52 lines
2.1 KiB
Haskell
52 lines
2.1 KiB
Haskell
{-|
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Utilities for top-level modules and ghci. See also "Ledger.IO" and
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"Ledger.Utils".
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-}
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module Utils
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where
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import Control.Monad.Error
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import Ledger
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import Options (Opt,ledgerFilePathFromOpts,optsToIOArgs)
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import System.Directory (doesFileExist)
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import System.IO
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-- | Parse the user's specified ledger file and run a hledger command on
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-- it, or report a parse error. This function makes the whole thing go.
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withLedgerDo :: [Opt] -> [String] -> String -> ([Opt] -> [String] -> Ledger -> IO ()) -> IO ()
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withLedgerDo opts args cmdname cmd = do
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-- We kludgily read the file before parsing to grab the full text, unless
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-- it's stdin, or it doesn't exist and we are adding. We read it strictly
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-- to let the add command work.
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f <- ledgerFilePathFromOpts opts
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let f' = if f == "-" then "/dev/null" else f
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fileexists <- doesFileExist f
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let creating = not fileexists && cmdname == "add"
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rawtext <- if creating then return "" else strictReadFile f'
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t <- getCurrentLocalTime
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let go = cmd opts args . filterAndCacheLedgerWithOpts opts args t rawtext . (\rl -> rl{filepath=f})
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case creating of
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True -> return rawLedgerEmpty >>= go
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False -> return f >>= runErrorT . parseLedgerFile t >>= either (hPutStrLn stderr) go
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-- | Get a Ledger from the given string and options, or raise an error.
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ledgerFromStringWithOpts :: [Opt] -> [String] -> LocalTime -> String -> IO Ledger
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ledgerFromStringWithOpts opts args reftime s =
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liftM (filterAndCacheLedgerWithOpts opts args reftime s) $ rawLedgerFromString s
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-- | Read a Ledger from the given file, filtering according to the
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-- options, or give an error.
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readLedgerWithOpts :: [Opt] -> [String] -> FilePath -> IO Ledger
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readLedgerWithOpts opts args f = do
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t <- getCurrentLocalTime
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readLedgerWithIOArgs (optsToIOArgs opts args t) f
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-- | Convert a RawLedger to a canonicalised, cached and filtered Ledger
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-- based on the command-line options/arguments and a reference time.
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filterAndCacheLedgerWithOpts :: [Opt] -> [String] -> LocalTime -> String -> RawLedger -> Ledger
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filterAndCacheLedgerWithOpts opts args t = filterAndCacheLedger (optsToIOArgs opts args t)
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