[6.2.1] Cherry-pick: Fix traits .when(traits:) condition; pre-computation when loading dependency manifests #9141
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…ftlang#9015) The culprit here is the fact that we were essentially doing an AND boolean check across all the traits in the target dependency condition, when we should be doing an OR boolean check. If at least one trait is enabled in the list of traits in the target dependency condition, then the target dependecy should be considered enabled as well.
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@swift-ci please test |
…tlang#9057) This fix addresses some issues that arose with trait-based dependency resolution on Linux and, found through development, a related issue found involving the `swift package show-dependencies` command. It fixes an error that was thrown as a discrepancy in state when executing `swift package show-dependencies` if traits were guarding a dependency and was omitted from the package graph. Additionally, this will assure that the `EnabledTraitsMap` guards against explicitly adding "default" traits to the stored dictionary, since this wrapper is a mechanism to determine whether traits have been explicitly set (and therefore have overridden "default" or have flattened the list of default traits).
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@swift-ci please test |
bripeticca
changed the title
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@swift-ci please test windows |
rconnell9
approved these changes
Sep 19, 2025
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Addresses multiple traits issues:
whencondition of a target dependency were enabled for the dependency to be considered unguarded, but now the check confirms that at least one trait in the condition is enabled.There were also cases where we were re-computing transitively enabled traits in areas where we had already filled out the enabledTraitsMap, so we now default to simply fetching the entry from the dictionary instead of computing the traits all over again.
Package resolution stage; particularly affects pre-computation of transitively enabled traits when determining which target dependencies are/aren't guarded by traits. Also allows for multiple traits to be considered in a target dependency's
whencondition, any of which being enabled would then include said target dependency.Fix for .when(traits:) condition not working for multiple traits #9015
Fix pre-computation of traits when loading dependency manifests #9057
Low risk; fixes trait-related issues.
Fixtures added for end-to-end testing of the issue; regression tests added to multiple suites
@FranzBusch @jakepetroules @dschaefer2