<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Todaymade\Daux\Generator;
use InvalidArgumentException;
/**
* Getopt is a class to parse options for command-line
* applications.
*
* Terminology:
* Argument: an element of the argv array. This may be part of an option,
* or it may be a non-option command-line argument.
* Flag: the letter or word set off by a '-' or '--'. Example: in '--output filename',
* '--output' is the flag.
* Parameter: the additional argument that is associated with the option.
* Example: in '--output filename', the 'filename' is the parameter.
* Option: the combination of a flag and its parameter, if any.
* Example: in '--output filename', the whole thing is the option.
*
* The following features are supported:
*
* - Short flags like '-a'. Short flags are preceded by a single
* dash. Short flags may be clustered e.g. '-abc', which is the
* same as '-a' '-b' '-c'.
* - Long flags like '--verbose'. Long flags are preceded by a
* double dash. Long flags may not be clustered.
* - Options may have a parameter, e.g. '--output filename'.
* - Parameters for long flags may also be set off with an equals sign,
* e.g. '--output=filename'.
* - Parameters for long flags may be checked as string, word, or integer.
* - Automatic generation of a helpful usage message.
* - Signal end of options with '--'; subsequent arguments are treated
* as non-option arguments, even if they begin with '-'.
* - Raise exception Zend\Console\* in several cases
* when invalid flags or parameters are given. Usage message is
* returned in the exception object.
*
* The format for specifying options uses a PHP associative array.
* The key is has the format of a list of pipe-separated flag names,
* followed by an optional '=' to indicate a required parameter or
* '-' to indicate an optional parameter. Following that, the type
* of parameter may be specified as 's' for string, 'w' for word,
* or 'i' for integer.
*
* Examples:
* - 'user|username|u=s' this means '--user' or '--username' or '-u'
* are synonyms, and the option requires a string parameter.
* - 'p=i' this means '-p' requires an integer parameter. No synonyms.
* - 'verbose|v-i' this means '--verbose' or '-v' are synonyms, and
* they take an optional integer parameter.
* - 'help|h' this means '--help' or '-h' are synonyms, and
* they take no parameter.
*
* The values in the associative array are strings that are used as
* brief descriptions of the options when printing a usage message.
*
* The simpler format for specifying options used by PHP's getopt()
* function is also supported. This is similar to GNU getopt and shell
* getopt format.
*
* Example: 'abc:' means options '-a', '-b', and '-c'
* are legal, and the latter requires a string parameter.
*/
class Getopt
{
/**
* Constant tokens for various symbols used in the mode_zend
* rule format.
*/
const PARAM_REQUIRED = '=';
const PARAM_OPTIONAL = '-';
/**
* Stores the command-line arguments for the calling application.
*
* @var array
*/
protected $argv = array();
/**
* Stores the name of the calling application.
*
* @var string
*/
protected $progname = '';
/**
* Stores the list of legal options for this application.
*
* @var array
*/
protected $rules = array();
/**
* Stores alternate spellings of legal options.
*
* @var array
*/
protected $ruleMap = array();
/**
* Stores options given by the user in the current invocation
* of the application, as well as parameters given in options.
*
* @var array
*/
protected $options = array();
/**
* State of the options: parsed or not yet parsed?
*
* @var bool
*/
protected $parsed = false;
/**
* The constructor takes one to three parameters.
*
* The first parameter is $rules, which may be a string for
* gnu-style format, or a structured array for Zend-style format.
*
* @param array $rules
* @throws InvalidArgumentException
*/
public function __construct($rules, $argv = null)
{
$this->argv = $argv?: $_SERVER['argv'];
$this->progname = $this->argv[0];
$this->addRules($rules);
}
/**
* Return a list of options that have been seen in the current argv.
*
* @return array
*/
public function getOptions()
{
$this->parse();
return $this->options;
}
/**
* Return the state of the option seen on the command line of the
* current application invocation.
*
* This function returns true, or the parameter value to the option, if any.
* If the option was not given, this function returns false.
