[Scons-users] Builder object being called a large number of times and getting odd results

[TOM TANNER (BLOOMBERG/ LONDON)]

I was trying to fiddle with one of my builders in a SConscript file, and I added some trace to it.

It's called (a bit hackily) like this

Import('*')

(gets a Cloned environment)

def _generator(...):
   print for_signature, Glob('stuff/*.mlst', string=True)
   return [ ... ]

bld = Builder(generator = _generator)

env['BUILDERS']['FooBar'] = bld
env.FooBar([target1, target2], [ source1, source2 ])

The builder gets called *eight* times each with for_signature set to 1.

The first time it gets caled, Glob() behaves very strangely, returning me a list of files that exist in the repository BUT with the path to the version where the build targets would exist.

Thus in the repository (path /my/source), there is a file called stuff/fred.mlst

I build in /my/source/aix/64/stuff/fred.mlst

the first time my function gets called, it prints /my/source/aix/64. The other 7 times, it prints stuff/fred.mlst