concurrent-output

Ungarble output from several threads or commands

Version on this page:	1.10.14
LTS Haskell 24.18:	1.10.21
Stackage Nightly 2025-11-04:	1.10.21
Latest on Hackage:	1.10.21

See all snapshots concurrent-output appears in

BSD-2-Clause licensed by Joey Hess, Joachim Breitner

Maintained by Joey Hess

This version can be pinned in stack with:concurrent-output-1.10.14@sha256:97e9cdcc1d406d67821bcee696163ea4512532618aedda8209b254f295bbd855,1667

Module documentation for 1.10.14

System
- System.Console
  - System.Console.Concurrent
    - System.Console.Concurrent.Internal
  - System.Console.Regions
- System.Process
  - System.Process.Concurrent

Depends on 11 packages(full list with versions):

ansi-terminal, async, base, directory, exceptions, process, stm, terminal-size, text, transformers, unix

Used by 3 packages in nightly-2022-01-31(full list with versions):

ascii-progress, hedgehog, tasty-test-reporter

Lets multiple threads and external processes concurrently output to the console, without it getting all garbled up.

Built on top of that is a way of defining multiple output regions, which are automatically laid out on the screen and can be individually updated by concurrent threads. Can be used for progress displays etc.