HaxeFoundation
old versions of libraries still exist after upgraded
While this might make sense, I don't think we should make this the default behaviour of the update command, because with haxelib one can use different versions for different compilations.
However, I often feel the need to remove outdated libs too. Let's make a new command for that, e.g. prune, that'll remove old versions of all or a given lib.
In addition we could add --prune/-p argument to the update command, though we don't really have any command-specific switches.
Meanwhile, there seems to be this tool just for that: http://lib.haxe.org/p/clearlibs/
clearlibs seems to remove anything but the latest version,
while prune should keep the set version and any version specified in another lib.
Some linux package manager have an autoremove command that remove packages installed as dependencies but not depended on anymore.
But that requires to track manual install vs dependency.
Another good solution would be to track which libraries are used through path (ie. -lib) but that's too expensive.
