Do we have to keep 6 different gradle versions in nixpkgks? It should be possible to remove some old versions.

@xeji It's a good question and a good point. I've taken a quick look and this is what I've done:

• I've bumped the "bugfix" versions of gradle_4_10 and gradle_3_5
• Instead of introducing gradle_5_0, I've bumped gradle_latest all the way from 5.0 to 5.3.1
• I've identified which nixpkgs are consuming the named gradle versions. Only gradle_2_14 and gradle_4_10 are unused by nixpkgs.
• gradle_2_5 is consumed by packages called jd-gui and mxisd. If these are updated, then I feel that it might be appropriate to remove both gradle_2_5 and gradle_2_14.

Thoughts?

Sounds good, thanks for looking into it. Let's see if the bumped versions build:
@GrahamcOfBorg build gradle gradle_3_5 gradle_4_10

@xeji I think I've fixed the issue with the linux build of gradle. Please try Ofborg again when you get a chance.

@GrahamcOfBorg build gradle gradle_3_5 gradle_4_10

Thank you. nix-review shows no issues, so this is good to go.