mirror of
https://github.com/simonmichael/hledger.git
synced 2024-09-20 10:47:29 +03:00
69 lines
1.8 KiB
Haskell
69 lines
1.8 KiB
Haskell
{-|
|
|
|
|
hledger's cmdargs modes parse command-line arguments to an
|
|
intermediate format, RawOpts (an association list), rather than a
|
|
fixed ADT like CliOpts. This allows the modes and flags to be reused
|
|
more easily by hledger commands/scripts in this and other packages.
|
|
|
|
-}
|
|
|
|
module Hledger.Data.RawOptions (
|
|
RawOpts,
|
|
setopt,
|
|
setboolopt,
|
|
inRawOpts,
|
|
boolopt,
|
|
stringopt,
|
|
maybestringopt,
|
|
listofstringopt,
|
|
intopt,
|
|
maybeintopt,
|
|
maybecharopt
|
|
)
|
|
where
|
|
|
|
import Data.Maybe
|
|
import qualified Data.Text as T
|
|
import Safe
|
|
|
|
import Hledger.Utils
|
|
|
|
|
|
-- | The result of running cmdargs: an association list of option names to string values.
|
|
type RawOpts = [(String,String)]
|
|
|
|
setopt :: String -> String -> RawOpts -> RawOpts
|
|
setopt name val = (++ [(name, quoteIfNeeded $ val)])
|
|
|
|
setboolopt :: String -> RawOpts -> RawOpts
|
|
setboolopt name = (++ [(name,"")])
|
|
|
|
-- | Is the named option present ?
|
|
inRawOpts :: String -> RawOpts -> Bool
|
|
inRawOpts name = isJust . lookup name
|
|
|
|
boolopt :: String -> RawOpts -> Bool
|
|
boolopt = inRawOpts
|
|
|
|
maybestringopt :: String -> RawOpts -> Maybe String
|
|
maybestringopt name = fmap (T.unpack . stripquotes . T.pack) . lookup name . reverse
|
|
|
|
stringopt :: String -> RawOpts -> String
|
|
stringopt name = fromMaybe "" . maybestringopt name
|
|
|
|
maybecharopt :: String -> RawOpts -> Maybe Char
|
|
maybecharopt name rawopts = lookup name rawopts >>= headMay
|
|
|
|
listofstringopt :: String -> RawOpts -> [String]
|
|
listofstringopt name rawopts = [v | (k,v) <- rawopts, k==name]
|
|
|
|
maybeintopt :: String -> RawOpts -> Maybe Int
|
|
maybeintopt name rawopts =
|
|
let ms = maybestringopt name rawopts in
|
|
case ms of Nothing -> Nothing
|
|
Just s -> Just $ readDef (usageError $ "could not parse "++name++" number: "++s) s
|
|
|
|
intopt :: String -> RawOpts -> Int
|
|
intopt name = fromMaybe 0 . maybeintopt name
|
|
|