XMobar.App.Opts

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diff --git a/src/Xmobar/App/Opts.hs b/src/Xmobar/App/Opts.hs
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+------------------------------------------------------------------------------
+-- |
+-- Module: Xmobar.App.Opts
+-- Copyright: (c) 2018 Jose Antonio Ortega Ruiz
+-- License: BSD3-style (see LICENSE)
+--
+-- Maintainer: jao@gnu.org
+-- Stability: unstable
+-- Portability: portable
+-- Created: Fri Nov 30, 2018 01:19
+--
+--
+-- Command line option parsing
+--
+------------------------------------------------------------------------------
+
+
+module Xmobar.App.Opts where
+
+import System.Console.GetOpt
+import Data.Version (showVersion)
+
+import Paths_xmobar (version)
+
+data Opts = Help
+          | Debug
+          | Version
+          | Font       String
+          | BgColor    String
+          | FgColor    String
+          | Alpha      String
+          | T
+          | B
+          | D
+          | AlignSep   String
+          | Commands   String
+          | AddCommand String
+          | SepChar    String
+          | Template   String
+          | OnScr      String
+          | IconRoot   String
+          | Position   String
+          | WmClass    String
+          | WmName     String
+       deriving (Show, Eq)
+
+options :: [OptDescr Opts]
+options =
+    [ Option "h?" ["help"] (NoArg Help) "This help"
+    , Option "D" ["debug"] (NoArg Debug) "Emit verbose debugging messages"
+    , Option "V" ["version"] (NoArg Version) "Show version information"
+    , Option "f" ["font"] (ReqArg Font "font name") "Font name"
+    , Option "w" ["wmclass"] (ReqArg WmClass "class") "X11 WM_CLASS property"
+    , Option "n" ["wmname"] (ReqArg WmName "name") "X11 WM_NAME property"
+    , Option "B" ["bgcolor"] (ReqArg BgColor "bg color" )
+      "The background color. Default black"
+    , Option "F" ["fgcolor"] (ReqArg FgColor "fg color")
+      "The foreground color. Default grey"
+    , Option "i" ["iconroot"] (ReqArg IconRoot "path")
+      "Root directory for icon pattern paths. Default '.'"
+    , Option "A" ["alpha"] (ReqArg Alpha "alpha")
+      "Transparency: 0 is transparent, 255 is opaque. Default: 255"
+    , Option "o" ["top"] (NoArg T) "Place xmobar at the top of the screen"
+    , Option "b" ["bottom"] (NoArg B)
+      "Place xmobar at the bottom of the screen"
+    , Option "d" ["dock"] (NoArg D)
+      "Don't override redirect from WM and function as a dock"
+    , Option "a" ["alignsep"] (ReqArg AlignSep "alignsep")
+      "Separators for left, center and right text\nalignment. Default: '}{'"
+    , Option "s" ["sepchar"] (ReqArg SepChar "char")
+      ("Character used to separate commands in" ++
+       "\nthe output template. Default '%'")
+    , Option "t" ["template"] (ReqArg Template "template")
+      "Output template"
+    , Option "c" ["commands"] (ReqArg Commands "commands")
+      "List of commands to be executed"
+    , Option "C" ["add-command"] (ReqArg AddCommand "command")
+      "Add to the list of commands to be executed"
+    , Option "x" ["screen"] (ReqArg OnScr "screen")
+      "On which X screen number to start"
+    , Option "p" ["position"] (ReqArg Position "position")
+      "Specify position of xmobar. Same syntax as in config file"
+    ]
+
+getOpts :: [String] -> IO ([Opts], [String])
+getOpts argv =
+    case getOpt Permute options argv of
+      (o,n,[])   -> return (o,n)
+      (_,_,errs) -> error (concat errs ++ usage)
+
+usage :: String
+usage = usageInfo header options ++ footer
+    where header = "Usage: xmobar [OPTION...] [FILE]\nOptions:"
+          footer = "\nMail bug reports and suggestions to " ++ mail ++ "\n"
+
+info :: String
+info = "xmobar " ++ showVersion version
+        ++ "\n (C) 2007 - 2010 Andrea Rossato "
+        ++ "\n (C) 2010 - 2018 Jose A Ortega Ruiz\n "
+        ++ mail ++ "\n" ++ license
+
+mail :: String
+mail = "<mail@jao.io>"
+
+license :: String
+license = "\nThis program is distributed in the hope that it will be useful," ++
+          "\nbut WITHOUT ANY WARRANTY; without even the implied warranty of" ++
+          "\nMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." ++
+          "\nSee the License for more details."