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Improve python/rust boundary error handling #5414

merged 2 commits into from Feb 2, 2018


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stuhood commented Feb 1, 2018


For calls from python to rust, we didn't have a convention in place (with the exception of calls that returned Node values) for returning the equivalent of a rust Result type to python.


Repurpose an existing Externs struct (RunnableComplete) as PyResult, and use it to remove a panicing TODO that was easy to trip on.

Additionally, rename invoke_runnable to call, and add eval.


Begins to fix #4208 (although we should still close it), and avoids a too-common panic.


jsirois approved these changes Feb 2, 2018

@stuhood stuhood merged commit 2b2f59d into pantsbuild:master Feb 2, 2018

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@stuhood stuhood deleted the twitter:stuhood/improve-py-rust-error-handling branch Feb 2, 2018


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illicitonion commented Feb 2, 2018

Looks good :) Thanks!

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