propellor/Propellor/Property/Cron.hs

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module Propellor.Property.Cron where
import Propellor
import qualified Propellor.Property.File as File
import qualified Propellor.Property.Apt as Apt
type CronTimes = String
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-- | Installs a cron job, run as a specificed user, in a particular
--directory. Note that the Desc must be unique, as it is used for the
--cron.d/ filename.
job :: Desc -> CronTimes -> UserName -> FilePath -> String -> Property
job desc times user cddir command = ("/etc/cron.d/" ++ desc) `File.hasContent`
[ "# Generated by propellor"
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, ""
, "SHELL=/bin/sh"
, "PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin"
, ""
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, times ++ "\t" ++ user ++ "\t" ++ "cd " ++ cddir ++ " && " ++ command
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]
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`requires` Apt.installed ["cron"]
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`requires` serviceRunning "cron"
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`describe` ("cronned " ++ desc)
-- | Installs a cron job, and runs it niced and ioniced.
niceJob :: Desc -> CronTimes -> UserName -> FilePath -> String -> Property
niceJob desc times user cddir command = job desc times user cddir
("nice ionice -c 3 " ++ command)
`requires` Apt.installed ["util-linux", "moreutils"]
-- | Installs a cron job to run propellor.
runPropellor :: CronTimes -> Property
runPropellor times = niceJob "propellor" times "root" localdir "chronic make"