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1 //===-- ClangApplyReplacementsMain.cpp - Main file for the tool -----------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 ///
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9 /// \file
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10 /// This file provides the main function for the
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11 /// clang-apply-replacements tool.
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12 ///
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13 //===----------------------------------------------------------------------===//
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14
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15 #include "clang-apply-replacements/Tooling/ApplyReplacements.h"
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16 #include "clang/Basic/Diagnostic.h"
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17 #include "clang/Basic/DiagnosticOptions.h"
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18 #include "clang/Basic/SourceManager.h"
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19 #include "clang/Basic/Version.h"
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20 #include "clang/Format/Format.h"
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21 #include "clang/Rewrite/Core/Rewriter.h"
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22 #include "llvm/ADT/STLExtras.h"
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23 #include "llvm/ADT/StringSet.h"
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24 #include "llvm/Support/CommandLine.h"
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25
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26 using namespace llvm;
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27 using namespace clang;
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28 using namespace clang::replace;
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29
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30 static cl::opt<std::string> Directory(cl::Positional, cl::Required,
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31 cl::desc("<Search Root Directory>"));
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32
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33 static cl::OptionCategory ReplacementCategory("Replacement Options");
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34 static cl::OptionCategory FormattingCategory("Formatting Options");
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35
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36 const cl::OptionCategory *VisibleCategories[] = {&ReplacementCategory,
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37 &FormattingCategory};
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38
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39 static cl::opt<bool> RemoveTUReplacementFiles(
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40 "remove-change-desc-files",
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41 cl::desc("Remove the change description files regardless of successful\n"
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42 "merging/replacing."),
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43 cl::init(false), cl::cat(ReplacementCategory));
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44
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236
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45 static cl::opt<bool> IgnoreInsertConflict(
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46 "ignore-insert-conflict",
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47 cl::desc("Ignore insert conflict and keep running to fix."),
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48 cl::init(false), cl::cat(ReplacementCategory));
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49
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150
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50 static cl::opt<bool> DoFormat(
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51 "format",
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52 cl::desc("Enable formatting of code changed by applying replacements.\n"
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53 "Use -style to choose formatting style.\n"),
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54 cl::cat(FormattingCategory));
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55
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56 // FIXME: Consider making the default behaviour for finding a style
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57 // configuration file to start the search anew for every file being changed to
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58 // handle situations where the style is different for different parts of a
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59 // project.
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60
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61 static cl::opt<std::string> FormatStyleConfig(
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62 "style-config",
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63 cl::desc("Path to a directory containing a .clang-format file\n"
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64 "describing a formatting style to use for formatting\n"
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65 "code when -style=file.\n"),
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66 cl::init(""), cl::cat(FormattingCategory));
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67
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68 static cl::opt<std::string>
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69 FormatStyleOpt("style", cl::desc(format::StyleOptionHelpDescription),
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70 cl::init("LLVM"), cl::cat(FormattingCategory));
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71
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72 namespace {
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73 // Helper object to remove the TUReplacement and TUDiagnostic (triggered by
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74 // "remove-change-desc-files" command line option) when exiting current scope.
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75 class ScopedFileRemover {
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76 public:
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77 ScopedFileRemover(const TUReplacementFiles &Files,
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78 clang::DiagnosticsEngine &Diagnostics)
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79 : TURFiles(Files), Diag(Diagnostics) {}
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80
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81 ~ScopedFileRemover() { deleteReplacementFiles(TURFiles, Diag); }
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82
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83 private:
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84 const TUReplacementFiles &TURFiles;
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85 clang::DiagnosticsEngine &Diag;
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86 };
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87 } // namespace
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88
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89 static void printVersion(raw_ostream &OS) {
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90 OS << "clang-apply-replacements version " CLANG_VERSION_STRING << "\n";
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91 }
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92
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93 int main(int argc, char **argv) {
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94 cl::HideUnrelatedOptions(makeArrayRef(VisibleCategories));
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95
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96 cl::SetVersionPrinter(printVersion);
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97 cl::ParseCommandLineOptions(argc, argv);
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98
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99 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions());
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100 DiagnosticsEngine Diagnostics(
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101 IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs()), DiagOpts.get());
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102
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103 // Determine a formatting style from options.
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104 auto FormatStyleOrError = format::getStyle(FormatStyleOpt, FormatStyleConfig,
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105 format::DefaultFallbackStyle);
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106 if (!FormatStyleOrError) {
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107 llvm::errs() << llvm::toString(FormatStyleOrError.takeError()) << "\n";
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108 return 1;
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109 }
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110 format::FormatStyle FormatStyle = std::move(*FormatStyleOrError);
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111
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112 TUReplacements TURs;
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113 TUReplacementFiles TUFiles;
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114
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115 std::error_code ErrorCode =
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116 collectReplacementsFromDirectory(Directory, TURs, TUFiles, Diagnostics);
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117
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118 TUDiagnostics TUDs;
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119 TUFiles.clear();
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120 ErrorCode =
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121 collectReplacementsFromDirectory(Directory, TUDs, TUFiles, Diagnostics);
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122
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123 if (ErrorCode) {
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124 errs() << "Trouble iterating over directory '" << Directory
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125 << "': " << ErrorCode.message() << "\n";
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126 return 1;
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127 }
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128
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129 // Remove the TUReplacementFiles (triggered by "remove-change-desc-files"
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130 // command line option) when exiting main().
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131 std::unique_ptr<ScopedFileRemover> Remover;
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132 if (RemoveTUReplacementFiles)
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133 Remover.reset(new ScopedFileRemover(TUFiles, Diagnostics));
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134
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135 FileManager Files((FileSystemOptions()));
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136 SourceManager SM(Diagnostics, Files);
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137
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138 FileToChangesMap Changes;
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236
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139 if (!mergeAndDeduplicate(TURs, TUDs, Changes, SM, IgnoreInsertConflict))
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150
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140 return 1;
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141
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142 tooling::ApplyChangesSpec Spec;
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143 Spec.Cleanup = true;
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144 Spec.Style = FormatStyle;
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145 Spec.Format = DoFormat ? tooling::ApplyChangesSpec::kAll
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146 : tooling::ApplyChangesSpec::kNone;
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147
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148 for (const auto &FileChange : Changes) {
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149 const FileEntry *Entry = FileChange.first;
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150 StringRef FileName = Entry->getName();
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151 llvm::Expected<std::string> NewFileData =
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152 applyChanges(FileName, FileChange.second, Spec, Diagnostics);
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153 if (!NewFileData) {
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154 errs() << llvm::toString(NewFileData.takeError()) << "\n";
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155 continue;
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156 }
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157
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158 // Write new file to disk
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159 std::error_code EC;
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160 llvm::raw_fd_ostream FileStream(FileName, EC, llvm::sys::fs::OF_None);
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161 if (EC) {
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162 llvm::errs() << "Could not open " << FileName << " for writing\n";
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163 continue;
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164 }
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165 FileStream << *NewFileData;
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166 }
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167
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168 return 0;
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169 }
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