hslogger

Versatile logging framework

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

Version on this page:1.3.1.1
LTS Haskell 24.24:1.3.2.0
Stackage Nightly 2025-12-15:1.3.2.0
Latest on Hackage:1.3.2.0

See all snapshots hslogger appears in

BSD-3-Clause licensed by John Goerzen
Maintained by https://github.com/haskell-hvr/hslogger
This version can be pinned in stack with:hslogger-1.3.1.1@sha256:412697baa7d9d0799e5a576df146653e8ff5fb010717d52e78626c3dfe835306,2848

Module documentation for 1.3.1.1

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

See also https://pvp.haskell.org/faq

1.3.1.1 (patch)

  • Drop support for GHC 7
  • Tested with GHC 8.0 - 9.10

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