hslogger

Versatile logging framework

https://github.com/haskell-hvr/hslogger/wiki

Version on this page:	1.3.1.0@rev:9
LTS Haskell 24.23:	1.3.2.0
Stackage Nightly 2025-12-10:	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 https://github.com/haskell-hvr/hslogger

This version can be pinned in stack with:hslogger-1.3.1.0@sha256:2fc8ab7021e0a5b35714539280358a8a3edacdc1b96163387708d90414fa59c7,3008

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 10 packages in lts-21.21(full list with versions):

dbus-hslogger, gtk-sni-tray, gtk-strut, happstack-server, happstack-server-tls, MissingH, Network-NineP, nvim-hs, pontarius-xmpp, 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