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<?php
/**
* ConsoleOptionParser file
*
* PHP 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @since CakePHP(tm) v 2.0
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
App::uses('TaskCollection', 'Console');
App::uses('ConsoleOutput', 'Console');
App::uses('ConsoleInput', 'Console');
App::uses('ConsoleInputSubcommand', 'Console');
App::uses('ConsoleInputOption', 'Console');
App::uses('ConsoleInputArgument', 'Console');
App::uses('ConsoleOptionParser', 'Console');
App::uses('HelpFormatter', 'Console');
/**
* Handles parsing the ARGV in the command line and provides support
* for GetOpt compatible option definition. Provides a builder pattern implementation
* for creating shell option parsers.
*
* ### Options
*
* Named arguments come in two forms, long and short. Long arguments are preceded
* by two - and give a more verbose option name. i.e. `--version`. Short arguments are
* preceded by one - and are only one character long. They usually match with a long option,
* and provide a more terse alternative.
*
* ### Using Options
*
* Options can be defined with both long and short forms. By using `$parser->addOption()`
* you can define new options. The name of the option is used as its long form, and you
* can supply an additional short form, with the `short` option. Short options should
* only be one letter long. Using more than one letter for a short option will raise an exception.
*
* Calling options can be done using syntax similar to most *nix command line tools. Long options
* cane either include an `=` or leave it out.
*
* `cake myshell command --connection default --name=something`
*
* Short options can be defined signally or in groups.
*
* `cake myshell command -cn`
*
* Short options can be combined into groups as seen above. Each letter in a group
* will be treated as a separate option. The previous example is equivalent to:
*
* `cake myshell command -c -n`
*
* Short options can also accept values:
*
* `cake myshell command -c default`
*
* ### Positional arguments
*
* If no positional arguments are defined, all of them will be parsed. If you define positional
* arguments any arguments greater than those defined will cause exceptions. Additionally you can
* declare arguments as optional, by setting the required param to false.
*
* `$parser->addArgument('model', array('required' => false));`
*
* ### Providing Help text
*
* By providing help text for your positional arguments and named arguments, the ConsoleOptionParser
* can generate a help display for you. You can view the help for shells by using the `--help` or `-h` switch.
*
* @package Cake.Console
*/
class ConsoleOptionParser {
/**
* Description text - displays before options when help is generated
*
* @see ConsoleOptionParser::description()
* @var string
*/
protected $_description = null;
/**
* Epilog text - displays after options when help is generated
*
* @see ConsoleOptionParser::epilog()
* @var string
*/
protected $_epilog = null;
/**
* Option definitions.
*
* @see ConsoleOptionParser::addOption()
* @var array
*/
protected $_options = array();
/**
* Map of short -> long options, generated when using addOption()
*
* @var string
*/
protected $_shortOptions = array();
/**
* Positional argument definitions.
*
* @see ConsoleOptionParser::addArgument()
* @var array
*/
protected $_args = array();
/**
* Subcommands for this Shell.
*
* @see ConsoleOptionParser::addSubcommand()
* @var array
*/
protected $_subcommands = array();
/**
* Command name.
*
* @var string
*/
protected $_command = '';
/**
* Construct an OptionParser so you can define its behavior
*
* @param string $command The command name this parser is for. The command name is used for generating help.
* @param boolean $defaultOptions Whether you want the verbose and quiet options set. Setting
* this to false will prevent the addition of `--verbose` & `--quiet` options.
*/
public function __construct($command = null, $defaultOptions = true) {
$this->command($command);
$this->addOption('help', array(
'short' => 'h',
'help' => __d('cake_console', 'Display this help.'),
'boolean' => true
));
if ($defaultOptions) {
$this->addOption('verbose', array(
'short' => 'v',
'help' => __d('cake_console', 'Enable verbose output.'),
'boolean' => true
))->addOption('quiet', array(
'short' => 'q',
'help' => __d('cake_console', 'Enable quiet output.'),
'boolean' => true
));
}
}
/**
* Static factory method for creating new OptionParsers so you can chain methods off of them.
*
* @param string $command The command name this parser is for. The command name is used for generating help.
* @param boolean $defaultOptions Whether you want the verbose and quiet options set.
* @return ConsoleOptionParser
*/
public static function create($command, $defaultOptions = true) {
return new ConsoleOptionParser($command, $defaultOptions);
}
/**
* Build a parser from an array. Uses an array like
*
* {{{
* $spec = array(
* 'description' => 'text',
* 'epilog' => 'text',
* 'arguments' => array(
* // list of arguments compatible with addArguments.
