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path: root/src/Propellor/Property/Group.hs
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module Propellor.Property.Group where

import Propellor

type GID = Int

exists :: GroupName -> Maybe GID -> Property
exists group' mgid = check test (cmdProperty "addgroup" $ args mgid)
	`describe` unwords ["group", group']
  where
	groupFile = "/etc/group"
	test = not <$> elem group' <$> words <$> readProcess "cut" ["-d:", "-f1", groupFile]
	args Nothing = [group']
	args (Just gid) = ["--gid", show gid, group']