view hgwebdir.cgi @ 5378:8a2915f57dfc

convert: add a mode where mercurial_sink skips empty revisions.

The getchanges function of some converter_source classes can return
some false positives.  I.e. they sometimes claim that a file "foo"
was changed in some revision, even though its contents are still the
same.

convert_svn is particularly bad, but I think this can also happen with
convert_cvs and, at least in theory, with mercurial_source.

For regular conversions this is not really a problem - as long as
getfile returns the right contents, we'll get a converted revision
with the right contents.  But when we use --filemap, this could lead
to superfluous revisions being converted.

Instead of fixing every converter_source, I decided to change
mercurial_sink to work around this problem.

When --filemap is used, we're interested only in revisions that touch
some specific files.  If a revision doesn't change any of these files,
then we're not interested in it (at least for revisions with a single
parent; merges are special).

For mercurial_sink, we abuse this property and rollback a commit if
the manifest text hasn't changed.  This avoids duplicating the logic
from localrepo.filecommit to detect unchanged files.

#!/usr/bin/env python
#
# An example CGI script to export multiple hgweb repos, edit as necessary

# adjust python path if not a system-wide install:
#import sys
#sys.path.insert(0, "/path/to/python/lib")

# enable importing on demand to reduce startup time
from mercurial import demandimport; demandimport.enable()

# send python tracebacks to the browser if an error occurs:
import cgitb
cgitb.enable()

# If you'd like to serve pages with UTF-8 instead of your default
# locale charset, you can do so by uncommenting the following lines.
# Note that this will cause your .hgrc files to be interpreted in
# UTF-8 and all your repo files to be displayed using UTF-8.
#
#import os
#os.environ["HGENCODING"] = "UTF-8"

from mercurial.hgweb.hgwebdir_mod import hgwebdir
from mercurial.hgweb.request import wsgiapplication
import mercurial.hgweb.wsgicgi as wsgicgi

# The config file looks like this.  You can have paths to individual
# repos, collections of repos in a directory tree, or both.
#
# [paths]
# virtual/path = /real/path
# virtual/path = /real/path
#
# [collections]
# /prefix/to/strip/off = /root/of/tree/full/of/repos
#
# collections example: say directory tree /foo contains repos /foo/bar,
# /foo/quux/baz.  Give this config section:
#   [collections]
#   /foo = /foo
# Then repos will list as bar and quux/baz.
#
# Alternatively you can pass a list of ('virtual/path', '/real/path') tuples
# or use a dictionary with entries like 'virtual/path': '/real/path'

def make_web_app():
    return hgwebdir("hgweb.config")

wsgicgi.launch(wsgiapplication(make_web_app))