Making it possible to return nested non existing directories with `rewrite` option

[joakimbeng]

Copying a complete directory including subdirectories does not work at the moment.

Example:

Directory structure:

/source/
└── src
    └── index.js

And a rewrite option like so:

var path = require('path');
var cp = require('copy');

cp.dir('/source', '/dest', {
  rewrite: function (f, d) {
    return path.resolve(d, path.relative(src, f));
  }
}, cb)

Will throw an ENOENT error for the /dest/src directory.

This PR addresses that by calling mkdirp for each file's destination folder, instead of only for the top most destination folder.

Note: I also think that a rewrite function like the one above would be a more logical default, instead of flattening like now, what do you think?

[jonschlinkert]

totally agree! I just mentioned something about that this week (e.g that I needed to go back to this and do a rename function instead of just flattening) crazy coincidence, thank you!

looking forward to reviewing and merging tomorrow!

[joakimbeng]

@jonschlinkert have you had any time looking at this?

[jonschlinkert]

not yet, I'll try today. Trying to get a deadline driven project completed. almost there!

[jonschlinkert]

sorry it's taking so long! This is on my priority list for today

[joakimbeng]

No worries! I know the feeling, take your time :)

[jonschlinkert]

latest is published to npm, thanks again, I really appreciate it!