annotate hgweb.cgi @ 36897:d7fd203e36cc

hgweb: refactor repository name URL parsing

The hgwebdir WSGI application detects when a requested URL is for
a known repository and it effectively forwards the request to the
hgweb WSGI application.

The hgweb WSGI application needs to route the request based on the
base URL for the repository. The way this normally works is
SCRIPT_NAME is used to resolve the base URL and PATH_INFO
contains the path after the script.

But with hgwebdir, SCRIPT_NAME refers to hgwebdir, not the base
URL for the repository. So, there was a hacky REPO_NAME environment
variable being set to convey the part of the URL that represented
the repository so hgweb could ignore this path component for
routing purposes.

The use of the environment variable for passing internal state
is pretty hacky. Plus, it wasn't clear from the perspective of
the URL parsing code what was going on.

This commit improves matters by making the repository name an
explicit argument to the request parser. The logic around
handling of this value has been shored up. We add various checks
that the argument is used properly - that the repository name
does represent the prefix of the PATH_INFO.

Differential Revision: https://phab.mercurial-scm.org/D2819

#!/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)