linenoise: A lightweight readline-replacement library for Haskell

[ bsd3, library, program, user-interfaces ] [ Propose Tags ]


[Last Documentation]

  • Linenoise
    • Linenoise.Completion
    • Linenoise.Repl
    • Linenoise.Unlift


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Versions [RSS] 0.3.0, 0.3.1, 0.3.2
Dependencies base (>=4.12 && <5), bytestring (>=0.10 && <1), exceptions (>=0.10 && <1), linenoise, mtl (>=2.2 && <3), text (>=1.2 && <2), unliftio-core (>=0.1 && <1) [details]
License BSD-3-Clause
Copyright 2014 Stephen Diehl, 2019 Eric Conlon
Author Stephen Diehl, Eric Conlon
Category User Interfaces
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Source repo head: git clone
Uploaded by ejconlon at 2020-06-20T20:20:33Z
Distributions LTSHaskell:0.3.2, NixOS:0.3.2
Reverse Dependencies 1 direct, 0 indirect [details]
Executables linenoise-demo
Downloads 981 total (11 in the last 30 days)
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Status Docs not available [build log]
All reported builds failed as of 2020-06-20 [all 3 reports]

Readme for linenoise-0.3.2

[back to package description]



A lightweight readline-replacement library for Haskell based on the linenoise library. (Not production ready!) See the demo app for usage, or see the climb library for higher-level building blocks for GHCi-like REPLs with colon-commands.

Differences from alternatives

  • haskeline
    • This uses FFI to a minimal C library vs pure Haskell
    • This uses standard MTL/Unlift typeclasses vs custom ones.
    • This does not require the use of a specific monad transformer.
  • readline
    • This offers a MonadIO/MonadUnliftIO interface vs raw IO.
    • This vendors and statically links its underlying library to simplify the build process.

License and attribution

This library includes the source code and license for linenoise in cbits. It is a fork of an older library with all licensing and attribution preserved.

Development workflow

This project uses stack to build.

The Makefile has a bunch of relevant phony targets for a development workflow including

  • build - Build the library and demo
  • download - Update vendored linenoise
  • demo - Run the demo app
  • deps - Install dev tools
  • lint - Lint with hlint
  • format - Format with stylish-haskell
  • docs - Generate docs

In addition, there are targets starting with ci that are invoked in various CI phases.


  • Support unicode (may involve vendoring a linenoise fork)
  • Verify that the FFI modifications for ByteString are memory-safe