nemesis: a task management tool for Haskell

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Organize common shell tasks into a meaningful tree like structure with dependency tracking

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Versions [faq] 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, 2018.1.27
Change log
Dependencies air, base (>=4 && <100), containers, directory, dlist, Glob, mtl, process, time [details]
License BSD-3-Clause
Author Jinjing Wang
Maintainer Jinjing Wang <>
Category Web
Home page
Source repo head: git clone
Uploaded by JinjingWang at Sun Jun 16 09:03:09 UTC 2013
Distributions NixOS:2018.1.27
Downloads 11011 total (508 in the last 30 days)
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Status Hackage Matrix CI
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Maintainer's Corner

For package maintainers and hackage trustees

Readme for nemesis-2013.6.16

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Nemesis: a task management tool for Haskell


import System.Nemesis.Env

main = run $ 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


Create a file named Nemesis

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

main = run - do

  -- desc is optional, it gives some description to the task
  -- task syntax: task "keyword: space seperated dependencies" io-action
  desc "Hunter attack macro"
  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'"


runghc Nemesis

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

runghc Nemesis attack

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


Create namespaces for tasks with the keyword namespace

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

main = run - do

  namespace "eat" - do

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

  namespace "drink" - do

    task "coke" - putStrLn "drinking coke"

Namespaces are referenced as path components.

runghc Nemesis bread

Nemesis: bread does not exist!

runghc Nemesis eat/bread

drinking coke
eating salad
eating bread


  • alias runghc Nemesis to something sweeter, e.g. n