Colloborating via NFS vs. umask

[Georg Sauthoff]

Bryan O'Sullivan <bos at serpentine.com> wrote:
> Georg Sauthoff wrote:

>> How do you work in NFS-based environments with mercurial?

> Don't.  Use HTTP or ssh instead.  NFS gives terrible performance, and
> its file locking and caching semantics are not trustworthy.  (Maybe they
> are in principle, but in practice it's never been hard to find different
> operating systems with interop bugs.)  Just don't go there.

ok - I have to look into the http-setup then. But I fear that the
user management is a bit complicated (because we don't have
kerberos available, and the co-devs don't appreciate to learn new
passwords etc.).

Is it possible to directly clone a local repository to
http-destination (if the user has enough priveleges)?

Btw, yesterday I hacked a umask extension for Mercurial ;).
Basically you can specify via
[umask]
umask = 007
a specific umask for mercurial, or if this is not present,
mercurial chooses a umask depending on the permissions of the
parent directory.

# cat umask.py
import mercurial.repo
import mercurial.hg

import os
import os.path
from stat import *

_umask = os.umask(0)
os.umask(_umask)

def umask_from_parent(p):
  s = os.path.split(p)
  r = os.stat(os.path.normpath(s[0]))
  mode = r[ST_MODE] & (S_IRWXU | S_IRWXG | S_IRWXO)
  new_umask = mode ^ 0777
  os.umask(new_umask)

def localpath(path):
  if path.startswith('file://'):
    return path[7:]
  if path.startswith('file:'):
    return path[5:]
  return path

def my_clone(ui, source, dest=None, pull=False, rev=None, update=True,
              stream=False):
  mask = ui.config('umask', 'umask')
  if mask == None:
    d = localpath(dest)
    d = os.path.normpath(d)
    try:
      umask_from_parent(d)
    except:
      ui.debug('umask: non-local destination. Doing nothing.')
  else:
    os.umask(int('0'+mask))
  orig_clone(ui, source, dest, pull, rev, update, stream)

orig_clone = mercurial.hg.clone
mercurial.hg.clone = my_clone

def reposetup(ui, repo):
  ui.debug('umask: repo.url(): %s' % repo.url())
  if not repo.local():
            return
  mask = ui.config('umask', 'umask')
  if mask == None:
    p = repo.url()[5:]
    umask_from_parent(p)
  else:
    os.umask(int('0'+mask))

Best regards
Georg Sauthoff
-- 
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Fortune : 'Real programmers don't comment their code.
           It was hard to write, it should be hard to understand.' ;)