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38 * Declares gmx::CommandLineHelpModule.
40 * \author Teemu Murtola <teemu.murtola@gmail.com>
41 * \ingroup module_commandline
43 #ifndef GMX_COMMANDLINE_CMDLINEHELPMODULE_H
44 #define GMX_COMMANDLINE_CMDLINEHELPMODULE_H
48 #include "gromacs/commandline/cmdlinemodule.h"
49 #include "gromacs/onlinehelp/ihelptopic.h"
51 #include "cmdlinemodulemanager_impl.h"
56 class CommandLineHelpContext;
57 class IFileOutputRedirector;
58 class IProgramContext;
60 class CommandLineHelpModuleImpl;
64 * Command-line module for producing help.
66 * This module implements the 'help' subcommand that is automatically added by
67 * CommandLineModuleManager.
69 * \ingroup module_commandline
71 class CommandLineHelpModule : public ICommandLineModule
75 * Creates a command-line help module.
77 * \param[in] programContext Information about the running binary.
78 * \param[in] binaryName Name of the running binary
79 * (without Gromacs binary suffix or .exe on Windows).
80 * \param[in] modules List of modules for to use for module listings.
81 * \param[in] groups List of module groups.
82 * \throws std::bad_alloc if out of memory.
84 CommandLineHelpModule(const IProgramContext& programContext,
85 const std::string& binaryName,
86 const CommandLineModuleMap& modules,
87 const CommandLineModuleGroupList& groups);
88 ~CommandLineHelpModule() override;
91 * Creates a help topic for a command-line module.
93 * \param[in] module Module the create the help topic for.
94 * \throws std::bad_alloc if out of memory.
96 * The caller should add the topic using addTopic() if that is desired.
97 * This method is provided separately to allow for strong exception
98 * safety in CommandLineModuleManager::addModule().
100 HelpTopicPointer createModuleHelpTopic(const ICommandLineModule& module) const;
102 * Adds a top-level help topic.
104 * \param[in] topic Help topic to add.
105 * \param[in] bExported Whether this topic will be directly exported to
107 * \throws std::bad_alloc if out of memory.
109 void addTopic(HelpTopicPointer topic, bool bExported);
110 //! Sets whether hidden options will be shown in help.
111 void setShowHidden(bool bHidden);
113 * Sets an override to show the help for the given module.
115 * If called, the help module directly prints the help for the given
116 * module when called, skipping any other processing.
118 void setModuleOverride(const ICommandLineModule& module);
121 * Sets a file redirector for writing help output.
123 * Used for unit testing; see
124 * CommandLineModuleManager::setOutputRedirector() for more details.
126 void setOutputRedirector(IFileOutputRedirector* output);
128 const char* name() const override { return "help"; }
129 const char* shortDescription() const override { return "Print help information"; }
131 void init(CommandLineModuleSettings* settings) override { settings->setDefaultNiceLevel(0); }
132 int run(int argc, char* argv[]) override;
133 void writeHelp(const CommandLineHelpContext& context) const override;
136 typedef CommandLineHelpModuleImpl Impl;
138 std::unique_ptr<Impl> impl_;