file system utils

fs-utils.js

// *******************
// Filesystem utils
// *****************
export const isDirectory = source => fs.lstatSync(source).isDirectory();
export const removePath = (source, filePaths = []) => filePaths.map(filePath => filePath.replace(source, ''));
export const listDirFiles = source => fs.readdirSync(source).map(name => path.join(source, name));
export const listFiles = source => listDirFiles(source).filter(source => !isDirectory(source));
export const listDirs = source => listDirFiles(source).filter(isDirectory);
export const removeExtension = fileName => fileName.split('.')[0];
export const getFileName = filePath => removeExtension(filePath.split('/').pop());

// Recursively creates nested directory structure from specified path
export function mkdirp(path) {
  path.split('/').slice(0, -1).reduce((prev, cur) => {
    const newPath = `${prev}/${cur}`;

    if (!fs.existsSync(newPath)) {
      fs.mkdirSync(newPath);
    }

    return newPath;
  });
}

export function writeFile(path, data) {
  try {
    console.log(`Writing file: ${path}`);

    mkdirp(path);

    fs.writeFileSync(path, JSON.stringify(data));
  } catch (err) {
    console.error(err);

    process.exit(1);
  }
}

export function readFile(path) {
  try {
    return fs.readFileSync(path, 'utf8');
  } catch (err) {
    console.error(err);

    process.exit(1);
  }
}

export function rmrf(dirPath) {
  if (fs.existsSync(dirPath)) {
    fs.readdirSync(dirPath).forEach((fileName) => {
      const filePath = path.join(dirPath, fileName);

      console.log(`Deleting ${filePath}`);

      if (isDirectory(filePath)) {
        rmrf(filePath);
      } else {
        fs.unlinkSync(filePath);
      }
    });

    console.log(`Deleting ${dirPath}`);

    fs.rmdirSync(dirPath);
  }
}

export const emptyDir = dirPath => rmrf(`${dirPath}/*`);

export const copyFiles = (inputPath, outputPath) => fs.readdirSync(inputPath)
  .forEach((fileName) => {
    const destination = `${outputPath}/${fileName}`;

    mkdirp(destination);

    const inStream = fs.createReadStream(`${inputPath}/${fileName}`);
    const outStream = fs.createWriteStream(destination);

    console.log(`Copying file ${fileName} from ${inputPath} to ${destination}`);

    inStream.pipe(outStream);
  });