[WIP] Add custom transformer plugins

[jakebailey]

For #14419
Fixes #54276

I have not finished fleshing out this PR; there's probably a lot wrong with how I am loading the new plugins, but I'd like to get feedback on the usability of this early while we iterate on the design and implementation.

I'll update the proposal and PR description with more info closer to completion.

Also, sorry, but I'm probably going to break my own rules and force push this branch; it futzes with the output files and adds a new d.ts and it'll be clearer with single commits. gerrit when?

[jakebailey]

@typescript-bot pack this

[typescript-bot]

Heya @jakebailey, I've started to run the tarball bundle task on this PR at 41fc675. You can monitor the build here.

[typescript-bot]

Hey @jakebailey, I've packed this into an installable tgz. You can install it for testing by referencing it in your package.json like so:

{
    "devDependencies": {
        "typescript": "https://typescript.visualstudio.com/cf7ac146-d525-443c-b23c-0d58337efebc/_apis/build/builds/154373/artifacts?artifactName=tgz&fileId=E84F858A7DB193E4718B04B36E180E9732E1BF8E0B89865EB1560119CDC550DA02&fileName=/typescript-5.2.0-insiders.20230516.tgz"
    }
}

and then running npm install.

---

There is also a playground for this build and an npm module you can use via "typescript": "npm:@typescript-deploys/pr-build@5.2.0-pr-54278-2".;

[Jack-Works]

maybe allow CompilerOptions to feed transformer factories directly, it will be better for API users.

[jakebailey]

I'm not sure I understand your point; isn't the type checker available on Program?

[samchon]

Oops, sorry for mis-reading.

I'd imported different type.

[jakebailey]

However, current ts.CustomTransformerFactory does not provide the ts.Program instance.

It definitely does, it's passed to the create function.

Furthermore, as Node and SourceFile instance from typescript/lib/tsclibrary had removed most features, I can't do anything in typia.

Correct. The core compiler has a limited API.

[samchon]

However, current ts.CustomTransformerFactory does not provide the ts.Program instance.

It definitely does, it's passed to the create function.

Furthermore, as Node and SourceFile instance from typescript/lib/tsclibrary had removed most features, I can't do anything in typia.

Correct. The core compiler has a limited API.

May I ask you the reason why limiting the API? I can't do anything with limited API.

[jakebailey]

The API provided in this file is the API currently provided by tsc. The other files contain other APIs, including special allocators that add the extra methods to Node and Symbol, but slow down the compiler.

It's possible we will be removing those allocators, but there are other benefits to this distinction. Maybe we'll find ways around that too.

[samchon]

I'm currently making a new branch in typia and testing it.

By the way, I don't know how much speedup there is by using typescript/lib/tsclibrary instead of typescript, but I'm very sad to find that there is no way for my typia and nestia. Even checking number type became impossible, due to ts.Type.getFlags() method has been erased.

I'm sorry for criticizing even from the 1st PR. However, type info is very important feature for my typia and nestia projects. Considering the purpose of the TypeScript project, I think this is nonsense. It just sounds me like "I removed the seatbelt and fuel efficiency went up."

[samchon]

I think it should start from location of tsconfig.json file, but you're using current-working-directory.

This is the one of different part with ttypescript (and ts-patch).

[jakebailey]

This is theoretically the tsconfig dir, but yes, this code is very WIP.

[samchon]

Tested in test/tsconfig.json file and program.getCurrentDirectory() was typia/.

• typia/
  • node_modules/
  • package.json
  • tsconfig.json
  • test/
    • tsconfig.json

[jakebailey]

Hmm. Oops, but all of this is going to be replaced anyway. This branch is effectively demo code at the moment.

[sosoba]

Hello. How about diagnostic messages? How plugin can send warnings and errors as DiagnosticMessage?

[sosoba]

And how about watch mode? Is it covered by another PR?

[typescript-bot]

Looks like you're introducing a change to the public API surface area. If this includes breaking changes, please document them on our wiki's API Breaking Changes page.

Also, please make sure @DanielRosenwasser and @RyanCavanaugh are aware of the changes, just as a heads up.

[Anutrix]

Any updates?