From 86d84e5c0a791533e5d150d3ebf1c7d3489fa39c Mon Sep 17 00:00:00 2001
From: Oleg Kalachev <okalachev@gmail.com>
Date: Mon, 19 Aug 2019 19:22:47 +0300
Subject: [PATCH] selfcheck.py: make selfcheck work if there is no systemd
 module

---
 clever/src/selfcheck.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/clever/src/selfcheck.py b/clever/src/selfcheck.py
index 57916b85..4b0b5c5e 100755
--- a/clever/src/selfcheck.py
+++ b/clever/src/selfcheck.py
@@ -16,7 +16,6 @@ import traceback
 from threading import Event
 import numpy
 import rospy
-from systemd import journal
 import tf2_ros
 import tf2_geometry_msgs
 from pymavlink import mavutil
@@ -620,6 +619,12 @@ def check_clever_service():
         failure('clever.service is not running, try sudo systemctl restart clever')
         return
 
+    try:
+        from systemd import journal
+    except ImportError:
+        failure('no python-systemd package, not the Clever image?')
+        return
+
     j = journal.Reader()
     j.this_boot()
     j.add_match(_SYSTEMD_UNIT='clever.service')