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Fix relative path - #57961

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Hang Liang (xlianghang) wants to merge 2 commits into
microsoft:mainfrom
xlianghang:fix-relative-path
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Fix relative path#57961
Hang Liang (xlianghang) wants to merge 2 commits into
microsoft:mainfrom
xlianghang:fix-relative-path

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@xlianghang

@xlianghangHang Liang (xlianghang) commented Mar 27, 2024

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Fixes#57956
Fixes#57926

Related changes: fbcdb8c#r140302331

@typescript-botTypeScript Bot (typescript-bot) added the For Uncommitted Bug PR for untriaged, rejected, closed or missing bug label Mar 27, 2024
Comment on lines +551 to +552
const nearestTargetPackageJson = getNearestAncestorDirectoryWithPackageJson(host, getDirectoryPath(modulePath), { returnAsBooleanIfHostMethodMissing: true });
const nearestSourcePackageJson = getNearestAncestorDirectoryWithPackageJson(host, sourceDirectory, { returnAsBooleanIfHostMethodMissing: true });

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Why not just do !! at the start of these? No other calls need to pass these options in.

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Why not just do !! at the start of these? No other calls need to pass these options in.

According to the logic before, if the host.getNearestAncestorDirectoryWithPackageJson methods exist, will use the return value of a string

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I see, didn't realize this returned a string, and the point is to compare those.

I don't think that this is exactly how we'd want to fix it as it seems to overfit for the bug, but without a test case I can't really offer a better idea yet.

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I'll say that this fix just seems confusing; it's basically changing the code to report maybeNonRelative if the paths have differing "is in a package"-ness, but that sure feels like the wrong signal. But that's what the old code kinda did too. Andrew Branch (@andrewbranch) may have a better clue here.

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Wouldn't you just be able to check that getNearestAncestorDirectoryWithPackageJson(host, sourceDirectory) !== undefined?

@jakebailey

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FWIW you'll want to pull out a test for this; since you made a minimal repro in #57956 you should be able to construct a test case in tests/cases/compiler with multiple files and declaration emit enabled.

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