funcr: Add LogInfoLevel Option to skip logging level in the info log

funcr/funcr.go

@@ -100,6 +100,10 @@ type Options struct {
 	// details, see docs for Go's time.Layout.
 	TimestampFormat string
 
+	// LogInfoLevel tells func what key to use to log the integer level. By default,
+	// a "level" key will be used. If set it to "", the integer level will not be logged.
+	LogInfoLevel *string
+
 	// Verbosity tells funcr which V logs to produce.  Higher values enable
 	// more logs.  Info logs at or below this level will be written, while logs
 	// above this level will be discarded.
@@ -740,7 +744,16 @@ func (f Formatter) FormatInfo(level int, msg string, kvList []any) (prefix, args
 	if policy := f.opts.LogCaller; policy == All || policy == Info {
 		args = append(args, "caller", f.caller())
 	}
-	args = append(args, "level", level, "msg", msg)
+	if f.opts.LogInfoLevel == nil {
+		args = append(args, "level", level, "msg", msg)
+	} else {
+		lvKey := *f.opts.LogInfoLevel
+		if lvKey != "" {
+			args = append(args, lvKey, level, "msg", msg)
+		} else {
+			args = append(args, "msg", msg)
+		}
+	}
 	return prefix, f.render(args, kvList)
 }
 

funcr/funcr_test.go

@@ -1361,3 +1361,35 @@ func TestOptionsTimestampFormat(t *testing.T) {
 		t.Errorf("\nexpected %q\n     got %q", expect, capt.log)
 	}
 }
+
+func TestOptionsLogInfoLevel(t *testing.T) {
+	testCases := []struct {
+		name   string
+		level  string
+		expect string
+	}{
+		{
+			name:   "custom key",
+			level:  "info_level",
+			expect: `"info_level"=0 "msg"="msg"`,
+		},
+		{
+			name:   "no level",
+			level:  "",
+			expect: `"msg"="msg"`,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run("Run: "+tc.name, func(t *testing.T) {
+			capt := &capture{}
+			sink := newSink(capt.Func, NewFormatter(Options{LogInfoLevel: &tc.level}))
+			dSink, _ := sink.(logr.CallDepthLogSink)
+			sink = dSink.WithCallDepth(1)
+			sink.Info(0, "msg")
+			if capt.log != tc.expect {
+				t.Errorf("\nexpected %q\n     got %q", tc.expect, capt.log)
+			}
+		})
+	}
+}