root / htools / mon-collector.hs @ 55abd2c7
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{-| Main binary for all stand-alone data collectors |
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-} |
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{- |
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Copyright (C) 2012 Google Inc. |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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02110-1301, USA. |
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-} |
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module Main (main) where |
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import Data.Char (toLower) |
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import System.Environment |
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import System.IO |
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import Ganeti.Common |
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import Ganeti.Utils |
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import Ganeti.DataCollectors.CLI (genericOptions, defaultOptions) |
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import Ganeti.DataCollectors.Program (personalities) |
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-- | Display usage and exit. |
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usage :: String -> IO () |
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usage name = do |
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hPutStrLn stderr $ "Unrecognised personality '" ++ name ++ "'." |
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hPutStrLn stderr "This program must be executed specifying one of the \ |
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\following names as the first parameter:" |
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mapM_ (hPutStrLn stderr . (" - " ++) . fst) personalities |
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exitErr "Please specify the desired role." |
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main :: IO () |
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main = do |
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cmd_args <- getArgs |
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let binary = |
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if null cmd_args |
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then "" |
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else head cmd_args |
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name = map toLower binary |
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boolnames = map (\(x, y) -> (x == name, Just y)) personalities |
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case select Nothing boolnames of |
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Nothing -> usage name |
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Just (fn, options, arguments) -> do |
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let actual_args = tail cmd_args |
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real_options <- options |
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(opts, args) <- parseOpts defaultOptions actual_args name |
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(real_options ++ genericOptions) arguments |
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fn opts args |