Question 1

How to format logs in go-logger?

Accepted Answer

Use the SetFormat method on a logger instance or SetDefaultFormat for the package with verbs like %{time} and %{message}. For example, to include module and level, set format to [%{module}] [%{level}] %{message} as shown in the README.

Question 2

Does go-logger support JSON output?

Accepted Answer

No, go-logger does not natively output JSON. You can mimic JSON by customizing the format string, but it lacks structured JSON serialization, which might require manual work for integration with log aggregators.

Question 3

go-logger vs logrus: which is better?

Accepted Answer

go-logger is simpler and lighter for basic custom formatting and terminal use, while logrus offers more features like hooks, JSON output, and a larger ecosystem. Choose go-logger for straightforward needs and logrus for advanced scenarios.

Question 4

How to log to a file with go-logger?

Accepted Answer

Pass an io.Writer for a file as the third argument when creating a logger with logger.New. For instance, use os.OpenFile to get a file handle and pass it, similar to the example with os.Stdout.

Question 5

Is go-logger thread-safe?

Accepted Answer

The README doesn't specify thread safety. Given its simplicity, it may not handle concurrent writes safely without external synchronization, so test it in multi-threaded environments or consider alternatives for high concurrency.

Question 6

Can I change log levels on the fly?

Accepted Answer

Yes, use the SetLogLevel method on a logger instance to dynamically filter log messages, as demonstrated in the example where Debug messages are printed after setting the level to DebugLevel.

go-logger

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