Re: [Fab-user] order control

[Morgan Goose]

I wasn't saying you had duplicates, but fabric uses the set type to remove
duplicates in host lists. It does this when it combines hosts and roles on a
function to run, so there isn't a guarantee of order for hosts.

Here's where that is happening
http://github.com/bitprophet/fabric/blob/put-get-overhaul/fabric/main.py#L364

And if you're unfamiliar with set:
http://docs.python.org/tutorial/datastructures.html#sets

now to get your hosts to run in a specific order is going to be tougher. I
think you'd need to split the body of the task into another function foo and do
something like this:


def putfile():
    for host in env.hosts:
        env.host = env,hoststring = host
        foo()

But I haven't tried that, so i might be wrong.

goose

On Thu, Oct 14, 2010 at 09:43:51AM -0400, Jeff Honey wrote:
> <snip>
> from fabric.api import *
> 
> env.hosts = ['foo1.com', 'foo2.com', 'foo3.com', 'foo4.com', 'foo5.com', 
> 'foo6.com']
> 
> def putfile():
>  put(r'c:\blah.txt', '/tmp/')
>  run('touch /tmp/blah.txt')
> </snip>
> 
> I checked and double-checked that there were no dupes in my list. Previously 
> it was using this:
> 
> <snip>
> from fabric.api import *
> 
> env.roledefs = {
>     'servers': ['foo1.com', 'foo2.com', 'foo3.com', 'foo4.com', 'foo5.com', 
> 'foo6.com'],
>     }
> 
> @roles('servers')
> def putfile():
>  put(r'c:\blah.txt', '/tmp/')
>  run('touch /tmp/blah.txt')
> </snip>
> 
> ...the behaviour I was expecting was for the function 'pufile()' to happen on 
> foo1.com first and then go through the rest of the list in order.
> --
>  ¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
> ¤ kyoboku kazeoshi ¤
>  ¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
> ________________________________________
> From: Morgan Goose address@hidden
> Sent: Thursday, October 14, 2010 9:26
> To: Jeff Honey
> Subject: Re: [Fab-user] order control
> 
> If I recall the hosts all get sent through a set() conversion to remove
> duplicates, that would make the order undefined. Do you have an example 
> fabfile
> we can look at?
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