See also https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/ROADMAP.md

@JoshuaKGoldberg I've been working through some of these in the process of trying to get the TypeScript repo onto ESLint. I have PRs up for a few and a few I'm still working out the details on, but I'd love some help with the rest, since I'm prioritizing the ones that TS has enabled.

I'm not at all familiar with the TSLint rule API, but would it be feasible to have a compatibility wrapper that generically converts TSLint rules to ESLint rules at runtime? That would avoid the effort of manually reimplementing TSLint rules as ESLint rules, both for this project and for custom rules.

In other words, it would be similar to eslint-plugin-tslint except that it would just invoke a single TSLint rule rather than invoking TSLint itself. This might have some performance benefits because it wouldn't be necessary to re-parse each file.

@not-an-aardvark We now reuse the ts SourceFile and Program via parserServices, so it shouldn't need to re-parse the file already

Definitely excited to explore more ideas around bridging/conversion though! Just wanted to point that out :)

We now reuse the ts SourceFile and Program via parserServices, so it shouldn't need to re-parse the file already

I see, I was confused because it's passing in the source text too, but I hadn't realized it was also passing in the parsed version.

You might well be right, I need to look into - thanks for following up!

@JoshuaKGoldberg Just to confirm, PRs definitely welcome! I think it would be good to use the existing ROADMAP.md as the source of truth for the progress of this, rather than the items in this issue, as it is more discoverable and under version control.

Thanks!

Will/can rules that depend on compiler information be implemented in this bridge as well (e.g. the helpful no-unsafe-any)?

@fabb here's a list of currently implemented rules that already use the parser services to do get type information.

https://github.com/search?utf8=%E2%9C%93&q=getParserServices+user%3Atypescript-eslint+repo%3Atypescript-eslint+path%3Apackages%2Feslint-plugin%2Flib%2Frules&type=Code&ref=advsearch&l=&l=