process-qq

Quasi-Quoters for exec process http://github.com/tanakh/process-qq

Latest on Hackage:0.2.0

This package is not currently in any snapshots. If you're interested in using it, we recommend adding it to Stackage Nightly. Doing so will make builds more reliable, and allow stackage.org to host generated Haddocks.

BSD3 licensed by Hideyuki Tanaka
Maintained by Hideyuki Tanaka

process-qq: A Quasi-Quoter to execute processes

About

This is a simple package for executing external process using quasi-quoters.

Install

$ cabal update
$ cabal install process-qq

API

process-qq has three quasi-quoters, cmd, lcmd and enumCmd.

The result type of cmd is (Strict) ByteString, lcmd is Lazy ByteString, enumCmd's is MonadIO m => Enumerator ByteString m a.

Command is failed, an Exception is thrown.

Command is executed in run-time, not compile-time.

Example

  • Invoke a process simply

{-# LANGUAGE QuasiQuotes #-}
import System.Process.QQ

main = print =<< [cmd|ls|]
  • Enumerate a process

main =
  run_ $ [enumCmd|curl http://www.google.com/|] $$ iterHandle stdout
main = do
  [url] <- getArgs
  print =<< [cmd|curl #{url}|]
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