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# logutils
logutils is a Go package that augments the standard library "log" package
to make logging a bit more modern, without fragmenting the Go ecosystem
with new logging packages.
## The simplest thing that could possibly work
Presumably your application already uses the default `log` package. To switch, you'll want your code to look like the following:
```go
package main
import (
"log"
"os"
"github.com/hashicorp/logutils"
)
func main() {
filter := &logutils.LevelFilter{
Levels: []logutils.LogLevel{"DEBUG", "WARN", "ERROR"},
MinLevel: logutils.LogLevel("WARN"),
Writer: os.Stderr,
}
log.SetOutput(filter)
log.Print("[DEBUG] Debugging") // this will not print
log.Print("[WARN] Warning") // this will
log.Print("[ERROR] Erring") // and so will this
log.Print("Message I haven't updated") // and so will this
}
```
This logs to standard error exactly like go's standard logger. Any log messages you haven't converted to have a level will continue to print as before.
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