haskellscript: Command line tool for running Haskell scripts with a hashbang.

[ bsd3, development, program ] [ Propose Tags ]

This tool provides the ability to script in a shell with Haskell (including dependencies) the same way that has been possible with bash scripts or Python.


Print out JSON constructed with Aeson


Lookup weather for your current IP address



A sandbox capable install of Cabal.


The script falls into three main parts:

  • The hashbang first line:

#!/usr/bin/env haskellscript
  • Dependencies (potentially including versions):

  • The code:

import Data.Aeson
import Data.ByteString.Lazy hiding (putStrLn, unpack)
import Data.Text
import Data.Text.Encoding
jsonExample = object ["Test" .= True, "Example" .= True]
main = putStrLn $ unpack $ decodeUtf8 $ toStrict $ encode jsonExample

Note that because the dependencies specified are hashed to enable re-use it's worth specifying exact versions across multiple scripts to prevent the version used being quite old after a while.


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Versions [RSS], 0.1.1, 0.1.2, 0.2.0, 0.2.1, 0.2.2, 0.2.3
Dependencies base (>=4.6 && <4.9), cryptohash, directory, either, filepath, mtl, process, text [details]
License BSD-3-Clause
Copyright Copyright (C) 2015 Sean Parsons
Author Sean Parsons
Maintainer github@futurenotfound.com
Category Development
Home page http://github.com/seanparsons/haskellscript/
Bug tracker http://github.com/seanparsons/haskellscript/issues
Source repo head: git clone git://github.com/seanparsons/haskellscript.git
Uploaded by seanparsons at 2015-05-28T21:58:36Z
Reverse Dependencies 1 direct, 0 indirect [details]
Executables haskellscript
Downloads 4472 total (27 in the last 30 days)
Rating (no votes yet) [estimated by Bayesian average]
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Status Docs not available [build log]
Last success reported on 2015-11-12 [all 7 reports]