examples: update gitignore files for parity for yarn recommendations

[Marukome0743]

What?

Update examples .gitignore files for parity with Yarn's official recommendations, accounting for Yarn's modern Plug-n-Play functionality.

Why?

New projects initialized with create-next-app presently add various extraneous files from the Yarn cache to the initial commit. This is most notable in the case of the Next SWC binary, which may exceed 100M in some environments (empirically, 64-bit Darwin and WSL2 Ubuntu, and very probably other unix/linux environments), and prevent users from pushing their new projects to free GitHub repositories without rewriting the commit history to exclude the extraneous files, or unnecessarily setting up Git LFS to include them.

How?

I have errored on the side of exclusion to enable users to push their CNA projects to GitHub as-is and for parity with other package managers, while still providing the opportunity to opt in to additional functionality provided by modern Yarn.

These changes follow the recommendations for non-Zero-Install configurations, as Zero-Install functionality is an extension on top of the base package manager experience, and may necessitate additional configuration and present additional complications for unsuspecting users, so I think it's best left up to the user to opt-in. On account of the majority of publicly available Next.js-based projects comprising general consumer-facing websites, it is my belief that the majority of Next projects would not benefit from Yarn's Zero-Install functionality, and that explicitly facilitating it by default would break status quo with all other non-Yarn CNA projects.

Contrary to the example .gitignores provided by Yarn, I've excluded the .yarn/sdks directory as it contains IDE-specific tooling; I feel it would be presumptuous for an environmentally-agnostic tool to target and provide package-manager-specific tooling for specific editors. This too should be left to the user to opt-in to and provide for their project if they deem necessary.

I have retained the current .gitignore's exclusion of the /.pnp directory for backwards compatibility with older versions of Yarn (the files therein have since been reallocated to the .yarn directory addressed by these changes, but I am not clear on when that delineation occurred or the prevalence of Yarn installations which depend on the former convention). Maintaining the exclusion here, in the worst case, implies additional downloads (on an order of magnitude merely similar to using npm from the outset) rather than failure.

CC: @samcx

Adding or Updating Examples

• The "examples guidelines" are followed from our contributing doc https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md
• Make sure the linting passes by running pnpm build && pnpm lint. See https://github.com/vercel/next.js/blob/canary/contributing/repository/linting.md

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: c0be945

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: 48957c9

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[samcx]

@Marukome0743 No need to merge canary, just ping the team (CI will fail if you do)

[samcx]

Thank you for submitting a PR!

[Marukome0743]

@Marukome0743 No need to merge canary, just ping the team (CI will fail if you do)

Oh, sorry for my inconvinience.
May I ping you Mr. samcx if the example PR isn't reviewed over a month?
Someone hates pinging due to annoying.

[samcx]

@Marukome0743 That's fine with me!

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	Marukome0743/next.js gitignore	Change
buildDuration	17.2s	15.3s	N/A
buildDurationCached	14.6s	12.2s	N/A
nodeModulesSize	410 MB	410 MB	✓
nextStartRea..uration (ms)	471ms	472ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	Marukome0743/next.js gitignore	Change
1187-HASH.js gzip	51 kB	51 kB	N/A
8276.HASH.js gzip	169 B	168 B	N/A
8377-HASH.js gzip	5.36 kB	5.36 kB	N/A
bccd1874-HASH.js gzip	53 kB	53 kB	N/A
framework-HASH.js gzip	57.5 kB	57.5 kB	N/A
main-app-HASH.js gzip	233 B	235 B	N/A
main-HASH.js gzip	34.1 kB	34 kB	N/A
webpack-HASH.js gzip	1.71 kB	1.71 kB	N/A
Overall change	0 B	0 B	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	Marukome0743/next.js gitignore	Change
polyfills-HASH.js gzip	39.4 kB	39.4 kB	✓
Overall change	39.4 kB	39.4 kB	✓

