From d5efa8728846e1866fdfd4d9f3d1c0d877a9a821 Mon Sep 17 00:00:00 2001
From: Jarrod Johnson <jjohnson2@lenovo.com>
Date: Thu, 12 Oct 2017 14:15:36 -0400
Subject: [PATCH] Add history to the dbg cli helper

As long as we are adding readline, history persistence is also really
handy.
---
 confluent_server/dbgtools/confluentdbgcli.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/confluent_server/dbgtools/confluentdbgcli.py b/confluent_server/dbgtools/confluentdbgcli.py
index 04ba8783..94c1ab82 100644
--- a/confluent_server/dbgtools/confluentdbgcli.py
+++ b/confluent_server/dbgtools/confluentdbgcli.py
@@ -19,12 +19,28 @@
 # Note that this script has a high chance of breaking confluent, so
 # do not be surprised if confluent crashes as you exit...
 
+import atexit
+import os
 import select
 import socket
 import readline
 import sys
 import threading
 
+historypath = os.path.expanduser("~/.confluentdbghistory")
+
+def save_history():
+    import readline
+    try:
+        readline.write_history_file(historypath)
+    except:
+        pass
+
+if os.path.exists(historypath):
+    readline.set_history_length(1000)
+    readline.read_history_file(historypath)
+
+atexit.register(save_history)
 readline.parse_and_bind('tab: complete')
 conn = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
 conn.connect('/var/run/confluent/dbg.sock')