{-# LANGUAGE PackageImports #-}
{-# LANGUAGE DataKinds #-}
module Propellor.Engine (
mainProperties,
runPropellor,
ensureChildProperties,
fromHost,
fromHost',
onlyProcess,
chainPropellor,
runChainPropellor,
) where
import System.Exit
import System.IO
import Data.Monoid
import "mtl" Control.Monad.RWS.Strict
import System.Posix.Files
import System.Posix.IO
import System.FilePath
import System.Console.Concurrent
import Control.Applicative
import Control.Concurrent.Async
import Prelude
import Propellor.Types
import Propellor.Types.MetaTypes
import Propellor.Types.Core
import Propellor.Message
import Propellor.Exception
import Propellor.Info
import Utility.Exception
import Utility.Directory
import Utility.Process
import Utility.PartialPrelude
mainProperties :: Host -> IO ()
mainProperties :: Host -> IO ()
mainProperties Host
host = do
Result
ret <- Host -> Propellor Result -> IO Result
runPropellor Host
host forall a b. (a -> b) -> a -> b
$ [ChildProperty] -> Propellor Result
ensureChildProperties [forall p. IsProp p => p -> ChildProperty
toChildProperty Property (MetaTypes '[])
overall]
IO ()
messagesDone
case Result
ret of
Result
FailedChange -> forall a. ExitCode -> IO a
exitWith (Int -> ExitCode
ExitFailure Int
1)
Result
_ -> forall a. ExitCode -> IO a
exitWith ExitCode
ExitSuccess
where
overall :: Property (MetaTypes '[])
overall :: Property (MetaTypes '[])
overall = forall {k} (metatypes :: k).
SingI metatypes =>
[Char] -> Propellor Result -> Property (MetaTypes metatypes)
property [Char]
"overall" forall a b. (a -> b) -> a -> b
$
[ChildProperty] -> Propellor Result
ensureChildProperties (Host -> [ChildProperty]
hostProperties Host
host)
runPropellor :: Host -> Propellor Result -> IO Result
runPropellor :: Host -> Propellor Result -> IO Result
runPropellor Host
host Propellor Result
a = do
(Result
res, [EndAction]
endactions) <- forall (m :: * -> *) r w s a.
Monad m =>
RWST r w s m a -> r -> s -> m (a, w)
evalRWST (forall p. Propellor p -> RWST Host [EndAction] () IO p
runWithHost Propellor Result
a) Host
host ()
[Result]
endres <- forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM (Host -> Result -> EndAction -> IO Result
runEndAction Host
host Result
res) [EndAction]
endactions
forall (m :: * -> *) a. Monad m => a -> m a
return forall a b. (a -> b) -> a -> b
$ forall a. Monoid a => [a] -> a
mconcat (Result
resforall a. a -> [a] -> [a]
:[Result]
endres)
runEndAction :: Host -> Result -> EndAction -> IO Result
runEndAction :: Host -> Result -> EndAction -> IO Result
runEndAction Host
host Result
res (EndAction [Char]
desc Result -> Propellor Result
a) = forall (m :: * -> *) r.
(MonadIO m, MonadMask m, ActionResult r, ToResult r) =>
[Char] -> [Char] -> m r -> m r
actionMessageOn (Host -> [Char]
hostName Host
host) [Char]
desc forall a b. (a -> b) -> a -> b
$ do
(Result
ret, ()
_s, [EndAction]
_) <- forall r w s (m :: * -> *) a.
RWST r w s m a -> r -> s -> m (a, s, w)
runRWST (forall p. Propellor p -> RWST Host [EndAction] () IO p
runWithHost (forall (m :: * -> *).
