Move build-script
apply default arguments into separate module
#11882
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Purpose
This PR moves the
apply_default_arguments
logic out of the mainbuild-script
code into thedriver_arguments
module in order to better stage for #11872 and eventually #11880. The diff will show that the move was not strictly a copy-paste, the chunk for determining if ninja ought be built requires thetoolchain
information which only exists in theBuildScriptInvocation
class. I've opted instead to single out that single case and keep it where it was, everything else was moved verbatim.rdar://problem/34336890