Ah, good to hear.
In hindsight, I didn't mean to make the custom environment method sound
overly difficult Ben... I've just had a lot of issues spawning unrelated
processes from within each other, particularly when Python and things like
LD_PRELOAD get involved.
-Nathan
-----Original Message-----
From: Dennis Serras
Sent: Thursday, September 19, 2013 4:18 PM
To: Nuke Python discussion
Subject: RE: [Nuke-python] Launch a totally new Nuke process... From
insideNuke
Geniuses! Thanks, as always, Ben and Nathan. Got it working.
den serras
@ stereoD
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Nathan
Rusch
Sent: Wednesday, September 18, 2013 7:44 PM
To: Nuke Python discussion
Subject: Re: [Nuke-python] Launch a totally new Nuke process... From
insideNuke
Yeah, that's a possibility as well, but then you're left in a tough spot:
You have to either A) start from the running process' environment and
sanitize it down to something generic *enough*, or B) build up a new
environment from scratch. Neither approach is great, but I suppose if you
know which environment variables you'll be needing to set, you could pop
them out of a copy of os.environ and then pass that to your subprocess.
Or, if you wanted to try building one up from scratch, you could probably
inspect the registry to get all of the system- and user-level variables that
would be set in a default shell environment, or just make some assumptions
and set or copy specific values from the current process' environment.
-Nathan
-----Original Message-----
From: Ben Dickson
Sent: Wednesday, September 18, 2013 7:17 PM
To: Nuke Python discussion
Subject: Re: [Nuke-python] Launch a totally new Nuke process... From
insideNuke
Windows might be slightly different in this regard, but on OS X/Linux the
environment variables like NUKE_PATH will be inherited by the child process.
To start the process in a clean environment, you would do this:
subprocess.Popen(args, env={})
or:
subprocess.Popen(args, env={
'CONFIG_THING': os.getenv("CONFIG_THING"), ...})
On 19/09/13 11:39, Dennis Serras wrote:
Unfortunately, that still doesn't work - it still considers the
packages loaded in the initial Nuke install to be loaded already, so
won't load different packages. What I need is for it to behave as if I
created a totally new console and typed in the launch commands; even
though this creates a new CMD window, it behaves as if it were an
extension of the same cmd that launched Nuke initially. Maybe I need a
different approach...
*den serras *
@ stereoD
*From:*[email protected]
[mailto:[email protected]] *On Behalf Of
*Nathan Rusch
*Sent:* Tuesday, September 17, 2013 9:38 AM
*To:* Nuke Python discussion
*Subject:* Re: [Nuke-python] Launch a totally new Nuke process... From
inside Nuke
'start' works fine with 'cmd', but it isn't an executable, so you have
to run it... through cmd again. You should be using subprocess.Popen
instead of os.system though:
args = ['cmd', '/C', 'start', 'cmd', '/K',
os.path.normpath(nuke.env['ExecutablePath'])]
if nuke.env['nukex']:
args.append('--nukex')
subprocess.Popen(args)
-Nathan
*From:*Dennis Serras <mailto:[email protected]>
*Sent:*Monday, September 16, 2013 6:38 PM
*To:*[email protected]
<mailto:[email protected]>
*Subject:*[Nuke-python] Launch a totally new Nuke process... From
inside Nuke
Having fun trying to launch Nuke from Nuke. We have a custom Windows
command line launch system that handles all the packages, versions,
licensing, etc.; it's based on subprocess.Popen. I'm building a tool
that allows launching of a script with a different build and/or
package of Nuke. When I use the usual culprits (subprocess.call,
subprocess.Popen, os.popen, etc.) they all want to launch a new Nuke
in the same cmd window and with the same setup as the current one - if
I use any other setup it fails. So I figured I need to launch from a
new cmd window - so tried os.system("start cmd /K blahblah"), and
os.startfile("blahblah.bat") which created a new cmd window - but it
still has the same problem. Of course if I use cmd directly I can
launch as many different versions of Nuke as I have licenses free. Any
ideas how I can do this?
Thanks!
Den
*den serras*
@
senior technical artist | *stereo D*| deluxe 3D
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2D TD | [email protected]
rising sun pictures | www.rsp.com.au
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