GreenCape/phing-tasks

<?php

namespace GreenCape\PhingTasks;

class HelpTask extends \Task
{
    private $verbose = false;

    /**
     * @param boolean $verbose
     */
    public function setVerbose($verbose)
    {
        $this->verbose = $verbose;
    }

    public function main()
    {
        $fmt     = "  %-22s %s\n";

        `phing -h`;
        echo "\nTargets:\n";

        $vars = array();
        $properties = $this->getProject()->getProperties();
        foreach ($properties as $key => $value)
        {
            if (preg_match('~^phing.file~', $key))
            {
                $vars[$key] = $value;
            }
        }
        $vars = array_unique($vars);

        $targets = array();
        foreach ($vars as $file)
        {
            $targets += $this->parse($file);
        }
        ksort($targets);

        foreach ($targets as $target)
        {
            $source = 'defined in ' . str_replace($properties['phing.dir'] . '/', '', $target['source']);

            if (empty($target['description']))
            {
                $target['description'] = '';
            }
            if (isset($target['hidden']) && $target['hidden'] == 'true')
            {
                $target['description'] = trim($target['description'] . ' (hidden)');
            }
            printf($fmt, $target['name'], $target['description']);

            if (!empty($target['depends']))
            {
                $deps = array_values(array_intersect(array_keys($targets), preg_split('~\s*,\s*~', $target['depends'])));

                if (count($deps) == 0)
                {
                    $deps = 'only hidden targets';
                }
                elseif (count($deps) == 1)
                {
                    $deps = $deps[0];
                }
                elseif (count($deps) == 2)
                {
                    $deps = implode(' and ', $deps);
                }
                else
                {
                    $deps[count($deps) - 1] = 'and ' . $deps[count($deps) - 1];
                    $deps                   = implode(', ', $deps);
                }
                printf($fmt, '', 'Uses ' . $deps . '; ' . $source);
            }
            else
            {
                printf($fmt, '', ucfirst($source));
            }
        }
    }

    private function parse($file)
    {
        $xml     = file_get_contents($file);
        $targets = array();
        preg_match_all('~<target\s+(.*?)/?>~sim', $xml, $matches, PREG_SET_ORDER);
        foreach ($matches as $match)
        {
            $attributes = $this->parseAttributes($match[1]);
            if ($this->verbose || empty($attributes['hidden']) || $attributes['hidden'] == 'false')
            {
                $attributes['source']         = $file;
                $targets[$attributes['name']] = $attributes;
            }
        }

        return $targets;
    }

    private function parseAttributes($attr)
    {
        $attributes = array();
        preg_match_all('~\b(\w+)=(["\'])(.*?)\2~', $attr, $matches, PREG_SET_ORDER);
        foreach ($matches as $match)
        {
            $attributes[$match[1]] = $match[3];
        }

        return $attributes;
    }
}