feat(cli): support generation of sass and less files

[christian-bromann]

What is the current behavior?

This feature was requested in #2155 but the community PR (#2334) was never reviewed. Let's get this in as it seems generally useful.

What is the new behavior?

We recognise the Less or Sass plugin now, if it exists and generate a proper style file. In case Sass is used, we also ask which format they want to use (.sass vs scss files).

Documentation

n/a

Does this introduce a breaking change?

• Yes
• No

Testing

n/a

Other information

@tanner-reits you made this comment to enhance the create-stencil package, can you elaborate what you were thinking?

[github-actions]

@stencil/core@4.18.3 ts
tsc --noEmit --project scripts/tsconfig.json && tsx scripts/tech-debt-burndown-report.ts

--strictNullChecks error report

Typechecking with --strictNullChecks resulted in 1079 errors on this branch.

Unfortunately, it looks like that's an increase of 2 over main 😞.

Violations Not on `main` (may be more than the count above)

Path	Location	Error	Message
src/cli/task-generate.ts	(48, 9)	TS18048
src/cli/task-generate.ts	(50, 16)	TS18048
src/cli/test/task-generate.spec.ts	(85, 5)	TS2322

reports and statistics

Our most error-prone files

Path	Error Count
src/dev-server/index.ts	37
src/dev-server/server-process.ts	32
src/compiler/prerender/prerender-main.ts	22
src/runtime/vdom/vdom-render.ts	22
src/runtime/client-hydrate.ts	20
src/runtime/vdom/test/patch.spec.ts	19
src/runtime/vdom/test/util.spec.ts	19
src/screenshot/connector-base.ts	19
src/testing/puppeteer/puppeteer-element.ts	19
src/dev-server/request-handler.ts	15
src/runtime/connected-callback.ts	15
src/compiler/prerender/prerender-optimize.ts	14
src/compiler/sys/stencil-sys.ts	14
src/sys/node/node-sys.ts	14
src/compiler/prerender/prerender-queue.ts	13
src/compiler/sys/in-memory-fs.ts	13
src/runtime/set-value.ts	13
src/compiler/output-targets/output-www.ts	12
src/compiler/transformers/test/parse-vdom.spec.ts	12
src/compiler/transformers/transform-utils.ts	12

Our most common errors

Typescript Error Code	Count
TS2322	338
TS2345	329
TS18048	188
TS18047	99
TS2722	27
TS2532	23
TS2531	19
TS2790	11
TS2454	10
TS2352	9
TS2769	8
TS2416	7
TS2538	4
TS2493	3
TS18046	2
TS2684	1
TS2430	1

Unused exports report

There are 15 unused exports on this PR. That's the same number of errors on main, so at least we're not creating new ones!

Unused exports

File	Line	Identifier
src/runtime/bootstrap-lazy.ts	22	setNonce
src/screenshot/screenshot-fs.ts	18	readScreenshotData
src/testing/testing-utils.ts	198	withSilentWarn
src/utils/index.ts	145	CUSTOM
src/utils/index.ts	245	NODE_TYPES
src/utils/index.ts	269	normalize
src/utils/index.ts	7	escapeRegExpSpecialCharacters
src/compiler/app-core/app-data.ts	25	BUILD
src/compiler/app-core/app-data.ts	116	Env
src/compiler/app-core/app-data.ts	118	NAMESPACE
src/compiler/fs-watch/fs-watch-rebuild.ts	123	updateCacheFromRebuild
src/compiler/types/validate-primary-package-output-target.ts	82	satisfies
src/compiler/types/validate-primary-package-output-target.ts	82	Record
src/testing/puppeteer/puppeteer-declarations.ts	496	WaitForEventOptions
src/compiler/sys/fetch/write-fetch-success.ts	7	writeFetchSuccessSync

[github-actions]

PR built and packed!

Download the tarball here: https://github.com/ionic-team/stencil/actions/runs/9683411829/artifacts/1641269295

If your browser saves files to ~/Downloads you can install it like so:

unzip -d ~/Downloads ~/Downloads/stencil-core-4.18.3-dev.1719419668.2427fe8.tgz.zip && npm install ~/Downloads/stencil-core-4.18.3-dev.1719419668.2427fe8.tgz

[tanner-reits]

Overall looks good. Just some failing tests from a possible null/undefined field and lint/formatting

[christian-bromann]

@tanner-reits fixed the failing build and added tests