1 //===--- Refactoring.cpp - Framework for clang refactoring tools ----------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // Implements tools to support refactorings. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "clang/Tooling/Refactoring.h" 14 #include "clang/Basic/DiagnosticOptions.h" 15 #include "clang/Basic/FileManager.h" 16 #include "clang/Basic/SourceManager.h" 17 #include "clang/Format/Format.h" 18 #include "clang/Frontend/TextDiagnosticPrinter.h" 19 #include "clang/Lex/Lexer.h" 20 #include "clang/Rewrite/Core/Rewriter.h" 21 #include "llvm/Support/Path.h" 22 #include "llvm/Support/raw_os_ostream.h" 23 24 namespace clang { 25 namespace tooling { 26 27 RefactoringTool::RefactoringTool( 28 const CompilationDatabase &Compilations, ArrayRef<std::string> SourcePaths, 29 std::shared_ptr<PCHContainerOperations> PCHContainerOps) 30 : ClangTool(Compilations, SourcePaths, std::move(PCHContainerOps)) {} 31 32 std::map<std::string, Replacements> &RefactoringTool::getReplacements() { 33 return FileToReplaces; 34 } 35 36 int RefactoringTool::runAndSave(FrontendActionFactory *ActionFactory) { 37 if (int Result = run(ActionFactory)) { 38 return Result; 39 } 40 41 LangOptions DefaultLangOptions; 42 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions(); 43 TextDiagnosticPrinter DiagnosticPrinter(llvm::errs(), &*DiagOpts); 44 DiagnosticsEngine Diagnostics( 45 IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs()), 46 &*DiagOpts, &DiagnosticPrinter, false); 47 SourceManager Sources(Diagnostics, getFiles()); 48 Rewriter Rewrite(Sources, DefaultLangOptions); 49 50 if (!applyAllReplacements(Rewrite)) { 51 llvm::errs() << "Skipped some replacements.\n"; 52 } 53 54 return saveRewrittenFiles(Rewrite); 55 } 56 57 bool RefactoringTool::applyAllReplacements(Rewriter &Rewrite) { 58 bool Result = true; 59 for (const auto &Entry : groupReplacementsByFile( 60 Rewrite.getSourceMgr().getFileManager(), FileToReplaces)) 61 Result = tooling::applyAllReplacements(Entry.second, Rewrite) && Result; 62 return Result; 63 } 64 65 int RefactoringTool::saveRewrittenFiles(Rewriter &Rewrite) { 66 return Rewrite.overwriteChangedFiles() ? 1 : 0; 67 } 68 69 bool formatAndApplyAllReplacements( 70 const std::map<std::string, Replacements> &FileToReplaces, 71 Rewriter &Rewrite, StringRef Style) { 72 SourceManager &SM = Rewrite.getSourceMgr(); 73 FileManager &Files = SM.getFileManager(); 74 75 bool Result = true; 76 for (const auto &FileAndReplaces : groupReplacementsByFile( 77 Rewrite.getSourceMgr().getFileManager(), FileToReplaces)) { 78 const std::string &FilePath = FileAndReplaces.first; 79 auto &CurReplaces = FileAndReplaces.second; 80 81 const FileEntry *Entry = nullptr; 82 if (auto File = Files.getFile(FilePath)) 83 Entry = *File; 84 85 FileID ID = SM.getOrCreateFileID(Entry, SrcMgr::C_User); 86 StringRef Code = SM.getBufferData(ID); 87 88 auto CurStyle = format::getStyle(Style, FilePath, "LLVM"); 89 if (!CurStyle) { 90 llvm::errs() << llvm::toString(CurStyle.takeError()) << "\n"; 91 return false; 92 } 93 94 auto NewReplacements = 95 format::formatReplacements(Code, CurReplaces, *CurStyle); 96 if (!NewReplacements) { 97 llvm::errs() << llvm::toString(NewReplacements.takeError()) << "\n"; 98 return false; 99 } 100 Result = applyAllReplacements(*NewReplacements, Rewrite) && Result; 101 } 102 return Result; 103 } 104 105 } // end namespace tooling 106 } // end namespace clang 107