* ),
* 'options' => array(
* // list of options compatible with addOptions
* ),
* 'subcommands' => array(
* // list of subcommands to add.
* )
* );
* }}}
*
* @param array $spec The spec to build the OptionParser with.
* @return ConsoleOptionParser
*/
public static function buildFromArray($spec) {
$parser = new ConsoleOptionParser($spec['command']);
if (!empty($spec['arguments'])) {
$parser->addArguments($spec['arguments']);
}
if (!empty($spec['options'])) {
$parser->addOptions($spec['options']);
}
if (!empty($spec['subcommands'])) {
$parser->addSubcommands($spec['subcommands']);
}
if (!empty($spec['description'])) {
$parser->description($spec['description']);
}
if (!empty($spec['epilog'])) {
$parser->epilog($spec['epilog']);
}
return $parser;
}
/**
* Get or set the command name for shell/task.
*
* @param string $text The text to set, or null if you want to read
* @return mixed If reading, the value of the command. If setting $this will be returned
*/
public function command($text = null) {
if ($text !== null) {
$this->_command = Inflector::underscore($text);
return $this;
}
return $this->_command;
}
/**
* Get or set the description text for shell/task.
*
* @param string|array $text The text to set, or null if you want to read. If an array the
* text will be imploded with "\n"
* @return mixed If reading, the value of the description. If setting $this will be returned
*/
public function description($text = null) {
if ($text !== null) {
if (is_array($text)) {
$text = implode("\n", $text);
}
$this->_description = $text;
return $this;
}
return $this->_description;
}
/**
* Get or set an epilog to the parser. The epilog is added to the end of
* the options and arguments listing when help is generated.
*
* @param string|array $text Text when setting or null when reading. If an array the text will be imploded with "\n"
* @return mixed If reading, the value of the epilog. If setting $this will be returned.
*/
public function epilog($text = null) {
if ($text !== null) {
if (is_array($text)) {
$text = implode("\n", $text);
}
$this->_epilog = $text;
return $this;
}
return $this->_epilog;
}
/**
* Add an option to the option parser. Options allow you to define optional or required
* parameters for your console application. Options are defined by the parameters they use.
*
* ### Options
*
* - `short` - The single letter variant for this option, leave undefined for none.
* - `help` - Help text for this option. Used when generating help for the option.
* - `default` - The default value for this option. Defaults are added into the parsed params when the
* attached option is not provided or has no value. Using default and boolean together will not work.
* are added into the parsed parameters when the option is undefined. Defaults to null.
* - `boolean` - The option uses no value, its just a boolean switch. Defaults to false.
* If an option is defined as boolean, it will always be added to the parsed params. If no present
* it will be false, if present it will be true.
* - `choices` A list of valid choices for this option. If left empty all values are valid..
* An exception will be raised when parse() encounters an invalid value.
*
* @param ConsoleInputOption|string $name The long name you want to the value to be parsed out as when options are parsed.
* Will also accept an instance of ConsoleInputOption
* @param array $options An array of parameters that define the behavior of the option
* @return ConsoleOptionParser $this.
*/
public function addOption($name, $options = array()) {
if (is_object($name) && $name instanceof ConsoleInputOption) {
$option = $name;
$name = $option->name();
} else {
$defaults = array(
'name' => $name,
'short' => null,
'help' => '',
'default' => null,
'boolean' => false,
'choices' => array()
);
$options = array_merge($defaults, $options);
$option = new ConsoleInputOption($options);
}
$this->_options[$name] = $option;
if ($option->short() !== null) {
$this->_shortOptions[$option->short()] = $name;
}
return $this;
}
/**
* Add a positional argument to the option parser.
*
* ### Params
*
* - `help` The help text to display for this argument.
* - `required` Whether this parameter is required.
* - `index` The index for the arg, if left undefined the argument will be put
* onto the end of the arguments. If you define the same index twice the first
* option will be overwritten.
* - `choices` A list of valid choices for this argument. If left empty all values are valid..
* An exception will be raised when parse() encounters an invalid value.
*
* @param ConsoleInputArgument|string $name The name of the argument. Will also accept an instance of ConsoleInputArgument
* @param array $params Parameters for the argument, see above.
* @return ConsoleOptionParser $this.
