Add a package.json, load generator info from it instead of from settings.yml

src/Package.hs

@@ -0,0 +1,21 @@
+{-# LANGUAGE TemplateHaskell #-}
+
+module Package ( Package(..)
+               , Repository(..)
+               , package
+               ) where
+
+import Data.Aeson ( eitherDecodeStrict )
+import Data.Either ( either )
+import Language.Haskell.TH.Syntax ( addDependentFile, lift, runIO )
+import Package.Types
+
+import qualified Data.ByteString as B
+
+package :: Package
+package = $(do
+    let f = "package.json"
+    addDependentFile f
+    json <- runIO $ B.readFile f
+    let result = eitherDecodeStrict json :: Either String Package
+    either fail lift result)