merge.mergestate: add support for persisting a custom merge driver
A 'merge driver' is a coordinator for the overall merge process. It will be
able to control:
- tools for individual files, much like the merge-patterns configuration does
today
- tools that can work across groups of files
- the ordering of file resolution
- resolution of automatically generated files
- adding and removing additional files to and from the dirstate
Since it is a critical part of the merge process, it really is part of the
merge state.
This is a lowercase character (i.e. optional) because ignoring this is fine for
older versions of Mercurial -- however, if there are any files that are
specially treated by the driver, we should abort. That will happen in upcoming
patches.
There is a potential security issue with storing the merge driver in the merge
state. See the inline comments for more details.
#!/usr/bin/env python
#
# An example hgweb CGI script, edit as necessary
# See also https://mercurial-scm.org/wiki/PublishingRepositories
# Path to repo or hgweb config to serve (see 'hg help hgweb')
config = "/path/to/repo/or/config"
# Uncomment and adjust if Mercurial is not installed system-wide
# (consult "installed modules" path from 'hg debuginstall'):
#import sys; sys.path.insert(0, "/path/to/python/lib")
# Uncomment to send python tracebacks to the browser if an error occurs:
#import cgitb; cgitb.enable()
from mercurial import demandimport; demandimport.enable()
from mercurial.hgweb import hgweb, wsgicgi
application = hgweb(config)
wsgicgi.launch(application)