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1 //===--- FrontendActions.cpp ----------------------------------------------===//
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 #include "clang/Rewrite/Frontend/FrontendActions.h"
11 #include "clang/AST/ASTConsumer.h"
12 #include "clang/Basic/FileManager.h"
13 #include "clang/Frontend/CompilerInstance.h"
14 #include "clang/Frontend/FrontendActions.h"
15 #include "clang/Frontend/FrontendDiagnostic.h"
16 #include "clang/Frontend/Utils.h"
17 #include "clang/Lex/Preprocessor.h"
18 #include "clang/Parse/Parser.h"
19 #include "clang/Rewrite/Frontend/ASTConsumers.h"
20 #include "clang/Rewrite/Frontend/FixItRewriter.h"
21 #include "clang/Rewrite/Frontend/Rewriters.h"
22 #include "llvm/ADT/OwningPtr.h"
23 #include "llvm/Support/FileSystem.h"
24 #include "llvm/Support/Path.h"
25 #include "llvm/Support/raw_ostream.h"
26
27 using namespace clang;
28
29 //===----------------------------------------------------------------------===//
30 // AST Consumer Actions
31 //===----------------------------------------------------------------------===//
32
33 ASTConsumer *HTMLPrintAction::CreateASTConsumer(CompilerInstance &CI,
34                                                 StringRef InFile) {
35   if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
36     return CreateHTMLPrinter(OS, CI.getPreprocessor());
37   return 0;
38 }
39
40 FixItAction::FixItAction() {}
41 FixItAction::~FixItAction() {}
42
43 ASTConsumer *FixItAction::CreateASTConsumer(CompilerInstance &CI,
44                                             StringRef InFile) {
45   return new ASTConsumer();
46 }
47
48 namespace {
49 class FixItRewriteInPlace : public FixItOptions {
50 public:
51   std::string RewriteFilename(const std::string &Filename, int &fd) {
52     fd = -1;
53     return Filename;
54   }
55 };
56
57 class FixItActionSuffixInserter : public FixItOptions {
58   std::string NewSuffix;
59
60 public:
61   FixItActionSuffixInserter(std::string NewSuffix, bool FixWhatYouCan)
62     : NewSuffix(NewSuffix) {
63       this->FixWhatYouCan = FixWhatYouCan;
64   }
65
66   std::string RewriteFilename(const std::string &Filename, int &fd) {
67     fd = -1;
68     SmallString<128> Path(Filename);
69     llvm::sys::path::replace_extension(Path,
70       NewSuffix + llvm::sys::path::extension(Path));
71     return Path.str();
72   }
73 };
74
75 class FixItRewriteToTemp : public FixItOptions {
76 public:
77   std::string RewriteFilename(const std::string &Filename, int &fd) {
78     SmallString<128> Path;
79     Path = llvm::sys::path::filename(Filename);
80     Path += "-%%%%%%%%";
81     Path += llvm::sys::path::extension(Filename);
82     SmallString<128> NewPath;
83     llvm::sys::fs::unique_file(Path.str(), fd, NewPath);
84     return NewPath.str();
85   }
86 };
87 } // end anonymous namespace
88
89 bool FixItAction::BeginSourceFileAction(CompilerInstance &CI,
90                                         StringRef Filename) {
91   const FrontendOptions &FEOpts = getCompilerInstance().getFrontendOpts();
92   if (!FEOpts.FixItSuffix.empty()) {
93     FixItOpts.reset(new FixItActionSuffixInserter(FEOpts.FixItSuffix,
94                                                   FEOpts.FixWhatYouCan));
95   } else {
96     FixItOpts.reset(new FixItRewriteInPlace);
97     FixItOpts->FixWhatYouCan = FEOpts.FixWhatYouCan;
98   }
99   Rewriter.reset(new FixItRewriter(CI.getDiagnostics(), CI.getSourceManager(),
100                                    CI.getLangOpts(), FixItOpts.get()));
101   return true;
102 }
103
104 void FixItAction::EndSourceFileAction() {
105   // Otherwise rewrite all files.
106   Rewriter->WriteFixedFiles();
107 }
108
109 bool FixItRecompile::BeginInvocation(CompilerInstance &CI) {
110
111   std::vector<std::pair<std::string, std::string> > RewrittenFiles;
112   bool err = false;
113   {
114     const FrontendOptions &FEOpts = CI.getFrontendOpts();
115     OwningPtr<FrontendAction> FixAction(new SyntaxOnlyAction());
116     if (FixAction->BeginSourceFile(CI, FEOpts.Inputs[0])) {
117       OwningPtr<FixItOptions> FixItOpts;
118       if (FEOpts.FixToTemporaries)
119         FixItOpts.reset(new FixItRewriteToTemp());
120       else
121         FixItOpts.reset(new FixItRewriteInPlace());
122       FixItOpts->Silent = true;
123       FixItOpts->FixWhatYouCan = FEOpts.FixWhatYouCan;
124       FixItOpts->FixOnlyWarnings = FEOpts.FixOnlyWarnings;
125       FixItRewriter Rewriter(CI.getDiagnostics(), CI.getSourceManager(),
126                              CI.getLangOpts(), FixItOpts.get());
127       FixAction->Execute();
128   
129       err = Rewriter.WriteFixedFiles(&RewrittenFiles);
130     
131       FixAction->EndSourceFile();
132       CI.setSourceManager(0);
133       CI.setFileManager(0);
134     } else {
135       err = true;
136     }
137   }
138   if (err)
139     return false;
140   CI.getDiagnosticClient().clear();
141   CI.getDiagnostics().Reset();
142
143   PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
144   PPOpts.RemappedFiles.insert(PPOpts.RemappedFiles.end(),
145                               RewrittenFiles.begin(), RewrittenFiles.end());
146   PPOpts.RemappedFilesKeepOriginalName = false;
147
148   return true;
149 }
150
151 //===----------------------------------------------------------------------===//
152 // Preprocessor Actions
153 //===----------------------------------------------------------------------===//
154
155 ASTConsumer *RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI,
156                                                   StringRef InFile) {
157   if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "cpp")) {
158     if (CI.getLangOpts().ObjCRuntime.isNonFragile())
159       return CreateModernObjCRewriter(InFile, OS,
160                                 CI.getDiagnostics(), CI.getLangOpts(),
161                                 CI.getDiagnosticOpts().NoRewriteMacros,
162                                 (CI.getCodeGenOpts().getDebugInfo() !=
163                                  CodeGenOptions::NoDebugInfo));
164     return CreateObjCRewriter(InFile, OS,
165                               CI.getDiagnostics(), CI.getLangOpts(),
166                               CI.getDiagnosticOpts().NoRewriteMacros);
167   }
168   return 0;
169 }
170
171 void RewriteMacrosAction::ExecuteAction() {
172   CompilerInstance &CI = getCompilerInstance();
173   raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
174   if (!OS) return;
175
176   RewriteMacrosInInput(CI.getPreprocessor(), OS);
177 }
178
179 void RewriteTestAction::ExecuteAction() {
180   CompilerInstance &CI = getCompilerInstance();
181   raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
182   if (!OS) return;
183
184   DoRewriteTest(CI.getPreprocessor(), OS);
185 }
186
187 void RewriteIncludesAction::ExecuteAction() {
188   CompilerInstance &CI = getCompilerInstance();
189   raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
190   if (!OS) return;
191
192   RewriteIncludesInInput(CI.getPreprocessor(), OS,
193                          CI.getPreprocessorOutputOpts());
194 }