Allow setting dir and file permmissions, closes #18

[bobrik]

Disclaimer: I don't know ruby.

[untergeek]

I'm getting some conflicts with the test:

1) LogStash::Outputs::File receiving events output string format when using file and dir modes dirs and files are created with correct permissions
     Failure/Error: expect(File.stat(first_good_dir).mode.to_s(8)).to eq('100750')

       expected: "100750"
            got: "40750"

This may be because I'm testing on OS X, but that is an acceptable runtime environment.

[untergeek]

It's doing the same thing on my Ubuntu 14.04 box:

Failures:

  1) LogStash::Outputs::File receiving events output string format when using file and dir modes dirs and files are created with correct permissions
     Failure/Error: expect(File.stat(first_good_dir).mode.to_s(8)).to eq('100750')

       expected: "100750"
            got: "40750"

       (compared using ==)

[bobrik]

I'm on OS X as well:

$ stat -f %p README.md
100644

I'm thinking about dropping anything above the third octet in the test. What do you think?

[untergeek]

I think the umask should be limited to the last octet. If doing so, would you please change or add a few other tests to use atypical masks? 750 and 644 are common enough that they could generate a false positive.

[bobrik]

Updated with atypical mode.

[bobrik]

Also rebased and added changelog entry.

[untergeek]

Improving the documentation examples would be all that's left to make this right.

[bobrik]

Added backticks

[untergeek]

Excellent! Merging now.

[elasticsearch-bot]

Aaron Mildenstein merged this into the following branches!

Branch	Commits
master	bd860c2d6dca30dd747f1ea0e9b1b915eb57f6dc