feat(LS): references

[Druue]

To test this locally:

1. npm i && npm run bootstrap in the root of language-tools
   2. ./prisma-schema-wasm/scripts/update-schema-wasm.sh in the root of engines
2. npm run compile in the root of language-tools
3. In VS Code open run & debug (cmd + shift + d on mac) and hit Launch VS Code extension

---

3.5 if you see the the following error message:

Error: Cannot find module '.../language-tools/packages/language-server/dist/bin'
    at Function._resolveFilename (node:internal/modules/cjs/loader:1084:15)
    at node:internal/modules/cjs/loader:929:27
    at Function._load (node:electron/js2c/node_init:2:13672)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:101:12)
    at node:internal/main/run_main_module:23:47 {
  code: 'MODULE_NOT_FOUND',
  requireStack: []
}

4. cd packages/language-server
5. tsc -p ./ and re-try launching the extension

companion pr to prisma/prisma-engines#4934

[github-actions]

🤖 Pull request artifacts

empty string

file	commit
prisma.vsix	c16f72b

[github-actions]

Try this extension build via GitPod

[SevInf]

Missing console.log, otherwise looks good!

[SevInf]

I've tested that a bit in a GitPod and i thing references for the fields works a little bit backwards from how I am expecting them to:

I have 3 files:

// config.prisma
generator client {
    provider = "prisma-client-js"
    previewFeatures = ["prismaSchemaFolder"]
}

datasource db {
    provider = "sqlite"
    url = "file:dev.db"
}

// User.prisma
model User {
    id   String @id
    name String
    posts Post[]
}


// Post.prisma

model Post {
    id String @id
    title String
    authorId String
    author User @relation(fields: [authorId], references: [id])
}

When I look for references of User.id, I'd expect to get author User @relation(fields: [authorId], references: [id]) line in Post.id as a result. At the same time, I am not sure, looking for references of [authorId] in relation/index definition should produce any result (it points to authorId now) - it is index or relation that references the field, not other way around.