Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

How do I check if a ROS message has changed?

message

asked 2014-05-08 14:31:26 -0600

jbarry
280 ●8 ●16 ●21

Hi,

I'm trying to write a unit test that tests converting between some messages types and one of the things I'd like to do is have a test that fails if the message's .msg file has changed at all (this is because it's important that the conversion functions be updated with the changed message and I want a reminder to do so). I'd be happy to just hard code the current message MD5 sum into my test, but how do I check the MD5 sum of the message to make sure it matches?

Thanks, Jenny

edit retag flag offensive close merge delete

Comments

I'm pretty sure are ways to retrieve a message's MD5 sum through the C++ and python APIs. I'm not sure how well it's documented, so you may want to inspect the generated python or C++ files.

ahendrix ( 2014-05-08 16:44:38 -0600 )edit

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2014-05-08 23:17:29 -0600

Martin Günther

11816 ●82 ●159 ●198 https://www.dfki.de/en...

In rospy:

import roslib
roslib.load_manifest('std_msgs')
import rospy
import std_msgs.msg

print std_msgs.msg.Header._md5sum

edit flag offensive delete link

add a comment

Question Tools

1 follower

Stats

Asked: 2014-05-08 14:31:26 -0600

Seen: 683 times

Last updated: May 08 '14

How do I check if a ROS message has changed? edit

Comments

1 Answer

Question Tools

Stats

Related questions

How do I check if a ROS message has changed?