1 files changed, 55 insertions, 0 deletions
diff --git a/src/MdBlocks/CLI.hs b/src/MdBlocks/CLI.hs
new file mode 100644
index 0000000..96a3193
--- /dev/null
+++ b/src/MdBlocks/CLI.hs
@@ -0,0 +1,55 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module MdBlocks.CLI where
+
+import qualified Data.Aeson.Encode.Pretty as JSON
+import qualified Data.ByteString.Lazy.Char8 as BL
+
+import Options.Applicative
+
+import MdBlocks.Repository
+
+data Command
+  = List FilePath
+  | Extract String
+  | ShowMeta String
+
+runCLI :: IO ()
+runCLI =
+  execParser opts >>= run
+  where
+    opts = info parser mempty
+
+parser :: Parser Command
+parser =
+      listP
+  <|> extractP
+  <|> showP
+
+listP :: Parser Command
+listP =
+  List <$> strOption
+    (long "file")
+
+extractP :: Parser Command
+extractP =
+  Extract <$> strOption
+    (long "extract")
+
+showP :: Parser Command
+showP =
+  ShowMeta <$> strOption
+    (long "show")
+
+run :: Command -> IO ()
+
+run (List fp) = do
+  bs <- loadBlocks fp
+  BL.putStrLn $
+    JSON.encodePretty bs
+
+run (Extract addr) =
+  putStrLn ("extract not implemented yet: " ++ addr)
+
+run (ShowMeta addr) =
+  putStrLn ("show not implemented yet: " ++ addr)