Backtrack through calls from @rules to synchronous engine methods (Cherry-pick of #15979)
#16003
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…antsbuild#15979) As reported in pantsbuild#15954, backtracking doesn't currently work when a synchronous method like `Workspace.write_digests` is the source of a `MissingDigest` error. This was due to a TODO left behind in pantsbuild#15761, where we did not propagate the `Failure` type "through" `@rule` bodies. To fix this, we add a conversion from `Failure` to `PrErr` which wraps in a well known exception type, and then look for that type when converting back from `PyErr` to `Failure`. Fixes pantsbuild#15954. # Building wheels and fs_util will be skipped. Delete if not intended. [ci skip-build-wheels]
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Duplicate of #16001. |
Heh, thanks. |
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As reported in #15954, backtracking doesn't currently work when a synchronous method like
Workspace.write_digestsis the source of aMissingDigesterror. This was due to a TODO left behind in #15761, where we did not propagate theFailuretype "through"@rulebodies.To fix this, we add a conversion from
FailuretoPrErrwhich wraps in a well known exception type, and then look for that type when converting back fromPyErrtoFailure.Fixes #15954.