Added the cli parser and a config file handler for hsbot-irc.

HsbotIrcBot/Main.hs

@@ -0,0 +1,83 @@
+module Main (main) where
+
+import Control.Monad (when)
+import Prelude hiding (catch)
+import System.Console.GetOpt
+import System.Environment
+import System.Exit
+import System.IO
+
+import Hsbot.Irc.Config
+
+-- | Main function
+main :: IO ()
+main = do
+    args <- getArgs
+    -- Parse options, getting a list of option actions
+    let (actions, nonOptions, errors) = getOpt RequireOrder options args
+    -- Here we thread startOptions through all supplied option actions
+    opts <- case (nonOptions, errors) of
+        ([], []) -> foldl (>>=) (return defaultOptions) actions
+        (_, _) -> do
+            hPutStrLn stderr $ concat errors ++ usageInfo header options
+            exitWith $ ExitFailure 1
+    -- From there the initialization code truly begins
+    when (optDebug opts) . putStrLn $ "Got options : " ++ (show opts)
+    -- We find and parse the config file
+    ircConfig <- getIrcConfig $ optConfigFile opts
+    print $ ircConfigChannels ircConfig
+    print $ ircConfigPlugins ircConfig
+
+-- CLI argument parting stuff {{{
+-- | CLI options
+data Options = Options
+    { optDebug      :: Bool
+    , optConfigFile :: Maybe String
+    , optGroup      :: Maybe String
+    , optUser       :: Maybe String
+    , optVerbose    :: Bool
+    } deriving (Show)
+
+-- | CLI default options
+defaultOptions :: Options
+defaultOptions = Options { optDebug      = False
+                         , optConfigFile = Nothing
+                         , optGroup      = Nothing
+                         , optUser       = Nothing
+                         , optVerbose    = False }
+
+-- | CLI options logic
+options :: [ OptDescr (Options -> IO Options) ]
+options =
+    [ Option "d" ["debug"]
+        (NoArg (\opt -> return opt { optDebug = True, optVerbose = True }))
+        "Enter verbose debug mode and prevents Hsbot from forking in background"
+    , Option "f" ["file"]
+        (ReqArg (\arg opt -> return opt { optConfigFile = return arg }) "<config_file>")
+        "The config file to use"
+    , Option "g" ["group"]
+        (ReqArg (\arg opt -> return opt { optGroup = return arg }) "<group>")
+        "The group hsbot will run as"
+    , Option "h" ["help"]
+        (NoArg (\_ -> do
+                    putStrLn $ usageInfo header options
+                    exitWith ExitSuccess))
+        "Print this help message"
+    , Option "u" ["user"]
+        (ReqArg (\arg opt -> return opt { optUser = return arg }) "<user>")
+        "The user hsbot will run as"
+    , Option "v" ["verbose"]
+        (NoArg (\opt -> return opt { optVerbose = True }))
+        "Enable verbose messages"
+    , Option "V" ["version"]
+        (NoArg (\_ -> do
+                    putStrLn "hsbot-irc version 0.3"
+                    exitWith ExitSuccess))
+        "Show version"
+    ]
+
+-- | Usage header
+header :: String
+header = "Usage: hsbot-irc [-dhvV] [-f config_file] [-u user] [-g group]"
+-- }}}
+