hgweb: fallback to checking wsgireq.env for REPO_NAME for 3rd party hosting
Starting with d7fd203e36cc, SCM Manager began to 404 any repository access.
What's happening is that it is generating a python script that creates an hgweb
application (not hgwebdir), and launches hgweb via wsgicgi. It must be setting
REPO_NAME in the process environment before launching this script, which gets
picked up and put into wsgireq.env when wsgicgi launches the hgweb application.
>From there, other variables (notably 'apppath' and 'dispatchpath') are
constructed differently.
d7fd203e36cc^ (working):
apppath: /hg/eng/devsetup
dispatchpath:
pathinfo: /eng/devsetup
reponame: eng/devsetup
d7fd203e36cc:
apppath: /hg
dispatchpath: eng/devsetup
pathinfo: /eng/devsetup
reponame: None
REPO_NAME: eng/devsetup
Rather than having an existing installation break when Mercurial is upgraded,
just resume checking the environment. I have no idea how many other hosting
solutions would break without restoring this.
# An example WSGI for use with mod_wsgi, edit as necessary
# See https://mercurial-scm.org/wiki/modwsgi for more information
# 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()
# enable demandloading to reduce startup time
from mercurial import demandimport; demandimport.enable()
from mercurial.hgweb import hgweb
application = hgweb(config)