> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Gert Driesen
> Sent: Thursday, 5 August 2004 6:27 PM
> To: sridhar; [EMAIL PROTECTED]
> Subject: Re: [nant-dev] running a detached process from NAnt
>
> Guess we need to add support something similar to the "spawn"
> attribute in Ant : http://ant.apache.org/manual/CoreTasks/exec.html
>
> Gert
If it's possible to spawn a process in the background, it would be nice
if there was a facility to rejoin the process at a later stage in the
build process... this would allow for orthogonal processes to be run
simultaneously, allowing throughput to be (greatly) improved in
multi-CPU or distributed builds.
<exec program="bg.exe" spawn="true" pid-property="bg.pid" />
<other-bookkeeping-tasks />
<rejoin pid="${bg.pid}" />
Actually, along these lines, it would theoretically be relatively simple
to multi-thread NAnt itself... the target dependency model defines a
strong partial ordering of targets; NAnt could simultaneously execute
_every_ target that is eligible for execution, within definable
parameters such as maximum number of threads, or maximum simultaneous
compilation tasks.
This would make the slingshot task much more valuable, since it would
allow a solution with a wide dependency tree to be compiled in multiple
threads, or on multiple machines once NAnt supports distributed builds
:-)
The only downside to this approach (without further changes) is that the
dependency model is a little _too_ strong... if the test target depends
on the build target, then there is no way to run the test target without
also running the build target, for any reason (And there are various
legitimate reasons for doing this).
Anyway,
-T
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