Added arn to the main repository

arn/osutils/osutils.go

@@ -0,0 +1,20 @@
+package osutils
+
+import (
+	"os"
+)
+
+// Exists tells you whether the given file or directory exists.
+func Exists(filePath string) bool {
+	_, err := os.Stat(filePath)
+	return !os.IsNotExist(err)
+}
+
+// // WaitExists will wait until the given file path exists.
+// func WaitExists(filePath string, timeout time.Duration, pollingInterval time.Duration) {
+// 	start := time.Now()
+
+// 	for !Exists(filePath) && time.Since(start) < timeout {
+// 		time.Sleep(pollingInterval)
+// 	}
+// }