*
* @param string $flag
* @return mixed
*/
public function getOption($flag)
{
$this->parse();
$flag = strtolower($flag);
if (isset($this->ruleMap[$flag])) {
$flag = $this->ruleMap[$flag];
if (isset($this->options[$flag])) {
return $this->options[$flag];
}
}
return;
}
/**
* Return a useful option reference, formatted for display in an
* error message.
*
* Note that this usage information is provided in most Exceptions
* generated by this class.
*
* @return string
*/
public function getUsageMessage()
{
$usage = "Usage: {$this->progname} [ options ]\n";
$maxLen = 20;
$lines = array();
foreach ($this->rules as $rule) {
if (isset($rule['isFreeformFlag'])) {
continue;
}
$flags = array();
if (is_array($rule['alias'])) {
foreach ($rule['alias'] as $flag) {
$flags[] = (strlen($flag) == 1 ? '-' : '--') . $flag;
}
}
$linepart['name'] = implode('|', $flags);
if (isset($rule['param']) && $rule['param'] != 'none') {
$linepart['name'] .= '=""';
switch ($rule['param']) {
case 'optional':
$linepart['name'] .= " (optional)";
break;
case 'required':
$linepart['name'] .= " (required)";
break;
}
}
if (strlen($linepart['name']) > $maxLen) {
$maxLen = strlen($linepart['name']);
}
$linepart['help'] = '';
if (isset($rule['help'])) {
$linepart['help'] .= $rule['help'];
}
$lines[] = $linepart;
}
foreach ($lines as $linepart) {
$usage .= sprintf(
"%s %s\n",
str_pad($linepart['name'], $maxLen),
$linepart['help']
);
}
return $usage;
}
/**
* Parse command-line arguments and find both long and short
* options.
*
* Also find option parameters, and remaining arguments after
* all options have been parsed.
*
* @return self
*/
public function parse()
{
if ($this->parsed === true) {
return $this;
}
if (in_array('--help', $this->argv)) {
echo $this->getUsageMessage();
exit;
}
$this->options = array();
$long = [];
$short = '';
foreach ($this->rules as $rule) {
foreach($rule['alias'] as $alias) {
$prepared = $alias;
if ($rule['param'] == 'optional') {
$prepared .= '::';
} elseif ($rule['param'] == 'required') {
$prepared .= ':';
}
if (strlen($alias) == 1) {
$short .= $prepared;
} else {
$long[] = $prepared;
}
}
}
$result = getopt($short, $long);
foreach ($result as $key => $value) {
$this->options[$this->ruleMap[$key]] = $value;
}
$this->parsed = true;
return $this;
}
/**
* Define legal options using the Zend-style format.
*
* @param array $rules
* @throws InvalidArgumentException
*/
protected function addRules($rules)
{
foreach ($rules as $ruleCode => $helpMessage) {
// this may have to translate the long parm type if there
// are any complaints that =string will not work (even though that use
// case is not documented)
if (in_array(substr($ruleCode, -2, 1), array('-', '='))) {
$flagList = substr($ruleCode, 0, -2);
$delimiter = substr($ruleCode, -2, 1);
} else {
$flagList = $ruleCode;
$delimiter = $paramType = null;
}
$flagList = strtolower($flagList);
$flags = explode('|', $flagList);
$rule = array();
$mainFlag = $flags[0];
foreach ($flags as $flag) {
if (empty($flag)) {
throw new InvalidArgumentException("Blank flag not allowed in rule \"$ruleCode\".");
}
if (isset($this->ruleMap[$flag]) || (strlen($flag) != 1 && isset($this->rules[$flag]))) {
throw new InvalidArgumentException("Option \"-$flag\" is being defined more than once.");
}
$this->ruleMap[$flag] = $mainFlag;
$rule['alias'][] = $flag;
}
$rule['param'] = 'none';
if (isset($delimiter)) {
$rule['param'] = $delimiter == self::PARAM_REQUIRED? 'required' : 'optional';
}
$rule['help'] = $helpMessage;
$this->rules[$mainFlag] = $rule;
}
}
}