1 //===-- ClangMove.cpp - move definition to new file -------------*- C++ -*-===//
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 #include "Move.h"
10 #include "clang/Frontend/TextDiagnosticPrinter.h"
11 #include "clang/Rewrite/Core/Rewriter.h"
12 #include "clang/Tooling/ArgumentsAdjusters.h"
13 #include "clang/Tooling/CommonOptionsParser.h"
14 #include "clang/Tooling/Refactoring.h"
15 #include "clang/Tooling/Tooling.h"
16 #include "llvm/ADT/StringRef.h"
17 #include "llvm/Support/CommandLine.h"
18 #include "llvm/Support/Path.h"
19 #include "llvm/Support/Process.h"
20 #include "llvm/Support/Signals.h"
21 #include "llvm/Support/YAMLTraits.h"
22 #include <set>
23 #include <string>
24
25 using namespace clang;
26 using namespace llvm;
27
28 namespace {
29
CreateNewFile(const llvm::Twine & path)30 std::error_code CreateNewFile(const llvm::Twine &path) {
31 int fd = 0;
32 if (std::error_code ec = llvm::sys::fs::openFileForWrite(
33 path, fd, llvm::sys::fs::CD_CreateAlways, llvm::sys::fs::OF_Text))
34 return ec;
35
36 return llvm::sys::Process::SafelyCloseFileDescriptor(fd);
37 }
38
39 cl::OptionCategory ClangMoveCategory("clang-move options");
40
41 cl::list<std::string> Names("names", cl::CommaSeparated,
42 cl::desc("The list of the names of classes being "
43 "moved, e.g. \"Foo,a::Foo,b::Foo\"."),
44 cl::cat(ClangMoveCategory));
45
46 cl::opt<std::string>
47 OldHeader("old_header",
48 cl::desc("The relative/absolute file path of old header."),
49 cl::cat(ClangMoveCategory));
50
51 cl::opt<std::string>
52 OldCC("old_cc", cl::desc("The relative/absolute file path of old cc."),
53 cl::cat(ClangMoveCategory));
54
55 cl::opt<std::string>
56 NewHeader("new_header",
57 cl::desc("The relative/absolute file path of new header."),
58 cl::cat(ClangMoveCategory));
59
60 cl::opt<std::string>
61 NewCC("new_cc", cl::desc("The relative/absolute file path of new cc."),
62 cl::cat(ClangMoveCategory));
63
64 cl::opt<bool>
65 OldDependOnNew("old_depend_on_new",
66 cl::desc("Whether old header will depend on new header. If "
67 "true, clang-move will "
68 "add #include of new header to old header."),
69 cl::init(false), cl::cat(ClangMoveCategory));
70
71 cl::opt<bool>
72 NewDependOnOld("new_depend_on_old",
73 cl::desc("Whether new header will depend on old header. If "
74 "true, clang-move will "
75 "add #include of old header to new header."),
76 cl::init(false), cl::cat(ClangMoveCategory));
77
78 cl::opt<std::string>
79 Style("style",
80 cl::desc("The style name used for reformatting. Default is \"llvm\""),
81 cl::init("llvm"), cl::cat(ClangMoveCategory));
82
83 cl::opt<bool> Dump("dump_result",
84 cl::desc("Dump results in JSON format to stdout."),
85 cl::cat(ClangMoveCategory));
86
87 cl::opt<bool> DumpDecls(
88 "dump_decls",
89 cl::desc("Dump all declarations in old header (JSON format) to stdout. If "
90 "the option is specified, other command options will be ignored. "
91 "An empty JSON will be returned if old header isn't specified."),
92 cl::cat(ClangMoveCategory));
93
94 } // namespace
95
main(int argc,const char ** argv)96 int main(int argc, const char **argv) {
97 llvm::sys::PrintStackTraceOnErrorSignal(argv[0]);
98 tooling::CommonOptionsParser OptionsParser(argc, argv, ClangMoveCategory);
99
100 if (OldDependOnNew && NewDependOnOld) {
101 llvm::errs() << "Provide either --old_depend_on_new or "
102 "--new_depend_on_old. clang-move doesn't support these two "
103 "options at same time (It will introduce include cycle).\n";
104 return 1;
105 }
106
107 tooling::RefactoringTool Tool(OptionsParser.getCompilations(),
108 OptionsParser.getSourcePathList());
109 // Add "-fparse-all-comments" compile option to make clang parse all comments.
