Shellmet

This module contains neat utilities to be able to work with shell commands in generic and simple way using just string literals.

>>> "echo" ["Hello", "World!"]
⚙  echo Hello 'World!'
Hello World!

Documentation

($|) :: FilePath -> [Text] -> IO Text infix 5

Run shell command with given options and return stripped stdout of the executed command.

>>> "echo" $| ["Foo", "Bar"]
"Foo Bar"

($?) :: IO a -> IO a -> IO a infixl 4

Do some IO actions when process failed with IOError.

>>> "exit" ["0"] $? putStrLn "Command failed"
⚙  exit 0

>>> "exit" ["1"] $? putStrLn "Command failed"
⚙  exit 1
Command failed

Orphan instances

(a ~ [Text], b ~ IO ()) => IsString (a -> b)

This instance is needed to provide functionality to call commands by using simple string literals in IO monad.

>>> "ls" ["-1"]
⚙  ls -1
CHANGELOG.md
CONTRIBUTING.md
dist-newstyle
LICENSE
README.md
shellmet.cabal
src
stack.yaml
test

Methods

fromString :: String -> a -> b