When calling a Logger method inside a helper function, the recorded source code is the source code of the helper:
func Foo() {
logSomething("hello world", "key": 1, "value": "xyz")
}
func logSomething(msg string, kvs ...any) {
slog.Default().Info("logging " + msg", kvs...)
}
Other logging libraries (zap, go-logr) have a WithCallDepth call for this. testing.T has Helper, but that is less flexible.
It would be useful to add Logger.WithCallDepth, then this example would become:
func logSomething(msg string, kvs ...any) {
slog.Default().WithCallDepth(1).Info("logging " + msg", kvs...)
}
The only solution right now is for logSomething to translate its arguments into a Record, do stack unwinding, then call Handler.Handle. This is doable, but implies copying quite a bit of code from slog because the helper functions which do that in Logger are not exported (and probably shouldn't be).
cc @jba
prochac, xorkevin, telemachus, hanzei, stephenafamo and 8 more
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