110 Tool.appendArgumentsAdjuster(tooling::getInsertArgumentAdjuster(
111 "-fparse-all-comments", tooling::ArgumentInsertPosition::BEGIN));
112 move::MoveDefinitionSpec Spec;
113 Spec.Names = {Names.begin(), Names.end()};
114 Spec.OldHeader = OldHeader;
115 Spec.NewHeader = NewHeader;
116 Spec.OldCC = OldCC;
117 Spec.NewCC = NewCC;
118 Spec.OldDependOnNew = OldDependOnNew;
119 Spec.NewDependOnOld = NewDependOnOld;
120
121 llvm::SmallString<128> InitialDirectory;
122 if (std::error_code EC = llvm::sys::fs::current_path(InitialDirectory))
123 llvm::report_fatal_error("Cannot detect current path: " +
124 Twine(EC.message()));
125
126 move::ClangMoveContext Context{Spec, Tool.getReplacements(),
127 std::string(InitialDirectory.str()), Style,
128 DumpDecls};
129 move::DeclarationReporter Reporter;
130 move::ClangMoveActionFactory Factory(&Context, &Reporter);
131
132 int CodeStatus = Tool.run(&Factory);
133 if (CodeStatus)
134 return CodeStatus;
135
136 if (DumpDecls) {
137 llvm::outs() << "[\n";
138 const auto &Declarations = Reporter.getDeclarationList();
139 for (auto I = Declarations.begin(), E = Declarations.end(); I != E; ++I) {
140 llvm::outs() << " {\n";
141 llvm::outs() << " \"DeclarationName\": \"" << I->QualifiedName
142 << "\",\n";
143 llvm::outs() << " \"DeclarationType\": \"" << I->Kind << "\",\n";
144 llvm::outs() << " \"Templated\": " << (I->Templated ? "true" : "false")
145 << "\n";
146 llvm::outs() << " }";
147 // Don't print trailing "," at the end of last element.
148 if (I != std::prev(E))
149 llvm::outs() << ",\n";
150 }
151 llvm::outs() << "\n]\n";
152 return 0;
153 }
154
155 if (!NewCC.empty()) {
156 std::error_code EC = CreateNewFile(NewCC);
157 if (EC) {
158 llvm::errs() << "Failed to create " << NewCC << ": " << EC.message()
159 << "\n";
160 return EC.value();
161 }
162 }
163 if (!NewHeader.empty()) {
164 std::error_code EC = CreateNewFile(NewHeader);
165 if (EC) {
166 llvm::errs() << "Failed to create " << NewHeader << ": " << EC.message()
167 << "\n";
168 return EC.value();
169 }
170 }
171
172 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions());
173 clang::TextDiagnosticPrinter DiagnosticPrinter(errs(), &*DiagOpts);
174 DiagnosticsEngine Diagnostics(
175 IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs()), &*DiagOpts,
176 &DiagnosticPrinter, false);
177 auto &FileMgr = Tool.getFiles();
178 SourceManager SM(Diagnostics, FileMgr);
179 Rewriter Rewrite(SM, LangOptions());
180
181 if (!formatAndApplyAllReplacements(Tool.getReplacements(), Rewrite, Style)) {
182 llvm::errs() << "Failed applying all replacements.\n";
183 return 1;
184 }
185
186 if (Dump) {
187 std::set<llvm::StringRef> Files;
188 for (const auto &it : Tool.getReplacements())
189 Files.insert(it.first);
190 auto WriteToJson = [&](llvm::raw_ostream &OS) {
191 OS << "[\n";
192 for (auto I = Files.begin(), E = Files.end(); I != E; ++I) {
193 OS << " {\n";
194 OS << " \"FilePath\": \"" << *I << "\",\n";
195 const auto Entry = FileMgr.getFile(*I);
196 auto ID = SM.translateFile(*Entry);
197 std::string Content;
198 llvm::raw_string_ostream ContentStream(Content);
199 Rewrite.getEditBuffer(ID).write(ContentStream);
200 OS << " \"SourceText\": \""
201 << llvm::yaml::escape(ContentStream.str()) << "\"\n";
202 OS << " }";
203 if (I != std::prev(E))
204 OS << ",\n";
205 }
206 OS << "\n]\n";
207 };
208 WriteToJson(llvm::outs());
209 return 0;
210 }
211
212 return Rewrite.overwriteChangedFiles();
213 }
214