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1 <?php
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2
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3 /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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4
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5 /**
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6 * This file is part of the PEAR Console_CommandLine package.
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7 *
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8 * PHP version 5
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9 *
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10 * LICENSE: This source file is subject to the MIT license that is available
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11 * through the world-wide-web at the following URI:
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12 * http://opensource.org/licenses/mit-license.php
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13 *
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14 * @category Console
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15 * @package Console_CommandLine
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16 * @author David JEAN LOUIS <izimobil@gmail.com>
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17 * @copyright 2007 David JEAN LOUIS
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18 * @license http://opensource.org/licenses/mit-license.php MIT License
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19 * @version CVS: $Id$
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20 * @link http://pear.php.net/package/Console_CommandLine
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21 * @since File available since release 0.1.0
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22 * @filesource
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23 */
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24
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25 /**
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26 * Required by this class.
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27 */
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28 require_once 'Console/CommandLine.php';
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29 require_once 'Console/CommandLine/Element.php';
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30
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31 /**
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32 * Class that represent a commandline option.
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33 *
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34 * @category Console
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35 * @package Console_CommandLine
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36 * @author David JEAN LOUIS <izimobil@gmail.com>
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37 * @copyright 2007 David JEAN LOUIS
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38 * @license http://opensource.org/licenses/mit-license.php MIT License
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39 * @version Release: @package_version@
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40 * @link http://pear.php.net/package/Console_CommandLine
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41 * @since Class available since release 0.1.0
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42 */
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43 class Console_CommandLine_Option extends Console_CommandLine_Element
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44 {
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45 // Public properties {{{
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46
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47 /**
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48 * The option short name (ex: -v).
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49 *
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50 * @var string $short_name Short name of the option
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51 */
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52 public $short_name;
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53
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54 /**
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55 * The option long name (ex: --verbose).
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56 *
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57 * @var string $long_name Long name of the option
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58 */
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59 public $long_name;
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60
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61 /**
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62 * The option action, defaults to "StoreString".
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63 *
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64 * @var string $action Option action
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65 */
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66 public $action = 'StoreString';
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67
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68 /**
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69 * An array of possible values for the option. If this array is not empty
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70 * and the value passed is not in the array an exception is raised.
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71 * This only make sense for actions that accept values of course.
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72 *
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73 * @var array $choices Valid choices for the option
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74 */
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75 public $choices = array();
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76
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77 /**
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78 * The callback function (or method) to call for an action of type
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79 * Callback, this can be any callable supported by the php function
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80 * call_user_func.
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81 *
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82 * Example:
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83 *
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84 * <code>
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85 * $parser->addOption('myoption', array(
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86 * 'short_name' => '-m',
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87 * 'long_name' => '--myoption',
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88 * 'action' => 'Callback',
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89 * 'callback' => 'myCallbackFunction'
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90 * ));
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91 * </code>
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92 *
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93 * @var callable $callback The option callback
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94 */
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95 public $callback;
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96
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97 /**
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98 * An associative array of additional params to pass to the class
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99 * corresponding to the action, this array will also be passed to the
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100 * callback defined for an action of type Callback, Example:
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101 *
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102 * <code>
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103 * // for a custom action
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104 * $parser->addOption('myoption', array(
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105 * 'short_name' => '-m',
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106 * 'long_name' => '--myoption',
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107 * 'action' => 'MyCustomAction',
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108 * 'action_params' => array('foo'=>true, 'bar'=>false)
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109 * ));
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110 *
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111 * // if the user type:
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112 * // $ <yourprogram> -m spam
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113 * // in your MyCustomAction class the execute() method will be called
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114 * // with the value 'spam' as first parameter and
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115 * // array('foo'=>true, 'bar'=>false) as second parameter
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116 * </code>
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117 *
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118 * @var array $action_params Additional parameters to pass to the action
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119 */
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120 public $action_params = array();
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121
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122 /**
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123 * For options that expect an argument, this property tells the parser if
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124 * the option argument is optional and can be ommited.
