async function getAssetData()

in packages/metro/src/Assets.js [185:226]

• 34 lines of code
• 7 McCabe index (conditional complexity)

async function getAssetData(
  assetPath: string,
  localPath: string,
  assetDataPlugins: $ReadOnlyArray<string>,
  platform: ?string = null,
  publicPath: string,
): Promise<AssetData> {
  // If the path of the asset is outside of the projectRoot, we don't want to
  // use `path.join` since this will generate an incorrect URL path. In that
  // case we just concatenate the publicPath with the relative path.
  let assetUrlPath = localPath.startsWith('..')
    ? publicPath.replace(/\/$/, '') + '/' + path.dirname(localPath)
    : path.join(publicPath, path.dirname(localPath));

  // On Windows, change backslashes to slashes to get proper URL path from file path.
  if (path.sep === '\\') {
    assetUrlPath = assetUrlPath.replace(/\\/g, '/');
  }

  const isImage = isAssetTypeAnImage(path.extname(assetPath).slice(1));
  const assetInfo = await getAbsoluteAssetInfo(assetPath, platform);

  const isImageInput = assetInfo.files[0].includes('.zip/')
    ? fs.readFileSync(assetInfo.files[0])
    : assetInfo.files[0];
  const dimensions = isImage ? imageSize(isImageInput) : null;
  const scale = assetInfo.scales[0];

  const assetData = {
    __packager_asset: true,
    fileSystemLocation: path.dirname(assetPath),
    httpServerLocation: assetUrlPath,
    width: dimensions ? dimensions.width / scale : undefined,
    height: dimensions ? dimensions.height / scale : undefined,
    scales: assetInfo.scales,
    files: assetInfo.files,
    hash: assetInfo.hash,
    name: assetInfo.name,
    type: assetInfo.type,
  };
  return await applyAssetDataPlugins(assetDataPlugins, assetData);
}