Client Pages

	vercel/next.js canary	Marukome0743/next.js gitignore	Change
_app-HASH.js gzip	193 B	193 B	✓
_error-HASH.js gzip	193 B	193 B	✓
amp-HASH.js gzip	512 B	510 B	N/A
css-HASH.js gzip	343 B	342 B	N/A
dynamic-HASH.js gzip	1.84 kB	1.84 kB	✓
edge-ssr-HASH.js gzip	265 B	265 B	✓
head-HASH.js gzip	363 B	362 B	N/A
hooks-HASH.js gzip	393 B	392 B	N/A
image-HASH.js gzip	4.49 kB	4.49 kB	N/A
index-HASH.js gzip	268 B	268 B	✓
link-HASH.js gzip	2.35 kB	2.34 kB	N/A
routerDirect..HASH.js gzip	328 B	328 B	✓
script-HASH.js gzip	397 B	397 B	✓
withRouter-HASH.js gzip	323 B	326 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	3.59 kB	3.59 kB	✓

Client Build Manifests

	vercel/next.js canary	Marukome0743/next.js gitignore	Change
_buildManifest.js gzip	749 B	746 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	Marukome0743/next.js gitignore	Change
index.html gzip	524 B	523 B	N/A
link.html gzip	539 B	537 B	N/A
withRouter.html gzip	520 B	519 B	N/A
Overall change	0 B	0 B	✓

Edge SSR bundle Size

	vercel/next.js canary	Marukome0743/next.js gitignore	Change
edge-ssr.js gzip	128 kB	128 kB	N/A
page.js gzip	204 kB	204 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	Marukome0743/next.js gitignore	Change
middleware-b..fest.js gzip	671 B	668 B	N/A
middleware-r..fest.js gzip	155 B	156 B	N/A
middleware.js gzip	31.2 kB	31.2 kB	N/A
edge-runtime..pack.js gzip	844 B	844 B	✓
Overall change	844 B	844 B	✓

Next Runtimes

	vercel/next.js canary	Marukome0743/next.js gitignore	Change
523-experime...dev.js gzip	322 B	322 B	✓
523.runtime.dev.js gzip	314 B	314 B	✓
app-page-exp...dev.js gzip	323 kB	323 kB	✓
app-page-exp..prod.js gzip	127 kB	127 kB	✓
app-page-tur..prod.js gzip	140 kB	140 kB	✓
app-page-tur..prod.js gzip	135 kB	135 kB	✓
app-page.run...dev.js gzip	314 kB	314 kB	✓
app-page.run..prod.js gzip	123 kB	123 kB	✓
app-route-ex...dev.js gzip	37.4 kB	37.4 kB	✓
app-route-ex..prod.js gzip	25.5 kB	25.5 kB	✓
app-route-tu..prod.js gzip	25.5 kB	25.5 kB	✓
app-route-tu..prod.js gzip	25.3 kB	25.3 kB	✓
app-route.ru...dev.js gzip	39 kB	39 kB	✓
app-route.ru..prod.js gzip	25.3 kB	25.3 kB	✓
pages-api-tu..prod.js gzip	9.69 kB	9.69 kB	✓
pages-api.ru...dev.js gzip	11.6 kB	11.6 kB	✓
pages-api.ru..prod.js gzip	9.68 kB	9.68 kB	✓
pages-turbo...prod.js gzip	21.7 kB	21.7 kB	✓
pages.runtim...dev.js gzip	27.4 kB	27.4 kB	✓
pages.runtim..prod.js gzip	21.7 kB	21.7 kB	✓
server.runti..prod.js gzip	916 kB	916 kB	✓
Overall change	2.36 MB	2.36 MB	✓

build cache Overall increase ⚠️

	vercel/next.js canary	Marukome0743/next.js gitignore	Change
0.pack gzip	2.06 MB	2.06 MB	⚠️ +2.41 kB
index.pack gzip	72.7 kB	72.4 kB	N/A
Overall change	2.06 MB	2.06 MB	⚠️ +2.41 kB

Diff details

Diff for main-HASH.js

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Commit: 16c0196