tools/protocolParser.hs
author unc0rr
Sat, 21 Nov 2015 00:42:11 +0300
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module Main where
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import Text.PrettyPrint.HughesPJ
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import qualified Data.MultiMap as MM
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import Data.Maybe
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import Data.List
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import Data.Char
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import qualified Data.Set as Set
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data HWProtocol = Command String [CmdParam]
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    deriving Show
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instance Ord HWProtocol where
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    (Command a _) `compare` (Command b _) = a `compare` b    
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instance Eq HWProtocol where
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    (Command a _) == (Command b _) = a == b
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data CmdParam = Skip
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              | SS
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              | LS
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              | IntP
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              | Many [CmdParam]
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    deriving Show
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data ParseTree = PTPrefix String [ParseTree]
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               | PTCommand String HWProtocol
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    deriving Show
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cmd = Command
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cmd1 s p = Command s [p]
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cmd2 s p1 p2 = Command s [p1, p2]
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cmdName (Command n _) = n
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cmdParams2str (Command _ p) = "TCmdParam" ++ concatMap f p
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    where
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    f Skip = ""
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    f SS = "S"
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    f LS = "L"
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    f IntP = "i"
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    f (Many p) = ""
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cmdParams2handlerType (Command _ p) = "handler_" ++ concatMap f p
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    where
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    f Skip = "_"
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    f SS = "S"
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    f LS = "L"
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    f IntP = "i"
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    f (Many p) = 'M' : concatMap f p
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cmdParams2record cmd@(Command _ p) = renderStyle style{lineLength = 80} $ 
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    text "type " <> text (cmdParams2str cmd)
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    <> text " = record" $+$ nest 4 (
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    vcat (map (uncurry f) $ zip [1..] $ filter isRendered p) 
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    $+$ text "end;")
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    where
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    isRendered Skip = False
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    isRendered (Many _) = False
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    isRendered _ = True
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    f n Skip = empty
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    f n SS = text "str" <> int n <> text ": shortstring;"
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    f n LS = text "str" <> int n <> text ": longstring;"
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    f n IntP = text "param" <> int n <> text ": LongInt;"
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    f _ (Many _) = empty
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commandsDescription = [
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        cmd "CONNECTED" [Skip, IntP]
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        , cmd1 "NICK" SS
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        , cmd1 "PROTO" IntP
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        , cmd1 "ASKPASSWORD" SS
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        , cmd1 "SERVER_AUTH" SS
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        , cmd1 "JOINING" SS
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        , cmd1 "TEAM_ACCEPTED" SS
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        , cmd1 "HH_NUM" $ Many [SS]
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        , cmd1 "TEAM_COLOR" $ Many [SS]
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        , cmd1 "BANLIST" $ Many [SS]
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        , cmd1 "JOINED" $ Many [SS]
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        , cmd1 "LOBBY:JOINED" $ Many [SS]
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        , cmd2 "LOBBY:LEFT" SS LS
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        , cmd2 "CLIENT_FLAGS" SS $ Many [SS]
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        , cmd2 "LEFT" SS $ Many [SS]
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        , cmd1 "SERVER_MESSAGE" LS
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        , cmd1 "ERROR" LS
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        , cmd1 "NOTICE" LS
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        , cmd1 "WARNING" LS
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        , cmd1 "EM" $ Many [LS]
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        , cmd1 "PING" $ Many [SS]
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        , cmd2 "CHAT" SS LS
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        , cmd2 "SERVER_VARS" SS LS
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        , cmd2 "BYE" SS LS
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        , cmd1 "INFO" $ Many [SS]
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        , cmd1 "ROOM" $ Many [SS]
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        , cmd1 "ROOMS" $ Many [SS]
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        , cmd "KICKED" []
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        , cmd "RUN_GAME" []
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        , cmd "ROUND_FINISHED" []
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    ]
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hasMany = any isMany
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isMany (Many _) = True
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isMany _ = False
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unknown = Command "__UNKNOWN__" [Many [SS]]
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unknowncmd = PTPrefix "$" [PTCommand "$" $ unknown]
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fixName = map fixChar
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fixChar c | isLetter c = c
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          | otherwise = '_'
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groupByFirstChar :: [ParseTree] -> [(Char, [ParseTree])]
