contrib/llvm/tools/clang/lib/Tooling/Refactoring.cpp

   1 //===--- Refactoring.cpp - Framework for clang refactoring tools ----------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 //  Implements tools to support refactorings.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  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 "clang/Tooling/Refactoring.h"
  22 #include "llvm/Support/FileSystem.h"
  23 #include "llvm/Support/Path.h"
  24 #include "llvm/Support/raw_os_ostream.h"
  25
  26 namespace clang {
  27 namespace tooling {
  28
  29 RefactoringTool::RefactoringTool(
  30     const CompilationDatabase &Compilations, ArrayRef<std::string> SourcePaths,
  31     std::shared_ptr<PCHContainerOperations> PCHContainerOps)
  32     : ClangTool(Compilations, SourcePaths, PCHContainerOps) {}
  33
  34 Replacements &RefactoringTool::getReplacements() { return Replace; }
  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   return tooling::applyAllReplacements(Replace, Rewrite);
  59 }
  60
  61 int RefactoringTool::saveRewrittenFiles(Rewriter &Rewrite) {
  62   return Rewrite.overwriteChangedFiles() ? 1 : 0;
  63 }
  64
  65 bool formatAndApplyAllReplacements(const Replacements &Replaces,
  66                                    Rewriter &Rewrite, StringRef Style) {
  67   SourceManager &SM = Rewrite.getSourceMgr();
  68   FileManager &Files = SM.getFileManager();
  69
  70   auto FileToReplaces = groupReplacementsByFile(Replaces);
  71
  72   bool Result = true;
  73   for (const auto &FileAndReplaces : FileToReplaces) {
  74     const std::string &FilePath = FileAndReplaces.first;
  75     auto &CurReplaces = FileAndReplaces.second;
  76
  77     const FileEntry *Entry = Files.getFile(FilePath);
  78     FileID ID = SM.getOrCreateFileID(Entry, SrcMgr::C_User);
  79     StringRef Code = SM.getBufferData(ID);
  80
  81     format::FormatStyle CurStyle = format::getStyle(Style, FilePath, "LLVM");
  82     auto NewReplacements =
  83         format::formatReplacements(Code, CurReplaces, CurStyle);
  84     if (!NewReplacements) {
  85       llvm::errs() << llvm::toString(NewReplacements.takeError()) << "\n";
  86       return false;
  87     }
  88     Result = applyAllReplacements(*NewReplacements, Rewrite) && Result;
  89   }
  90   return Result;
  91 }
  92
  93 } // end namespace tooling
  94 } // end namespace clang