Added 'return' link option and check if last char is dot

app/Main.hs

@@ -15,6 +15,7 @@ data Args = Args
     , verbose :: Bool
     , names :: Bool
     , cgi :: Bool
+    , back :: Bool
     }
 
 args :: Parser Args
@@ -25,6 +26,7 @@ args = Args
     <*> switch ( long "verbose" <> short 'v' <> help "Verbose mode")
     <*> switch ( long "names" <> short 'n' <> help "Generate link names based on first of each document" )
     <*> switch ( long "cgi" <> help "Output gemini file header")
+    <*> switch ( long "back" <> help "Print 'return to dir' url")
 
 main :: IO ()
 main = parseArgs =<< execParser opts
@@ -35,7 +37,7 @@ main = parseArgs =<< execParser opts
        <> header "Generate a gemini page index")
 
 parseArgs :: Args -> IO()
-parseArgs (Args t dir h v r c) = do
+parseArgs (Args t dir h v r c b) = do
     if c
     then do print CgiSuccess
             putStrLn $ "# " ++ t
@@ -45,19 +47,29 @@ parseArgs (Args t dir h v r c) = do
     then putStr $ "\n" ++ h ++ "\n\n"
     else putStr "\n"
 
-    mapM_ (mkIndex r dir) . filter (isSuffixOf ".gmi") =<< getDirectoryContents dir
+    if b then do
+        mapM_ (mkIndex r dir) . filter (isSuffixOf ".gmi") =<< getDirectoryContents dir
+        putStr "\n"
+        putStrLn "=> ../ "
+    else mapM_ (mkIndex r dir) . filter (isSuffixOf ".gmi") =<< getDirectoryContents dir
 
 mkIndex :: Bool -> FilePath -> FilePath -> IO ()
 
 mkIndex False d l = putStrLn $ "=> " ++ path
     where path = d++"/"++l
 
-mkIndex True d l = do
-    line <- trim . words . head . lines <$> readFile path
-    putStrLn $ "=> " ++ path ++ " " ++ line
-    where path = d++"/"++l
-          trim s
-            | length s >= 8 = (++ "...") . unwords . take 8 . cleanString $ s
-            | otherwise = unwords . cleanString $ s
-            -- remove all '#' signs and any potential resulting empty lists
-            where cleanString = filter(/="") . map (dropWhile (=='#'))
+mkIndex True d l =
+  let path = d ++ "/" ++ l
+      trim s
+        | length s >= 8 = appendDots . unwords . take 8 . cleanString $ s
+        | otherwise = unwords . cleanString $ s
+        where
+          -- remove all '#' signs and any potential resulting empty lists
+          cleanString = filter (/= "") . map (dropWhile (== '#'))
+          -- in case the last character is a dot, remove it
+          appendDots name
+            | last name == '.' = (++ "...") . init $ name
+            | otherwise = name
+   in do
+        line <- trim . words . head . lines <$> readFile path
+        putStrLn $ "=> " ++ path ++ " " ++ line