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Giacomo Vercesi
05dc27715d
This commit introduces some changes to how the revng pipeline handles serializing to disk. Specificaly: * Pipeline globals (specifically model.yml) are better handled if they are in a subdirectory. They are now saved in the "context" subdirectory. * In python:revng.api the pipeline is serialized whenever there is a non-reproducible change to the state (e.g. binary upload or model change). In the case of analyses this is done conservatively by checking that the diff produced is not empty. * The logic for computing a step's subdirectory has been moved to the pipeline runner, consequently if a step is asked to serialize it will not create any subdirectories. * Functionality for saving a single step/context has been exposed in Pipeline C. * Finally, all path concatenations are now handled by llvm::sys::path::append, for extra os-agnosticism.