assets.config.js

const replaceToExtrudedTiles = list => {
  list.forEach(v => {
    v[1] = v[1].replace('map/tilesets', 'map/extruded_tilesets')
  })
}
module.exports = {
  patterns: [
    { type: 'image', prefix: '', dir: './img/sprites', rule: /^\w+\.png$/ },
    { type: 'image', prefix: 'item/', dir: './img/items', rule: /^\w+\.png$/ },
    { type: 'image', prefix: 'chara_sprite/', dir: './img/chara_sprites', rule: /^\w+\.png$/ },
    { type: 'image', prefix: 'tileset/', dir: './img/map/tilesets', rule: /^\w+\.png$/, callback: replaceToExtrudedTiles },
    { type: 'image', prefix: 'tileset/', dir: './img/map/images', rule: /^\w+\.png$/ },
    { type: 'tilemapTiledJSONExternal', prefix: '', dir: './map', rule: /^\w+\.json$/ },
    { type: 'audio', prefix: 'se/', dir: './audio/se', rule: /^\w+\.wav$/ },
    { type: 'audio', prefix: 'bgm/', dir: './audio/bgm', rule: /^\w+\.(m4a|ogg)$/ }
  ],
  documentRoot: './public',
  output: './src/assets.json'
}