PhpBrew\Extension\ConfigureOption::setDefaultValue PHP Метод

    public function setDefaultValue($value)
    {
        $this->defaultValue = $value;
    }

    public static function createM4Extension($packageName, $m4Path)
    {
        if (!file_exists($m4Path)) {
            return NULL;
        }
        $m4 = file_get_contents($m4Path);
        // PHP_NEW_EXTENSION(extname, sources [, shared [, sapi_class [, extra-cflags [, cxx [, zend_ext]]]]])
        if (preg_match('/PHP_NEW_EXTENSION \\( \\s* 
                \\[?
                    (\\w+)   # The extension name
                \\]?

                \\s*,\\s*

                \\[?
                    ([^,]*)  # Source files
                \\]?

                (?:
                    \\s*,\\s* ([^,\\)]*)  # Ext Shared

                    (?:
                        \\s*,\\s* ([^,\\)]*)  # SAPI class

                        (?:
                            \\s*,\\s* ([^,\\)]*)  # Extra cflags

                            (?:
                                \\s*,\\s* ([^,\\)]*)  # CXX
                                \\s*,\\s* ([^,\\)]*)  # zend extension
                            )?
                        )?
                    )?
                )?
                /x', $m4, $matches)) {
            $fullmatched = array_shift($matches);
            $ext = new M4Extension($packageName);
            $ext->setExtensionName($matches[0]);
            $ext->setSharedLibraryName($matches[0] . '.so');
            if (isset($matches[6]) && strpos($matches[6], 'yes') !== false) {
                $ext->setZend(true);
            }
            $ext->setSourceDirectory(dirname($m4Path));
            /*
            PHP_ARG_ENABLE(calendar,whether to enable calendar conversion support,
            [  --enable-calendar       Enable support for calendar conversion])
            */
            if (preg_match_all('/
                PHP_ARG_ENABLE\\(
                    \\s*([^,]*)
                    (?:
                        \\s*,\\s*
                        (
                            [^,\\)]*
                        )
                        (?:
                            \\s*,\\s*
                            \\[ 
                                \\s* 
                                ([^\\s]+)
                                \\s+ 
                                ([^,\\)]*)
                                \\s* 
                            \\]
                        )?
                    )?/x', $m4, $allMatches)) {
                for ($i = 0; $i < count($allMatches[0]); $i++) {
                    $name = $allMatches[1][$i];
                    $desc = $allMatches[2][$i];
                    $option = $allMatches[3][$i];
                    $optionDesc = $allMatches[4][$i];
                    $ext->addConfigureOption(new ConfigureOption($option ?: '--enable-' . $name, $desc ?: $optionDesc));
                }
            }
            /*
            PHP_ARG_WITH(gd, for GD support,
            [  --with-gd[=DIR]   Include GD support.  DIR is the GD library base
                                    install directory [BUNDLED]])
            
            
            Possible option formats:
            
                --with-libxml-dir=DIR
                --with-recode[=DIR]
                --with-yaml[[=DIR]]
                --with-mysql-sock[=SOCKPATH]
            */
            if (preg_match_all('/
                PHP_ARG_WITH\\(
                    \\s*

                    ([^,]*)

                    (?:
                        \\s*,\\s*
                        \\[?
                            ([^,\\)]*)
                        \\]?

                        (?:
                            \\s*,\\s* 

                            \\[ 
                                \\s*

                                # simple match (\\S+)

                                ([a-zA-Z0-9-]+)  # option
                                (?:
                                    =?

                                    \\[?
                                        =?([^\\s\\]]*?) 
                                    \\]?
                                )?                 # option value hint

                                \\s+

                                ([^,\\)]*)        # option description
                                \\s*                 
                            \\]

                            (?:
                                \\s*,\\s* 
                                ([^,\\)]*)

                                (?:
                                    \\s*,\\s* 
                                    ([^,\\)]*)
                                )?
                            )?
                        )?
                    )?/x', $m4, $allMatches)) {
                // Parsing the M4 statement:
                //
                //   dnl PHP_ARG_WITH(arg-name, check message, help text[, default-val[, extension-or-not]])
                //
                for ($i = 0; $i < count($allMatches[0]); $i++) {
                    $name = $allMatches[1][$i];
                    $desc = $allMatches[2][$i];
                    $option = $allMatches[3][$i];
                    $optionValueHint = $allMatches[4][$i];
                    $optionDesc = $allMatches[5][$i];
                    $defaultValue = $allMatches[6][$i];
                    $opt = new ConfigureOption($option ?: '--with-' . $name, $desc ?: $optionDesc, $optionValueHint);
                    if ($defaultValue) {
                        $opt->setDefaultValue($opt);
                    }
                    $ext->addConfigureOption($opt);
                }
            }
            return $ext;
        } else {
            throw new Exception("Can not parse config.m4: {$m4Path}");
        }
    }