Node specific overlay and templating now functioning with other minor fixups

internal/pkg/util/util.go

@@ -2,40 +2,44 @@
 package util
 
 import (
-    "bufio"
-    "fmt"
+    "io"
+    "math/rand"
     "os"
-    "strings"
+
+    //   "strings"
 )
 
-func FileCopyReplace(sourceFile string, destFile string, replace map[string]string) error{
 
-    sourceFD, err := os.Open(sourceFile)
-    if err != nil {
-        return err
+func RandomString(n int) string {
+    var letter = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
+
+    b := make([]rune, n)
+    for i := range b {
+        b[i] = letter[rand.Intn(len(letter))]
     }
-
-    destFD, err := os.Create(destFile)
-    if err != nil {
-        return err
-    }
-    defer sourceFD.Close()
-    defer destFD.Close()
-
-    scanner := bufio.NewScanner(sourceFD)
-    w := bufio.NewWriter(destFD)
-
-    for scanner.Scan() {
-        newLine := scanner.Text()
-        for k, v := range replace {
-            replaceString := fmt.Sprintf("@{%s}", strings.ToUpper(k))
-            newLine = strings.Replace(newLine, replaceString, v, -1)
-
-        }
-        w.WriteString(newLine + "\n")
-
-    }
-
-    return w.Flush()
+    return string(b)
 }
 
+
+func CopyFile(source string, dest string) error {
+    sourceFD, err := os.Open(source)
+    if err != nil {
+        return err
+    }
+
+    finfo, err := sourceFD.Stat()
+
+    destFD, err := os.OpenFile(dest, os.O_RDWR|os.O_CREATE, finfo.Mode())
+    if err != nil {
+        return err
+    }
+
+    _, err = io.Copy(destFD, sourceFD)
+    if err != nil {
+        return err
+    }
+    sourceFD.Close()
+    destFD.Close()
+
+    return nil
+}