*/
public function addArgument($name, $params = array()) {
if (is_object($name) && $name instanceof ConsoleInputArgument) {
$arg = $name;
$index = count($this->_args);
} else {
$defaults = array(
'name' => $name,
'help' => '',
'index' => count($this->_args),
'required' => false,
'choices' => array()
);
$options = array_merge($defaults, $params);
$index = $options['index'];
unset($options['index']);
$arg = new ConsoleInputArgument($options);
}
$this->_args[$index] = $arg;
ksort($this->_args);
return $this;
}
/**
* Add multiple arguments at once. Take an array of argument definitions.
* The keys are used as the argument names, and the values as params for the argument.
*
* @param array $args Array of arguments to add.
* @see ConsoleOptionParser::addArgument()
* @return ConsoleOptionParser $this
*/
public function addArguments(array $args) {
foreach ($args as $name => $params) {
$this->addArgument($name, $params);
}
return $this;
}
/**
* Add multiple options at once. Takes an array of option definitions.
* The keys are used as option names, and the values as params for the option.
*
* @param array $options Array of options to add.
* @see ConsoleOptionParser::addOption()
* @return ConsoleOptionParser $this
*/
public function addOptions(array $options) {
foreach ($options as $name => $params) {
$this->addOption($name, $params);
}
return $this;
}
/**
* Append a subcommand to the subcommand list.
* Subcommands are usually methods on your Shell, but can also be used to document Tasks.
*
* ### Options
*
* - `help` - Help text for the subcommand.
* - `parser` - A ConsoleOptionParser for the subcommand. This allows you to create method
* specific option parsers. When help is generated for a subcommand, if a parser is present
* it will be used.
*
* @param ConsoleInputSubcommand|string $name Name of the subcommand. Will also accept an instance of ConsoleInputSubcommand
* @param array $options Array of params, see above.
* @return ConsoleOptionParser $this.
*/
public function addSubcommand($name, $options = array()) {
if (is_object($name) && $name instanceof ConsoleInputSubcommand) {
$command = $name;
$name = $command->name();
} else {
$defaults = array(
'name' => $name,
'help' => '',
'parser' => null
);
$options = array_merge($defaults, $options);
$command = new ConsoleInputSubcommand($options);
}
$this->_subcommands[$name] = $command;
return $this;
}
/**
* Add multiple subcommands at once.
*
* @param array $commands Array of subcommands.
* @return ConsoleOptionParser $this
*/
public function addSubcommands(array $commands) {
foreach ($commands as $name => $params) {
$this->addSubcommand($name, $params);
}
return $this;
}
/**
* Gets the arguments defined in the parser.
*
* @return array Array of argument descriptions
*/
public function arguments() {
return $this->_args;
}
/**
* Get the defined options in the parser.
*
* @return array
*/
public function options() {
return $this->_options;
}
/**
* Get the array of defined subcommands
*
* @return array
*/
public function subcommands() {
return $this->_subcommands;
}
/**
* Parse the argv array into a set of params and args. If $command is not null
* and $command is equal to a subcommand that has a parser, that parser will be used
* to parse the $argv
*
* @param array $argv Array of args (argv) to parse.
* @param string $command The subcommand to use. If this parameter is a subcommand, that has a parser,
* That parser will be used to parse $argv instead.
* @return Array array($params, $args)
* @throws ConsoleException When an invalid parameter is encountered.
*/
public function parse($argv, $command = null) {
if (isset($this->_subcommands[$command]) && $this->_subcommands[$command]->parser()) {
return $this->_subcommands[$command]->parser()->parse($argv);
}
$params = $args = array();
$this->_tokens = $argv;
while (($token = array_shift($this->_tokens)) !== null) {
if (substr($token, 0, 2) == '--') {
$params = $this->_parseLongOption($token, $params);
} elseif (substr($token, 0, 1) == '-') {
$params = $this->_parseShortOption($token, $params);
} else {
$args = $this->_parseArg($token, $args);
}
}
foreach ($this->_args as $i => $arg) {
if ($arg->isRequired() && !isset($args[$i]) && empty($params['help'])) {
throw new ConsoleException(
__d('cake_console', 'Missing required arguments. %s is required.', $arg->name())
);
}
}
foreach ($this->_options as $option) {
$name = $option->name();
$isBoolean = $option->isBoolean();
$default = $option->defaultValue();
if ($default !== null && !isset($params[$name]) && !$isBoolean) {
$params[$name] = $default;
}
if ($isBoolean && !isset($params[$name])) {
$params[$name] = false;
}
}
return array($params, $args);
}
/**
* Gets formatted help for this parser object.
