log: allow SetLevel to accept Level values

context.go

@@ -109,10 +109,16 @@ const (
 	PanicLevel Level = logrus.PanicLevel
 )
 
-// SetLevel sets log level globally. It returns an error if the given
-// level is not supported.
+// levelValue is a log level accepted by [SetLevel].
+type levelValue interface {
+	string | Level
+}
+
+// SetLevel sets the global log level.
+//
+// The level may be specified as a string or a [Level].
 //
-// level can be one of:
+// String levels are parsed using [logrus.ParseLevel] and may be one of:
 //
 //   - "trace" ([TraceLevel])
 //   - "debug" ([DebugLevel])
@@ -121,10 +127,21 @@ const (
 //   - "error" ([ErrorLevel])
 //   - "fatal" ([FatalLevel])
 //   - "panic" ([PanicLevel])
-func SetLevel(level string) error {
-	lvl, err := logrus.ParseLevel(level)
-	if err != nil {
-		return err
+//
+// SetLevel returns an error if a string level is not supported.
+func SetLevel[T levelValue](level T) error {
+	var lvl Level
+
+	switch l := any(level).(type) {
+	case string:
+		var err error
+		lvl, err = logrus.ParseLevel(l)
+		if err != nil {
+			return err
+		}
+
+	case Level:
+		lvl = l
 	}
 
 	L.Logger.SetLevel(lvl)

context_test.go

@@ -61,3 +61,69 @@ func TestCompat(t *testing.T) {
 		t.Errorf("expected: (%[1]T) %+[1]v, got: (%[2]T) %+[2]v", expected, l2.Data)
 	}
 }
+
+func TestSetLevel(t *testing.T) {
+	oldLevel := L.Logger.GetLevel()
+	t.Cleanup(func() {
+		L.Logger.SetLevel(oldLevel)
+	})
+
+	tests := []struct {
+		str   string
+		level Level
+	}{
+		{
+			str:   "trace",
+			level: TraceLevel,
+		},
+		{
+			str:   "debug",
+			level: DebugLevel,
+		},
+		{
+			str:   "info",
+			level: InfoLevel,
+		},
+		{
+			str:   "warn",
+			level: WarnLevel,
+		},
+		{
+			str:   "error",
+			level: ErrorLevel,
+		},
+		{
+			str:   "fatal",
+			level: FatalLevel,
+		},
+		{
+			str:   "panic",
+			level: PanicLevel,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.str, func(t *testing.T) {
+			inputs := []struct {
+				doc string
+				set func() error
+			}{
+				{doc: "string", set: func() error { return SetLevel(tc.str) }},
+				{doc: "Level", set: func() error { return SetLevel(tc.level) }},
+			}
+
+			for _, input := range inputs {
+				t.Run(input.doc, func(t *testing.T) {
+					L.Logger.SetLevel(InfoLevel)
+
+					if err := input.set(); err != nil {
+						t.Fatal(err)
+					}
+					if got := L.Logger.GetLevel(); got != tc.level {
+						t.Fatalf("got %v, want %v", got, tc.level)
+					}
+				})
+			}
+		})
+	}
+}