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fix(scope-manager): reconcile type-value distinction for implicit globals across libs#11715
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Thanks for the PR,@lilnasy! typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community. The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately. Thanks again! 🙏Please, if you or your company is finding typescript-eslint valuable, help us sustain the project by sponsoring it transparently onhttps://opencollective.com/typescript-eslint. |
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@## main #11715 +/- ##======================================= Coverage 90.66% 90.66% ======================================= Files 518 518 Lines 52444 52454 +10 Branches 8690 8694 +4 =======================================+ Hits 47548 47558 +10- Misses 4882 4883 +1+ Partials 14 13 -1
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instead of mutating the variable here -- could we instead do it higher.
eg:
In theGlobalScope class (which callsScopeBase.defineVariable):
typescript-eslint/packages/scope-manager/src/scope/GlobalScope.ts
Lines 68 to 79 inea2ee6b
| publicdefineImplicitVariable( | |
| name:string, | |
| options:ImplicitLibVariableOptions, | |
| ):void{ | |
| this.defineVariable( | |
| newImplicitLibVariable(this,name,options), | |
| this.set, | |
| this.variables, | |
| null, | |
| null, | |
| ); | |
| } |
Or in theReferencer class (which callsGlobalScope.defineImplicitVariable):
| // This loop is guaranteed to see each included lib exactly once | |
| for(const[name,variable]oflib.variables){ | |
| globalScope.defineImplicitVariable(name,variable); | |
| } |
I think the latter would be better as we could pre-aggregate the variable definitions to deduplicate and merge them before even callingdefineImplicitVariable.
lilnasy commentedNov 8, 2025
@bradzacher I'm thinking it would be even better to go one level higher. The first year-wise occurrence of the globals I glimpsed at seems to always be |
PR Checklist
Overview
To fix the issue, implicit variables are mutated as the global scope is being populated.
I admittedly did not spend much time thinking of a proper solution. Though it was tricky to pinpoint, the fix is simple. I imagine the "correct" location for the fix is a matter of maintainer preference.
Direct commits from maintainers welcome.