devserver: fix exception related discrepancies
* DeltaPayloadsArtifact._Setup() neglected to (re-)raise and exception
when an error occurred. This contradicts the docstring and a likely
cause for inconsistencies surrounding missing artifact files.
* BuildArtifact.Process() caught and re-raised any exception, although
it's only supposed to be raising BuildArtifactError. We now convert
any unknown exception into the latter (albeit losing the stack trace).
This necessitates that we adjust our handling of exception at call
sites for build_artifact, too.
BUG=chromium:277839
TEST=Unit tests.
Change-Id: I30a87e9722460fdbfab54c3ff60e1d7a8013b3cb
Reviewed-on: https://chromium-review.googlesource.com/176932
Tested-by: Gilad Arnold <garnold@chromium.org>
Reviewed-by: Dan Shi <dshi@chromium.org>
3 files changed
