1 //===--- CompilationDatabase.cpp - ----------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains multiple implementations for CompilationDatabases.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Tooling/CompilationDatabase.h"
15 #include "clang/Tooling/Tooling.h"
16 #include "llvm/ADT/SmallString.h"
17 #include "llvm/Support/YAMLParser.h"
18 #include "llvm/Support/Path.h"
19 #include "llvm/Support/system_error.h"
21 #ifdef USE_CUSTOM_COMPILATION_DATABASE
22 #include "CustomCompilationDatabase.h"
30 /// \brief A parser for escaped strings of command line arguments.
32 /// Assumes \-escaping for quoted arguments (see the documentation of
33 /// unescapeCommandLine(...)).
34 class CommandLineArgumentParser {
36 CommandLineArgumentParser(StringRef CommandLine)
37 : Input(CommandLine), Position(Input.begin()-1) {}
39 std::vector<std::string> parse() {
40 bool HasMoreInput = true;
41 while (HasMoreInput && nextNonWhitespace()) {
43 HasMoreInput = parseStringInto(Argument);
44 CommandLine.push_back(Argument);
50 // All private methods return true if there is more input available.
52 bool parseStringInto(std::string &String) {
54 if (*Position == '"') {
55 if (!parseQuotedStringInto(String)) return false;
57 if (!parseFreeStringInto(String)) return false;
59 } while (*Position != ' ');
63 bool parseQuotedStringInto(std::string &String) {
64 if (!next()) return false;
65 while (*Position != '"') {
66 if (!skipEscapeCharacter()) return false;
67 String.push_back(*Position);
68 if (!next()) return false;
73 bool parseFreeStringInto(std::string &String) {
75 if (!skipEscapeCharacter()) return false;
76 String.push_back(*Position);
77 if (!next()) return false;
78 } while (*Position != ' ' && *Position != '"');
82 bool skipEscapeCharacter() {
83 if (*Position == '\\') {
89 bool nextNonWhitespace() {
91 if (!next()) return false;
92 } while (*Position == ' ');
98 return Position != Input.end();
101 const StringRef Input;
102 StringRef::iterator Position;
103 std::vector<std::string> CommandLine;
106 std::vector<std::string> unescapeCommandLine(
107 StringRef EscapedCommandLine) {
108 CommandLineArgumentParser parser(EscapedCommandLine);
109 return parser.parse();
114 CompilationDatabase::~CompilationDatabase() {}
116 CompilationDatabase *
117 CompilationDatabase::loadFromDirectory(StringRef BuildDirectory,
118 std::string &ErrorMessage) {
119 llvm::SmallString<1024> JSONDatabasePath(BuildDirectory);
120 llvm::sys::path::append(JSONDatabasePath, "compile_commands.json");
121 llvm::OwningPtr<CompilationDatabase> Database(
122 JSONCompilationDatabase::loadFromFile(JSONDatabasePath, ErrorMessage));
126 return Database.take();
129 static CompilationDatabase *
130 findCompilationDatabaseFromDirectory(StringRef Directory) {
131 #ifdef USE_CUSTOM_COMPILATION_DATABASE
132 if (CompilationDatabase *DB =
133 ::clang::tooling::findCompilationDatabaseForDirectory(Directory))
136 while (!Directory.empty()) {
137 std::string LoadErrorMessage;
139 if (CompilationDatabase *DB =
140 CompilationDatabase::loadFromDirectory(Directory, LoadErrorMessage))
143 Directory = llvm::sys::path::parent_path(Directory);
148 CompilationDatabase *
149 CompilationDatabase::autoDetectFromSource(StringRef SourceFile,
150 std::string &ErrorMessage) {
151 llvm::SmallString<1024> AbsolutePath(getAbsolutePath(SourceFile));
152 StringRef Directory = llvm::sys::path::parent_path(AbsolutePath);
154 CompilationDatabase *DB = findCompilationDatabaseFromDirectory(Directory);
157 ErrorMessage = ("Could not auto-detect compilation database for file \"" +
158 SourceFile + "\"").str();
162 CompilationDatabase *
163 CompilationDatabase::autoDetectFromDirectory(StringRef SourceDir,
164 std::string &ErrorMessage) {
165 llvm::SmallString<1024> AbsolutePath(getAbsolutePath(SourceDir));
167 CompilationDatabase *DB = findCompilationDatabaseFromDirectory(AbsolutePath);
170 ErrorMessage = ("Could not auto-detect compilation database from directory \"" +
171 SourceDir + "\"").str();
175 FixedCompilationDatabase *
176 FixedCompilationDatabase::loadFromCommandLine(int &Argc,
179 const char **DoubleDash = std::find(Argv, Argv + Argc, StringRef("--"));
180 if (DoubleDash == Argv + Argc)
182 std::vector<std::string> CommandLine(DoubleDash + 1, Argv + Argc);
183 Argc = DoubleDash - Argv;
184 return new FixedCompilationDatabase(Directory, CommandLine);
187 FixedCompilationDatabase::
188 FixedCompilationDatabase(Twine Directory, ArrayRef<std::string> CommandLine) {
189 std::vector<std::string> ToolCommandLine(1, "clang-tool");
190 ToolCommandLine.insert(ToolCommandLine.end(),
191 CommandLine.begin(), CommandLine.end());
192 CompileCommands.push_back(CompileCommand(Directory, ToolCommandLine));
