forked from OSchip/llvm-project
107 lines
3.9 KiB
C++
107 lines
3.9 KiB
C++
//===---- tools/extra/ToolTemplate.cpp - Template for refactoring tool ----===//
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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 an empty refactoring tool using the clang tooling.
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// The goal is to lower the "barrier to entry" for writing refactoring tools.
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//
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// Usage:
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// tool-template <cmake-output-dir> <file1> <file2> ...
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//
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// Where <cmake-output-dir> is a CMake build directory in which a file named
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// compile_commands.json exists (enable -DCMAKE_EXPORT_COMPILE_COMMANDS in
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// CMake to get this output).
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//
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// <file1> ... specify the paths of files in the CMake source tree. This path
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// is looked up in the compile command database. If the path of a file is
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// absolute, it needs to point into CMake's source tree. If the path is
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// relative, the current working directory needs to be in the CMake source
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// tree and the file must be in a subdirectory of the current working
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// directory. "./" prefixes in the relative files will be automatically
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// removed, but the rest of a relative path must be a suffix of a path in
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// the compile command line database.
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//
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// For example, to use tool-template on all files in a subtree of the
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// source tree, use:
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//
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// /path/in/subtree $ find . -name '*.cpp'|
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// xargs tool-template /path/to/build
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//
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//===----------------------------------------------------------------------===//
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#include "clang/ASTMatchers/ASTMatchers.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Frontend/FrontendActions.h"
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#include "clang/Lex/Lexer.h"
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#include "clang/Tooling/CompilationDatabase.h"
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#include "clang/Tooling/Refactoring.h"
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#include "clang/Tooling/Tooling.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/MemoryBuffer.h"
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using namespace clang;
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using namespace clang::ast_matchers;
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using namespace clang::tooling;
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using namespace llvm;
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namespace {
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class ToolTemplateCallback : public MatchFinder::MatchCallback {
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public:
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ToolTemplateCallback(Replacements *Replace) : Replace(Replace) {}
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virtual void run(const MatchFinder::MatchResult &Result) {
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// TODO: This routine will get called for each thing that the matchers find.
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// At this point, you can examine the match, and do whatever you want,
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// including replacing the matched text with other text
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(void) Replace; // This to prevent an "unused member variable" warning;
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}
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private:
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Replacements *Replace;
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};
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} // end anonymous namespace
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// Set up the command line options
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cl::opt<std::string> BuildPath(
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cl::Positional,
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cl::desc("<build-path>"));
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cl::list<std::string> SourcePaths(
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cl::Positional,
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cl::desc("<source0> [... <sourceN>]"),
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cl::OneOrMore);
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int main(int argc, const char **argv) {
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llvm::OwningPtr<CompilationDatabase> Compilations(
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FixedCompilationDatabase::loadFromCommandLine(argc, argv));
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cl::ParseCommandLineOptions(argc, argv);
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if (!Compilations) { // Couldn't find a compilation DB from the command line
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std::string ErrorMessage;
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Compilations.reset(
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!BuildPath.empty() ?
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CompilationDatabase::autoDetectFromDirectory(BuildPath, ErrorMessage) :
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CompilationDatabase::autoDetectFromSource(SourcePaths[0], ErrorMessage)
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);
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// Still no compilation DB? - bail.
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if (!Compilations)
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llvm::report_fatal_error(ErrorMessage);
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}
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RefactoringTool Tool(*Compilations, SourcePaths);
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ast_matchers::MatchFinder Finder;
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ToolTemplateCallback Callback(&Tool.getReplacements());
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// TODO: Put your matchers here.
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// Use Finder.addMatcher(...) to define the patterns in the AST that you
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// want to match against. You are not limited to just one matcher!
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return Tool.run(newFrontendActionFactory(&Finder));
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}
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