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dd059edd58
Instead of loosely wrapping emerge, parallel_emerge now integrates tightly with emerge. This boosts performance while allowing us to map dependencies more accurately.
With this change, build_image --fast can clock under 4 minutes, and build_packages --fast now clocks as low as 4:30. With the --rebuild option, build_packages takes 5:30, but it has the big benefit of producing actually-correct results.
Note that this change also depends on us updating the various build scripts to prefix
calls to parallel_emerge with sudo -E.
TEST=Ran several parallel_emerge test cases, build_packages --fast, and
build_image --fast
BUG=none
Review URL: http://codereview.chromium.org/2891013