2 * This file is part of the GROMACS molecular simulation package.
4 * Copyright (c) 2012,2013,2014, by the GROMACS development team, led by
5 * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
6 * and including many others, as listed in the AUTHORS file in the
7 * top-level source directory and at http://www.gromacs.org.
9 * GROMACS is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public License
11 * as published by the Free Software Foundation; either version 2.1
12 * of the License, or (at your option) any later version.
14 * GROMACS is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with GROMACS; if not, see
21 * http://www.gnu.org/licenses, or write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 * If you want to redistribute modifications to GROMACS, please
25 * consider that scientific software is very special. Version
26 * control is crucial - bugs must be traceable. We will be happy to
27 * consider code for inclusion in the official distribution, but
28 * derived work must not be called official GROMACS. Details are found
29 * in the README & COPYING files - if they are missing, get the
30 * official version at http://www.gromacs.org.
32 * To help us fund GROMACS development, we humbly ask that you cite
33 * the research papers on the package. Check out http://www.gromacs.org.
37 * Declares gmx::CommandLineModuleManager.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
41 * \ingroup module_commandline
43 #ifndef GMX_COMMANDLINE_CMDLINEMODULEMANAGER_H
44 #define GMX_COMMANDLINE_CMDLINEMODULEMANAGER_H
46 #include "../onlinehelp/helptopicinterface.h"
47 #include "../utility/common.h"
48 #include "../utility/uniqueptr.h"
53 class CommandLineModuleGroup;
54 class CommandLineModuleGroupData;
55 class CommandLineModuleInterface;
58 //! Smart pointer type for managing a CommandLineModuleInterface.
59 typedef gmx_unique_ptr<CommandLineModuleInterface>::type
60 CommandLineModulePointer;
63 * Implements a wrapper command-line interface for multiple modules.
67 int main(int argc, char *argv[])
69 gmx::ProgramInfo &programInfo = gmx::init(&argc, &argv);
72 gmx::CommandLineModuleManager manager("gmx", &programInfo);
73 // <register all necessary modules>
74 int rc = manager.run(argc, argv);
78 catch (const std::exception &ex)
80 gmx::printFatalErrorMessage(stderr, ex);
81 return gmx::processExceptionAtExit(ex);
87 * \ingroup module_commandline
89 class CommandLineModuleManager
92 //! Function pointer type for a C main function.
93 typedef int (*CMainFunction)(int argc, char *argv[]);
96 * Implements a main() method that runs a single module.
98 * \param argc \c argc passed to main().
99 * \param argv \c argv passed to main().
100 * \param module Module to run.
102 * This method allows for uniform behavior for binaries that only
103 * contain a single module without duplicating any of the
104 * implementation from CommandLineModuleManager (startup headers,
105 * common options etc.).
107 * The signature assumes that \p module construction does not throw
108 * (because otherwise the caller would need to duplicate all the
109 * exception handling code). It is possible to move the construction
110 * inside the try/catch in this method using an indirection similar to
111 * TrajectoryAnalysisCommandLineRunner::runAsMain(), but until that is
112 * necessary, the current approach leads to simpler code.
116 int main(int argc, char *argv[])
118 CustomCommandLineModule module;
119 return gmx::CommandLineModuleManager::runAsMainSingleModule(argc, argv, &module);
123 * Does not throw. All exceptions are caught and handled internally.
125 static int runAsMainSingleModule(int argc, char *argv[],
126 CommandLineModuleInterface *module);
128 * Implements a main() method that runs a given function.
130 * \param argc \c argc passed to main().
131 * \param argv \c argv passed to main().
132 * \param mainFunction The main()-like method to wrap.
134 * This method creates a dummy command-line module that does its
135 * processing by calling \p mainFunction; see addModuleCMain() for
136 * details. It then runs this module with runAsMainSingleModule().
137 * This allows the resulting executable to handle common options and do
138 * other common actions (e.g., startup headers) without duplicate code
139 * in the main methods.
143 int my_main(int argc, char *argv[])
148 int main(int argc, char *argv[])
150 return gmx::CommandLineModuleManager::runAsMainCMain(argc, argv, &my_main);
154 * Does not throw. All exceptions are caught and handled internally.
156 static int runAsMainCMain(int argc, char *argv[],
157 CMainFunction mainFunction);
160 * Initializes a command-line module manager.
162 * \param[in] binaryName Name of the running binary
163 * (without Gromacs binary suffix or .exe on Windows).
164 * \param programInfo Program information for the running binary.
165 * \throws std::bad_alloc if out of memory.
167 * \p binaryName is used to detect when the binary is run through a
168 * symlink, and automatically invoke a matching module in such a case.
170 * \p programInfo is non-const to allow the manager to amend it based
171 * on the actual module that is getting executed.
173 CommandLineModuleManager(const char *binaryName,
174 ProgramInfo *programInfo);
175 ~CommandLineModuleManager();
178 * Sets the module manager to quiet mode: don't print anything.
