[Scons-users] (no subject)

[robert zeigler]

I have a situation where a build command can be wrapped in several
different ways, depending on the build environment. The wrapping doesn't
change the actual command executed, it only changes the scheduling of the
execution (think: slurm, open grid engine, etc.).

As a very simple example:

Command["target1", "source1", "somecommand < $SOURCE > $TARGET")

Could be executed directly:

somecommand < source1 > target1

or it could be wrapped, say in a call to slurm:

salloc <resources> srun <resources> somecommand < source1 > target1

I would love for this wrapping of build commands to occur "behind the
scenes":
  1) The wrapping should be applied to all executed commands (so external
builders and tools should "just work"
  2) Target freshness should not depend on the type of wrapping that
occurs, but /should/ still depend on the command that is wrapped.

I've looked through the documentation at custom builders, "AddMethod",
deciders, etc. I can get close to what I want. I might even be able to get
there, but I keep thinking there must be a better way than what I'm trying.
 Is this possible with scons?

Thanks,

Robert
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