Merge pull request #5459 from owncloud/excds/feature/Add_line_number_and_file_to_log_messages_when_at_debug_level

Add line number and file to log messages when at debug level.

ocis-pkg/log/log.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"os"
+	"runtime"
 	"strings"
 	"time"
 
@@ -64,6 +65,18 @@ func NopLogger() Logger {
 	return Logger{zerolog.Nop()}
 }
 
+type LineInfoHook struct{}
+
+// Run is a hook to add line info to log messages.
+// I found the zerolog example for this here:
+// https://github.com/rs/zerolog/issues/22#issuecomment-1127295489
+func (h LineInfoHook) Run(e *zerolog.Event, l zerolog.Level, msg string) {
+	_, file, line, ok := runtime.Caller(3)
+	if ok {
+		e.Str("line", fmt.Sprintf("%s:%d", file, line))
+	}
+}
+
 // NewLogger initializes a new logger instance.
 func NewLogger(opts ...Option) Logger {
 	options := newOptions(opts...)
@@ -119,6 +132,11 @@ func NewLogger(opts ...Option) Logger {
 		Timestamp().
 		Logger().Level(logLevel)
 
+	if logLevel <= zerolog.InfoLevel {
+		var lineInfoHook LineInfoHook
+		logger = logger.Hook(lineInfoHook)
+	}
+
 	return Logger{
 		logger,
 	}