180 * \param[in] bQuiet Whether the module manager should remain silent.
182 * Normally, the module manager prints out some information to stderr
183 * before it starts the module and after it finishes. This removes
184 * that output, which is useful in particular for unit tests so that
185 * they don't spam stderr.
187 void setQuiet(bool bQuiet);
190 * Makes the manager always run a single module.
192 * \param module Module to run.
194 * This method disables all mechanisms for selecting a module, and
195 * directly passes all command-line arguments to \p module.
196 * Help arguments are an exception: these are still recognized by the
197 * manager and translated into a call to
198 * CommandLineModuleInterface::writeHelp().
200 * This is public mainly for unit testing purposes; for other code,
201 * runAsMainSingleModule() typically provides the desired
206 void setSingleModule(CommandLineModuleInterface *module);
208 * Adds a given module to this manager.
210 * \param module Module to add.
211 * \throws std::bad_alloc if out of memory.
213 * The manager takes ownership of the object.
215 * This method is public mostly for testing purposes; for typical uses,
216 * registerModule() is a more convenient way of adding modules.
218 * \see registerModule()
220 void addModule(CommandLineModulePointer module);
222 * Adds a module that runs a given main()-like function.
224 * \param[in] name Name for the module.
225 * \param[in] shortDescription One-line description for the module.
226 * \param[in] mainFunction Main function to wrap.
227 * \throws std::bad_alloc if out of memory.
229 * There is normally no need to call this method outside the Gromacs
230 * library. User code usually wants to use runAsMainCMain().
232 * \p name and \p shortDescription should be string constants, or the
233 * caller should otherwise ensure that they stay in scope for the
234 * duration the CommandLineModuleManager object exists.
235 * \p mainFunction should call parse_common_args() to process its
236 * command-line arguments.
238 void addModuleCMain(const char *name, const char *shortDescription,
239 CMainFunction mainFunction);
241 * Registers a module of a certain type to this manager.
243 * \tparam Module Type of module to register.
244 * \throws std::bad_alloc if out of memory.
246 * \p Module must be default-constructible and implement
247 * CommandLineModuleInterface.
249 * This method is provided as a convenient alternative to addModule()
250 * for cases where each module is implemented by a different type
251 * (which should be the case for typical situations outside unit
254 template <class Module>
255 void registerModule()
257 addModule(CommandLineModulePointer(new Module));
261 * Adds a group for modules to use in help output.
263 * \param[in] title Short title for the group.
264 * \returns Handle that can be used to add modules to the group.
265 * \throws std::bad_alloc if out of memory.
267 * Creates a group that is used to structure the list of all modules in
268 * help output. Modules are added to the group using the returned
271 CommandLineModuleGroup addModuleGroup(const char *title);
274 * Makes given help topic available through the manager's help module.
276 * \param[in] topic Help topic to add.
277 * \throws std::bad_alloc if out of memory.
279 * The manager takes ownership of the help topic.
281 void addHelpTopic(HelpTopicPointer topic);
284 * Runs a module based on given command line.
286 * \param[in] argc Number of elements in \p argv.
287 * \param[in] argv Command-line arguments.
288 * \throws unspecified Throws any exception that the selected module
290 * \returns Exit code for the program.
291 * \retval 0 on successful termination.
292 * \retval 2 if no module is specified, or if the module is not found.
294 * Runs the module whose name matches \p argv[1].
296 int run(int argc, char *argv[]);
301 PrivateImplPointer<Impl> impl_;
305 * Handle to add content to a group added with
306 * CommandLineModuleManager::addModuleGroup().
308 * This class only provides a public interface to construct a module group for
309 * CommandLineModuleManager, and has semantics similar to a pointer: copies all
310 * point to the same group. The actual state of the group is maintained in an
311 * internal implementation class.
314 * \ingroup module_commandline
316 class CommandLineModuleGroup
319 /*! \cond internal */
320 //! Shorthand for the implementation type that holds all the data.
321 typedef CommandLineModuleGroupData Impl;
323 //! Creates a new group (only called by CommandLineModuleManager).
324 explicit CommandLineModuleGroup(Impl *impl) : impl_(impl) {}
328 * Adds a module to this group.
330 * \param[in] name Name of the module.
331 * \throws std::bad_alloc if out of memory.
333 * This works as addModuleWithDescription(), but uses the short
334 * description of the module itself as the description.
336 * \see addModuleWithDescription()
338 void addModule(const char *name);
340 * Adds a module to this group with a custom description.
342 * \param[in] name Name of the module.
343 * \param[in] description Description of the module in this group.
344 * \throws std::bad_alloc if out of memory.
346 * \p name must name a module added into the CommandLineModuleManager.
347 * It is possible to add the same module into multiple groups.
349 void addModuleWithDescription(const char *name, const char *description);
352 //! Pointer to the data owned by CommandLineModuleManager.