Evan Prodromou
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extlib/Console/Getopt.php
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extlib/Console/Getopt.php
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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4: */
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// +----------------------------------------------------------------------+
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// | PHP Version 5 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2004 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 3.0 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available through the world-wide-web at the following url: |
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// | http://www.php.net/license/3_0.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Author: Andrei Zmievski <andrei@php.net> |
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// +----------------------------------------------------------------------+
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//
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// $Id: Getopt.php,v 1.4 2007/06/12 14:58:56 cellog Exp $
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require_once 'PEAR.php';
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/**
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* Command-line options parsing class.
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*
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* @author Andrei Zmievski <andrei@php.net>
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*
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*/
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class Console_Getopt {
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/**
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* Parses the command-line options.
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*
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* The first parameter to this function should be the list of command-line
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* arguments without the leading reference to the running program.
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*
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* The second parameter is a string of allowed short options. Each of the
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* option letters can be followed by a colon ':' to specify that the option
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* requires an argument, or a double colon '::' to specify that the option
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* takes an optional argument.
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*
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* The third argument is an optional array of allowed long options. The
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* leading '--' should not be included in the option name. Options that
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* require an argument should be followed by '=', and options that take an
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* option argument should be followed by '=='.
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*
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* The return value is an array of two elements: the list of parsed
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* options and the list of non-option command-line arguments. Each entry in
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* the list of parsed options is a pair of elements - the first one
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* specifies the option, and the second one specifies the option argument,
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* if there was one.
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*
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* Long and short options can be mixed.
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*
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* Most of the semantics of this function are based on GNU getopt_long().
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*
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* @param array $args an array of command-line arguments
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* @param string $short_options specifies the list of allowed short options
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* @param array $long_options specifies the list of allowed long options
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*
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* @return array two-element array containing the list of parsed options and
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* the non-option arguments
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*
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* @access public
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*
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*/
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function getopt2($args, $short_options, $long_options = null)
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{
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return Console_Getopt::doGetopt(2, $args, $short_options, $long_options);
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}
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/**
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* This function expects $args to start with the script name (POSIX-style).
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* Preserved for backwards compatibility.
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* @see getopt2()
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*/
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function getopt($args, $short_options, $long_options = null)
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{
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return Console_Getopt::doGetopt(1, $args, $short_options, $long_options);
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}
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/**
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* The actual implementation of the argument parsing code.
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*/
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function doGetopt($version, $args, $short_options, $long_options = null)
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{
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// in case you pass directly readPHPArgv() as the first arg
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if (PEAR::isError($args)) {
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return $args;
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}
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if (empty($args)) {
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return array(array(), array());
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}
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$opts = array();
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$non_opts = array();
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settype($args, 'array');
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if ($long_options) {
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sort($long_options);
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}
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/*
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* Preserve backwards compatibility with callers that relied on
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* erroneous POSIX fix.
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*/
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if ($version < 2) {
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if (isset($args[0]{0}) && $args[0]{0} != '-') {
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array_shift($args);
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}
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}
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reset($args);
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while (list($i, $arg) = each($args)) {
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/* The special element '--' means explicit end of
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options. Treat the rest of the arguments as non-options
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and end the loop. */
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if ($arg == '--') {
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$non_opts = array_merge($non_opts, array_slice($args, $i + 1));
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break;
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}
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if ($arg{0} != '-' || (strlen($arg) > 1 && $arg{1} == '-' && !$long_options)) {
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$non_opts = array_merge($non_opts, array_slice($args, $i));
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break;
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} elseif (strlen($arg) > 1 && $arg{1} == '-') {
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$error = Console_Getopt::_parseLongOption(substr($arg, 2), $long_options, $opts, $args);
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if (PEAR::isError($error))
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return $error;
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} elseif ($arg == '-') {
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// - is stdin
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$non_opts = array_merge($non_opts, array_slice($args, $i));
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break;
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} else {
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$error = Console_Getopt::_parseShortOption(substr($arg, 1), $short_options, $opts, $args);
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if (PEAR::isError($error))
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return $error;
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}
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}
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return array($opts, $non_opts);
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}
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/**
