From 291bc460d522b2e2c785ec3c3b71a80f22b67853 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Sat, 3 Oct 2020 03:23:18 +0200
Subject: tv xmonad: read screen/font width from build env

---
 tv/5pkgs/haskell/xmonad-tv/src/THEnv/JSON.hs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 tv/5pkgs/haskell/xmonad-tv/src/THEnv/JSON.hs

(limited to 'tv/5pkgs/haskell/xmonad-tv/src/THEnv')

diff --git a/tv/5pkgs/haskell/xmonad-tv/src/THEnv/JSON.hs b/tv/5pkgs/haskell/xmonad-tv/src/THEnv/JSON.hs
new file mode 100644
index 000000000..2a3a0e523
--- /dev/null
+++ b/tv/5pkgs/haskell/xmonad-tv/src/THEnv/JSON.hs
@@ -0,0 +1,18 @@
+{-# LANGUAGE ScopedTypeVariables #-}
+
+module THEnv.JSON where
+
+import Data.Aeson (eitherDecode,FromJSON)
+import Data.ByteString.Lazy.Char8 (pack)
+import Language.Haskell.TH.Syntax (Exp,Lift(lift),Q)
+import THEnv (getCompileEnv)
+import Control.Monad
+
+getCompileEnvJSON :: (FromJSON a) => String -> Q a
+getCompileEnvJSON name =
+    either error (id :: a -> a) . eitherDecode . pack <$>  getCompileEnv name
+
+getCompileEnvJSONExp ::
+  forall proxy a. (FromJSON a, Lift a) => proxy a -> String -> Q Exp
+getCompileEnvJSONExp _ =
+    (lift :: a -> Q Exp) <=< getCompileEnvJSON
-- 
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