(MonadIO m, MonadCatch m) =>
m Result -> m Result
catchPropellor (Result -> Propellor Result
a Result
res))) Host
host ()
forall (m :: * -> *) a. Monad m => a -> m a
return Result
ret
ensureChildProperties :: [ChildProperty] -> Propellor Result
ensureChildProperties :: [ChildProperty] -> Propellor Result
ensureChildProperties [ChildProperty]
ps = forall {p}. IsProp p => [p] -> Result -> Propellor Result
ensure [ChildProperty]
ps Result
NoChange
where
ensure :: [p] -> Result -> Propellor Result
ensure [] Result
rs = forall (m :: * -> *) a. Monad m => a -> m a
return Result
rs
ensure (p
p:[p]
ls) Result
rs = do
[Char]
hn <- forall r (m :: * -> *) a. MonadReader r m => (r -> a) -> m a
asks Host -> [Char]
hostName
Result
r <- forall b a. b -> (a -> b) -> Maybe a -> b
maybe (forall (f :: * -> *) a. Applicative f => a -> f a
pure Result
NoChange)
(forall (m :: * -> *) r.
(MonadIO m, MonadMask m, ActionResult r, ToResult r) =>
[Char] -> [Char] -> m r -> m r
actionMessageOn [Char]
hn (forall p. IsProp p => p -> [Char]
getDesc p
p) forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall (m :: * -> *).
(MonadIO m, MonadCatch m) =>
m Result -> m Result
catchPropellor)
(forall p. IsProp p => p -> Maybe (Propellor Result)
getSatisfy p
p)
[p] -> Result -> Propellor Result
ensure [p]
ls (Result
r forall a. Semigroup a => a -> a -> a
<> Result
rs)
fromHost :: [Host] -> HostName -> Propellor a -> Propellor (Maybe a)
fromHost :: forall a. [Host] -> [Char] -> Propellor a -> Propellor (Maybe a)
fromHost [Host]
l [Char]
hn Propellor a
getter = case [Host] -> [Char] -> Maybe Host
findHost [Host]
l [Char]
hn of
Maybe Host
Nothing -> forall (m :: * -> *) a. Monad m => a -> m a
return forall a. Maybe a
Nothing
Just Host
h -> forall a. a -> Maybe a
Just forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall a. Host -> Propellor a -> Propellor a
fromHost' Host
h Propellor a
getter
fromHost' :: Host -> Propellor a -> Propellor a
fromHost' :: forall a. Host -> Propellor a -> Propellor a
fromHost' Host
h Propellor a
getter = do
(a
ret, ()
_s, [EndAction]
runlog) <- forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO forall a b. (a -> b) -> a -> b
$ forall r w s (m :: * -> *) a.
RWST r w s m a -> r -> s -> m (a, s, w)
runRWST (forall p. Propellor p -> RWST Host [EndAction] () IO p
runWithHost Propellor a
getter) Host
h ()
forall w (m :: * -> *). MonadWriter w m => w -> m ()
tell [EndAction]
runlog
forall (m :: * -> *) a. Monad m => a -> m a
return a
ret
onlyProcess :: FilePath -> IO a -> IO a
onlyProcess :: forall a. [Char] -> IO a -> IO a
onlyProcess [Char]
lockfile IO a
a = forall (m :: * -> *) a c b.
MonadMask m =>
m a -> (a -> m c) -> (a -> m b) -> m b
bracket IO Fd
lock Fd -> IO ()
unlock (forall a b. a -> b -> a
const IO a
a)
where
lock :: IO Fd
lock = do
Bool -> [Char] -> IO ()
createDirectoryIfMissing Bool
True ([Char] -> [Char]
takeDirectory [Char]
lockfile)
Fd
l <- [Char] -> FileMode -> IO Fd
createFile [Char]
lockfile FileMode
stdFileMode
Fd -> FdOption -> Bool -> IO ()
setFdOption Fd
l FdOption
CloseOnExec Bool
True
Fd -> FileLock -> IO ()
setLock Fd
l (LockRequest
WriteLock, SeekMode
AbsoluteSeek, FileOffset
0, FileOffset
0)
forall (m :: * -> *) a.
