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80 lines
3.4 KiB
Haskell
80 lines
3.4 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,optsToFilterSpec)
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import System.Directory (doesFileExist)
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import System.IO
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import System.Exit
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import System.Cmd (system)
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import System.Info (os)
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import System.Time (getClockTime)
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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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tc <- getClockTime
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let go = cmd opts args . filterAndCacheLedgerWithOpts opts args t rawtext . (\rl -> rl{filepath=f,filereadtime=tc})
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if creating then go rawLedgerEmpty else (runErrorT . parseLedgerFile t) f
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>>= flip either go
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(\e -> hPutStrLn stderr e >> exitWith (ExitFailure 1))
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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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readLedgerWithFilterSpec (optsToFilterSpec 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 = filterAndCacheLedger . optsToFilterSpec opts args
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-- | Attempt to open a web browser on the given url, all platforms.
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openBrowserOn :: String -> IO ExitCode
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openBrowserOn u = trybrowsers browsers u
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where
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trybrowsers (b:bs) u = do
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e <- system $ printf "%s %s" b u
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case e of
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ExitSuccess -> return ExitSuccess
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ExitFailure _ -> trybrowsers bs u
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trybrowsers [] u = do
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putStrLn $ printf "Sorry, I could not start a browser (tried: %s)" $ intercalate ", " browsers
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putStrLn $ printf "Please open your browser and visit %s" u
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return $ ExitFailure 127
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browsers | os=="darwin" = ["open"]
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| os=="mingw32" = ["start","firefox","safari","opera","iexplore"]
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| otherwise = ["sensible-browser","firefox"]
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-- jeffz: write a ffi binding for it using the Win32 package as a basis
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-- start by adding System/Win32/Shell.hsc and follow the style of any
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-- other module in that directory for types, headers, error handling and
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-- what not.
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-- ::ShellExecute(NULL, "open", "www.somepage.com", NULL, NULL, SW_SHOWNORMAL);
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-- ::ShellExecute(NULL, "open", "firefox.exe", "www.somepage.com" NULL, SW_SHOWNORMAL);
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