Unusual return codes from hg commands

[Matt Mackall]

On Sun, May 03, 2009 at 12:48:16AM +1000, Peter Williams wrote:
> As you may or may not know, I'm the author of some GUI wrappers for 
> mercurial and mercurial queues and I've been noticing (what I think are) 
> unusual return codes from some commands when testing in unusual 
> conditions.  Namely, I'm seeing non zero return values even though the 
> command is successful albeit with a warning message.
> 
> This leads me to the idea that these return values may be coded to 
> indicate the warning level, etc.  I've been unable to find anything in 
> the mercurial source to verify this hypothesis so I thought I'd ask.
> 
> So.  Do the non zero return values from the commands have meaning and if 
> so where can I find the information to make use of them?

If you take a peek in commands.py for the command you're interested
in, you can probably find the logic that generates the return code.
Lots of these functions have no return and thus yield a 0 return on exit.

We are open to patches to normalize and document return codes that
people care about.

-- 
Mathematics is the supreme nostalgia of our time.