Run config.hs from CLI

app/Main.hs

@@ -2,14 +2,15 @@ module Main where
 
 import Control.Exception (SomeException)
 import Control.Exception.Base (try)
+import Control.Monad (when)
 import GHC.IO.Exception (ExitCode (ExitSuccess))
 import Options.Applicative
 import System.Environment.XDG.BaseDir (getUserConfigDir, getUserDataDir)
 import System.FilePath ((</>))
 import System.Process (readProcessWithExitCode)
 
 data Args = Args
-  {sRecompile :: Bool}
+  {aRecompile :: Bool}
 
 args :: Parser Args
 args =
@@ -28,34 +29,52 @@ main = run =<< execParser opts
         (args <**> helper)
         (fullDesc <> progDesc "Shell prompt")
 
+appName :: String
+appName = "prompt"
+
 run :: Args -> IO ()
-run (Args True) = recompile
-run _ = return ()
+run args = do
+  when (aRecompile args) recompile
+
+  dataDir <- getUserDataDir ""
+  let binPath = dataDir </> appName
+
+  result <-
+    try
+      (readProcessWithExitCode binPath [] "") ::
+      IO (Either SomeException (ExitCode, String, String))
+
+  case result of
+    Left e -> print e
+    Right (exitCode, stdout, stderr) -> do
+      if exitCode == ExitSuccess
+        then putStrLn stdout
+        else putStrLn stderr
 
 recompile :: IO ()
-recompile =
-  let appName = "prompt"
-   in do
-        dataDir <- getUserDataDir ""
-        configDir <- getUserConfigDir ""
-
-        let binPath = dataDir </> appName
-
-        result <-
-          try
-            ( readProcessWithExitCode
-                "ghc"
-                [ "-o",
-                  binPath,
-                  configDir </> "prompt" </> "prompt.hs"
-                ]
-                ""
-            ) ::
-            IO (Either SomeException (ExitCode, String, String))
-
-        case result of
-          Left e -> print e
-          Right (exitCode, _, stderr) -> do
-            if exitCode == ExitSuccess
-              then return ()
-              else putStrLn stderr
+recompile = do
+  dataDir <- getUserDataDir ""
+  configDir <- getUserConfigDir ""
+
+  let binPath = dataDir </> appName
+
+  result <-
+    try
+      ( readProcessWithExitCode
+          "stack"
+          [ "ghc",
+            "--",
+            "-o",
+            binPath,
+            configDir </> "prompt" </> "config.hs"
+          ]
+          ""
+      ) ::
+      IO (Either SomeException (ExitCode, String, String))
+
+  case result of
+    Left e -> print e
+    Right (exitCode, _, stderr) -> do
+      if exitCode == ExitSuccess
+        then return ()
+        else putStrLn stderr

app/Prompt.hs

@@ -11,13 +11,6 @@ import System.Exit (ExitCode (ExitSuccess))
 import System.FilePath (takeFileName)
 import System.Process (readProcessWithExitCode)
 
-main :: IO ()
-main = do
-  run
-    [ currentDirectoryModule,
-      gitBranchModule
-    ]
-
 run :: [IO (Maybe String)] -> IO ()
 run modules = do
   results <- mapConcurrently id modules

prompt.cabal

@@ -20,7 +20,7 @@ executable prompt
         xdg-basedir >= 0.2,
         optparse-applicative >= 0.18
 
-library prompt-lib
+library
     exposed-modules:
         Prompt
     hs-source-dirs:   app