Feature request: Provide created path for fs.ensure*()

It would in some cases be useful to get feedback at which point an fs.ensure*() method did start to create a folder structure.

Two examples will probably clarify this best:

// Existing path: /my/example/path

// Example 1
fs.ensureDir('/my/example/path/with/some/additions', function (err, created) {
  assert(created === '/my/example/path/with')
})

// Example 2
fs.ensureDir('/my/example', function (err, created) {
  assert(created === null)
})

My concrete use case is that I have to run fs.ensureDir() with root privileges and then set the owner back to the user who ran the command.

[loilo]

Attached the PR. However I have to say one should be careful about merging it in. Now that the feature is documented, ensureFile, ensureLink and ensureSymlink would implicitely be expected to behave similarly (which they don’t).

Since they are all internally using mkdir though it would be maybe worth to think about adding that behaviour.

[jprichardson]

@Loilo - yep, please do!