MonadCatch m =>
m a -> (IOException -> m a) -> m a
`catchIO` forall a b. a -> b -> a
const forall {a}. a
alreadyrunning
forall (m :: * -> *) a. Monad m => a -> m a
return Fd
l
unlock :: Fd -> IO ()
unlock = Fd -> IO ()
closeFd
alreadyrunning :: a
alreadyrunning = forall a. [Char] -> a
giveup [Char]
"Propellor is already running on this host!"
chainPropellor :: CreateProcess -> IO Result
chainPropellor :: CreateProcess -> IO Result
chainPropellor CreateProcess
p =
forall a.
CreateProcessRunner
-> CreateProcess -> ((Handle, Handle) -> IO a) -> IO a
withOEHandles CreateProcessRunner
createProcessSuccess CreateProcess
p forall a b. (a -> b) -> a -> b
$ \(Handle
outh, Handle
errh) -> do
(Result
r, ()) <- Handle -> IO Result
processChainOutput Handle
outh
forall a b. IO a -> IO b -> IO (a, b)
`concurrently` Handle -> IO ()
forwardChainError Handle
errh
forall (m :: * -> *) a. Monad m => a -> m a
return Result
r
processChainOutput :: Handle -> IO Result
processChainOutput :: Handle -> IO Result
processChainOutput Handle
h = Maybe [Char] -> IO Result
go forall a. Maybe a
Nothing
where
go :: Maybe [Char] -> IO Result
go Maybe [Char]
lastline = do
Maybe [Char]
v <- forall (m :: * -> *) a. MonadCatch m => m a -> m (Maybe a)
catchMaybeIO (Handle -> IO [Char]
hGetLine Handle
h)
case Maybe [Char]
v of
Maybe [Char]
Nothing -> case Maybe [Char]
lastline of
Maybe [Char]
Nothing -> do
forall (m :: * -> *) a. Monad m => a -> m a
return Result
FailedChange
Just [Char]
l -> case forall a. Read a => [Char] -> Maybe a
readish [Char]
l of
Just Result
r -> forall (f :: * -> *) a. Applicative f => a -> f a
pure Result
r
Maybe Result
Nothing -> do
forall v. Outputable v => v -> IO ()
outputConcurrent ([Char]
l forall a. [a] -> [a] -> [a]
++ [Char]
"\n")
forall (m :: * -> *) a. Monad m => a -> m a
return Result
FailedChange
Just [Char]
s -> do
forall v. Outputable v => v -> IO ()
outputConcurrent forall a b. (a -> b) -> a -> b
$
forall b a. b -> (a -> b) -> Maybe a -> b
maybe [Char]
"" (\[Char]
l -> if forall (t :: * -> *) a. Foldable t => t a -> Bool
null [Char]
l then [Char]
"" else [Char]
l forall a. [a] -> [a] -> [a]
++ [Char]
"\n") Maybe [Char]
lastline
Maybe [Char] -> IO Result
go (forall a. a -> Maybe a
Just [Char]
s)
forwardChainError :: Handle -> IO ()
forwardChainError :: Handle -> IO ()
forwardChainError Handle
h = do
Maybe [Char]
v <- forall (m :: * -> *) a. MonadCatch m => m a -> m (Maybe a)
catchMaybeIO (Handle -> IO [Char]
hGetLine Handle
h)
case Maybe [Char]
v of
Maybe [Char]
Nothing -> forall (m :: * -> *) a. Monad m => a -> m a
return ()
Just [Char]
s -> do
forall v. Outputable v => v -> IO ()
errorConcurrent ([Char]
s forall a. [a] -> [a] -> [a]
++ [Char]
"\n")
Handle -> IO ()
forwardChainError Handle
h
runChainPropellor :: Host -> Propellor Result -> IO ()
runChainPropellor :: Host -> Propellor Result -> IO ()
runChainPropellor Host
h Propellor Result
a = do
Result
r <- Host -> Propellor Result -> IO Result
runPropellor Host
h Propellor Result
a
IO ()
flushConcurrentOutput
[Char] -> IO ()
putStrLn forall a b. (a -> b) -> a -> b
$ [Char]
"\n" forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> [Char]
show Result
r