "<compile command line>", 41 /// "file": "<path to source file>" 42 /// }, 43 /// ... 44 /// ] 45 /// Each object entry defines one compile action. The specified file is 46 /// considered to be the main source file for the translation unit. 47 /// 48 /// JSON compilation databases can for example be generated in CMake projects 49 /// by setting the flag -DCMAKE_EXPORT_COMPILE_COMMANDS. 50 class JSONCompilationDatabase : public CompilationDatabase { 51 public: 52 /// \brief Loads a JSON compilation database from the specified file. 53 /// 54 /// Returns NULL and sets ErrorMessage if the database could not be 55 /// loaded from the given file. 56 static JSONCompilationDatabase *loadFromFile(StringRef FilePath, 57 std::string &ErrorMessage); 58 59 /// \brief Loads a JSON compilation database from a data buffer. 60 /// 61 /// Returns NULL and sets ErrorMessage if the database could not be loaded. 62 static JSONCompilationDatabase *loadFromBuffer(StringRef DatabaseString, 63 std::string &ErrorMessage); 64 65 /// \brief Returns all compile comamnds in which the specified file was 66 /// compiled. 67 /// 68 /// FIXME: Currently FilePath must be an absolute path inside the 69 /// source directory which does not have symlinks resolved. 70 std::vector<CompileCommand> 71 getCompileCommands(StringRef FilePath) const override; 72 73 /// \brief Returns the list of all files available in the compilation database. 74 /// 75 /// These are the 'file' entries of the JSON objects. 76 std::vector<std::string> getAllFiles() const override; 77 78 /// \brief Returns all compile commands for all the files in the compilation 79 /// database. 80 std::vector<CompileCommand> getAllCompileCommands() const override; 81 82 private: 83 /// \brief Constructs a JSON compilation database on a memory buffer. 84 JSONCompilationDatabase(llvm::MemoryBuffer *Database) 85 : Database(Database), YAMLStream(Database->getBuffer(), SM) {} 86 87 /// \brief Parses the database file and creates the index. 88 /// 89 /// Returns whether parsing succeeded. Sets ErrorMessage if parsing 90 /// failed. 91 bool parse(std::string &ErrorMessage); 92 93 // Tuple (directory, commandline) where 'commandline' pointing to the 94 // corresponding nodes in the YAML stream. 95 typedef std::pair<llvm::yaml::ScalarNode*, 96 llvm::yaml::ScalarNode*> CompileCommandRef; 97 98 /// \brief Converts the given array of CompileCommandRefs to CompileCommands. 99 void getCommands(ArrayRef<CompileCommandRef> CommandsRef, 100 std::vector<CompileCommand> &Commands) const; 101 102 // Maps file paths to the compile command lines for that file. 103 llvm::StringMap< std::vector<CompileCommandRef> > IndexByFile; 104 105 FileMatchTrie MatchTrie; 106 107 std::unique_ptr<llvm::MemoryBuffer> Database; 108 llvm::SourceMgr SM; 109 llvm::yaml::Stream YAMLStream; 110 }; 111 112 } // end namespace tooling 113 } // end namespace clang 114 115 #endif // LLVM_CLANG_TOOLING_JSON_COMPILATION_DATABASE_H 116
