131 lines
5.0 KiB
Haskell
131 lines
5.0 KiB
Haskell
module Options
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where
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import System
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import System.Console.GetOpt
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import System.Directory
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import Text.Printf
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import Ledger.AccountName (negativepatternchar)
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usagehdr = "Usage: hledger [OPTS] balance|print|register [ACCTPATS] [-- DESCPATS]\n\nOptions"++warning++":"
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warning = if negativepatternchar=='-' then " (must appear before command)" else " (can appear anywhere)"
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usageftr = "\n" ++
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"Commands (may be abbreviated):\n" ++
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"balance - show account balances\n" ++
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"print - show parsed and reformatted ledger entries\n" ++
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"register - show register transactions\n" ++
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"\n" ++
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"Account and description patterns are regular expressions, optionally prefixed\n" ++
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"with " ++ [negativepatternchar] ++ " to make them negative.\n"
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defaultfile = "~/.ledger"
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fileenvvar = "LEDGER"
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optionorder = if negativepatternchar=='-' then RequireOrder else Permute
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-- | Command-line options we accept.
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options :: [OptDescr Opt]
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options = [
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Option ['f'] ["file"] (ReqArg File "FILE") "ledger file; - means use standard input",
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Option ['b'] ["begin"] (ReqArg Begin "YYYY/MM/DD") "report on entries on or after this date",
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Option ['e'] ["end"] (ReqArg End "YYYY/MM/DD") "report on entries prior to this date",
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Option ['C'] ["cleared"] (NoArg Cleared) "report only on cleared entries",
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Option ['E'] ["empty"] (NoArg Empty) "balance report: show accounts with zero balance",
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Option ['R'] ["real"] (NoArg Real) "report only on real (non-virtual) transactions",
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Option ['n'] ["collapse"] (NoArg Collapse) "balance report: no grand total",
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Option ['s'] ["subtotal"] (NoArg SubTotal) "balance report: show subaccounts",
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Option ['h'] ["help","usage"] (NoArg Help) "show this help",
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Option ['V'] ["version"] (NoArg Version) "show version"
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]
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-- | An option value from a command-line flag.
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data Opt =
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File String |
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Begin String |
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End String |
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Cleared |
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Empty |
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Real |
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Collapse |
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SubTotal |
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Help |
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Version
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deriving (Show,Eq)
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usage = usageInfo usagehdr options ++ usageftr
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versionno = "0.2"
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version = printf "hledger version %s \n" versionno :: String
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-- | Parse the command-line arguments into ledger options, ledger command
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-- name, and ledger command arguments
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parseArguments :: IO ([Opt], String, [String])
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parseArguments = do
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args <- getArgs
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case (getOpt optionorder options args) of
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(opts,cmd:args,[]) -> return (opts, cmd, args)
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(opts,[],[]) -> return (opts, [], [])
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(_,_,errs) -> ioError (userError (concat errs ++ usage))
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-- | Get the ledger file path from options, an environment variable, or a default
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ledgerFilePathFromOpts :: [Opt] -> IO String
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ledgerFilePathFromOpts opts = do
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envordefault <- getEnv fileenvvar `catch` \_ -> return defaultfile
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paths <- mapM tildeExpand $ [envordefault] ++ (concatMap getfile opts)
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return $ last paths
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where
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getfile (File s) = [s]
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getfile _ = []
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-- | Expand ~ in a file path (does not handle ~name).
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tildeExpand :: FilePath -> IO FilePath
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tildeExpand ('~':[]) = getHomeDirectory
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tildeExpand ('~':'/':xs) = getHomeDirectory >>= return . (++ ('/':xs))
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--handle ~name, requires -fvia-C or ghc 6.8:
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--import System.Posix.User
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-- tildeExpand ('~':xs) = do let (user, path) = span (/= '/') xs
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-- pw <- getUserEntryForName user
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-- return (homeDirectory pw ++ path)
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tildeExpand xs = return xs
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-- | get the value of the begin date option, or a default
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beginDateFromOpts :: [Opt] -> String
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beginDateFromOpts opts =
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case beginopts of
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(x:_) -> last beginopts
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_ -> defaultdate
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where
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beginopts = concatMap getbegindate opts
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getbegindate (Begin s) = [s]
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getbegindate _ = []
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defaultdate = ""
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-- | get the value of the end date option, or a default
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endDateFromOpts :: [Opt] -> String
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endDateFromOpts opts =
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case endopts of
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(x:_) -> last endopts
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_ -> defaultdate
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where
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endopts = concatMap getenddate opts
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getenddate (End s) = [s]
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getenddate _ = []
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defaultdate = ""
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-- | Gather any ledger-style account/description pattern arguments into
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-- two lists. These are 0 or more account patterns optionally followed by
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-- -- and 0 or more description patterns.
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parseAccountDescriptionArgs :: [String] -> ([String],[String])
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parseAccountDescriptionArgs args = (as, ds')
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where (as, ds) = break (=="--") args
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ds' = dropWhile (=="--") ds
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-- testoptions RequireOrder ["foo","-v"]
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-- testoptions Permute ["foo","-v"]
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-- testoptions (ReturnInOrder Arg) ["foo","-v"]
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-- testoptions Permute ["foo","--","-v"]
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-- testoptions Permute ["-?o","--name","bar","--na=baz"]
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-- testoptions Permute ["--ver","foo"]
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testoptions order cmdline = putStr $
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case getOpt order options cmdline of
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(o,n,[] ) -> "options=" ++ show o ++ " args=" ++ show n
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(_,_,errs) -> concat errs ++ usage
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