clang-tools  7.0.0
ClangTidyOptions.h
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1 //===--- ClangTidyOptions.h - clang-tidy ------------------------*- C++ -*-===//
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 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_CLANGTIDYOPTIONS_H
11 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_CLANGTIDYOPTIONS_H
12 
13 #include "llvm/ADT/Optional.h"
14 #include "llvm/ADT/StringMap.h"
15 #include "llvm/ADT/StringRef.h"
16 #include "llvm/ADT/IntrusiveRefCntPtr.h"
17 #include "llvm/Support/ErrorOr.h"
18 #include "clang/Basic/VirtualFileSystem.h"
19 #include <functional>
20 #include <map>
21 #include <string>
22 #include <system_error>
23 #include <utility>
24 #include <vector>
25 
26 namespace clang {
27 namespace tidy {
28 
29 /// \brief Contains a list of line ranges in a single file.
30 struct FileFilter {
31  /// \brief File name.
32  std::string Name;
33 
34  /// \brief LineRange is a pair<start, end> (inclusive).
35  typedef std::pair<unsigned, unsigned> LineRange;
36 
37  /// \brief A list of line ranges in this file, for which we show warnings.
38  std::vector<LineRange> LineRanges;
39 };
40 
41 /// \brief Global options. These options are neither stored nor read from
42 /// configuration files.
44  /// \brief Output warnings from certain line ranges of certain files only.
45  /// If empty, no warnings will be filtered.
46  std::vector<FileFilter> LineFilter;
47 };
48 
49 /// \brief Contains options for clang-tidy. These options may be read from
50 /// configuration files, and may be different for different translation units.
52  /// \brief These options are used for all settings that haven't been
53  /// overridden by the \c OptionsProvider.
54  ///
55  /// Allow no checks and no headers by default. This method initializes
56  /// check-specific options by calling \c ClangTidyModule::getModuleOptions()
57  /// of each registered \c ClangTidyModule.
58  static ClangTidyOptions getDefaults();
59 
60  /// \brief Creates a new \c ClangTidyOptions instance combined from all fields
61  /// of this instance overridden by the fields of \p Other that have a value.
62  ClangTidyOptions mergeWith(const ClangTidyOptions &Other) const;
63 
64  /// \brief Checks filter.
65  llvm::Optional<std::string> Checks;
66 
67  /// \brief WarningsAsErrors filter.
68  llvm::Optional<std::string> WarningsAsErrors;
69 
70  /// \brief Output warnings from headers matching this filter. Warnings from
71  /// main files will always be displayed.
72  llvm::Optional<std::string> HeaderFilterRegex;
73 
74  /// \brief Output warnings from system headers matching \c HeaderFilterRegex.
75  llvm::Optional<bool> SystemHeaders;
76 
77  /// \brief Format code around applied fixes with clang-format using this
78  /// style.
79  ///
80  /// Can be one of:
81  /// * 'none' - don't format code around applied fixes;
82  /// * 'llvm', 'google', 'mozilla' or other predefined clang-format style
83  /// names;
84  /// * 'file' - use the .clang-format file in the closest parent directory of
85  /// each source file;
86  /// * '{inline-formatting-style-in-yaml-format}'.
87  ///
88  /// See clang-format documentation for more about configuring format style.
89  llvm::Optional<std::string> FormatStyle;
90 
91  /// \brief Specifies the name or e-mail of the user running clang-tidy.
92  ///
93  /// This option is used, for example, to place the correct user name in TODO()
94  /// comments in the relevant check.
95  llvm::Optional<std::string> User;
96 
97  typedef std::pair<std::string, std::string> StringPair;
98  typedef std::map<std::string, std::string> OptionMap;
99 
100  /// \brief Key-value mapping used to store check-specific options.
101  OptionMap CheckOptions;
102 
103  typedef std::vector<std::string> ArgList;
104 
105  /// \brief Add extra compilation arguments to the end of the list.
106  llvm::Optional<ArgList> ExtraArgs;
107 
108  /// \brief Add extra compilation arguments to the start of the list.
109  llvm::Optional<ArgList> ExtraArgsBefore;
110 };
111 
112 /// \brief Abstract interface for retrieving various ClangTidy options.
114 public:
115  static const char OptionsSourceTypeDefaultBinary[];
116  static const char OptionsSourceTypeCheckCommandLineOption[];
117  static const char OptionsSourceTypeConfigCommandLineOption[];
118 
120 
121  /// \brief Returns global options, which are independent of the file.
122  virtual const ClangTidyGlobalOptions &getGlobalOptions() = 0;
123 
124  /// \brief ClangTidyOptions and its source.
125  //
126  /// clang-tidy has 3 types of the sources in order of increasing priority:
127  /// * clang-tidy binary.
128  /// * '-config' commandline option or a specific configuration file. If the
129  /// commandline option is specified, clang-tidy will ignore the
130  /// configuration file.
131  /// * '-checks' commandline option.
