gookit/slog — release v0.5.2, Lightweight, configurable, extensible logging library

gookit/slog 📑 Lightweight, configurable, extensible logging library written in Go.
Support multi level, multi outputs and built-in multi file logger, buffers, clean, rotate-file handling.

Github https://github.com/gookit/slog

v0.5.2 changelog

Full changelog: https://github.com/gookit/slog/compare/v0.5.1...v0.5.2

Feature

• ✨ feat: Add new option FilePerm to customize the permission on log file creation. issues #102 https://github.com/gookit/slog/commit/699ecd8bc2dea0fb35607ba89d4299e86f96e40b

• ✨ feat: rotatefile - Added new option ModeCreate to support creating log files at rotation time. https://github.com/gookit/slog/commit/8c4a9a08a9b3432a699f6770b73935ecfd42e5b8

Update

• 👔 up: Update and add more unit tests, upgrade goutil to v0.6.10 https://github.com/gookit/slog/commit/693cc04eb0e375183357be18893cbecaa171ffa1

• 📝 doc: Update README document description https://github.com/gookit/slog/commit/cbf77c38db5615a9a7ec8ab07853b2f9e3517bfa

• ✅ test: Add more unit test cases https://github.com/gookit/slog/commit/8468ea470645bb981fb34002176671bac1a9559e

New feature usage

Custom log file permissions

The log file permission flag created by configuring the FilePerm setting of hander.Config.

h1 := handler.MustFileHandler("/tmp/error.log",
  handler.WithLogLevels(slog.DangerLevels),
  handler.WithFilePerm(0644), // <- sets log file permissions
)

slog.PushHandler(h1)

Split files using ModeCreate mode

about RotateMode:

• ModeRename By default, every time rename handles rotation.

• ModeCreate Create files only by split time

Setting RotateMode=ModeCreate allows log files to be created only by split time.

h1 := handler.MustRotateFile(
  "/tmp/error.log",
  rotatefile.EveryHour, // split by hour
  handler.WithLogLevels(slog.DangerLevels),
  handler.WithRotateMode(rotatefile.ModeCreate), // set RotateMode=ModeCreate
)

slog.PushHandler(h1)

Configure the logfile as /tmp/error.log in the above example. When set to ModeCreate mode, the file will not actually be created,
Instead, it will be created according to the actual split time:

/tmp/error.log.20230618_1500
/tmp/error.log.20230618_1600
/tmp/error.log.20230618_1700
...

Tips: The ModeCreate mode can be applied to command-line tool applications. Because they exit after each execution, ModeRename may not be able to split files on time.

And using ModeRename mode will have the following effect:

/tmp/error.log # <- Logs are always written to this file
/tmp/error.log.20230618_1500
/tmp/error.log.20230618_1600
/tmp/error.log.20230618_1700
...

More usage

More usage please see README