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fix: add tsup --shims for ESM/CJS dirname compatibility#308

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kevcodez merged 1 commit intostripe:mainfrom
Niki2k1:fix/esm-dirname-compat
Apr 6, 2026
Merged

fix: add tsup --shims for ESM/CJS dirname compatibility#308
kevcodez merged 1 commit intostripe:mainfrom
Niki2k1:fix/esm-dirname-compat

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@Niki2k1 Niki2k1 commented Apr 5, 2026

Bare __dirname is a CJS-only global and is undefined in ESM contexts.
This enables tsup --shims so the ESM build has __dirname.

What kind of change does this PR introduce?

Bug fix

What is the current behavior?

Calling runMigrations() in ESM returns "__dirname is not defined"

What is the new behavior?

tsup generates shims so runMigrations() works both in CJS and EMS because __driname gets defined

Additional context

Note

I let Claude Code fix this and did not write code myself. I validated the changes in my ESM Project.

I hope this is ok for you.

Bare __dirname is a CJS-only global and is undefined in ESM contexts.
Enable tsup --shims so both the ESM and CJS builds get proper polyfills
for __dirname, __filename, and import.meta.url respectively.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
@kevcodez kevcodez merged commit c1a5c74 into stripe:main Apr 6, 2026
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@Niki2k1 Niki2k1 deleted the fix/esm-dirname-compat branch April 6, 2026 14:22
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2 participants