added --allow-empty option to not raise an error on a missing file

[akatov]

useful if a file name depends on an environment variable:

fresh-options --file=~/.my-file --allow-empty
  fresh config/my-file/default
  fresh config/my-file/$PROFILE
fresh-options

[jasoncodes]

Thanks for your PR. I think --ignore-missing would be a better name than --allow-empty. The latter makes me think something to do with empty source files rather than the source file being missing.

This change needs test cases for both with and without --ref.

What is the intended behaviour when the only source is missing? Should an empty file be created or not? This should be covered in the tests.

[akatov]

yeah, i was thinking of the git commit --allow-empty option, but --ignore-missing definitely sounds better. I will take a look at the tests later.
I'd say the intended behaviour for the only source missing seems should be exactly what's happening now - the file is not created at all.

[akatov]

btw, ever thought of doing the tests in cucmber?

[jasoncodes]

Aruba looks interesting. Not really a fan of the verbosity of Cucumber though. Nor do I want a big (albeit development only) dependency.

[akatov]

seems to fail with --ref

[akatov]

works with --ref. test cases cover single files with --ref

[jasoncodes]

Looking pretty good. Thanks.

I noticed there’s an extra space inside the file existence checks. That’ll bug me if not removed.

Would you mind fixing the whitespace and then squashing these commits together?

[twe4ked]

Thanks for the PR.

[twe4ked]

I've added some documentation to the wiki here.