Re: [PATCH 1/1] Allow to fallback to xdrlib if xdrlib3 not available

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Hi Jeff,

> On Wed, 2025-02-12 at 14:23 +0100, Petr Vorel wrote:
> > On certain environments it might be difficult to install xdrlib3 via pip
> > (e.g. python 3.11, which is a default on current Tumbleweed).


> I did a "pip install xdrlib3" on Fedora 33 just now, and it has python
> 3.9. What's the problem you're seeing with SuSE installing it with
> v3.11?

Yesterday I did not notice missing ply, I saw only missing xdrgen
(xdr/xdrgen.py). Therefore I thought that virtualenv is mangling PYTHONPATH.
Obviously installing ply with pip would be enough.

I also thing using a fallback saves the need to use virtualenv on old distros,
therefore I would prefer this patch to be accepted. If it's not accepted, it
might be worth to extend info about dependencies.

Kind regards,
Petr

$ python3 --version
Python 3.11.11

# pip install xdrlib3

[notice] A new release of pip is available: 24.3.1 -> 25.0.1
[notice] To update, run: pip install --upgrade pip
error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try
    zypper install python311-xyz, where xyz is the package
    you are trying to install.
...

=> let's use virtualenv

# python3 -m virtualenv .venv && . .venv/bin/activate
created virtual environment CPython3.11.11.final.0-64 in 1466ms
  creator CPython3Posix(dest=/root/pynfs/.venv, clear=False, no_vcs_ignore=False, global=False)
  seeder FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/root/.local/share/virtualenv)
    added seed packages: pip==24.3.1, setuptools==75.8.0, wheel==0.45.1, xdrlib3==0.1.1
  activators BashActivator,CShellActivator,FishActivator,NushellActivator,PowerShellActivator,PythonActivator

# pip install xdrlib3
Requirement already satisfied: xdrlib3 in ./.venv/lib/python3.11/site-packages (0.1.1)

# ./setup.py build
Moving to xdr


Moving to rpc
Traceback (most recent call last):
  File "/root/pynfs/rpc/./setup.py", line 15, in <module>
    import xdrgen
ModuleNotFoundError: No module named 'xdrgen'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/root/pynfs/rpc/./setup.py", line 18, in <module>
    import xdrgen
  File "/root/pynfs/xdr/xdrgen.py", line 235, in <module>
    import ply.lex as lex
ModuleNotFoundError: No module named 'ply'

Moving to nfs4.1
Traceback (most recent call last):
  File "/root/pynfs/nfs4.1/./setup.py", line 15, in <module>
    import xdrgen
ModuleNotFoundError: No module named 'xdrgen'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/root/pynfs/nfs4.1/./setup.py", line 18, in <module>
    import xdrgen
  File "/root/pynfs/xdr/xdrgen.py", line 235, in <module>
    import ply.lex as lex
ModuleNotFoundError: No module named 'ply'

Moving to nfs4.0
/root/pynfs/nfs4.0/./setup.py:7: DeprecationWarning: dep_util is Deprecated. Use functions from setuptools instead.
  from distutils.dep_util import newer_group
Traceback (most recent call last):
  File "/root/pynfs/nfs4.0/./setup.py", line 11, in <module>
    import xdrgen
ModuleNotFoundError: No module named 'xdrgen'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/root/pynfs/nfs4.0/./setup.py", line 14, in <module>
    import xdrgen
  File "/root/pynfs/xdr/xdrgen.py", line 235, in <module>
    import ply.lex as lex
ModuleNotFoundError: No module named 'ply'

# pip install ply # this fixes it

> BTW, does SuSE have the xdrlib3 module available as a package?

> > Fixes: dfb0b07 ("Move to xdrlib3")
> > Suggested-by: Michael Moese <mmoese@xxxxxxxx>
> > Signed-off-by: Petr Vorel <pvorel@xxxxxxx>
> > ---
> > Hi,

> > I admit it would be safer to check if python is really < 3.13.

> > Kind regards,
> > Petr

> >  README                                | 2 ++
> >  nfs4.0/lib/rpc/rpc.py                 | 6 +++++-
> >  nfs4.0/lib/rpc/rpcsec/sec_auth_sys.py | 7 ++++++-
> >  nfs4.0/nfs4lib.py                     | 6 +++++-
> >  nfs4.0/nfs4server.py                  | 6 +++++-
> >  rpc/security.py                       | 6 +++++-
> >  xdr/xdrgen.py                         | 9 +++++++--
> >  7 files changed, 35 insertions(+), 7 deletions(-)

> > diff --git a/README b/README
> > index 8c3ac27..d5214b4 100644
> > --- a/README
> > +++ b/README
> > @@ -19,6 +19,8 @@ python3-standard-xdrlib) or you may install it via pip:

> >  	pip install xdrlib3

> > +If xdrlib3 is not available fallback to old xdrlib (useful for python < 3.13).
> > +
> >  You can prepare both versions for use with

