Separate lib and exe; add languageDir setting

app/Main.hs

@@ -1,13 +1,10 @@
 module Main where
 
 import qualified Data.Text as T
+
 import Options.Applicative
 
-import Network.Wai.Handler.Warp (run)
-
-import Myriad.Core
-import Myriad.Docker
-import Myriad.Server
+import Myriad
 
 data Args = Args
     { configInput :: T.Text
@@ -26,10 +23,4 @@ parseArgs = execParser $ info (helper <*> args) (fullDesc <> progDesc "Run the M
 main :: IO ()
 main = do
     Args { configInput } <- parseArgs
-    env <- initEnv configInput
-    runMyriadT env do
-        buildAllImages
-        startCleanup
-        logInfo ["Finished Docker-related setup"]
-        logInfo ["Starting server"]
-    run (fromIntegral . port . config $ env) $ app env
+    runMyriadServer configInput

config.dhall

@@ -24,6 +24,7 @@ let Config : Type =
     , prepareContainers : Bool                -- Whether to setup all containers on startup
     , cleanupInterval   : Natural             -- The interval in minutes to kill containers periodically
     , port              : Natural             -- Port to run on
+    , languagesDir      : Text                -- Where the languages are stored
     }
 
 -- Write your config here!
@@ -35,5 +36,6 @@ let config : Config =
     , prepareContainers = False
     , cleanupInterval   = 30
     , port              = 8081
+    , languagesDir      = "./languages"
     }
 in config

package.yaml

@@ -20,12 +20,12 @@ dependencies:
 - bytestring
 - containers
 - dhall
+- filepath
 - lifted-base
 - lifted-async
 - monad-control
 - monad-logger
 - mtl
-- optparse-applicative
 - servant
 - servant-server
 - snowflake
@@ -66,11 +66,17 @@ default-extensions:
 - TypeFamilies
 - ViewPatterns
 
+library:
+  source-dirs: src
+
 executable:
   main: Main.hs
-  source-dirs: src
+  source-dirs: app
   ghc-options:
     - -threaded
     - -rtsopts
     - -with-rtsopts=-N
     - -Wall
+  dependencies:
+    - myriad
+    - optparse-applicative

src/Myriad.hs

@@ -0,0 +1,21 @@
+module Myriad
+    ( runMyriadServer
+    ) where
+
+import qualified Data.Text as T
+
+import Network.Wai.Handler.Warp (run)
+
+import Myriad.Core
+import Myriad.Docker
+import Myriad.Server
+
+runMyriadServer :: T.Text -> IO ()
+runMyriadServer configInput = do
+    env <- initEnv configInput
+    runMyriadT env do
+        buildAllImages
+        startCleanup
+        logInfo ["Finished Docker-related setup"]
+        logInfo ["Starting server"]
+    run (fromIntegral . port . config $ env) $ app env

src/Myriad/Core.hs

@@ -61,6 +61,7 @@ data MyriadConfig = MyriadConfig
     , prepareContainers :: Bool
     , cleanupInterval :: Natural
     , port :: Natural
+    , languagesDir :: T.Text
     } deriving (Show, Generic)
 
 instance Interpret MyriadConfig

src/Myriad/Docker.hs

@@ -20,17 +20,18 @@ import Control.Concurrent.Lifted (fork, threadDelay)
 import Control.Concurrent.MVar.Lifted
 import Control.Concurrent.QSem.Lifted
 import Control.Exception.Lifted
+import System.FilePath ((</>))
 import System.Process.Typed
 
 import Myriad.Core
 
 buildImage :: Myriadic m => LanguageConfig -> m ()
 buildImage lang@LanguageConfig { name, concurrent } = do
+    MyriadConfig { prepareContainers, languagesDir } <- asks config
     logInfo ["Building image ", cs $ imageName lang]
-    exec_ ["docker build -t ", imageName lang, " ./languages/", cs name]
+    exec_ ["docker build -t ", imageName lang, " ", cs languagesDir </> cs name]
     setupQSems
     logInfo ["Built image ", cs $ imageName lang]
-    MyriadConfig { prepareContainers } <- asks config
     when_ prepareContainers $ setupContainer lang
     where
         setupQSems :: Myriadic m => m ()