review fixes

irc/utils/os.go

@@ -0,0 +1,31 @@
+// Copyright (c) 2018 Shivaram Lingamneni
+
+package utils
+
+import (
+	"io"
+	"os"
+)
+
+// implementation of `cp` (go should really provide this...)
+func CopyFile(src string, dst string) (err error) {
+	in, err := os.Open(src)
+	if err != nil {
+		return
+	}
+	defer in.Close()
+	out, err := os.Create(dst)
+	if err != nil {
+		return
+	}
+	defer func() {
+		closeError := out.Close()
+		if err == nil {
+			err = closeError
+		}
+	}()
+	if _, err = io.Copy(out, in); err != nil {
+		return
+	}
+	return
+}