RE: cvs diff within verifymsg

[Jones, Larry]

Use cvs -n diff.

-Larry Jones

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Ryan Thompson
Sent: Monday, June 17, 2013 8:50 PM
To: address@hidden
Subject: cvs diff within verifymsg

Hello,

I have a verifymsg script that runs the changed source code hunks through a 
series of checks, exiting with an error if any of those checks fail. In order 
to determine what has been changed, the verifymsg script runs "cvs diff" 
(without any filename arguments) and parses that output.

I'm aware that locking is already enabled by the time verifymsg is run. 
However, if a plain "cvs commit" or "cvs commit -m 'message'" is run, the diff 
works fine without any errors or warnings. If instead "cvs commit file.c" is 
run (even if file.c was the same file that would have been implicitly checked 
in by the plain "cvs commit"), the whole thing deadlocks with the usual message:

     cvs diff: [00:32:20] waiting for username's lock in /path/to/repo/module

I'm not surprised by this, but I am surprised that it works when no explicit 
filenames are given to commit.

More to the point, how can I circumvent the locking for this use case so I can 
get cvs diff output in verifymsg?

Thanks,
- R