Support for not using it in CGI context

app/Main.hs

@@ -12,6 +12,7 @@ data Args = Args
     , directory :: FilePath
     , fileHead :: FilePath
     , verbose :: Bool
+    , cgi :: Bool
     }
 
 args :: Parser Args
@@ -35,6 +36,9 @@ args = Args
         ( long "verbose"
        <> short 'v'
        <> help "Verbose mode")
+    <*> switch
+        ( long "cgi"
+       <> help "Output gemini file header")
 
 main :: IO ()
 main = parseArgs =<< execParser opts
@@ -45,7 +49,11 @@ main = parseArgs =<< execParser opts
        <> header "Generate a gemini page index")
 
 parseArgs :: Args -> IO()
-parseArgs (Args t d h False) = do
+parseArgs (Args t d h False False) = do
+    putStrLn $ "# " ++ t
+    putStrLn h
+    mkIndex =<< getDirectoryContents d
+parseArgs (Args t d h False True) = do
     putStr success
     putStrLn $ "# " ++ t
     putStrLn h