emscripten-wasm-loader/src/path/mkdirTree.ts

Common interface to load wasm module into isomorphic environment

import { FS } from '../BaseAsmModule';

/**
 * `mkdir -p` implementation for wasm FS.mkdir interface.
 * dirPath param should be unixified.
 */
const mkdirTree = (FS: FS, dirPath: string) => {
  const mkdir = (path: string) => {
    try {
      FS.mkdir(path);
    } catch (e) {
      //throw if not ERRNO_CODES.EEXIST
      if (e.errno != 17) {
        throw e;
      }
    }
  };

  dirPath
    .split('/')
    .filter(x => !!x)
    .reduce((acc: Array<string>, value: string) => {
      acc.push(`${acc.length > 0 ? acc[acc.length - 1] : ''}/${value}`);
      return acc;
    }, [])
    .forEach(mkdir);
};

export { mkdirTree };