Add first user into wheel group

[mchf]

Problem

First user is requested to be the member of the wheel group

Solution

Users service adds the first user into wheel group on creation

[imobachgs]

Perhaps we do not need an additional command (we might need to check whether the result is the same by adding just the --groups switch to useradd).

[imobachgs]

why

those

empty

lines? ;-)

[mchf]

well just my way of formatting .. kind of separates things into logical blocks

[imobachgs]

This is a good idea. Thinking about it, and having into account that there is some repetitive code when running the commands, perhaps we could even think about having our own struct.

Something like:

struct ChrootedCommand(Command);

And you could do:

ChrootedCommand::on("/mnt")
  .command("adduser")
  .arg("blah")
  .output()?; // we could even have a more convenient way of running it if we want to

It is just an idea. WDYT? We could even reuse it in other parts of Agama.