Patch to make bash completions work on Macs

kubectl.path

diff --git a/contrib/completions/bash/kubectl b/contrib/completions/bash/kubectl
index c096937..8bc3410 100644
--- a/contrib/completions/bash/kubectl
+++ b/contrib/completions/bash/kubectl
@@ -1,5 +1,10 @@
 #!/bin/bash
 
+__my_init_completion()
+{
+    COMPREPLY=()
+    _get_comp_words_by_ref cur prev words cword
+}
 
 __debug()
 {
@@ -1180,7 +1185,11 @@ _kubectl()
 __start_kubectl()
 {
     local cur prev words cword
-    _init_completion -s || return
+    if declare -F _init_completions >/dev/null 2>&1; then
+        _init_completion
+    else
+        __my_init_completion
+    fi
 
     local c=0
     local flags=()