[serve] --hot-only is broken

[snitin315]

Describe the bug

--hot-only is broken.

What is the current behavior?

To Reproduce

webpack serve --hot-only

Expected behavior

Should work properly.

Screenshots
pasted above

Please paste the results of webpack-cli info here, and mention other relevant information

Additional context
No

[snitin315]

The webpack-dev-server v4 schema seems to work fine.

[anshumanv]

wip

[anshumanv]

There's a problem with config creator for serve package

[snitin315]

webpack-cli/packages/serve/src/createConfig.ts

Lines 22 to 26 in f86ef2d

	if (options.hotOnly) {
	options.hot = 'only';
	// hotOnly is not a valid devServer option
	delete options.hotOnly;
	}

v3 -> https://github.com/webpack/webpack-dev-server/blob/4ab1f21bc85cc1695255c739160ad00dc14375f1/lib/options.json#L136-L138

v4 -> https://github.com/webpack/webpack-dev-server/blob/9f1d02b909e22ece60dde2e57cbfce14feafde69/lib/options.json#L133-L142

[anshumanv]

I think we should check dev server version and apply corresponding options 😞

[snitin315]

I believe it's here. This block should be executed for v4 only.

I think we should check dev server version and apply corresponding options disappointed

Yes