chainscript/src/utils/hashFiles.js

Client for chainscript.io

import path from 'path';
import objectPath from 'object-path';
import ignore from 'ignore';
import walkDir from './walkDir';
import hashFile from './hashFile';

const ignorer = ignore().addIgnoreFile(
  ignore.select(['.csignore', '.gitignore'])
);

function hashDir(cwd, dir, algorithm, hashes) {
  return walkDir(dir, files =>
    ignorer.filter(files.map(f => path.relative(cwd, f)))
  , file =>
    hashFile(file, algorithm)
      .then(hash => hashes[hash] = path.relative(cwd, file))
  );
}

export default function hashFiles(cwd, paths, algorithm = 'sha256', root = '') {
  const hashes = {};
  const dirs = [...paths];

  const next = () => {
    if (dirs.length === 0) {
      let json;

      if (root) {
        json = {};
        objectPath.set(json, root || '', hashes);
      } else {
        json = hashes;
      }

      return json;
    }

    return hashDir(cwd, dirs.shift(), algorithm, hashes).then(next);
  };

  return next();
}