lib.fileset: Lazier path existence check#267091
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infinisil wants to merge 2 commits intoNixOS:masterfrom
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lib.fileset: Lazier path existence check#267091infinisil wants to merge 2 commits intoNixOS:masterfrom
lib.fileset: Lazier path existence check#267091infinisil wants to merge 2 commits intoNixOS:masterfrom
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lib.fileset: Lazier path existence check
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- Make fromSource's missing file error message more consistent with others, and add a test for it - Indent some function arguments - Make the contextual error test not rely on nested paths Makes the next commit smaller - Add single-file tests for trace and fileFilter
Allows things like `difference ./. ./a` even if `./a` doesn't exist. Not perfect however, because `difference ./. (difference ./a ./a/b)` doesn't give an error if `./a/b` doesn't exist. This is considered an edge case, but it could be fixed in the future.
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Yes, this in particular. |
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Looks like we need a sercet breaker. |
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There were some minor changes here useful on their own, created a separate PR for those: #268520 |
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Description of changes
Allows things like
difference ./. ./aeven if./adoesn't exist.Another case that's now doable is
intersection ./a (union ./a ./b)even if./bdoesn't exist.This is an alternative to #265964 that doesn't require a new function and is more transparent to the user.
It's not perfect however, because
difference ./. (difference ./a ./a/b)doesn't give an error anymore if
./a/bdoesn't exist. We can maybe consider this an edge case. This could be fixed in the future, but would need a non-trivial change to the internal representation.More problematic however is that you aren't protected against typos in the negative argument anymore: If you want to remove
./secret, but you writedifference ./. ./sercetinstead, it would just fail silently and import the path into the store! This is making me think that we maybe shouldn't do this.This work is sponsored by Antithesis ✨
Things done