Disp work gatherer

[arbulu89]

disp+work gatherer implementation. It runs the disp+work utility for each sidadm user, and parses the output.
By now, as requested, it only returns the kernel_release, compilation_mode and patch_number.
Everything is parsed using one regexp pattern. Adding new fields should be straightforward.

The fillRegexpGroups function is inspired in the regroup package: https://github.com/oriser/regroup#named-groups-map

I have created the internal dispWorkData struct. It is true that i could've simply use the map, without the json transformation, but I see that having the struct is more "strict" and informative

Output:

#{
  "NWP": #{
    "compilation_mode": "UNICODE",
    "kernel_release": "753",
    "patch_number": "900"
  }
} 

[CDimonaco]

For me the code looks good, I really like the named groups expansion

Just some comments to understand better the usecase

[CDimonaco]

What happens if we have no matches on the regexp, for example something could be missing or could be empty, we allow that?

[arbulu89]

In that cases the map is filled with empty strings. The FindAllStringSubmatch function returns a value, even an empty one for group, so combined with the SubexpNames you can fill all the groups, at least with empty values.
Actually, I added a test to cover that case XD

[CDimonaco]

We don't want to abort on something like that?

[arbulu89]

I thought about that, but the fact that we might have multiple sap installations doesn't make it a good idea in my opinion.
If you have NWP and NWD installed, and one fails, you at least have the result for the other (and the failed one filled with empty strings, that at the end, would make the rhai test fail

[rtorrero]

@arbulu89 LGTM, only thing I spotted is that you didn't add a test for the command-error case, should we add it?

[arbulu89]

@arbulu89 LGTM, only thing I spotted is that you didn't add a test for the command-error case, should we add it?

The Success test should cover this. There are 4 sap systems, and in the DEV one, that command fails, so all the fields are populdated with empty string values

[EMaksy]

Hey lgtm :D