hackage-meta: some scripts for filling out missing bounds

scripts/extract-build-deps.hs

@@ -0,0 +1,13 @@
+import Distribution.Verbosity
+import Distribution.PackageDescription.Parse (readPackageDescription)
+import Distribution.PackageDescription.Configuration (flattenPackageDescription)
+import Distribution.PackageDescription
+import Distribution.Package
+import Distribution.Text
+import Text.PrettyPrint
+import System.Environment
+
+main = do
+  [f] <- getArgs
+  pd <- flattenPackageDescription <$> readPackageDescription silent f
+  mapM_ putStrLn $ map (\(Dependency n v) -> unPackageName n ++ "\t" ++ render (disp v)) $ buildDepends pd