context: move reuse of context object to repo.__getitem__ (API)
As an example of how weird the basectx.__new__ is: whenever you create
a workingctx, basectx.__new__ gets called first. Since our __new__ has
a "changeid" argument as second parameter, when create the
workingctx(repo, text="blah"), the text gets bound to
"changeid". Since a string isn't a basectx, our __new__ ends up not
doing anything funny, but that's still very confusing code.
Another case is metadataonlyctx.__new__(), which I think exists in
order to prevent metadataonlyctx.__init__'s third argument
(originalctx) from being interpreted as a changeid in
basectx.__new__(), thereby getting reused.
Let's move this to repo.__getitem__ instead, where it will be pretty
obvious what the code does.
After this patch, changectx(ctx) will be an error (it will fail when
trying to see if it's a 20-byte string).
Differential Revision: https://phab.mercurial-scm.org/D2969
#!/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)