view hgweb.cgi @ 39495:6a53842727c1

snapshot: consider unrelated snapshots at a similar level first

This new step is inserted before considering using a level-N snapshot as a
base for a level-N+1 snapshot. We first check if existing level-N+1 snapshots
using the same base would be a suitable base for a level-N+2 snapshot.

This increases snapshot reuse and limits the risk of snapshot explosion in
very branchy repositories.

Using a "deeper" snapshot as the base also results in a smaller snapshot since
it builds a level-N+2 intermediate snapshot instead of an N+1 one.

This logic is similar for the one we added in a previous commit. In that
previous commit is only applied to level-0 "siblings".

We can see this effect in the test repository. Snapshots moved from lower
levels to higher levels.

#!/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)