Compiler: emit .o file to a temporary location and then atomically rename it
#5585
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RX14
approved these changes
Jan 14, 2018
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I ran into an issue where I used |
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@monouser7dig very likely. |
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So I could probably try that (if brew --HEAD build works at the moment) or maybe this helps you to reproduce. entr was a fantastic mention from your size btw. thanks, very useful |
luislavena
approved these changes
Jan 15, 2018
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This was suggested by @RX14
Sometimes we get an error on a compilation that happens after we interrupted a previous compilation. It can happen that a
.ofile was being generated but it was interrupted, leaving a corrupted file that was later (incorrectly) reused.This PR changes that so that the object file is first generated with a
.o.tmpname, and then moved to the final location withFile.rename, which should be an atomic operation.I tried to reproduce the cache problem but couldn't (it's hard). We can try this fix and see if it happens again. Or if someone knows how to reproduce the problem, they might try to see if this PR fixes it for them.