From f57e800a1d1a8e9f2bed34428f7f58a375f178fb Mon Sep 17 00:00:00 2001
From: Tom Smeding <tom@tomsmeding.com>
Date: Sun, 11 Jul 2021 17:56:34 +0200
Subject: WIP splitting of Target module and towards parallel builds

---
 Coolbal/Target/Class.hs | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 Coolbal/Target/Class.hs

(limited to 'Coolbal/Target/Class.hs')

diff --git a/Coolbal/Target/Class.hs b/Coolbal/Target/Class.hs
new file mode 100644
index 0000000..ea966d6
--- /dev/null
+++ b/Coolbal/Target/Class.hs
@@ -0,0 +1,47 @@
+module Coolbal.Target.Class where
+
+import Coolbal.Options (Flags)
+
+
+class IsTarget a where
+    -- | The name of the target.
+    targetName :: a -> String
+
+    -- | The cabal-style prefix indicating the kind of target (e.g. 'exe' for an executable target).
+    targetPrefix :: a -> String
+
+    -- | The name of the target, qualified with a cabal-style prefix indicating the kind of target.
+    targetNameQualified :: a -> String
+    targetNameQualified tg = buildQualifiedName (targetPrefix tg) (targetName tg)
+
+    -- | The name of the target, qualified with a cabal-style prefix indicating
+    -- the kind of target, except that the ':' is rendered as a '-'.
+    targetNameQualifiedFilename :: a -> FilePath
+    targetNameQualifiedFilename = qualifiedToQualifiedFilename . targetNameQualified
+
+    -- | Check whether the target must be recompiled due to changes on disk.
+    -- Argument is the root directory of the project.
+    targetCheckOld :: FilePath -> a -> IO Bool
+
+    -- | Recompile the target.
+    targetBuild :: Flags -> a -> IO ()
+
+    -- | If the target is an executable target, return an IO action that runs
+    -- the executable with the specified arguments. The 'FilePath' is the root
+    -- directory of the project.
+    targetExecute :: Flags -> a -> Maybe ([String] -> IO ())
+
+    -- | Remove the build artifacts for this target.
+    targetRemoveBuildArtifacts :: FilePath -> a -> IO ()
+
+data RestoreEnv = RestoreEnv
+    { reProjDir :: FilePath }
+
+qualifiedToQualifiedFilename :: String -> FilePath
+qualifiedToQualifiedFilename qual =
+    case break (== ':') qual of
+      (pre, ':' : post) -> pre ++ '-' : post
+      _ -> error "qualifiedToQualifiedFilename: unexpected form of targetNameQualified"
+
+buildQualifiedName :: String -> String -> String
+buildQualifiedName prefix name = prefix ++ ":" ++ name
-- 
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