mercurial exit codes

[mail at fabiantriefenbach.de]

Hello,

can I find a documentation of the hg commands and their return values?
I'm writing a lot batchfiles to automate a workflow on windows and
would like to use the %errorlevel% variable after calling hg commands.
But I'm a bit confused which values to expect. So, maybe youcan help me
out which commands return a value and under which conditions? Do you
return more than just an error/no error information?

just an example: When I pull, I would like to check:

- if error (i.e. no repo found etc) -> stop batch
- if no changes are found -> inform user
- if everything worked fine -> just go on

hopefully someone can provide a list with the values , thanks