add a basic leveled logger

Date and terminal colors are off by default.

1 files changed, 21 insertions, 0 deletions

diff --git a/pkg/log/log_test.go b/pkg/log/log_test.go
new file mode 100644
index 0000000..9f4076d
--- /dev/null
+++ b/pkg/log/log_test.go
@@ -0,0 +1,21 @@
+package log
+
+import (
+	"os"
+)
+
+func Example() {
+	SetOutput(os.Stdout)
+	SetLevel(WarningLevel)
+	SetDate(false)
+	SetColor(false)
+
+	Debug("some debug number: %d\n", 10)
+	Info("some info number: %d\n", 20)
+	Warning("some warning number: %d\n", 30)
+	Error("some error number: %d\n", 40)
+
+	// Output:
+	// [WARN] some warning number: 30
+	// [ERRO] some error number: 40
+}