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groupByFirstChar = MM.assocs . MM.fromList . map breakCmd
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    where
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    breakCmd (PTCommand (c:cs) params) = (c, PTCommand cs params)
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makePT cmd@(Command n p) = PTCommand n cmd
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buildParseTree cmds = [PTPrefix "!" $ (bpt $ map makePT cmds) ++ [unknowncmd]]
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bpt cmds = if not . null $ fst emptyNamed then cmdLeaf emptyNamed else subtree
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    where
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        emptyNamed = partition (\(_, (PTCommand n _:_)) -> null n) assocs
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        assocs = groupByFirstChar cmds
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        subtree = map buildsub assocs
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        buildsub :: (Char, [ParseTree]) -> ParseTree
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        buildsub (c, cmds) = let st = bpt cmds in if null $ drop 1 st then maybeMerge c st else PTPrefix [c] st
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        maybeMerge c cmd@[PTCommand {}] = PTPrefix [c] cmd
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        maybeMerge c cmd@[PTPrefix s ss] = PTPrefix (c:s) ss
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        maybeMerge c [] = PTPrefix [c] []
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        cmdLeaf ([(c, hwc:assocs1)], assocs2)
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            | null assocs1 = PTPrefix [c] [hwc] : map buildsub assocs2
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            | otherwise = [buildsub (c, assocs1)] ++ [PTPrefix [] [hwc]] ++ map buildsub assocs2
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dumpTree = vcat . map dt
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    where
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    dt (PTPrefix s st) = text s $$ (nest 1 $ vcat $ map dt st)
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    dt _ = empty
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renderArrays (letters, commands, handlers) = vcat $ punctuate (char '\n') [grr, cmds, l, s, c, bodies, structs, realHandlers, realHandlersArray]
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    where
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        maybeQuotes "$" = text "#0"
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        maybeQuotes s = if null $ tail s then quotes $ text s else text s
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        l = text "const letters: array[0.." <> (int $ length letters - 1) <> text "] of char = "
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            <> parens (hsep . punctuate comma $ map maybeQuotes letters) <> semi
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        s = text "const commands: array[0.." <> (int $ length commands - 1) <> text "] of integer = "
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            <> parens (hsep . punctuate comma $ map text commands) <> semi
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        c = text "const handlers: array[0.." <> (int $ length fixedNames - 1) <> text "] of PHandler = "
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            <> parens (hsep . punctuate comma $ map (text . (:) '@') handlerTypes) <> semi
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        grr = text "const net2cmd: array[0.." <> (int $ length fixedNames - 1) <> text "] of TCmdType = "
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            <> parens (hsep . punctuate comma $ map (text . (++) "cmd_") $ reverse fixedNames) <> semi
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        handlerTypes = map cmdParams2handlerType $ reverse sortedCmdDescriptions
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        sortedCmdDescriptions = sort commandsDescription
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        fixedNames = map fixName handlers
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        bodies = vcat $ punctuate (char '\n') $ map handlerBody $ nub $ sort handlerTypes
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        handlerBody n = text "procedure " <> text n <> semi
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            $+$ text "begin" 
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            $+$ text "end" <> semi
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        cmds = text "type TCmdType = " <> parens (hsep $ punctuate comma $ concatMap (rhentry "cmd_") $ sortedCmdDescriptions) <> semi
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        structs = vcat (map text . Set.toList . Set.fromList $ map cmdParams2record commandsDescription)
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        realHandlers = vcat $ punctuate (char '\n') $ map rh $ sortedCmdDescriptions
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        realHandlersArray = text "const handlers: array[TCmdType] of PHandler = "
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            <> parens (hsep . punctuate comma . concatMap (rhentry "@handler_") $ sortedCmdDescriptions) <> semi
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rh cmd@(Command n p) = text "procedure handler_" <> text (fixName n) <> parens (text "var p: " <> text (cmdParams2str cmd)) <> semi
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    $+$ emptyBody $+$ if hasMany p then vcat [space, text "procedure handler_" <> text (fixName n) <> text "_s" <> parens (text "var s: TCmdParamS") <> semi
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    , emptyBody] else empty
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    where
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        emptyBody = text "begin"  $+$ text "end" <> semi
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rhentry prefix cmd@(Command n p) = map ((<>) (text "PHandler") . parens) $ (text . (++) prefix . fixName . cmdName $ cmd)
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    : if hasMany p then [text . flip (++) "_s" . (++) prefix . fixName . cmdName $ cmd] else []
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pas = renderArrays $ buildTables $ buildParseTree commandsDescription
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    where
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        buildTables cmds = let (_, _, _, t1, t2, t3) = foldr walk (0, [0], -10, [], [], [[]]) cmds in (tail t1, tail t2, concat t3)
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        walk (PTCommand _ (Command n params)) (lc, s:sh, pc, tbl1, tbl2, (t3:tbl3)) =
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            (lc, 1:sh, pc - 1, "#10":tbl1, show pc:tbl2, (n:t3):tbl3)
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        walk (PTPrefix prefix cmds) l = lvldown $ foldr fpf (foldr walk (lvlup l) cmds) prefix
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        lvlup (lc, sh, pc, tbl1, tbl2, tbl3) = (lc, 0:sh, pc, tbl1, tbl2, []:tbl3)
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        lvldown (lc, s1:s2:sh, pc, tbl1, t:tbl2, t31:t32:tbl3) = (lc, s1+s2:sh, pc, tbl1, (if null t32 then "0" else show s1):tbl2, (t31 ++ t32):tbl3)
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        fpf c (lc, s:sh, pc, tbl1, tbl2, tbl3) = (lc + 1, s+1:sh, pc, [c]:tbl1, "0":tbl2, tbl3)
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main =
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    putStrLn $ renderStyle style{lineLength = 80} $ pas
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    --putStrLn $ renderStyle style{lineLength = 80} $ dumpTree $ buildParseTree commandsDescription