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//===--- JSONCompilationDatabase.h - ----------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// The JSONCompilationDatabase finds compilation databases supplied as a file
// 'compile_commands.json'.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLING_JSON_COMPILATION_DATABASE_H
#define LLVM_CLANG_TOOLING_JSON_COMPILATION_DATABASE_H
#include "clang/Basic/LLVM.h"
#include "clang/Tooling/CompilationDatabase.h"
#include "clang/Tooling/FileMatchTrie.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/YAMLParser.h"
#include <string>
#include <vector>
namespace clang {
namespace tooling {
/// \brief A JSON based compilation database.
///
/// JSON compilation database files must contain a list of JSON objects which
/// provide the command lines in the attributes 'directory', 'command' and
/// 'file':
/// [
/// { "directory": "<working directory of the compile>",
/// "command": "<compile command line>",
/// "file": "<path to source file>"
/// },
/// ...
/// ]
/// Each object entry defines one compile action. The specified file is
/// considered to be the main source file for the translation unit.
///
/// JSON compilation databases can for example be generated in CMake projects
/// by setting the flag -DCMAKE_EXPORT_COMPILE_COMMANDS.
class JSONCompilationDatabase : public CompilationDatabase {
public:
/// \brief Loads a JSON compilation database from the specified file.
///
/// Returns NULL and sets ErrorMessage if the database could not be
/// loaded from the given file.
static JSONCompilationDatabase *loadFromFile(StringRef FilePath,
std::string &ErrorMessage);
/// \brief Loads a JSON compilation database from a data buffer.
///
/// Returns NULL and sets ErrorMessage if the database could not be loaded.
static JSONCompilationDatabase *loadFromBuffer(StringRef DatabaseString,
std::string &ErrorMessage);
/// \brief Returns all compile comamnds in which the specified file was
/// compiled.
///
/// FIXME: Currently FilePath must be an absolute path inside the
/// source directory which does not have symlinks resolved.
virtual std::vector<CompileCommand> getCompileCommands(
StringRef FilePath) const;
/// \brief Returns the list of all files available in the compilation database.
///
/// These are the 'file' entries of the JSON objects.
virtual std::vector<std::string> getAllFiles() const;
/// \brief Returns all compile commands for all the files in the compilation
/// database.
virtual std::vector<CompileCommand> getAllCompileCommands() const;
private:
/// \brief Constructs a JSON compilation database on a memory buffer.
JSONCompilationDatabase(llvm::MemoryBuffer *Database)
: Database(Database), YAMLStream(Database->getBuffer(), SM) {}
/// \brief Parses the database file and creates the index.
///
/// Returns whether parsing succeeded. Sets ErrorMessage if parsing
/// failed.
bool parse(std::string &ErrorMessage);
// Tuple (directory, commandline) where 'commandline' pointing to the
// corresponding nodes in the YAML stream.
typedef std::pair<llvm::yaml::ScalarNode*,
llvm::yaml::ScalarNode*> CompileCommandRef;
/// \brief Converts the given array of CompileCommandRefs to CompileCommands.
void getCommands(ArrayRef<CompileCommandRef> CommandsRef,
std::vector<CompileCommand> &Commands) const;
// Maps file paths to the compile command lines for that file.
llvm::StringMap< std::vector<CompileCommandRef> > IndexByFile;
FileMatchTrie MatchTrie;
OwningPtr<llvm::MemoryBuffer> Database;
llvm::SourceMgr SM;
llvm::yaml::Stream YAMLStream;
};
} // end namespace tooling
} // end namespace clang
#endif // LLVM_CLANG_TOOLING_JSON_COMPILATION_DATABASE_H
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