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chore: fully type check packages/*/src files #117

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chore: fully type check packages/*/src files #117

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ae9c13c
chore: fully type check packages/*/src files
JoshuaKGoldberg Sep 3, 2024
cb49807
chore: remove unnecessary type assertion
JoshuaKGoldberg Sep 3, 2024
b0cbf31
chore: remove unnecessary unknown/object type changes
JoshuaKGoldberg Sep 3, 2024
ebeb4c8
Update CONTRIBUTING.md
JoshuaKGoldberg Sep 4, 2024
3e4c6e5
Remove strict mode
JoshuaKGoldberg Sep 5, 2024
cb403a2
Merge branch 'main' into tsc-on-src
JoshuaKGoldberg Sep 26, 2024
03bb82a
chore: use @types/levn
JoshuaKGoldberg Sep 26, 2024
47d20c8
chore: split out type_check job
JoshuaKGoldberg Sep 26, 2024
8631f45
switch to test:types
JoshuaKGoldberg Oct 19, 2024
6679eb6
Merge branch 'main'
JoshuaKGoldberg Oct 19, 2024
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18 changes: 18 additions & 0 deletions .github/workflows/ci.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,24 @@ on:
- main

jobs:
type_check:
name: Type Check
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4

- uses: actions/setup-node@v4
with:
node-version: "lts/*"

- name: Install Packages
run: |
npm install
npm run build

- name: Type Check Files
run: npm run tsc

verify_files:
name: Verify Files
runs-on: ubuntu-latest
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40 changes: 40 additions & 0 deletions CONTRIBUTING.md
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[Question] I ended up writing this because I wanted to add a mention of how to type-check, and didn't know where to put it... is this the right place for rewrite contributing docs?

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I think it's fine for now. I'm always torn between CONTRIBUTING.md and README.md. I think it's more important that the information exists somewhere rather than worrying about exactly where at this point.

Original file line number Diff line number Diff line change
@@ -0,0 +1,40 @@
# Contributing

Please be sure to read the contribution guidelines before making or requesting a change.

## Code of Conduct

This project adheres to the [OpenJS Foundation Code of Conduct](https://eslint.org/conduct). We kindly request that you read over our code of conduct before contributing.

## Commands

### Building

[Rollup](https://rollupjs.org) and [TypeScript](https://www.typescriptlang.org) are used to turn source files in `packages/*/src/` into outputs in `packages/*/dist/`.

```shell
npm run build
```

### Linting

ESLint is linted using ESLint.
[Building](#building) the project must be done before it can lint itself.
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Did you find this to be true? Linting generally happens on source files, so not sure why building would be required first.

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Yes, it has a dependency on its own files right now:

$ npm run lint

> [email protected] lint
> eslint .


Oops! Something went wrong! :(

ESLint: 9.9.1

Error: Cannot find module '/Users/josh/repos/rewrite/node_modules/@eslint/config-array/dist/cjs/index.cjs'
    at createEsmNotFoundErr (node:internal/modules/cjs/loader:1256:15)
    at finalizeEsmResolution (node:internal/modules/cjs/loader:1244:15)
    at resolveExports (node:internal/modules/cjs/loader:628:14)
    at Module._findPath (node:internal/modules/cjs/loader:718:31)
    at Module._resolveFilename (node:internal/modules/cjs/loader:1205:27)
    at Module._load (node:internal/modules/cjs/loader:1045:27)
    at TracingChannel.traceSync (node:diagnostics_channel:315:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:215:24)
    at Module.require (node:internal/modules/cjs/loader:1304:12)
    at require (node:internal/modules/helpers:123:16)

Running a build fixes that:

$ npm run build

# ... build output

 $ npm run lint

> [email protected] lint
> eslint .

$ |


```shell
npm run lint
```

### Type Checking

This project is written in JavaScript and uses [TypeScript](https://www.typescriptlang.org) to validate types declared in JSDoc comments.

```shell
npm run tsc
```

Add `--watch` to run in a "watch" mode:

```shell
npm run tsc -- --watch
```
2 changes: 2 additions & 0 deletions package.json
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Expand Up @@ -8,6 +8,7 @@
"build": "node scripts/build.js",
"build:readme": "node tools/update-readme.js",
"lint": "eslint .",
"tsc": "tsc",
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"lint:fix": "eslint --fix .",
"fmt": "prettier --write .",
"fmt:check": "prettier --check .",
Expand All @@ -27,6 +28,7 @@
"!(*.{js,ts})": "prettier --write --ignore-unknown"
},
"devDependencies": {
"@types/mocha": "^10.0.7",
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[Explanation] This isn't strictly necessary with "noImplicitAny": false. But it's just good to have types for dependencies in general.

