The nemesis package

[Tags:bsd3, library]

smart per project code snippets

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Versions 2009.6.12, 2009.6.13, 2009.6.13.1, 2009.6.13.2, 2009.6.14, 2009.6.14.1, 2009.6.14.2, 2009.6.14.3, 2009.6.24, 2009.6.25, 2009.8.4, 2009.8.16, 2009.8.17, 2009.8.18, 2009.10.7, 2010.10.4, 2010., 2011.6.12, 2011.6.19, 2011.10.12, 2012.5.24, 2012.5.24.1, 2012.12.18, 2013.6.13, 2013.6.16, 2013.6.22, 2013.7.27, 2014.5.19, 2015.5.4, 2016.3.19
Change log
Dependencies air (>=2011.6.19), base (>=4 && <100), containers, data-default, directory, dlist, filepath, mtl, old-time, process, time, transformers [details]
License BSD3
Author Jinjing Wang
Maintainer Jinjing Wang <>
Stability Unknown
Category Web
Home page
Uploaded Thu Jun 13 08:37:28 UTC 2013 by JinjingWang
Distributions NixOS:2016.3.19
Downloads 4795 total (42 in the last 30 days)
0 []
Status Docs uploaded by user
Build status unknown [no reports yet]




Maintainer's Corner

For package maintainers and hackage trustees

Readme for nemesis

Readme for nemesis-2013.6.13

Nemesis: a rake like task management tool for haskell


nemesis = do

    [ "**/*.hi"
    , "**/*.o"
    , "manifest"
  task "dist" - do
    sh "cabal clean"
    sh "cabal configure"
    sh "cabal sdist"

  task "i" (sh "ghci -isrc src/System/Nemesis.hs")

  task "manifest" - do
    sh "find . | grep 'hs$' > manifest"



cabal update
cabal install nemesis


Put the following code into a file named Nemesis

nemesis = do

  -- desc is optional, it gives some description to the task that follows
  desc "Hunter attack macro"

  -- syntax: task "keyword: dependencies" io-action
  task "attack: pet-attack auto-attack" (putStrLn "attack macro done!")

  desc "Pet attack"
  task "pet-attack: mark" - do
    sh "echo 'pet attack'"

  desc "Hunter's mark"
  task "mark" - do
    sh "echo \"casting hunter's mark\""

  desc "Auto attack"
  task "auto-attack" - do
    sh "echo 'auto shoot'"


run nemesis

attack          Hunter attack macro
auto-attack     Auto attack
mark            Hunter's mark
pet-attack      Pet attack

run nemesis attack

casting hunter's mark
pet attack
auto shoot
attack macro done!


Suppose you have the following tasks

nemesis = do

  namespace "eat" - do

    task "bread: salad" - putStrLn "eating bread"
    task "salad: /drink/coke" - putStrLn "nice salad"

  namespace "drink" - do

    task "coke" - putStrLn "drinking coke"


nemesis bread =>
.nemesis: bread does not exist!

nemesis eat/bread =>
drinking coke
nice salad
eating bread


  • Please add .nemesis to .gitignore or equivalents.
  • alias nemesis to something sweeter, e.g. n

Advance usage

Use LANGUAGE pragma

Put a -- Nem line after the Langauge pragma

{-# LANGUAGE QuasiQuotes #-}

-- Nem

nemesis = do
  task "i" (sh "ghci -isrc src/System/Nemesis.hs")

currently the separator -- Nem is hard coded

Bypass preprocessing, i.e. run as EDSL

Define main, i.e. add main = run nemesis in the code. The preprocessor looks for the function main, if it's defined, preprocessing is skipped.

This turns Nemesis into an EDSL in Haskell, runnable by runghc.

For example:

import System.Nemesis.Env
import Air.Env ((-))
import Prelude hiding ((-))

main = run nemesis

nemesis = do
  task "hello" - do
    sh "echo 'hello world'"


runghc Nemesis hello