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/Support/FileSystem.h"
23 #include "llvm/Support/Path.h"
24 #include "llvm/Support/raw_ostream.h"
25 #include <memory>
26
27 using namespace clang;
28
29 //===----------------------------------------------------------------------===//
30 // AST Consumer Actions
31 //===----------------------------------------------------------------------===//
32
33 std::unique_ptr<ASTConsumer>
CreateASTConsumer(CompilerInstance & CI,StringRef InFile)34 HTMLPrintAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
35 if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
36 return CreateHTMLPrinter(OS, CI.getPreprocessor());
37 return nullptr;
38 }
39
FixItAction()40 FixItAction::FixItAction() {}
~FixItAction()41 FixItAction::~FixItAction() {}
42
43 std::unique_ptr<ASTConsumer>
CreateASTConsumer(CompilerInstance & CI,StringRef InFile)44 FixItAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
45 return llvm::make_unique<ASTConsumer>();
46 }
47
48 namespace {
49 class FixItRewriteInPlace : public FixItOptions {
50 public:
FixItRewriteInPlace()51 FixItRewriteInPlace() { InPlace = true; }
52
RewriteFilename(const std::string & Filename,int & fd)53 std::string RewriteFilename(const std::string &Filename, int &fd) override {
54 llvm_unreachable("don't call RewriteFilename for inplace rewrites");
55 }
56 };
57
58 class FixItActionSuffixInserter : public FixItOptions {
59 std::string NewSuffix;
60
61 public:
FixItActionSuffixInserter(std::string NewSuffix,bool FixWhatYouCan)62 FixItActionSuffixInserter(std::string NewSuffix, bool FixWhatYouCan)
63 : NewSuffix(NewSuffix) {
64 this->FixWhatYouCan = FixWhatYouCan;
65 }
66
RewriteFilename(const std::string & Filename,int & fd)67 std::string RewriteFilename(const std::string &Filename, int &fd) override {
68 fd = -1;
69 SmallString<128> Path(Filename);
70 llvm::sys::path::replace_extension(Path,
71 NewSuffix + llvm::sys::path::extension(Path));
72 return Path.str();
73 }
74 };
75
76 class FixItRewriteToTemp : public FixItOptions {
77 public:
RewriteFilename(const std::string & Filename,int & fd)78 std::string RewriteFilename(const std::string &Filename, int &fd) override {
79 SmallString<128> Path;
80 llvm::sys::fs::createTemporaryFile(llvm::sys::path::filename(Filename),
81 llvm::sys::path::extension(Filename).drop_front(), fd,
82 Path);
83 return Path.str();
84 }
85 };
86 } // end anonymous namespace
87
BeginSourceFileAction(CompilerInstance & CI,StringRef Filename)88 bool FixItAction::BeginSourceFileAction(CompilerInstance &CI,
89 StringRef Filename) {
90 const FrontendOptions &FEOpts = getCompilerInstance().getFrontendOpts();
91 if (!FEOpts.FixItSuffix.empty()) {
92 FixItOpts.reset(new FixItActionSuffixInserter(FEOpts.FixItSuffix,
93 FEOpts.FixWhatYouCan));
94 } else {
95 FixItOpts.reset(new FixItRewriteInPlace);
96 FixItOpts->FixWhatYouCan = FEOpts.FixWhatYouCan;
97 }
98 Rewriter.reset(new FixItRewriter(CI.getDiagnostics(), CI.getSourceManager(),
99 CI.getLangOpts(), FixItOpts.get()));
100 return true;
101 }
102
EndSourceFileAction()103 void FixItAction::EndSourceFileAction() {
104 // Otherwise rewrite all files.
105 Rewriter->WriteFixedFiles();
106 }
107
BeginInvocation(CompilerInstance & CI)108 bool FixItRecompile::BeginInvocation(CompilerInstance &CI) {
109
110 std::vector<std::pair<std::string, std::string> > RewrittenFiles;
111 bool err = false;
112 {
113 const FrontendOptions &FEOpts = CI.getFrontendOpts();
114 std::unique_ptr<FrontendAction> FixAction(new SyntaxOnlyAction());
115 if (FixAction->BeginSourceFile(CI, FEOpts.Inputs[0])) {
116 std::unique_ptr<FixItOptions> FixItOpts;
117 if (FEOpts.FixToTemporaries)
118 FixItOpts.reset(new FixItRewriteToTemp());
119 else
120 FixItOpts.reset(new FixItRewriteInPlace());
121 FixItOpts->Silent = true;
122 FixItOpts->FixWhatYouCan = FEOpts.FixWhatYouCan;
123 FixItOpts->FixOnlyWarnings = FEOpts.FixOnlyWarnings;
124 FixItRewriter Rewriter(CI.getDiagnostics(), CI.getSourceManager(),
125 CI.getLangOpts(), FixItOpts.get());
126 FixAction->Execute();
127
128 err = Rewriter.WriteFixedFiles(&RewrittenFiles);
129
130 FixAction->EndSourceFile();
131 CI.setSourceManager(nullptr);
132 CI.setFileManager(nullptr);
133 } else {
134 err = true;
135 }
136 }
137 if (err)
138 return false;
139 CI.getDiagnosticClient().clear();
140 CI.getDiagnostics().Reset();
141
142 PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
143 PPOpts.RemappedFiles.insert(PPOpts.RemappedFiles.end(),
144 RewrittenFiles.begin(), RewrittenFiles.end());
145 PPOpts.RemappedFilesKeepOriginalName = false;
146
147 return true;
148 }
149
150 #ifdef CLANG_ENABLE_OBJC_REWRITER
151
152 std::unique_ptr<ASTConsumer>
CreateASTConsumer(CompilerInstance & CI,StringRef InFile)153 RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
154 if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "cpp")) {
155 if (CI.getLangOpts().ObjCRuntime.isNonFragile())
156 return CreateModernObjCRewriter(InFile, OS,
157 CI.getDiagnostics(), CI.getLangOpts(),
158 CI.getDiagnosticOpts().NoRewriteMacros,
159 (CI.getCodeGenOpts().getDebugInfo() !=
160 CodeGenOptions::NoDebugInfo));
161 return CreateObjCRewriter(InFile, OS,
162 CI.getDiagnostics(), CI.getLangOpts(),
163 CI.getDiagnosticOpts().NoRewriteMacros);
164 }
165 return nullptr;
166 }
167
168 #endif
169
170 //===----------------------------------------------------------------------===//
171 // Preprocessor Actions
172 //===----------------------------------------------------------------------===//
173
ExecuteAction()174 void RewriteMacrosAction::ExecuteAction() {
175 CompilerInstance &CI = getCompilerInstance();
176 raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
177 if (!OS) return;
178
179 RewriteMacrosInInput(CI.getPreprocessor(), OS);
180 }
181
ExecuteAction()182 void RewriteTestAction::ExecuteAction() {
183 CompilerInstance &CI = getCompilerInstance();
184 raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
185 if (!OS) return;
186
187 DoRewriteTest(CI.getPreprocessor(), OS);
188 }
189
ExecuteAction()190 void RewriteIncludesAction::ExecuteAction() {
191 CompilerInstance &CI = getCompilerInstance();
192 raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
193 if (!OS) return;
194
195 RewriteIncludesInInput(CI.getPreprocessor(), OS,
196 CI.getPreprocessorOutputOpts());
197 }
198