Function isSrcSubdir

lib/internal/fs/cp/cp.js:189–193

(src, dest)

// Return true if dest is a subdir of src, otherwise false.
// It only checks the path strings.
function isSrcSubdir(src, dest) {
  const srcArr = normalizePathToArray(src);
  const destArr = normalizePathToArray(dest);
  return ArrayPrototypeEvery(srcArr, (cur, i) => destArr[i] === cur);
}

async function getStatsForCopy(destStat, src, dest, opts) {
  const statFn = opts.dereference ? stat : lstat;