| definition: |
processOptions :: String -> [String] -> IO (Options,[String])
processOptions banner argv = do
dfltoptions <- getDefaultOptions
isterminal <- hIsTerminalDevice stdout
let opts0 = dfltoptions { optColor = isterminal }
let (funopts, args, opterrors) = getOpt Permute options argv
opts1 = foldl (flip id) opts0 funopts
unless (null opterrors)
(putStr (unlines opterrors) >> printUsage >> exitWith 1)
when (optHelp opts1) (printUsage >> exitWith 0)
when (not (null (optGenFrom opts1)) && not (optGenerate opts1))
(putStrLn "Superfluous file with generate data!" >> exitWith 1)
let opts2 = -- Generate on the web server only if --remote is explicitly used:
if optGenerate opts1 && "--remote" `notElem` argv
then opts1 { optRemote = False }
else opts1
return (opts2, args)
where
printUsage = putStrLn (banner ++ "\n" ++ usageText)
|
| demand: |
no demanded arguments |
| deterministic: |
deterministic operation |
| documentation: |
Process the actual command line arguments and return the options and the name of the main program. |
| failfree: |
<FAILING> |
| indeterministic: |
referentially transparent operation |
| infix: |
no fixity defined |
| iotype: |
{(_,_) |-> _}
|
| name: |
processOptions |
| precedence: |
no precedence defined |
| result-values: |
_ |
| signature: |
String -> [String] -> Prelude.IO (Options, [String]) |
| solution-complete: |
operation might suspend on free variables |
| terminating: |
possibly non-terminating |
| totally-defined: |
possibly non-reducible on same data term |