Adding feature flags

pkg/featureflags/featureflag.go

@@ -0,0 +1,30 @@
+package featureflags
+
+import (
+	"sync"
+)
+
+var features = make(map[string]bool)
+var lock = &sync.RWMutex{}
+
+// Get feature will return true if the feature is enabled, otherwise false
+func Get(feature string) bool {
+	lock.RLock()
+	defer lock.RUnlock()
+	res := features[feature]
+	return res
+}
+
+// Enable a feature
+func Enable(feature string) {
+	lock.Lock()
+	defer lock.Unlock()
+	features[feature] = true
+}
+
+// Disable a feature
+func Disable(feature string) {
+	lock.Lock()
+	defer lock.Unlock()
+	features[feature] = false
+}

pkg/featureflags/featureflag_test.go

@@ -0,0 +1,22 @@
+package featureflags
+
+import (
+	"testing"
+)
+
+func TestFeatureFlag(t *testing.T) {
+	foo := Get("foo")
+	if foo {
+		t.Fail()
+	}
+	Enable("foo")
+	foo = Get("foo")
+	if !foo {
+		t.Fail()
+	}
+	Disable("foo")
+	foo = Get("foo")
+	if foo {
+		t.Fail()
+	}
+}

pkg/featureflags/features.go

@@ -0,0 +1,6 @@
+package featureflags
+
+const (
+	// MultipartPutObject ...
+	MultipartPutObject = "minio.multipart_put_object"
+)