fix(dev): fix sourcemaps for v2_dev

[pcattori]

Fixes #6392

TODO

• changeset
• Add fences (// REMIX HMR BEGIN, // REMIX HMR END) around the injected HMR code

[changeset-bot]

🦋 Changeset detected

Latest commit: ef11f5e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 18 packages

Name	Type
@remix-run/dev	Patch
create-remix	Patch
remix	Patch
@remix-run/architect	Patch
@remix-run/cloudflare	Patch
@remix-run/cloudflare-pages	Patch
@remix-run/cloudflare-workers	Patch
@remix-run/css-bundle	Patch
@remix-run/deno	Patch
@remix-run/eslint-config	Patch
@remix-run/express	Patch
@remix-run/netlify	Patch
@remix-run/node	Patch
@remix-run/react	Patch
@remix-run/serve	Patch
@remix-run/server-runtime	Patch
@remix-run/testing	Patch
@remix-run/vercel	Patch

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[jacob-ebey]

Little worried about doing more work in babel. Mind doing some sort of quick perf verification, maybe against brochure?

[pcattori]

applyHmr gets run for each route, so testing perf with different # of routes:

App	Branch	Build	Rebuild
Indie stack	1.18.1	400ms	100ms
Indie stack	pedro/fix-sourcemaps	400ms	100ms
Indie stack w/ 300 manual routes	1.18.1	2.2s	2.2s
Indie stack w/ 300 manual routes	pedro/fix-sourcemaps	2.1s	2.1s

Looks like this PR has same (or even better) perf than 1.18.1

[github-actions]

🤖 Hello there,

We just published version v0.0.0-nightly-da44482-20230706 which includes this pull request. If you'd like to take it for a test run please try it out and let us know what you think!

Thanks!

[github-actions]

🤖 Hello there,

We just published version 1.19.0-pre.0 which includes this pull request. If you'd like to take it for a test run please try it out and let us know what you think!

Thanks!

[github-actions]

🤖 Hello there,

We just published version 1.19.0 which includes this pull request. If you'd like to take it for a test run please try it out and let us know what you think!

Thanks!