mercurial exit codes

[Greg Ward]

On Fri, Jun 5, 2009 at 8:22 AM, <mail at fabiantriefenbach.de> wrote:
> 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?

Unfortunately, this appears to be a bit haphazard and undisciplined.
And undocumented AFAIK.  Have you searched the wiki?  You might do the
community a service and create a wiki page to document this stuff.
The best source of information is the souce code:
mercurial/commands.py.  The exit status of a command "hg foo" is the
return value of function foo() in that module.

(I believe a function with no return value ends up with an exit status
of 0.  Arguably such command functions should be fixed to explicitly
"return 0".)

Greg