1 //===-- tools/extra/clang-reorder-fields/tool/ClangReorderFields.cpp -*- 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 /// \file
10 /// This file contains the implementation of clang-reorder-fields tool
11 ///
12 //===----------------------------------------------------------------------===//
13
14 #include "../ReorderFieldsAction.h"
15 #include "clang/Basic/Diagnostic.h"
16 #include "clang/Basic/DiagnosticOptions.h"
17 #include "clang/Basic/FileManager.h"
18 #include "clang/Basic/LangOptions.h"
19 #include "clang/Basic/SourceManager.h"
20 #include "clang/Frontend/TextDiagnosticPrinter.h"
21 #include "clang/Rewrite/Core/Rewriter.h"
22 #include "clang/Tooling/CommonOptionsParser.h"
23 #include "clang/Tooling/Refactoring.h"
24 #include "clang/Tooling/Tooling.h"
25 #include "llvm/ADT/IntrusiveRefCntPtr.h"
26 #include "llvm/Support/CommandLine.h"
27 #include "llvm/Support/FileSystem.h"
28 #include <cstdlib>
29 #include <string>
30 #include <system_error>
31
32 using namespace llvm;
33 using namespace clang;
34
35 cl::OptionCategory ClangReorderFieldsCategory("clang-reorder-fields options");
36
37 static cl::opt<std::string>
38 RecordName("record-name", cl::Required,
39 cl::desc("The name of the struct/class."),
40 cl::cat(ClangReorderFieldsCategory));
41
42 static cl::list<std::string> FieldsOrder("fields-order", cl::CommaSeparated,
43 cl::OneOrMore,
44 cl::desc("The desired fields order."),
45 cl::cat(ClangReorderFieldsCategory));
46
47 static cl::opt<bool> Inplace("i", cl::desc("Overwrite edited files."),
48 cl::cat(ClangReorderFieldsCategory));
49
50 const char Usage[] = "A tool to reorder fields in C/C++ structs/classes.\n";
51
main(int argc,const char ** argv)52 int main(int argc, const char **argv) {
53 auto ExpectedParser = tooling::CommonOptionsParser::create(
54 argc, argv, ClangReorderFieldsCategory, cl::OneOrMore, Usage);
55 if (!ExpectedParser) {
56 llvm::errs() << ExpectedParser.takeError();
57 return 1;
58 }
59
60 tooling::CommonOptionsParser &OP = ExpectedParser.get();
61
62 auto Files = OP.getSourcePathList();
63 tooling::RefactoringTool Tool(OP.getCompilations(), Files);
64
65 reorder_fields::ReorderFieldsAction Action(RecordName, FieldsOrder,
66 Tool.getReplacements());
67
68 auto Factory = tooling::newFrontendActionFactory(&Action);
69
70 if (Inplace)
71 return Tool.runAndSave(Factory.get());
72
73 int ExitCode = Tool.run(Factory.get());
74 LangOptions DefaultLangOptions;
75 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions());
76 TextDiagnosticPrinter DiagnosticPrinter(errs(), &*DiagOpts);
77 DiagnosticsEngine Diagnostics(
78 IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs()), &*DiagOpts,
79 &DiagnosticPrinter, false);
80
81 auto &FileMgr = Tool.getFiles();
82 SourceManager Sources(Diagnostics, FileMgr);
83 Rewriter Rewrite(Sources, DefaultLangOptions);
84 Tool.applyAllReplacements(Rewrite);
85
86 for (const auto &File : Files) {
87 auto Entry = llvm::cantFail(FileMgr.getFileRef(File));
88 const auto ID = Sources.getOrCreateFileID(Entry, SrcMgr::C_User);
89 Rewrite.getEditBuffer(ID).write(outs());
90 }
91
92 return ExitCode;
93 }
94