src/CommandLine.hs: remove redundant Typeable derivation.

[email-validator.git] / src / CommandLine.hs

diff --git a/src/CommandLine.hs b/src/CommandLine.hs
index 405ded8ef9597cb181e986b4d31240a6594a9e9e..787cc1992f3d0a1c8099a8048d833396698e76af 100644 (file)
--- a/src/CommandLine.hs
+++ b/src/CommandLine.hs
@@ -1,19 +1,26 @@
 {-# LANGUAGE DeriveDataTypeable #-}
 
-module CommandLine
+module CommandLine (
+  Args(..),
+  get_args )
 where
 
-import System.Console.CmdArgs
-import System.Console.CmdArgs.Explicit (process)
-import System.Environment (getArgs, withArgs)
-import System.Exit (ExitCode(..), exitWith)
-import System.IO (hPutStrLn, stderr)
+import System.Console.CmdArgs (
+  Data,
+  (&=),
+  cmdArgs,
+  def,
+  details,
+  help,
+  program,
+  summary,
+  typFile )
+
 
 -- Get the version from Cabal.
-import Paths_email_validator (version)
-import Data.Version (showVersion)
+import Paths_email_validator ( version )
+import Data.Version ( showVersion )
 
-import ExitCodes
 
 -- We optionally accept input/output files to use instead of
 -- stdin/stdout.
@@ -21,7 +28,7 @@ data Args = Args { accept_a :: Bool,
                    input_file :: Maybe FilePath,
                    output_file :: Maybe FilePath,
                    rfc5322 :: Bool }
-  deriving   (Show, Data, Typeable)
+  deriving   (Show, Data)
 
 description :: String
 description = "Perform naive validation of email addresses."
@@ -48,9 +55,8 @@ rfc5322_help :: String
 rfc5322_help =
   "Validate according to RFC 5322 (incredibly lenient)."
 
-arg_spec :: Mode (CmdArgs Args)
+arg_spec :: Args
 arg_spec =
-  cmdArgsMode $
     Args { accept_a    = def &=            help accept_a_help,
            input_file  = def &= typFile &= help input_file_help,
            output_file = def &= typFile &= help output_file_help,
@@ -59,26 +65,7 @@ arg_spec =
       &= summary my_summary
       &= details [description]
 
-show_help :: IO (CmdArgs Args)
-show_help = withArgs ["--help"] parse_args
-
-
-
-parse_args :: IO (CmdArgs Args)
-parse_args = do
-  x <- getArgs
-  let y = process arg_spec x
-  case y of
-    Right result -> return result
-    Left err -> do
-      hPutStrLn stderr err
-      exitWith (ExitFailure exit_args_parse_failed)
 
 
--- | Really get the command-line arguments. This calls 'parse_args'
---   first to replace the default "wrong number of arguments" error,
---   and then runs 'cmdArgsApply' on the result to do what the
---   'cmdArgs' function usually does.
-apply_args :: IO Args
-apply_args =
-  parse_args >>= cmdArgsApply
+get_args :: IO Args
+get_args = cmdArgs arg_spec