Print the line number of message with lager

[qibobo]

When use lager to do logging, it print out a json format message. There is no line number where the log message was triggered. Does lager support it? Or how can I do it with lager?

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/161044023

The labels on this github issue will be updated when the story is started.

[jvshahid]

No, you can't print the file:line where the log was triggered that today. We (the diego team) usually have a message that is distinguishable enough, either by itself or because it has a session prefix to identify where it came from. I honestly haven't felt the need for file:line but I'm happy to hear your thoughts. First, I would recommend making use of Session to nest sessions and add a prefix to the log message.

[qibobo]

@jvshahid Sounds reasonable. Thank you.