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authorjeschli <jeschli@gmail.com>2018-12-16 20:28:28 +0100
committerjeschli <jeschli@gmail.com>2018-12-16 20:28:28 +0100
commit8605ac91ae3a3859ab906a5fa2e9b0e3dfcd6e1e (patch)
tree77618847347d2526897e94da744ab57588947567 /krebs/5pkgs/simple/cabal-read.nix
parent5030b74cc5c578bb82619a24592504a6008f1a10 (diff)
parent8705b4dbc8e8cf0c4e09c114daad3f96026520ab (diff)
Merge branch 'master' of prism.r:stockholm
Diffstat (limited to 'krebs/5pkgs/simple/cabal-read.nix')
-rw-r--r--krebs/5pkgs/simple/cabal-read.nix35
1 files changed, 35 insertions, 0 deletions
diff --git a/krebs/5pkgs/simple/cabal-read.nix b/krebs/5pkgs/simple/cabal-read.nix
new file mode 100644
index 000000000..f8fc71e05
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+++ b/krebs/5pkgs/simple/cabal-read.nix
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+{ writeHaskellPackage }:
+
+# Because `sed -n 's/.*\<ghc-options:\s\+\(.*\)/\1/p'` is too simple.
+writeHaskellPackage "cabal-read" {
+ executables.ghc-options = {
+ extra-depends = ["Cabal"];
+ text = /* haskell */ ''
+ module Main (main) where
+ import Data.List
+ import Data.Maybe
+ import Distribution.Compiler
+ import Distribution.PackageDescription.Parsec
+ import Distribution.Types.BuildInfo
+ import Distribution.Types.CondTree
+ import Distribution.Types.Executable
+ import Distribution.Types.GenericPackageDescription
+ import Distribution.Types.UnqualComponentName
+ import Distribution.Verbosity
+ import System.Environment
+ main :: IO ()
+ main = do
+ [path, name] <- getArgs
+
+ desc <- readGenericPackageDescription normal path
+
+ case lookup (mkUnqualComponentName name) (condExecutables desc) of
+ Just exe ->
+ putStrLn . intercalate " " . fromMaybe [] . lookup GHC
+ . options . buildInfo . condTreeData $ exe
+
+ Nothing ->
+ error ("executable " <> name <> " not found in " <> path)
+ '';
+ };
+}