view hgweb.cgi @ 24725:ee751d47cf2c

vfs: add walk

To eliminate "path prefix" (= "the root of vfs") part from "dirpath"
yielded by "os.walk()" correctly, "path prefix" should have "os.sep"
at the end of own string, but it isn't easy to ensure it, because:

  - examination by "path.endswith(os.sep)" isn't portable

    Some problematic encodings use 0x5c (= "os.sep" on Windows) as the
    tail byte of some multi-byte characters.

  - "os.path.join(path, '')" isn't portable

    With Python 2.7.9, this invocation doesn't add "os.sep" at the end
    of UNC path (see issue4557 for detail).

Python 2.7.9 changed also behavior of "os.path.normpath()" (see *) and
"os.path.splitdrive()" for UNC path.

    vfs root        normpath       splitdrive          os.sep required
    =============== ============== =================== ============
    z:\             z:\            z: + \              no
    z:\foo          z:\foo         z: + \foo           yes
    z:\foo\         z:\foo         z: + \foo           yes

    [before Python 2.7.9]
    \\foo\bar       \\foo\bar      '' + \\foo\bar      yes
    \\foo\bar\      \\foo\bar  (*) '' + \\foo\bar      yes
    \\foo\bar\baz   \\foo\bar\baz  '' + \\foo\bar\baz  yes
    \\foo\bar\baz\  \\foo\bar\baz  '' + \\foo\bar\baz  yes

    [Python 2.7.9]
    \\foo\bar       \\foo\bar      \\foo\bar + ''      yes
    \\foo\bar\      \\foo\bar\ (*) \\foo\bar + \       no
    \\foo\bar\baz   \\foo\bar\baz  \\foo\bar + \baz    yes
    \\foo\bar\baz\  \\foo\bar\baz  \\foo\bar + \baz    yes

If it is ensured that "normpath()"-ed vfs root is passed to
"splitdrive()", adding "os.sep" is required only when "path" part of
"splitdrive()" result isn't "os.sep" itself. This is just what
"pathutil.nameasprefix()" examines.

This patch applies "os.path.normpath()" on "self.join(None)"
explicitly, because it isn't ensured that vfs root is already
normalized: vfs itself is constructed with "realpath=False" (= avoid
normalizing in "vfs.__init__()") in many code paths.

This normalization should be much cheaper than subsequent file I/O for
directory traversal.

#!/usr/bin/env python
#
# An example hgweb CGI script, edit as necessary
# See also http://mercurial.selenic.com/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)