nyc merge fails on missing parent directory of output

[quasicomputational]

Link to bug demonstration repository.

https://github.com/quasicomputational/nyc-merge-missing-parent

Expected Behavior

nyc creates the directory and writes to the named file.

Observed Behavior

  thing
    ✓ is okay


  1 passing (7ms)

----------|----------|----------|----------|----------|-------------------|
File      |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
----------|----------|----------|----------|----------|-------------------|
All files |        0 |        0 |        0 |        0 |                   |
----------|----------|----------|----------|----------|-------------------|
failed access input directory non-existent-directory/mocha.json with error:

ENOENT: no such file or directory, stat 'non-existent-directory/mocha.json'

Forensic Information

Operating System: Debian.
Environment Information: https://gist.github.com/quasicomputational/e423212b707fa2232d04b8dd7578bbf9

[coreyfarrell]

FYI you're command-line is incorrect. The nyc merge command requires a positional argument <input-directory> before [output-file]. That said even using the correct arguments results in an exception if the destination is a file in a non-existent folder so I've posted a patch for that.