80 lines
3.5 KiB
C++
80 lines
3.5 KiB
C++
//===--- CommonOptionsParser.cpp - common options for clang tools ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the CommonOptionsParser class used to parse common
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// command-line options for clang tools, so that they can be run as separate
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// command-line applications with a consistent common interface for handling
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// compilation database and input files.
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//
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// It provides a common subset of command-line options, common algorithm
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// for locating a compilation database and source files, and help messages
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// for the basic command-line interface.
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//
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// It creates a CompilationDatabase and reads common command-line options.
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//
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// This class uses the Clang Tooling infrastructure, see
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// http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html
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// for details on setting it up with LLVM source tree.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/CommandLine.h"
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#include "clang/Tooling/CommonOptionsParser.h"
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#include "clang/Tooling/Tooling.h"
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using namespace clang::tooling;
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using namespace llvm;
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const char *const CommonOptionsParser::HelpMessage =
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"\n"
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"-p <build-path> is used to read a compile command database.\n"
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"\n"
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"\tFor example, it can be a CMake build directory in which a file named\n"
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"\tcompile_commands.json exists (use -DCMAKE_EXPORT_COMPILE_COMMANDS=ON\n"
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"\tCMake option to get this output). When no build path is specified,\n"
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"\ta search for compile_commands.json will be attempted through all\n"
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"\tparent paths of the first input file . See:\n"
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"\thttp://clang.llvm.org/docs/HowToSetupToolingForLLVM.html for an\n"
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"\texample of setting up Clang Tooling on a source tree.\n"
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"\n"
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"<source0> ... specify the paths of source files. These paths are\n"
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"\tlooked up in the compile command database. If the path of a file is\n"
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"\tabsolute, it needs to point into CMake's source tree. If the path is\n"
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"\trelative, the current working directory needs to be in the CMake\n"
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"\tsource tree and the file must be in a subdirectory of the current\n"
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"\tworking directory. \"./\" prefixes in the relative files will be\n"
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"\tautomatically removed, but the rest of a relative path must be a\n"
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"\tsuffix of a path in the compile command database.\n"
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"\n";
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CommonOptionsParser::CommonOptionsParser(int &argc, const char **argv,
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const char *Overview) {
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static cl::opt<std::string> BuildPath(
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"p", cl::desc("Build path"), cl::Optional);
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static cl::list<std::string> SourcePaths(
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cl::Positional, cl::desc("<source0> [... <sourceN>]"), cl::OneOrMore);
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Compilations.reset(FixedCompilationDatabase::loadFromCommandLine(argc,
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argv));
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cl::ParseCommandLineOptions(argc, argv, Overview);
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SourcePathList = SourcePaths;
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if (!Compilations) {
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std::string ErrorMessage;
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if (!BuildPath.empty()) {
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Compilations.reset(CompilationDatabase::autoDetectFromDirectory(
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BuildPath, ErrorMessage));
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} else {
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Compilations.reset(CompilationDatabase::autoDetectFromSource(
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SourcePaths[0], ErrorMessage));
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}
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if (!Compilations)
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llvm::report_fatal_error(ErrorMessage);
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}
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}
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