hslogger

Versatile logging framework

Version on this page:	1.3.1.0@rev:5
LTS Haskell 24.45:	1.3.2.0
Stackage Nightly 2026-06-15:	1.3.2.0
Latest on Hackage:	1.3.2.0

See all snapshots hslogger appears in

BSD-3-Clause licensed by John Goerzen

Maintained by [email protected]

This version can be pinned in stack with:hslogger-1.3.1.0@sha256:e40119589bc3299fe3f1ae84c067b0b056f96338b37daa19e6151d6233f9a2e1,2899

Module documentation for 1.3.1.0

System
- System.Log

Depends on 9 packages(full list with versions):

base, bytestring, containers, deepseq, network, network-bsd, old-locale, time, unix

Used by 11 packages in lts-18.28(full list with versions):

dbus-hslogger, dhall-lsp-server, happstack-server, haskell-lsp, hie-bios, lambdabot-core, lsp, lsp-types, MissingH, nvim-hs, status-notifier-item

hslogger is a logging framework for Haskell, roughly similar to Python's logging module.

hslogger lets each log message have a priority and source be associated with it. The programmer can then define global handlers that route or filter messages based on the priority and source. hslogger also has a Syslog handler built in.

Changes

1.3.1.0 (minor)

Evaluate message before taking lock in simple handler (#49)
Define Typeable, Data, Generic and NFData instances for System.Log.Priority (#43)

1.3.0.0 (major)

[semantic change] Messages are encoded as UTF-8 (previously the encoding was locale dependent) for the Syslog and Growl backends
Add support for network-3.0; remove redundant dependency on directory and process