Move all the things (YES. Move them.)
Also, implemented some basic modlist logic, to be wired up.
This commit is contained in:
Petr Mrázek
259
depends/util/include/cmdutils.h
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259
depends/util/include/cmdutils.h
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/* Copyright 2013 MultiMC Contributors
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*
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* Authors: Orochimarufan <orochimarufan.x3@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef CMDUTILS_H
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#define CMDUTILS_H
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#include <exception>
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#include <QString>
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#include <QVariant>
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#include <QHash>
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#include <QStringList>
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#include "libutil_config.h"
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/**
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* @file libutil/include/cmdutils.h
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* @brief commandline parsing and processing utilities
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*/
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namespace Util {
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namespace Commandline {
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/**
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* @brief split a string into argv items like a shell would do
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* @param args the argument string
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* @return a QStringList containing all arguments
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*/
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LIBUTIL_EXPORT QStringList splitArgs(QString args);
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/**
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* @brief The FlagStyle enum
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* Specifies how flags are decorated
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*/
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namespace FlagStyle
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{
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enum LIBUTIL_EXPORT Enum
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{
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GNU, /**< --option and -o (GNU Style) */
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Unix, /**< -option and -o (Unix Style) */
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Windows, /**< /option and /o (Windows Style) */
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#ifdef Q_OS_WIN32
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Default = Windows
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#else
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Default = GNU
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#endif
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};
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}
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/**
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* @brief The ArgumentStyle enum
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*/
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namespace ArgumentStyle
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{
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enum LIBUTIL_EXPORT Enum
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{
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Space, /**< --option=value */
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Equals, /**< --option value */
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SpaceAndEquals, /**< --option[= ]value */
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#ifdef Q_OS_WIN32
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Default = Equals
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#else
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Default = SpaceAndEquals
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#endif
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};
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}
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/**
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* @brief The ParsingError class
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*/
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class LIBUTIL_EXPORT ParsingError : public std::exception
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{
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public:
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ParsingError(const QString &what);
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ParsingError(const ParsingError &e);
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~ParsingError() throw() {}
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const char *what() const throw();
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QString qwhat() const;
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private:
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QString m_what;
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};
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/**
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* @brief The Parser class
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*/
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class LIBUTIL_EXPORT Parser
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{
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public:
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/**
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* @brief Parser constructor
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* @param flagStyle the FlagStyle to use in this Parser
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* @param argStyle the ArgumentStyle to use in this Parser
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*/
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Parser(FlagStyle::Enum flagStyle = FlagStyle::Default,
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ArgumentStyle::Enum argStyle = ArgumentStyle::Default);
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/**
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* @brief set the flag style
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* @param style
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*/
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void setFlagStyle(FlagStyle::Enum style);
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/**
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* @brief get the flag style
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* @return
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*/
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FlagStyle::Enum flagStyle();
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/**
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* @brief set the argument style
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* @param style
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*/
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void setArgumentStyle(ArgumentStyle::Enum style);
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/**
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* @brief get the argument style
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* @return
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*/
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ArgumentStyle::Enum argumentStyle();
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/**
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* @brief define a boolean switch
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* @param name the parameter name
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* @param def the default value
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*/
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void addSwitch(QString name, bool def = false);
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/**
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* @brief define an option that takes an additional argument
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* @param name the parameter name
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* @param def the default value
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*/
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void addOption(QString name, QVariant def = QVariant());
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/**
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* @brief define a positional argument
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* @param name the parameter name
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* @param required wether this argument is required
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* @param def the default value
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*/
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void addArgument(QString name, bool required = true, QVariant def = QVariant());
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/**
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* @brief adds a flag to an existing parameter
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* @param name the (existing) parameter name
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* @param flag the flag character
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* @see addSwitch addArgument addOption
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* Note: any one parameter can only have one flag
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*/
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void addShortOpt(QString name, QChar flag);
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/**
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* @brief adds documentation to a Parameter
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* @param name the parameter name
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* @param metavar a string to be displayed as placeholder for the value
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* @param doc a QString containing the documentation
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* Note: on positional arguments, metavar replaces the name as displayed.
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* on options , metavar replaces the value placeholder
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*/
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void addDocumentation(QString name, QString doc, QString metavar = QString());
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/**
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* @brief generate a help message
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* @param progName the program name to use in the help message
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* @param helpIndent how much the parameter documentation should be indented
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* @param flagsInUsage whether we should use flags instead of options in the usage
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* @return a help message
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*/
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QString compileHelp(QString progName, int helpIndent = 22, bool flagsInUsage = true);
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/**
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* @brief generate a short usage message
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* @param progName the program name to use in the usage message
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* @param useFlags whether we should use flags instead of options
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* @return a usage message
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*/
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QString compileUsage(QString progName, bool useFlags = true);
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/**
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* @brief parse
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* @param argv a QStringList containing the program ARGV
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* @return a QHash mapping argument names to their values
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*/
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QHash<QString, QVariant> parse(QStringList argv);
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/**
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* @brief clear all definitions
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*/
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void clear();
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~Parser();
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private:
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FlagStyle::Enum m_flagStyle;
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ArgumentStyle::Enum m_argStyle;
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enum OptionType
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{
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otSwitch,
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otOption
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};
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// Important: the common part MUST BE COMMON ON ALL THREE structs
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struct CommonDef {
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QString name;
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QString doc;
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QString metavar;
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QVariant def;
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};
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struct OptionDef {
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// common
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QString name;
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QString doc;
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QString metavar;
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QVariant def;
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// option
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OptionType type;
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QChar flag;
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};
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struct PositionalDef {
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// common
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QString name;
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QString doc;
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QString metavar;
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QVariant def;
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// positional
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bool required;
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};
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QHash<QString, OptionDef *> m_options;
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QHash<QChar, OptionDef *> m_flags;
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QHash<QString, CommonDef *> m_params;
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QList<PositionalDef *> m_positionals;
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QList<OptionDef *> m_optionList;
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void getPrefix(QString &opt, QString &flag);
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};
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}
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}
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#endif // CMDUTILS_H
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