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* @access private
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*
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*/
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function _parseShortOption($arg, $short_options, &$opts, &$args)
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{
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for ($i = 0; $i < strlen($arg); $i++) {
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$opt = $arg{$i};
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$opt_arg = null;
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/* Try to find the short option in the specifier string. */
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if (($spec = strstr($short_options, $opt)) === false || $arg{$i} == ':')
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{
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return PEAR::raiseError("Console_Getopt: unrecognized option -- $opt");
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}
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if (strlen($spec) > 1 && $spec{1} == ':') {
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if (strlen($spec) > 2 && $spec{2} == ':') {
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if ($i + 1 < strlen($arg)) {
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/* Option takes an optional argument. Use the remainder of
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the arg string if there is anything left. */
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$opts[] = array($opt, substr($arg, $i + 1));
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break;
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}
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} else {
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/* Option requires an argument. Use the remainder of the arg
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string if there is anything left. */
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if ($i + 1 < strlen($arg)) {
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$opts[] = array($opt, substr($arg, $i + 1));
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break;
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} else if (list(, $opt_arg) = each($args)) {
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/* Else use the next argument. */;
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if (Console_Getopt::_isShortOpt($opt_arg) || Console_Getopt::_isLongOpt($opt_arg)) {
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return PEAR::raiseError("Console_Getopt: option requires an argument -- $opt");
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}
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} else {
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return PEAR::raiseError("Console_Getopt: option requires an argument -- $opt");
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}
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}
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}
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$opts[] = array($opt, $opt_arg);
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}
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}
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/**
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* @access private
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*
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*/
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function _isShortOpt($arg)
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{
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return strlen($arg) == 2 && $arg[0] == '-' && preg_match('/[a-zA-Z]/', $arg[1]);
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}
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/**
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* @access private
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*
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*/
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function _isLongOpt($arg)
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{
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return strlen($arg) > 2 && $arg[0] == '-' && $arg[1] == '-' &&
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preg_match('/[a-zA-Z]+$/', substr($arg, 2));
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}
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/**
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* @access private
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*
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*/
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function _parseLongOption($arg, $long_options, &$opts, &$args)
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{
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@list($opt, $opt_arg) = explode('=', $arg, 2);
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$opt_len = strlen($opt);
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for ($i = 0; $i < count($long_options); $i++) {
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$long_opt = $long_options[$i];
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$opt_start = substr($long_opt, 0, $opt_len);
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$long_opt_name = str_replace('=', '', $long_opt);
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/* Option doesn't match. Go on to the next one. */
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if ($long_opt_name != $opt) {
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continue;
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}
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$opt_rest = substr($long_opt, $opt_len);
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/* Check that the options uniquely matches one of the allowed
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options. */
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if ($i + 1 < count($long_options)) {
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$next_option_rest = substr($long_options[$i + 1], $opt_len);
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} else {
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$next_option_rest = '';
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}
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if ($opt_rest != '' && $opt{0} != '=' &&
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$i + 1 < count($long_options) &&
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$opt == substr($long_options[$i+1], 0, $opt_len) &&
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$next_option_rest != '' &&
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$next_option_rest{0} != '=') {
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return PEAR::raiseError("Console_Getopt: option --$opt is ambiguous");
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}
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if (substr($long_opt, -1) == '=') {
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if (substr($long_opt, -2) != '==') {
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/* Long option requires an argument.
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Take the next argument if one wasn't specified. */;
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if (!strlen($opt_arg) && !(list(, $opt_arg) = each($args))) {
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return PEAR::raiseError("Console_Getopt: option --$opt requires an argument");
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}
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if (Console_Getopt::_isShortOpt($opt_arg) || Console_Getopt::_isLongOpt($opt_arg)) {
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return PEAR::raiseError("Console_Getopt: option requires an argument --$opt");
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}
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}
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} else if ($opt_arg) {
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return PEAR::raiseError("Console_Getopt: option --$opt doesn't allow an argument");
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}
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$opts[] = array('--' . $opt, $opt_arg);
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return;
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}
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return PEAR::raiseError("Console_Getopt: unrecognized option --$opt");
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}
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/**
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* Safely read the $argv PHP array across different PHP configurations.
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* Will take care on register_globals and register_argc_argv ini directives
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*
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* @access public
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* @return mixed the $argv PHP array or PEAR error if not registered
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*/
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function readPHPArgv()
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{
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global $argv;
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if (!is_array($argv)) {
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if (!@is_array($_SERVER['argv'])) {
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if (!@is_array($GLOBALS['HTTP_SERVER_VARS']['argv'])) {
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return PEAR::raiseError("Console_Getopt: Could not read cmd args (register_argc_argv=Off?)");
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}
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return $GLOBALS['HTTP_SERVER_VARS']['argv'];
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}
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return $_SERVER['argv'];
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}
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return $argv;
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}
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}
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?>
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