refactor(router-core): remove dead code in buildLocation left over from reverting match snapshots

[Sheraff]

Summary by CodeRabbit

• Refactor
  • Optimized router's global not-found handling to reduce code complexity and improve performance.

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 24f98eb

Command	Status	Duration	Result
nx affected --targets=test:eslint,test:unit,tes...	✅ Succeeded	13m 26s	View ↗
nx run-many --target=build --exclude=examples/*...	✅ Succeeded	1m 45s	View ↗

---

☁️ Nx Cloud last updated this comment at 2026-01-25 17:13:30 UTC

[coderabbitai]

📝 Walkthrough

Walkthrough

The buildLocation function in the router core simplifies global not-found route handling by condensing the logic into a single condition: if isGlobalNotFound and a notFoundRoute exists, append it to destRoutes. This removes the previous branching approach while maintaining equivalent behavior.

Changes

Cohort / File(s)	Summary
Global Not-Found Handler Simplification packages/router-core/src/router.ts	Streamlined conditional logic for appending not-found routes in buildLocation; removed redundant branching for globalNotFoundRouteId computation when notFoundRoute is present (−10/+2 lines)

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• TanStack/router#6445 — Modifies the same buildLocation function to simplify global not-found handling
• TanStack/router#6464 — Refactors routing logic within buildLocation including from-location parsing
• TanStack/router#6507 — Adds comprehensive unit tests for buildLocation functionality

Suggested labels

package: router-core

Suggested reviewers

• schiller-manuel

Poem

🐰 Hop, hop, hopping through the router core,
Not-found routes streamlined, much cleaner than before!
Less branching, more logic, the code's in the know,
A little refactor helps the navigate flow. ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: removing dead code in buildLocation related to reverting match snapshots, which aligns with the simplified not-found resolution logic shown in the summary.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

• 📝 Generate docstrings

---

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[pkg-pr-new]

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commit: 24f98eb