195 std::vector<CompileCommand>
196 FixedCompilationDatabase::getCompileCommands(StringRef FilePath) const {
197 std::vector<CompileCommand> Result(CompileCommands);
198 Result[0].CommandLine.push_back(FilePath);
202 std::vector<std::string>
203 FixedCompilationDatabase::getAllFiles() const {
204 return std::vector<std::string>();
207 JSONCompilationDatabase *
208 JSONCompilationDatabase::loadFromFile(StringRef FilePath,
209 std::string &ErrorMessage) {
210 llvm::OwningPtr<llvm::MemoryBuffer> DatabaseBuffer;
211 llvm::error_code Result =
212 llvm::MemoryBuffer::getFile(FilePath, DatabaseBuffer);
214 ErrorMessage = "Error while opening JSON database: " + Result.message();
217 llvm::OwningPtr<JSONCompilationDatabase> Database(
218 new JSONCompilationDatabase(DatabaseBuffer.take()));
219 if (!Database->parse(ErrorMessage))
221 return Database.take();
224 JSONCompilationDatabase *
225 JSONCompilationDatabase::loadFromBuffer(StringRef DatabaseString,
226 std::string &ErrorMessage) {
227 llvm::OwningPtr<llvm::MemoryBuffer> DatabaseBuffer(
228 llvm::MemoryBuffer::getMemBuffer(DatabaseString));
229 llvm::OwningPtr<JSONCompilationDatabase> Database(
230 new JSONCompilationDatabase(DatabaseBuffer.take()));
231 if (!Database->parse(ErrorMessage))
233 return Database.take();
236 std::vector<CompileCommand>
237 JSONCompilationDatabase::getCompileCommands(StringRef FilePath) const {
238 llvm::SmallString<128> NativeFilePath;
239 llvm::sys::path::native(FilePath, NativeFilePath);
240 llvm::StringMap< std::vector<CompileCommandRef> >::const_iterator
241 CommandsRefI = IndexByFile.find(NativeFilePath);
242 if (CommandsRefI == IndexByFile.end())
243 return std::vector<CompileCommand>();
244 const std::vector<CompileCommandRef> &CommandsRef = CommandsRefI->getValue();
245 std::vector<CompileCommand> Commands;
246 for (int I = 0, E = CommandsRef.size(); I != E; ++I) {
247 llvm::SmallString<8> DirectoryStorage;
248 llvm::SmallString<1024> CommandStorage;
249 Commands.push_back(CompileCommand(
250 // FIXME: Escape correctly:
251 CommandsRef[I].first->getValue(DirectoryStorage),
252 unescapeCommandLine(CommandsRef[I].second->getValue(CommandStorage))));
257 std::vector<std::string>
258 JSONCompilationDatabase::getAllFiles() const {
259 std::vector<std::string> Result;
261 llvm::StringMap< std::vector<CompileCommandRef> >::const_iterator
262 CommandsRefI = IndexByFile.begin();
263 const llvm::StringMap< std::vector<CompileCommandRef> >::const_iterator
264 CommandsRefEnd = IndexByFile.end();
265 for (; CommandsRefI != CommandsRefEnd; ++CommandsRefI) {
266 Result.push_back(CommandsRefI->first().str());
272 bool JSONCompilationDatabase::parse(std::string &ErrorMessage) {
273 llvm::yaml::document_iterator I = YAMLStream.begin();
274 if (I == YAMLStream.end()) {
275 ErrorMessage = "Error while parsing YAML.";
278 llvm::yaml::Node *Root = I->getRoot();
280 ErrorMessage = "Error while parsing YAML.";
283 llvm::yaml::SequenceNode *Array =
284 llvm::dyn_cast<llvm::yaml::SequenceNode>(Root);
286 ErrorMessage = "Expected array.";
289 for (llvm::yaml::SequenceNode::iterator AI = Array->begin(),
292 llvm::yaml::MappingNode *Object =
293 llvm::dyn_cast<llvm::yaml::MappingNode>(&*AI);
294 if (Object == NULL) {
295 ErrorMessage = "Expected object.";
298 llvm::yaml::ScalarNode *Directory = NULL;
299 llvm::yaml::ScalarNode *Command = NULL;
300 llvm::yaml::ScalarNode *File = NULL;
301 for (llvm::yaml::MappingNode::iterator KVI = Object->begin(),
304 llvm::yaml::Node *Value = (*KVI).getValue();
306 ErrorMessage = "Expected value.";
309 llvm::yaml::ScalarNode *ValueString =
310 llvm::dyn_cast<llvm::yaml::ScalarNode>(Value);
311 if (ValueString == NULL) {
312 ErrorMessage = "Expected string as value.";
315 llvm::yaml::ScalarNode *KeyString =
316 llvm::dyn_cast<llvm::yaml::ScalarNode>((*KVI).getKey());
317 if (KeyString == NULL) {
318 ErrorMessage = "Expected strings as key.";
321 llvm::SmallString<8> KeyStorage;
322 if (KeyString->getValue(KeyStorage) == "directory") {
323 Directory = ValueString;
324 } else if (KeyString->getValue(KeyStorage) == "command") {
325 Command = ValueString;
326 } else if (KeyString->getValue(KeyStorage) == "file") {
329 ErrorMessage = ("Unknown key: \"" +
330 KeyString->getRawValue() + "\"").str();
335 ErrorMessage = "Missing key: \"file\".";
339 ErrorMessage = "Missing key: \"command\".";
343 ErrorMessage = "Missing key: \"directory\".";
346 llvm::SmallString<8> FileStorage;
347 llvm::SmallString<128> NativeFilePath;
348 llvm::sys::path::native(File->getValue(FileStorage), NativeFilePath);
349 IndexByFile[NativeFilePath].push_back(
350 CompileCommandRef(Directory, Command));
355 } // end namespace tooling
356 } // end namespace clang