[Scons-users] Rebuild changed targets

[Mike S.]

For some reason SCons doesn't regenerate an intermediate target if it's
modified. Am I doing something wrong?

# SConstruct ==========================================
import shutil

def copy_file(env, target, source):
    shutil.copy(env.GetBuildPath(source[0]), env.GetBuildPath(target[0]))

env = Environment()
env.Decider('content')
copy_builder = env.Builder( action = copy_file )
copy_builder(env, 'dest1/dummy.txt', 'src/dummy.txt')
copy_builder(env, 'dest2/dummy.txt', 'dest1/dummy.txt')
# ======================================================

$ scons
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
copy_file(["dest1\dummy.txt"], ["src\dummy.txt"])
copy_file(["dest2\dummy.txt"], ["dest1\dummy.txt"])
scons: done building targets.

$ echo "abc" >> dest1/dummy.txt

$ scons
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
copy_file(["dest2\dummy.txt"], ["dest1\dummy.txt"])
scons: done building targets.

I expected dest1\dummy.txt to be regenerated because it is no longer
consistent with src\dummy.txt
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