Nir Soffer has posted comments on this change.

Change subject: utils: Correct and faster list2cmdline
......................................................................


Patch Set 7:

(1 comment)

http://gerrit.ovirt.org/#/c/27548/7/lib/vdsm/utils.py
File lib/vdsm/utils.py:

Line 731: 
Line 732:     if not printable:
Line 733:         printable = command
Line 734: 
Line 735:     execCmdLogger.debug("%s (cwd %s)", _list2cmdline(printable), cwd)
> Even though the new function is a significant improvement I suggest we add:
Sure we can, but using this all over the code is little ugly.

How about something more general that we can reuse a lot:

    class LazyString(object):
    
        __slots__ = ("func", "args", "kwargs")

        def __init__(self, func, *args, **kwargs):
            self.func = func
            self.args = args
            self.kwargs = kwargs

        def __str__(self):
            return self.func(*args, **kwargs)

So now this becomes:

    cmdline = LazyString(_list2cmdline, printable)
    execCmdLogger.debug("%s (cwd %s)", cmdline, cwd)

Not sure about the LazyString, just the first name that I could think about.
Line 736: 
Line 737:     p = CPopen(command, close_fds=True, cwd=cwd, env=env,
Line 738:                deathSignal=deathSignal, childUmask=childUmask)
Line 739:     if not sync:


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Gerrit-MessageType: comment
Gerrit-Change-Id: Ibfc7819c126fe51cc068cc6f9f85b1002878385b
Gerrit-PatchSet: 7
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Nir Soffer <[email protected]>
Gerrit-Reviewer: Adam Litke <[email protected]>
Gerrit-Reviewer: Allon Mureinik <[email protected]>
Gerrit-Reviewer: Dan Kenigsberg <[email protected]>
Gerrit-Reviewer: Federico Simoncelli <[email protected]>
Gerrit-Reviewer: Nir Soffer <[email protected]>
Gerrit-Reviewer: Saggi Mizrahi <[email protected]>
Gerrit-Reviewer: Yaniv Bronhaim <[email protected]>
Gerrit-Reviewer: [email protected]
Gerrit-Reviewer: oVirt Jenkins CI Server
Gerrit-HasComments: Yes
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