fix(aws-serverless): Take http_proxy into account when choosing useLayerExtension default

[andreiborza]

The default setting for useLayerExtension now considers the http_proxy environment variable. When http_proxy is set, useLayerExtension will be off by default. If you use a http_proxy but would still like to make use of the Sentry Lambda extension, exempt localhost in a no_proxy environment variable.

Fixes: #17804

---

Note

Disable useLayerExtension by default when http_proxy is set (unless no_proxy exempts localhost), add debug warnings, tests, and changelog entry.

• aws-serverless:
  • Consider proxy env vars when defaulting useLayerExtension in packages/aws-serverless/src/init.ts.
    • New shouldDisableLayerExtensionForProxy() checks http_proxy and no_proxy (localhost exemptions).
    • Update default: enable only if using Lambda layer, no custom tunnel, and no proxy interference.
    • Add debug warnings when disabling due to proxy and when tunneling via extension.
• Tests:
  • Expand packages/aws-serverless/test/init.test.ts to cover proxy/no_proxy scenarios, explicit overrides, and env cleanup.
• Docs/Changelog:
  • Add Important Changes note explaining new default behavior and how to re-enable with no_proxy exemptions.

^{Written by Cursor Bugbot for commit 53e333f. This will update automatically on new commits. Configure here.}

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	24.23 kB	-	-
@sentry/browser - with treeshaking flags	22.75 kB	-	-
@sentry/browser (incl. Tracing)	40.42 kB	-	-
@sentry/browser (incl. Tracing, Replay)	78.8 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	68.45 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	83.47 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	95.67 kB	-	-
@sentry/browser (incl. Feedback)	40.95 kB	-	-
@sentry/browser (incl. sendFeedback)	28.89 kB	-	-
@sentry/browser (incl. FeedbackAsync)	33.82 kB	-	-
@sentry/react	25.96 kB	-	-
@sentry/react (incl. Tracing)	42.39 kB	-	-
@sentry/vue	28.75 kB	-	-
@sentry/vue (incl. Tracing)	42.23 kB	-	-
@sentry/svelte	24.26 kB	-	-
CDN Bundle	25.75 kB	-	-
CDN Bundle (incl. Tracing)	40.31 kB	-	-
CDN Bundle (incl. Tracing, Replay)	76.55 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback)	82.06 kB	-	-
CDN Bundle - uncompressed	75.3 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	119.31 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	234.47 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	247.23 kB	-	-
@sentry/nextjs (client)	44.4 kB	-	-
@sentry/sveltekit (client)	40.84 kB	-	-
@sentry/node-core	50.33 kB	-	-
@sentry/node	153.41 kB	-	-
@sentry/node - without tracing	92.18 kB	-	-
@sentry/aws-serverless	105.9 kB	+0.15%	+157 B 🔺

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[mydea]

nice one!