132  typedef std::pair<ClangTidyOptions, std::string> OptionsSource;
133 
134  /// \brief Returns an ordered vector of OptionsSources, in order of increasing
135  /// priority.
136  virtual std::vector<OptionsSource>
137  getRawOptions(llvm::StringRef FileName) = 0;
138 
139  /// \brief Returns options applying to a specific translation unit with the
140  /// specified \p FileName.
141  ClangTidyOptions getOptions(llvm::StringRef FileName);
142 };
143 
144 /// \brief Implementation of the \c ClangTidyOptionsProvider interface, which
145 /// returns the same options for all files.
147 public:
149  const ClangTidyOptions &Options)
150  : GlobalOptions(GlobalOptions), DefaultOptions(Options) {}
152  return GlobalOptions;
153  }
154  std::vector<OptionsSource> getRawOptions(llvm::StringRef FileName) override;
155 
156 private:
157  ClangTidyGlobalOptions GlobalOptions;
158  ClangTidyOptions DefaultOptions;
159 };
160 
161 /// \brief Implementation of ClangTidyOptions interface, which is used for
162 /// '-config' command-line option.
164 public:
165  ConfigOptionsProvider(const ClangTidyGlobalOptions &GlobalOptions,
166  const ClangTidyOptions &DefaultOptions,
167  const ClangTidyOptions &ConfigOptions,
168  const ClangTidyOptions &OverrideOptions);
169  std::vector<OptionsSource> getRawOptions(llvm::StringRef FileName) override;
170 
171 private:
172  ClangTidyOptions ConfigOptions;
173  ClangTidyOptions OverrideOptions;
174 };
175 
176 /// \brief Implementation of the \c ClangTidyOptionsProvider interface, which
177 /// tries to find a configuration file in the closest parent directory of each
178 /// source file.
179 ///
180 /// By default, files named ".clang-tidy" will be considered, and the
181 /// \c clang::tidy::parseConfiguration function will be used for parsing, but a
182 /// custom set of configuration file names and parsing functions can be
183 /// specified using the appropriate constructor.
185 public:
186  // \brief A pair of configuration file base name and a function parsing
187  // configuration from text in the corresponding format.
188  typedef std::pair<std::string, std::function<llvm::ErrorOr<ClangTidyOptions>(
189  llvm::StringRef)>>
191 
192  /// \brief Configuration file handlers listed in the order of priority.
193  ///
194  /// Custom configuration file formats can be supported by constructing the
195  /// list of handlers and passing it to the appropriate \c FileOptionsProvider
196  /// constructor. E.g. initialization of a \c FileOptionsProvider with support
197  /// of a custom configuration file format for files named ".my-tidy-config"
198  /// could look similar to this:
199  /// \code
200  /// FileOptionsProvider::ConfigFileHandlers ConfigHandlers;
201  /// ConfigHandlers.emplace_back(".my-tidy-config", parseMyConfigFormat);
202  /// ConfigHandlers.emplace_back(".clang-tidy", parseConfiguration);
203  /// return llvm::make_unique<FileOptionsProvider>(
204  /// GlobalOptions, DefaultOptions, OverrideOptions, ConfigHandlers);
205  /// \endcode
206  ///
207  /// With the order of handlers shown above, the ".my-tidy-config" file would
208  /// take precedence over ".clang-tidy" if both reside in the same directory.
209  typedef std::vector<ConfigFileHandler> ConfigFileHandlers;
210 
211  /// \brief Initializes the \c FileOptionsProvider instance.
212  ///
213  /// \param GlobalOptions are just stored and returned to the caller of
214  /// \c getGlobalOptions.
215  ///
216  /// \param DefaultOptions are used for all settings not specified in a
217  /// configuration file.
218  ///
219  /// If any of the \param OverrideOptions fields are set, they will override
220  /// whatever options are read from the configuration file.
221  FileOptionsProvider(const ClangTidyGlobalOptions &GlobalOptions,
222  const ClangTidyOptions &DefaultOptions,
223  const ClangTidyOptions &OverrideOptions,
224  llvm::IntrusiveRefCntPtr<vfs::FileSystem> FS = nullptr);
225 
226  /// \brief Initializes the \c FileOptionsProvider instance with a custom set
227  /// of configuration file handlers.
228  ///
229  /// \param GlobalOptions are just stored and returned to the caller of
230  /// \c getGlobalOptions.
231  ///
232  /// \param DefaultOptions are used for all settings not specified in a
233  /// configuration file.
234  ///
235  /// If any of the \param OverrideOptions fields are set, they will override
236  /// whatever options are read from the configuration file.
237  ///
238  /// \param ConfigHandlers specifies a custom set of configuration file
239  /// handlers. Each handler is a pair of configuration file name and a function
240  /// that can parse configuration from this file type. The configuration files
241  /// in each directory are searched for in the order of appearance in
242  /// \p ConfigHandlers.
