| //===- examples/Tooling/ClangCheck.cpp - Clang check tool -----------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements a clang-check tool that runs the |
| // clang::SyntaxOnlyAction over a number of translation units. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Support/CommandLine.h" |
| #include "clang/Frontend/FrontendActions.h" |
| #include "clang/Tooling/CompilationDatabase.h" |
| #include "clang/Tooling/Tooling.h" |
| |
| using namespace clang::tooling; |
| using namespace llvm; |
| |
| cl::opt<std::string> BuildPath( |
| "p", |
| cl::desc("<build-path>"), |
| cl::Optional); |
| |
| cl::list<std::string> SourcePaths( |
| cl::Positional, |
| cl::desc("<source0> [... <sourceN>]"), |
| cl::OneOrMore); |
| |
| static cl::extrahelp MoreHelp( |
| "\n" |
| "<build-path> is used to read a compile command database.\n" |
| "\n" |
| "For example, it can be a CMake build directory in which a file named\n" |
| "compile_commands.json exists (use -DCMAKE_EXPORT_COMPILE_COMMANDS=ON\n" |
| "CMake option to get this output). When no build path is specified,\n" |
| "clang-check will attempt to locate it automatically using all parent\n" |
| "paths of the first input file.\n" |
| "\n" |
| "<source0> ... specify the paths of source files. These paths are looked\n" |
| "up in the compile command database. If the path of a file is absolute,\n" |
| "it needs to point into CMake's source tree. If the path is relative,\n" |
| "the current working directory needs to be in the CMake source tree and\n" |
| "the file must be in a subdirectory of the current working directory.\n" |
| "\"./\" prefixes in the relative files will be automatically removed,\n" |
| "but the rest of a relative path must be a suffix of a path in the\n" |
| "compile command database.\n" |
| "\n" |
| "For example, to use clang-check on all files in a subtree of the source\n" |
| "tree, use:\n" |
| "\n" |
| " find path/in/subtree -name '*.cpp'|xargs clang-check\n" |
| "\n" |
| "or using a specific build path:\n" |
| "\n" |
| " find path/in/subtree -name '*.cpp'|xargs clang-check -p build/path\n" |
| "\n" |
| "Note, that path/in/subtree and current directory should follow the\n" |
| "rules described above.\n" |
| "\n" |
| ); |
| |
| int main(int argc, const char **argv) { |
| llvm::OwningPtr<CompilationDatabase> Compilations( |
| FixedCompilationDatabase::loadFromCommandLine(argc, argv)); |
| cl::ParseCommandLineOptions(argc, argv); |
| if (!Compilations) { |
| std::string ErrorMessage; |
| if (!BuildPath.empty()) { |
| Compilations.reset( |
| CompilationDatabase::autoDetectFromDirectory(BuildPath, ErrorMessage)); |
| } else { |
| Compilations.reset(CompilationDatabase::autoDetectFromSource( |
| SourcePaths[0], ErrorMessage)); |
| } |
| if (!Compilations) |
| llvm::report_fatal_error(ErrorMessage); |
| } |
| ClangTool Tool(*Compilations, SourcePaths); |
| return Tool.run(newFrontendActionFactory<clang::SyntaxOnlyAction>()); |
| } |