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{- Copyright (C) 2011, Benjamin Drung <bdrung@debian.org>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-}
module DebianDistroInfo where
import Data.List
import Data.Time
import System.Console.GetOpt
import System.Environment
import System.Exit
import System.IO
import System.Locale
import Text.CSV
import DistroInfo
-- | Trim whitespaces from given string (similar to Python function)
trim :: String -> String
trim = reverse . trimLeft . reverse . trimLeft
where trimLeft = dropWhile (`elem` " \t\n\r")
data Options = Options { optDate :: Day
, optFilter :: Maybe (Day -> [DebianEntry] -> [DebianEntry])
, optFormat :: DebianEntry -> String
}
startOptions :: IO Options
startOptions = do
today <- getCurrentTime
return Options { optDate = utctDay today,
optFilter = Nothing,
optFormat = debSeries
}
onlyOneFilter :: a
onlyOneFilter = error ("You have to select exactly one of --all, " ++
"--devel, --oldstable, --stable, --supported, " ++
"--testing, --unsupported.")
options :: [OptDescr (Options -> IO Options)]
options =
let
debVersionOrSeries e =
let
version = debVersion e
in
if version /= ""
then version
else debSeries e
readDate arg opt =
return opt { optDate = readTime defaultTimeLocale "%F" arg }
printHelp _ =
do
prg <- getProgName
hPutStr stderr ("Usage: " ++ prg ++ " [options]\n\nOptions:")
hPutStrLn stderr (usageInfo "" options)
hPutStrLn stderr ("See " ++ prg ++ "(1) for more info.")
exitWith ExitSuccess
setFilter debianFilter opt =
case optFilter opt of
Nothing -> return opt { optFilter = Just debianFilter }
Just _ -> onlyOneFilter
in
[ Option "h" ["help"] (NoArg printHelp) "show this help message and exit"
, Option "" ["date"] (ReqArg readDate "DATE")
"date for calculating the version (default: today)"
, Option "a" ["all"] (NoArg (setFilter debianAll))
"list all known versions"
, Option "d" ["devel"] (NoArg (setFilter debianDevel))
"latest development version"
, Option "o" ["oldstable"] (NoArg (setFilter debianOldstable))
"latest oldstable version"
, Option "s" ["stable"] (NoArg (setFilter debianStable))
"latest stable version"
, Option "" ["supported"] (NoArg (setFilter debianSupported))
"list of all supported stable versions"
, Option "t" ["testing"] (NoArg (setFilter debianTesting))
"current testing version"
, Option "" ["unsupported"] (NoArg (setFilter debianUnsupported))
"list of all unsupported stable versions"
, Option "c" ["codename"]
(NoArg (\ opt -> return opt { optFormat = debSeries }))
"print the codename (default)"
, Option "r" ["release"]
(NoArg (\ opt -> return opt { optFormat = debVersionOrSeries }))
"print the release version"
, Option "f" ["fullname"]
(NoArg (\ opt -> return opt { optFormat = debFull }))
"print the full name"
]
main :: IO ()
main = do
args <- getArgs
case getOpt RequireOrder options args of
(actions, [], []) -> do
Options { optDate = date, optFilter = maybeFilter,
optFormat = format } <- foldl (>>=) startOptions actions
maybeCsv <- parseCSVFromFile "/usr/share/distro-info/debian.csv"
case maybeFilter of
Nothing -> onlyOneFilter
Just debianFilter ->
case maybeCsv of
Left errorMsg -> error $ show errorMsg
Right csvData ->
let
result = map format $ debianFilter date $ debianEntry csvData
in
putStrLn $ concat $ intersperse "\n" result
(_, nonOptions, []) ->
error $ "unrecognized arguments: " ++ unwords nonOptions
(_, _, msgs) -> error $ trim $ concat msgs
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