From 5d77a9a3d362f15a6a7d787a5d331ea2d956c7e6 Mon Sep 17 00:00:00 2001
From: sneak <sneak@sneak.berlin>
Date: Mon, 21 Sep 2020 14:53:35 -0700
Subject: [PATCH] add file copy function

---
 util.go | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/util.go b/util.go
index 5d781c7..d58bcc8 100644
--- a/util.go
+++ b/util.go
@@ -2,6 +2,7 @@ package goutil
 
 import (
 	"errors"
+	"io"
 	"math"
 	"os"
 	"regexp"
@@ -43,3 +44,28 @@ func Mkdirp(p string) error {
 	}
 	return nil
 }
+
+// straight outta stackoverflow
+// https://stackoverflow.com/questions/21060945/simple-way-to-copy-a-file-in-golang
+func CopyFile(src, 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() {
+		cerr := out.Close()
+		if err == nil {
+			err = cerr
+		}
+	}()
+	if _, err = io.Copy(out, in); err != nil {
+		return
+	}
+	err = out.Sync()
+	return
+}