119 lines
3.7 KiB
Haskell
119 lines
3.7 KiB
Haskell
#!/usr/bin/env runhaskell
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{-|
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hledger - a ledger-compatible text-based accounting tool.
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Copyright (c) 2007-2008 Simon Michael <simon@joyful.com>
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Released under GPL version 3 or later.
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This is a minimal haskell clone of John Wiegley's ledger
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<http://newartisans.com/software/ledger.html>. hledger generates
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simple ledger-compatible register & balance reports from a plain text
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ledger file, and demonstrates a (naive) purely functional
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implementation of ledger.
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This module includes some helpers for working with your ledger in ghci. Examples:
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> $ rm -f hledger.o
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> $ ghci hledger.hs
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> *Main> l <- ledger
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> Ledger with 696 entries, 132 accounts
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> *Main> putStr $ drawTree $ treemap show $ accountnametree l
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> ...
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> *Main> putStr $ showLedgerAccounts l 1
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> ...
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> *Main> printregister l
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> ...
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> *Main> accounts l
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> ...
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> *Main> accountnamed "expenses:food:groceries"
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> Account expenses:food:groceries with 60 transactions
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-}
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module Main
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where
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import System
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import qualified Data.Map as Map (lookup)
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import Options
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import Tests (hunit, quickcheck)
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import Ledger.Parse (parseLedgerFile, parseError)
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import Ledger.Utils hiding (test)
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import Ledger hiding (rawledger)
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main :: IO ()
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main = do
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(opts, (cmd:args)) <- getArgs >>= parseOptions
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let pats = parsePatternArgs args
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run cmd opts pats
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where run cmd opts pats
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| Help `elem` opts = putStr usage
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| cmd `isPrefixOf` "selftest" = selftest opts pats
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| cmd `isPrefixOf` "print" = print_ opts pats
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| cmd `isPrefixOf` "register" = register opts pats
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| cmd `isPrefixOf` "balance" = balance opts pats
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| otherwise = putStr usage
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type Command = [Flag] -> (Regex,Regex) -> IO ()
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selftest :: Command
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selftest opts pats = do
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hunit
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quickcheck
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return ()
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print_ :: Command
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print_ opts pats = parseLedgerAndDo opts pats printentries
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register :: Command
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register opts pats = parseLedgerAndDo opts pats printregister
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balance :: Command
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balance opts pats = parseLedgerAndDo opts pats printbalance
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where
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printbalance :: Ledger -> IO ()
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printbalance l = putStr $ showLedgerAccounts l depth
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where
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showsubs = (ShowSubs `elem` opts)
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depth = case (pats, showsubs) of
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-- when there are no filter patterns and no -s, show
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-- only to depth 1. (This was clearer when we used maybe.)
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(nullpats, False) -> 1
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otherwise -> 9999
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-- | parse the user's specified ledger file and do some action with it
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-- (or report a parse error). This function makes the whole thing go.
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parseLedgerAndDo :: [Flag] -> (Regex,Regex) -> (Ledger -> IO ()) -> IO ()
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parseLedgerAndDo opts pats cmd = do
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path <- ledgerFilePath opts
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parsed <- parseLedgerFile path
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case parsed of Left err -> parseError err
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Right l -> cmd $ cacheLedger l pats
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-- ghci helpers
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-- | get a RawLedger from the file your LEDGER environment variable points to
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-- or (WARNING) an empty one if there was a problem.
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rawledger :: IO RawLedger
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rawledger = do
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parsed <- ledgerFilePath [] >>= parseLedgerFile
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return $ either (\_ -> RawLedger [] [] [] "") id parsed
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-- | as above, and convert it to a cached Ledger
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ledger :: IO Ledger
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ledger = do
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l <- rawledger
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return $ cacheLedger l nullpats
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-- | get a Ledger from the given file path
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rawledgerfromfile :: String -> IO RawLedger
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rawledgerfromfile f = do
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parsed <- ledgerFilePath [File f] >>= parseLedgerFile
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return $ either (\_ -> RawLedger [] [] [] "") id parsed
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-- | get a named account from your ledger file
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accountnamed :: AccountName -> IO Account
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accountnamed a = ledger >>= (return . fromMaybe nullacct . Map.lookup a . accounts)
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