How to compare keys in yaml files?

Question

There are two ruby on rails internationalization yaml files. One file is complete and another one is with missing keys. How can I compare two yaml files and see missing keys in

Answer 1

I couldn't find a fast tool to do that. I decided to write my own tool for this.

You can install it with cabal:

$ cabal update
$ cabal install yamlkeysdiff

Then you can diff two files this way:

$ yamlkeysdiff file1.yml file2.yml
> missing key in file2
< missing key in file1

You can also compare two subsets of the files:

$ yamlkeysdiff "file1.yml#key:subkey" "file2.yml#otherkey"

It behaves exactly like diff, you can do this:

$ yamlkeysdiff file1.yml file2.yml && echo Is the same || echo Is different