fix: detect route conflicts in nested groups with optional params#15271
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FrankFMY wants to merge 2 commits intosveltejs:mainfrom
Open
fix: detect route conflicts in nested groups with optional params#15271FrankFMY wants to merge 2 commits intosveltejs:mainfrom
FrankFMY wants to merge 2 commits intosveltejs:mainfrom
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The regex in prevent_conflicts that removes duplicate slashes was missing the global flag, so only the first occurrence of consecutive slashes was replaced. This caused routes like /(group)/base and /(group)/base/(optional-group)/[[param]] to not be detected as conflicting because the second set of double slashes remained. Fixes sveltejs#13704
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Summary
Fixes #13704. The
prevent_conflictsfunction increate_manifest_datafailed to detect conflicting routes when route groups were nested with optional parameters.For example,
/(group)/base/+page.svelteand/(group)/base/(optional-group)/[[optionalParam]]/+page.svelteboth resolve to/basebut the conflict was not detected.Root cause: The regex on line 564 that removes duplicate slashes —
.replace(/\/{2,}/, '/')— was missing the globalgflag. Whennormalize_route_idremoves group segments from a route like/(group)/base/(optional-group)/[[optionalParam]], it produces//base//<?*>. After expanding the optional parameter, one permutation is//base//. Without thegflag, only the first//is collapsed to/, leaving/base/instead ofbase— which doesn't match the keybasefrom the other route.Fix: Add the
gflag:.replace(/\/{2,}/g, '/').Test plan
conflicting-nested-groupstest sample with two routes that resolve to the same URL