243  FileOptionsProvider(const ClangTidyGlobalOptions &GlobalOptions,
244  const ClangTidyOptions &DefaultOptions,
245  const ClangTidyOptions &OverrideOptions,
246  const ConfigFileHandlers &ConfigHandlers);
247 
248  std::vector<OptionsSource> getRawOptions(llvm::StringRef FileName) override;
249 
250 protected:
251  /// \brief Try to read configuration files from \p Directory using registered
252  /// \c ConfigHandlers.
253  llvm::Optional<OptionsSource> tryReadConfigFile(llvm::StringRef Directory);
254 
255  llvm::StringMap<OptionsSource> CachedOptions;
257  ConfigFileHandlers ConfigHandlers;
258  llvm::IntrusiveRefCntPtr<vfs::FileSystem> FS;
259 };
260 
261 /// \brief Parses LineFilter from JSON and stores it to the \p Options.
262 std::error_code parseLineFilter(llvm::StringRef LineFilter,
263  ClangTidyGlobalOptions &Options);
264 
265 /// \brief Parses configuration from JSON and returns \c ClangTidyOptions or an
266 /// error.
267 llvm::ErrorOr<ClangTidyOptions> parseConfiguration(llvm::StringRef Config);
268 
269 /// \brief Serializes configuration to a YAML-encoded string.
270 std::string configurationAsText(const ClangTidyOptions &Options);
271 
272 } // end namespace tidy
273 } // end namespace clang
274 
275 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_CLANGTIDYOPTIONS_H
llvm::Optional< std::string > Checks
Checks filter.
llvm::Optional< ArgList > ExtraArgs
Add extra compilation arguments to the end of the list.
Implementation of the ClangTidyOptionsProvider interface, which tries to find a configuration file in...
llvm::Optional< std::string > User
Specifies the name or e-mail of the user running clang-tidy.
std::vector< std::string > ArgList
std::pair< std::string, std::string > StringPair
Implementation of ClangTidyOptions interface, which is used for &#39;-config&#39; command-line option...
llvm::IntrusiveRefCntPtr< vfs::FileSystem > FS
static cl::opt< std::string > Config("config", cl::desc(R"( Specifies a configuration in YAML/JSON format: -config="{Checks:' *', CheckOptions:[{key:x, value:y}]}" When the value is empty, clang-tidy will attempt to find a file named .clang-tidy for each source file in its parent directories. )"), cl::init(""), cl::cat(ClangTidyCategory))
llvm::Optional< std::string > HeaderFilterRegex
Output warnings from headers matching this filter.
Contains options for clang-tidy.
std::error_code parseLineFilter(StringRef LineFilter, clang::tidy::ClangTidyGlobalOptions &Options)
Parses -line-filter option and stores it to the Options.
llvm::ErrorOr< ClangTidyOptions > parseConfiguration(StringRef Config)
OptionMap CheckOptions
Key-value mapping used to store check-specific options.
llvm::Optional< bool > SystemHeaders
Output warnings from system headers matching HeaderFilterRegex.
llvm::Optional< ArgList > ExtraArgsBefore
Add extra compilation arguments to the start of the list.
llvm::Optional< std::string > FormatStyle
Format code around applied fixes with clang-format using this style.
static cl::opt< std::string > Directory(cl::Positional, cl::Required, cl::desc("<Search Root Directory>"))
static cl::opt< std::string > LineFilter("line-filter", cl::desc(R"( List of files with line ranges to filter the warnings. Can be used together with -header-filter. The format of the list is a JSON array of objects: [ {"name":"file1.cpp","lines":[[1,3],[5,7]]}, {"name":"file2.h"} ] )"), cl::init(""), cl::cat(ClangTidyCategory))
std::pair< unsigned, unsigned > LineRange
LineRange is a pair<start, end> (inclusive).
std::string configurationAsText(const ClangTidyOptions &Options)
Serializes configuration to a YAML-encoded string.
llvm::StringMap< OptionsSource > CachedOptions
std::map< std::string, std::string > OptionMap
std::vector< FileFilter > LineFilter
Output warnings from certain line ranges of certain files only.
PathRef FileName
std::pair< std::string, std::function< llvm::ErrorOr< ClangTidyOptions > llvm::StringRef)> > ConfigFileHandler
llvm::Optional< std::string > WarningsAsErrors
WarningsAsErrors filter.
std::vector< ConfigFileHandler > ConfigFileHandlers
Configuration file handlers listed in the order of priority.
Contains a list of line ranges in a single file.
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
DefaultOptionsProvider(const ClangTidyGlobalOptions &GlobalOptions, const ClangTidyOptions &Options)
std::pair< ClangTidyOptions, std::string > OptionsSource
ClangTidyOptions and its source.
std::vector< LineRange > LineRanges
A list of line ranges in this file, for which we show warnings.
Abstract interface for retrieving various ClangTidy options.
const ClangTidyGlobalOptions & getGlobalOptions() override
Returns global options, which are independent of the file.
std::string Name
File name.
Implementation of the ClangTidyOptionsProvider interface, which returns the same options for all file...