gatsby/cache-dir/strip-prefix.js

/**
 * Remove a prefix from a string. Return the input string if the given prefix
 * isn't found.
 */

export default (str, prefix = ``) => {
  if (!prefix) {
    return str
  }

  prefix += `/`

  if (str.substr(0, prefix.length) === prefix) {
    return str.slice(prefix.length - 1)
  }

  return str
}