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125 *
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126 * @var bool $argumentOptional Whether the option arg is optional or not
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127 */
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128 public $argument_optional = false;
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129
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130 /**
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131 * For options that uses the "choice" property only.
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132 * Adds a --list-<choice> option to the parser that displays the list of
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133 * choices for the option.
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134 *
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135 * @var bool $add_list_option Whether to add a list option or not
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136 */
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137 public $add_list_option = false;
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138
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139 // }}}
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140 // Private properties {{{
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141
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142 /**
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143 * When an action is called remember it to allow for multiple calls.
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144 *
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145 * @var object $action_instance Placeholder for action
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146 */
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147 private $_action_instance = null;
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148
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149 // }}}
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150 // __construct() {{{
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151
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152 /**
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153 * Constructor.
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154 *
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155 * @param string $name The name of the option
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156 * @param array $params An optional array of parameters
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157 *
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158 * @return void
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159 */
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160 public function __construct($name = null, $params = array())
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161 {
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162 parent::__construct($name, $params);
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163 if ($this->action == 'Password') {
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164 // special case for Password action, password can be passed to the
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165 // commandline or prompted by the parser
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166 $this->argument_optional = true;
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167 }
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168 }
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169
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170 // }}}
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171 // toString() {{{
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172
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173 /**
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174 * Returns the string representation of the option.
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175 *
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176 * @param string $delim Delimiter to use between short and long option
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177 *
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178 * @return string The string representation of the option
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179 * @todo use __toString() instead
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180 */
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181 public function toString($delim = ", ")
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182 {
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183 $ret = '';
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184 $padding = '';
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185 if ($this->short_name != null) {
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186 $ret .= $this->short_name;
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187 if ($this->expectsArgument()) {
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188 $ret .= ' ' . $this->help_name;
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189 }
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190 $padding = $delim;
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191 }
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192 if ($this->long_name != null) {
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193 $ret .= $padding . $this->long_name;
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194 if ($this->expectsArgument()) {
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195 $ret .= '=' . $this->help_name;
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196 }
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197 }
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198 return $ret;
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199 }
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200
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201 // }}}
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202 // expectsArgument() {{{
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203
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204 /**
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205 * Returns true if the option requires one or more argument and false
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206 * otherwise.
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207 *
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208 * @return bool Whether the option expects an argument or not
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209 */
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210 public function expectsArgument()
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211 {
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212 if ($this->action == 'StoreTrue' || $this->action == 'StoreFalse' ||
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213 $this->action == 'Help' || $this->action == 'Version' ||
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214 $this->action == 'Counter' || $this->action == 'List') {
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215 return false;
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216 }
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217 return true;
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218 }
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219
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220 // }}}
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221 // dispatchAction() {{{
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222
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223 /**
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224 * Formats the value $value according to the action of the option and
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225 * updates the passed Console_CommandLine_Result object.
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226 *
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227 * @param mixed $value The value to format
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228 * @param Console_CommandLine_Result $result The result instance
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229 * @param Console_CommandLine $parser The parser instance
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230 *
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231 * @return void
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232 * @throws Console_CommandLine_Exception
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233 */
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234 public function dispatchAction($value, $result, $parser)
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235 {
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236 $actionInfo = Console_CommandLine::$actions[$this->action];
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237 if (true === $actionInfo[1]) {
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238 // we have a "builtin" action
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239 $tokens = explode('_', $actionInfo[0]);
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240 include_once implode('/', $tokens) . '.php';
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241 }
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242 $clsname = $actionInfo[0];
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243 if ($this->_action_instance === null) {
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244 $this->_action_instance = new $clsname($result, $this, $parser);
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245 }
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246
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247 // check value is in option choices
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248 if (!empty($this->choices) && !in_array($this->_action_instance->format($value), $this->choices)) {
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249 throw Console_CommandLine_Exception::factory(
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250 'OPTION_VALUE_NOT_VALID',
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251 array(
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252 'name' => $this->name,
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253 'choices' => implode('", "', $this->choices),
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254 'value' => $value,
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255 ),
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256 $parser,
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257 $this->messages
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258 );
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259 }
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260 $this->_action_instance->execute($value, $this->action_params);
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261 }
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262
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263 // }}}
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264 // validate() {{{
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265
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266 /**
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267 * Validates the option instance.
