Initial v1.0.0 commit

vendor/github.com/markbates/oncer/deprecate.go

@@ -0,0 +1,20 @@
+package oncer
+
+import (
+	"fmt"
+	"io"
+	"os"
+)
+
+const deprecated = "DEPRECATED"
+
+var deprecationWriter io.Writer = os.Stdout
+
+func Deprecate(depth int, name string, msg string) {
+	Do(deprecated+name, func() {
+		fmt.Fprintf(deprecationWriter, "[%s] %s has been deprecated.\n", deprecated, name)
+		if len(msg) > 0 {
+			fmt.Fprintf(deprecationWriter, "\t%s\n", msg)
+		}
+	})
+}