* Generates help text based on the description, options, arguments, subcommands and epilog
* in the parser.
*
* @param string $subcommand If present and a valid subcommand that has a linked parser.
* That subcommands help will be shown instead.
* @param string $format Define the output format, can be text or xml
* @param integer $width The width to format user content to. Defaults to 72
* @return string Generated help.
*/
public function help($subcommand = null, $format = 'text', $width = 72) {
if (
isset($this->_subcommands[$subcommand]) &&
$this->_subcommands[$subcommand]->parser() instanceof self
) {
$subparser = $this->_subcommands[$subcommand]->parser();
$subparser->command($this->command() . ' ' . $subparser->command());
return $subparser->help(null, $format, $width);
}
$formatter = new HelpFormatter($this);
if ($format == 'text' || $format === true) {
return $formatter->text($width);
} elseif ($format == 'xml') {
return $formatter->xml();
}
}
/**
* Parse the value for a long option out of $this->_tokens. Will handle
* options with an `=` in them.
*
* @param string $option The option to parse.
* @param array $params The params to append the parsed value into
* @return array Params with $option added in.
*/
protected function _parseLongOption($option, $params) {
$name = substr($option, 2);
if (strpos($name, '=') !== false) {
list($name, $value) = explode('=', $name, 2);
array_unshift($this->_tokens, $value);
}
return $this->_parseOption($name, $params);
}
/**
* Parse the value for a short option out of $this->_tokens
* If the $option is a combination of multiple shortcuts like -otf
* they will be shifted onto the token stack and parsed individually.
*
* @param string $option The option to parse.
* @param array $params The params to append the parsed value into
* @return array Params with $option added in.
* @throws ConsoleException When unknown short options are encountered.
*/
protected function _parseShortOption($option, $params) {
$key = substr($option, 1);
if (strlen($key) > 1) {
$flags = str_split($key);
$key = $flags[0];
for ($i = 1, $len = count($flags); $i < $len; $i++) {
array_unshift($this->_tokens, '-' . $flags[$i]);
}
}
if (!isset($this->_shortOptions[$key])) {
throw new ConsoleException(__d('cake_console', 'Unknown short option `%s`', $key));
}
$name = $this->_shortOptions[$key];
return $this->_parseOption($name, $params);
}
/**
* Parse an option by its name index.
*
* @param string $name The name to parse.
* @param array $params The params to append the parsed value into
* @return array Params with $option added in.
* @throws ConsoleException
*/
protected function _parseOption($name, $params) {
if (!isset($this->_options[$name])) {
throw new ConsoleException(__d('cake_console', 'Unknown option `%s`', $name));
}
$option = $this->_options[$name];
$isBoolean = $option->isBoolean();
$nextValue = $this->_nextToken();
if (!$isBoolean && !empty($nextValue) && !$this->_optionExists($nextValue)) {
array_shift($this->_tokens);
$value = $nextValue;
} elseif ($isBoolean) {
$value = true;
} else {
$value = $option->defaultValue();
}
if ($option->validChoice($value)) {
$params[$name] = $value;
return $params;
}
}
/**
* Check to see if $name has an option (short/long) defined for it.
*
* @param string $name The name of the option.
* @return boolean
*/
protected function _optionExists($name) {
if (substr($name, 0, 2) === '--') {
return isset($this->_options[substr($name, 2)]);
}
if ($name{0} === '-' && $name{1} !== '-') {
return isset($this->_shortOptions[$name{1}]);
}
return false;
}
/**
* Parse an argument, and ensure that the argument doesn't exceed the number of arguments
* and that the argument is a valid choice.
*
* @param string $argument The argument to append
* @param array $args The array of parsed args to append to.
* @return array Args
* @throws ConsoleException
*/
protected function _parseArg($argument, $args) {
if (empty($this->_args)) {
array_push($args, $argument);
return $args;
}
$next = count($args);
if (!isset($this->_args[$next])) {
throw new ConsoleException(__d('cake_console', 'Too many arguments.'));
}
if ($this->_args[$next]->validChoice($argument)) {
array_push($args, $argument);
return $args;
}
}
/**
* Find the next token in the argv set.
*
* @return string next token or ''
*/
protected function _nextToken() {
return isset($this->_tokens[0]) ? $this->_tokens[0] : '';
}
}
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