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268 *
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269 * @return void
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270 * @throws Console_CommandLine_Exception
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271 * @todo use exceptions instead
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272 */
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273 public function validate()
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274 {
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275 // check if the option name is valid
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276 if (!preg_match('/^[a-zA-Z_\x7f-\xff]+[a-zA-Z0-9_\x7f-\xff]*$/',
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277 $this->name)) {
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278 Console_CommandLine::triggerError('option_bad_name',
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279 E_USER_ERROR, array('{$name}' => $this->name));
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280 }
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281 // call the parent validate method
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282 parent::validate();
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283 // a short_name or a long_name must be provided
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284 if ($this->short_name == null && $this->long_name == null) {
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285 Console_CommandLine::triggerError('option_long_and_short_name_missing',
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286 E_USER_ERROR, array('{$name}' => $this->name));
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287 }
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288 // check if the option short_name is valid
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289 if ($this->short_name != null &&
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290 !(preg_match('/^\-[a-zA-Z]{1}$/', $this->short_name))) {
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291 Console_CommandLine::triggerError('option_bad_short_name',
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292 E_USER_ERROR, array(
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293 '{$name}' => $this->name,
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294 '{$short_name}' => $this->short_name
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295 ));
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296 }
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297 // check if the option long_name is valid
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298 if ($this->long_name != null &&
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299 !preg_match('/^\-\-[a-zA-Z]+[a-zA-Z0-9_\-]*$/', $this->long_name)) {
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300 Console_CommandLine::triggerError('option_bad_long_name',
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301 E_USER_ERROR, array(
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302 '{$name}' => $this->name,
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303 '{$long_name}' => $this->long_name
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304 ));
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305 }
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306 // check if we have a valid action
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307 if (!is_string($this->action)) {
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308 Console_CommandLine::triggerError('option_bad_action',
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309 E_USER_ERROR, array('{$name}' => $this->name));
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310 }
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311 if (!isset(Console_CommandLine::$actions[$this->action])) {
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312 Console_CommandLine::triggerError('option_unregistered_action',
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313 E_USER_ERROR, array(
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314 '{$action}' => $this->action,
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315 '{$name}' => $this->name
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316 ));
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317 }
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318 // if the action is a callback, check that we have a valid callback
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319 if ($this->action == 'Callback' && !is_callable($this->callback)) {
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320 Console_CommandLine::triggerError('option_invalid_callback',
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321 E_USER_ERROR, array('{$name}' => $this->name));
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322 }
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323 }
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324
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325 // }}}
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326 // setDefaults() {{{
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327
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328 /**
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329 * Set the default value according to the configured action.
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330 *
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331 * Note that for backward compatibility issues this method is only called
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332 * when the 'force_options_defaults' is set to true, it will become the
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333 * default behaviour in the next major release of Console_CommandLine.
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334 *
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335 * @return void
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336 */
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337 public function setDefaults()
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338 {
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339 if ($this->default !== null) {
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340 // already set
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341 return;
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342 }
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343 switch ($this->action) {
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344 case 'Counter':
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345 case 'StoreInt':
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346 $this->default = 0;
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347 break;
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348 case 'StoreFloat':
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349 $this->default = 0.0;
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350 break;
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351 case 'StoreArray':
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352 $this->default = array();
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353 break;
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354 case 'StoreTrue':
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355 $this->default = false;
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356 break;
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357 case 'StoreFalse':
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358 $this->default = true;
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359 break;
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360 default:
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361 return;
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362 }
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363 }
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364
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365 // }}}
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366 }
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