ディレクトリ構成を変更

restructure.php

<?php
/**

Restructure dirs/files tree.

https://github.com/google/material-design-icons

Usage:

$ curl -LO https://github.com/google/material-design-icons/archive/master.zip
$ unzip material-design-icons-master.zip
$ ls
... material-design-icons-master ... 
$ php restructure.php
 
{category}/drawable-{dpi}/ic_{name}_{color}_{dip}.png
-> {category}/{name}/{color}/{dip}/drawable-{dpi}/ic_{name}.png


~/material-design-icons-master_new $ tree . 
.
├── action
│   ├── 3d_rotation
│   │   ├── black
│   │   │   ├── 18dp
│   │   │   │   ├── drawable-hdpi
│   │   │   │   │   └── ic_3d_rotation.png
│   │   │   │   ├── drawable-mdpi
│   │   │   │   │   └── ic_3d_rotation.png
│   │   │   │   ├── drawable-xhdpi
│   │   │   │   │   └── ic_3d_rotation.png
│   │   │   │   ├── drawable-xxhdpi
│   │   │   │   │   └── ic_3d_rotation.png
│   │   │   │   └── drawable-xxxhdpi
│   │   │   │       └── ic_3d_rotation.png
│   │   │   ├── 24dp
│   │   │   │   ├── drawable-hdpi
│   │   │   │   │   └── ic_3d_rotation.png
│   │   │   │   ├── drawable-mdpi
│   │   │   │   │   └── ic_3d_rotation.png
...
*/

foreach (glob('material-design-icons-master/*/*/*.png') as $file) {
  if (is_file($file) && preg_match('@/drawable@', $file)) {
    $path_parts = pathinfo($file);
    $filename = $path_parts['filename'];
    $dirs = explode('/', $path_parts['dirname']);
    $category   = $dirs[1];
    $dip        = substr($filename, strrpos($filename, '_') + 1);
    $dpi        = substr($dirs[2], strpos($dirs[2], '-') + 1);
    $filename   = substr($filename, 0, strpos($filename, '_' . $dip));
    $name_color = substr($filename, strpos($filename, '_') + 1);
    $color      = substr($name_color, strrpos($name_color, '_') + 1);
    $name       = substr($name_color, 0, strpos($name_color, '_' . $color));
    $path = sprintf('%s_new/%s/%s/%s/%s/drawable-%s/ic_%s.png',
                    $dirs[0], $category, $name, $color, $dip, $dpi, $name);
    mkdir(dirname($path), 0777, true);
    copy($file, $path);
    echo $file . "\n";
    echo '-> ' . $path . "\n";
  }
}