> >  	./setup.py build
> > diff --git a/nfs4.0/lib/rpc/rpc.py b/nfs4.0/lib/rpc/rpc.py
> > index 4751790..7a80241 100644
> > --- a/nfs4.0/lib/rpc/rpc.py
> > +++ b/nfs4.0/lib/rpc/rpc.py
> > @@ -9,12 +9,16 @@

> >  from __future__ import absolute_import
> >  import struct
> > -import xdrlib3 as xdrlib
> >  import socket
> >  import select
> >  import threading
> >  import errno

> > +try:
> > +    import xdrlib3 as xdrlib
> > +except:
> > +    import xdrlib
> > +
> >  from rpc.rpc_const import *
> >  from rpc.rpc_type import *
> >  import rpc.rpc_pack as rpc_pack
> > diff --git a/nfs4.0/lib/rpc/rpcsec/sec_auth_sys.py b/nfs4.0/lib/rpc/rpcsec/sec_auth_sys.py
> > index 2581a1e..41c6d54 100644
> > --- a/nfs4.0/lib/rpc/rpcsec/sec_auth_sys.py
> > +++ b/nfs4.0/lib/rpc/rpcsec/sec_auth_sys.py
> > @@ -1,7 +1,12 @@
> >  from .base import SecFlavor, SecError
> >  from rpc.rpc_const import AUTH_SYS
> >  from rpc.rpc_type import opaque_auth
> > -from xdrlib3 import Packer, Error
> > +import struct
> > +
> > +try:
> > +    from xdrlib3 import Packer, Error
> > +except:
> > +    from xdrlib import Packer, Error

> >  class SecAuthSys(SecFlavor):
> >      # XXX need better defaults
> > diff --git a/nfs4.0/nfs4lib.py b/nfs4.0/nfs4lib.py
> > index 2337d8c..92b3c11 100644
> > --- a/nfs4.0/nfs4lib.py
> > +++ b/nfs4.0/nfs4lib.py
> > @@ -41,9 +41,13 @@ import xdrdef.nfs4_const as nfs4_const
> >  from  xdrdef.nfs4_const import *
> >  import xdrdef.nfs4_type as nfs4_type
> >  from xdrdef.nfs4_type import *
> > -from xdrlib3 import Error as XDRError
> >  import xdrdef.nfs4_pack as nfs4_pack

> > +try:
> > +    from xdrlib3 import Error as XDRError
> > +except:
> > +    from xdrlib import Error as XDRError
> > +
> >  import nfs_ops
> >  op4 = nfs_ops.NFS4ops()

> > diff --git a/nfs4.0/nfs4server.py b/nfs4.0/nfs4server.py
> > index 10bf28e..e26cecd 100755
> > --- a/nfs4.0/nfs4server.py
> > +++ b/nfs4.0/nfs4server.py
> > @@ -34,7 +34,11 @@ import time, StringIO, random, traceback, codecs
> >  import StringIO
> >  import nfs4state
> >  from nfs4state import NFS4Error, printverf
> > -from xdrlib3 import Error as XDRError
> > +
> > +try:
> > +    from xdrlib3 import Error as XDRError
> > +except:
> > +    from xdrlib import Error as XDRError

> >  unacceptable_names = [ "", ".", ".." ]
> >  unacceptable_characters = [ "/", "~", "#", ]
> > diff --git a/rpc/security.py b/rpc/security.py
> > index 789280c..79e746b 100644
> > --- a/rpc/security.py
> > +++ b/rpc/security.py
> > @@ -3,7 +3,6 @@ from .rpc_const import AUTH_NONE, AUTH_SYS, RPCSEC_GSS, SUCCESS, CALL, \
> >  from .rpc_type import opaque_auth, authsys_parms
> >  from .rpc_pack import RPCPacker, RPCUnpacker
> >  from .gss_pack import GSSPacker, GSSUnpacker
> > -from xdrlib3 import Packer, Unpacker
> >  from . import rpclib
> >  from .gss_const import *
> >  from . import gss_type
> > @@ -17,6 +16,11 @@ except ImportError:
> >  import threading
> >  import logging

> > +try:
> > +    from xdrlib3 import Packer, Unpacker
> > +except:
> > +    from xdrlib import Packer, Unpacker
> > +
> >  log_gss = logging.getLogger("rpc.sec.gss")
> >  log_gss.setLevel(logging.INFO)

> > diff --git a/xdr/xdrgen.py b/xdr/xdrgen.py
> > index f802ba8..970ae9d 100755
> > --- a/xdr/xdrgen.py
> > +++ b/xdr/xdrgen.py
> > @@ -1357,8 +1357,13 @@ pack_header = """\
> >  import sys,os
> >  from . import %s as const
> >  from . import %s as types
> > -import xdrlib3 as xdrlib
> > -from xdrlib3 import Error as XDRError
> > +
> > +try:
> > +    import xdrlib3 as xdrlib
> > +    from xdrlib3 import Error as XDRError
> > +except:
> > +    import xdrlib as xdrlib
> > +    from xdrlib import Error as XDRError

> >  class nullclass(object):
> >      pass

> Acked-by: Jeff Layton <jlayton@xxxxxxxxxx>




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