Safe Haskell	Safe
Language	Haskell2010

SimpleCmdArgs

Description

This library provides a thin layer on optparse-applicative argument and option parsing, using Parser (IO ()), applying commands directly to their argument parsing.

A few option Mod functions are also provided.

Synopsis

Documentation

simpleCmdArgs Source #

Arguments

:: Maybe Version	version string
-> String	header
-> String	program description
-> Parser (IO ())	commands
-> IO ()

Parser executor (allows interspersed args and options)

simpleCmdArgs (Just version) "summary" "program description" $ myCommand <$> myOptParser <*> myargsParser

simpleCmdArgs' Source #

Arguments

:: Maybe Version	version string
-> String	header
-> String	program description
-> Parser (IO ())	commands
-> IO ()

Parser executor without interspersing options and args

simpleCmdArgs' Nothing "summary" "program description" $ myCommand <$> myOptParser <*> myargsParser

simpleCmdArgsWithMods Source #

Arguments

:: Maybe Version	version string
-> InfoMod (IO ())	modifiers
-> Parser (IO ())	commands
-> IO ()

Generic parser executor with explicit info modifiers

Since: 0.1.1

data Subcommand Source #

Subcommand "command" "help description text" $ myCommand <$> optParser

Constructors

Subcommand String String (Parser (IO ()))

subcommands :: [Subcommand] -> Parser (IO ()) Source #

list of Subcommand that can be run by simpleCmdArgs

strArg :: String -> Parser String Source #

A string arg parser with a METAVAR for help

switchWith :: Char -> String -> String -> Parser Bool Source #

switch with Mods

switchWith 'o' "option" "help description"

Since: 0.1.1

flagWith :: a -> a -> Char -> String -> String -> Parser a Source #

flag with Mods

flagWith offVal onVal 'f' "flag" "help description"

Since: 0.1.2

flagWith' :: a -> Char -> String -> String -> Parser a Source #

flag' with Mods

flagWith' val 'f' "flag" "help description"

Since: 0.1.2

switchMods :: HasName f => Char -> String -> String -> Mod f a Source #

Mods for a switch.

switchMods 'o' "option" "help description"

strOptionWith :: Char -> String -> String -> String -> Parser String Source #

strOption with Mods

strOptionWith 'o' "option" "METAVAR" "help description"

Since: 0.1.1

optionWith :: ReadM a -> Char -> String -> String -> String -> Parser a Source #

option with Mods

optionWith auto 'o' "option" "METAVAR" "help description"

Since: 0.1.1

optionMods :: (HasMetavar f, HasName f) => Char -> String -> String -> String -> Mod f a Source #

Mods for a mandatory option.

optionMods 'o' "option" "METAVAR" "help description"

strOptionalWith :: Char -> String -> String -> String -> String -> Parser String Source #

strOptional with Mods

strOptionalWith 'o' "option" "METAVAR" "help description" default

Since: 0.1.1

optionalWith :: ReadM a -> Char -> String -> String -> String -> a -> Parser a Source #

optional option with Mods, includes a default value.

optionalWith auto 'o' "option" "METAVAR" "help description" default

Since: 0.1.1

optionalMods :: (HasMetavar f, HasName f, HasValue f) => Char -> String -> String -> String -> a -> Mod f a Source #

Mods for an optional option: includes a default value.

optionalMods 'o' "option" "METAVAR" "help description" default

argumentWith :: ReadM a -> String -> Parser a Source #

argument with METAVAR

argumentWith auto "METAVAR"

Since: 0.1.1

data Parser a :: * -> * #

A Parser a is an option parser returning a value of type a.

Instances

Functor Parser
Methods fmap :: (a -> b) -> Parser a -> Parser b # (<$) :: a -> Parser b -> Parser a #
Applicative Parser
Methods pure :: a -> Parser a # (<>) :: Parser (a -> b) -> Parser a -> Parser b # liftA2 :: (a -> b -> c) -> Parser a -> Parser b -> Parser c # (>) :: Parser a -> Parser b -> Parser b # (<*) :: Parser a -> Parser b -> Parser a #
Alternative Parser
Methods empty :: Parser a # (<\|>) :: Parser a -> Parser a -> Parser a # some :: Parser a -> Parser [a] # many :: Parser a -> Parser [a] #

auto :: Read a => ReadM a #

Option reader based on the Read type class.

optional :: Alternative f => f a -> f (Maybe a) #

One or none.