1 //===- CommonOptionsParser.h - common options for clang tools -*- C++ -*-=====//
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 implements the CommonOptionsParser class used to parse common
11 // command-line options for clang tools, so that they can be run as separate
12 // command-line applications with a consistent common interface for handling
13 // compilation database and input files.
15 // It provides a common subset of command-line options, common algorithm
16 // for locating a compilation database and source files, and help messages
17 // for the basic command-line interface.
19 // It creates a CompilationDatabase and reads common command-line options.
21 // This class uses the Clang Tooling infrastructure, see
22 // http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html
23 // for details on setting it up with LLVM source tree.
25 //===----------------------------------------------------------------------===//
27 #ifndef LLVM_CLANG_TOOLING_COMMONOPTIONSPARSER_H
28 #define LLVM_CLANG_TOOLING_COMMONOPTIONSPARSER_H
30 #include "clang/Tooling/ArgumentsAdjusters.h"
31 #include "clang/Tooling/CompilationDatabase.h"
32 #include "llvm/Support/CommandLine.h"
33 #include "llvm/Support/Error.h"
37 /// A parser for options common to all command-line Clang tools.
39 /// Parses a common subset of command-line arguments, locates and loads a
40 /// compilation commands database and runs a tool with user-specified action. It
41 /// also contains a help message for the common command-line options.
43 /// An example of usage:
45 /// #include "clang/Frontend/FrontendActions.h"
46 /// #include "clang/Tooling/CommonOptionsParser.h"
47 /// #include "clang/Tooling/Tooling.h"
48 /// #include "llvm/Support/CommandLine.h"
50 /// using namespace clang::tooling;
51 /// using namespace llvm;
53 /// static cl::OptionCategory MyToolCategory("My tool options");
54 /// static cl::extrahelp CommonHelp(CommonOptionsParser::HelpMessage);
55 /// static cl::extrahelp MoreHelp("\nMore help text...\n");
56 /// static cl::opt<bool> YourOwnOption(...);
59 /// int main(int argc, const char **argv) {
60 /// CommonOptionsParser OptionsParser(argc, argv, MyToolCategory);
61 /// ClangTool Tool(OptionsParser.getCompilations(),
62 /// OptionsParser.getSourcePathList());
63 /// return Tool.run(newFrontendActionFactory<SyntaxOnlyAction>().get());
66 class CommonOptionsParser {
68 /// Parses command-line, initializes a compilation database.
70 /// This constructor can change argc and argv contents, e.g. consume
71 /// command-line options used for creating FixedCompilationDatabase.
73 /// All options not belonging to \p Category become hidden.
75 /// This constructor exits program in case of error.
76 CommonOptionsParser(int &argc, const char **argv,
77 llvm::cl::OptionCategory &Category,
78 const char *Overview = nullptr)
79 : CommonOptionsParser(argc, argv, Category, llvm::cl::OneOrMore,
82 /// Parses command-line, initializes a compilation database.
84 /// This constructor can change argc and argv contents, e.g. consume
85 /// command-line options used for creating FixedCompilationDatabase.
87 /// All options not belonging to \p Category become hidden.
89 /// It also allows calls to set the required number of positional parameters.
90 CommonOptionsParser(int &argc, const char **argv,
91 llvm::cl::OptionCategory &Category,
92 llvm::cl::NumOccurrencesFlag OccurrencesFlag,
93 const char *Overview = nullptr);
95 /// A factory method that is similar to the above constructor, except
96 /// this returns an error instead exiting the program on error.
97 static llvm::Expected<CommonOptionsParser>
98 create(int &argc, const char **argv, llvm::cl::OptionCategory &Category,
99 llvm::cl::NumOccurrencesFlag OccurrencesFlag,
100 const char *Overview = nullptr);
102 /// Returns a reference to the loaded compilations database.
103 CompilationDatabase &getCompilations() {
104 return *Compilations;
107 /// Returns a list of source file paths to process.
108 const std::vector<std::string> &getSourcePathList() const {
109 return SourcePathList;
112 /// Returns the argument adjuster calculated from "--extra-arg" and
113 //"--extra-arg-before" options.
114 ArgumentsAdjuster getArgumentsAdjuster() { return Adjuster; }
116 static const char *const HelpMessage;
119 CommonOptionsParser() = default;
121 llvm::Error init(int &argc, const char **argv,
122 llvm::cl::OptionCategory &Category,
123 llvm::cl::NumOccurrencesFlag OccurrencesFlag,
124 const char *Overview);
126 std::unique_ptr<CompilationDatabase> Compilations;
127 std::vector<std::string> SourcePathList;
128 ArgumentsAdjuster Adjuster;
131 class ArgumentsAdjustingCompilations : public CompilationDatabase {
133 ArgumentsAdjustingCompilations(
134 std::unique_ptr<CompilationDatabase> Compilations)
135 : Compilations(std::move(Compilations)) {}
137 void appendArgumentsAdjuster(ArgumentsAdjuster Adjuster);
139 std::vector<CompileCommand>
140 getCompileCommands(StringRef FilePath) const override;
142 std::vector<std::string> getAllFiles() const override;
144 std::vector<CompileCommand> getAllCompileCommands() const override;
147 std::unique_ptr<CompilationDatabase> Compilations;
148 std::vector<ArgumentsAdjuster> Adjusters;
150 std::vector<CompileCommand>
151 adjustCommands(std::vector<CompileCommand> Commands) const;
154 } // namespace tooling
157 #endif // LLVM_TOOLS_CLANG_INCLUDE_CLANG_TOOLING_COMMONOPTIONSPARSER_H