knob: Memory-backed handles

[ library, mit, system ] [ Propose Tags ]

Create memory-backed Handles, referencing virtual files. This is mostly useful for testing Handle-based APIs without having to interact with the filesystem.

import Data.ByteString (pack)
import Data.Knob
import System.IO

main = do
    knob <- newKnob (pack [])
    h <- newFileHandle knob "test.txt" WriteMode
    hPutStrLn h "Hello world!"
    hClose h
    bytes <- Data.Knob.getContents knob
    putStrLn ("Wrote bytes: " ++ show bytes)


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Versions [RSS] 0.1, 0.1.1, 0.2, 0.2.1, 0.2.2
Dependencies base (>=4.15 && <5), bytestring (>=0.9 && <0.12), transformers (>=0.2 && <0.7) [details]
License MIT
Author John Millikin <>
Maintainer Naïm Favier <>
Category System
Home page
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Source repo head: git clone
Uploaded by ncfavier at 2022-03-25T23:47:28Z
Distributions Arch:0.2.2, Debian:0.1.1, LTSHaskell:0.2.2, NixOS:0.2.2, Stackage:0.2.2
Reverse Dependencies 3 direct, 4 indirect [details]
Downloads 6997 total (36 in the last 30 days)
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Status Docs uploaded by user [build log]
All reported builds failed as of 2022-03-26 [all 2 reports]