"common-tags": "^1.8.2",
"eslint": "^9.11.1",
"eslint-config-eslint": "^11.0.0",
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10 changes: 2 additions & 8 deletions packages/compat/tsconfig.json
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@@ -1,13 +1,7 @@
{
"extends": "../../tsconfig.base.json",
"files": ["src/index.js"],
"compilerOptions": {
"declaration": true,
"emitDeclarationOnly": true,
"allowJs": true,
"checkJs": true,
"outDir": "dist/esm",
"target": "ES2022",
"moduleResolution": "NodeNext",
"module": "NodeNext"
"outDir": "dist/esm"
}
}
10 changes: 2 additions & 8 deletions packages/config-array/tsconfig.json
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@@ -1,13 +1,7 @@
{
"extends": "../../tsconfig.base.json",
"files": ["src/index.js"],
"compilerOptions": {
"declaration": true,
"emitDeclarationOnly": true,
"allowJs": true,
"checkJs": true,
"outDir": "dist/esm",
"target": "ES2022",
"moduleResolution": "NodeNext",
"module": "NodeNext"
"outDir": "dist/esm"
}
}
10 changes: 2 additions & 8 deletions packages/core/tsconfig.json
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@@ -1,13 +1,7 @@
{
"extends": "../../tsconfig.base.json",
"files": ["src/types.ts"],
"compilerOptions": {
"declaration": true,
"emitDeclarationOnly": true,
"allowJs": true,
"checkJs": true,
"outDir": "dist/esm",
"target": "ES2022",
"moduleResolution": "NodeNext",
"module": "NodeNext"
"outDir": "dist/esm"
}
}
10 changes: 2 additions & 8 deletions packages/migrate-config/tsconfig.json
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@@ -1,13 +1,7 @@
{
"extends": "../../tsconfig.base.json",
"files": ["src/migrate-config-cli.js"],
"compilerOptions": {
"declaration": true,
"emitDeclarationOnly": true,
"allowJs": true,
"checkJs": true,
"outDir": "dist/esm",
"target": "ES2022",
"moduleResolution": "NodeNext",
"module": "NodeNext"
"outDir": "dist/esm"
}
}
10 changes: 2 additions & 8 deletions packages/object-schema/tsconfig.json
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@@ -1,13 +1,7 @@
{
"extends": "../../tsconfig.base.json",
"files": ["src/index.js"],
"compilerOptions": {
"declaration": true,
"emitDeclarationOnly": true,
"allowJs": true,
"checkJs": true,
"outDir": "dist/esm",
"target": "ES2022",
"moduleResolution": "NodeNext",
"module": "NodeNext"
"outDir": "dist/esm"
}
}
1 change: 1 addition & 0 deletions packages/plugin-kit/package.json
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Expand Up @@ -47,6 +47,7 @@
"license": "Apache-2.0",
"devDependencies": {
"@eslint/core": "^0.6.0",
"@types/levn": "^0.4.0",
"c8": "^9.1.0",
"mocha": "^10.4.0",
"rollup": "^4.16.2",
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8 changes: 0 additions & 8 deletions packages/plugin-kit/src/@types/levn.d.ts
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This file was deleted.

4 changes: 2 additions & 2 deletions packages/plugin-kit/src/config-comment-parser.js
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Expand Up @@ -9,7 +9,6 @@
// Imports
//------------------------------------------------------------------------------

// @ts-ignore -- don't feel like fighting with TypeScript right now
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import levn from "levn";

//-----------------------------------------------------------------------------
Expand Down Expand Up @@ -123,7 +122,8 @@ export class ConfigCommentParser {
parseJSONLikeConfig(string) {
// Parses a JSON-like comment by the same way as parsing CLI option.
try {
const items = levn.parse("Object", string) || {};
const items =
/** @type {RulesConfig} */ (levn.parse("Object", string)) || {};
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Should the parens enclose the entire expression?

Suggested change
/** @type {RulesConfig} */ (levn.parse("Object", string)) || {};
/** @type {RulesConfig} */ (levn.parse("Object", string) || {});

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@JoshuaKGoldberg JoshuaKGoldberg Sep 27, 2024 •
edited
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Great question: either works, but as-is is more precise.

From https://www.typescriptlang.org/docs/handbook/jsdoc-supported-types.html#casts, @type JSDoc annotations act as assertions1 on the parenthesized expression. Right now that expression includes only the levn.parse(...) call. Essentially it's (levn.parse(...) as RulesConfig) || {}.

I prefer that because, similar try/catch, IMO it's best to have assertions act on as small a range as possible. They're an inherently dangerous, use-at-your-own-risk feature.

The end result is the same here: RulesConfig | {} (note: that's the union type, not a || typo) collapses down to just RulesConfig in the type system.

Footnotes

  1. Normally in the TS docs called assertions (suggesting being purely in the type system) not casts (suggesting being a runtime operation). I was surprised to see it listed as a cast here... ↩

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Thanks for the explanation. I guess I was reading this as "assign a value that is a RulesConfig or an empty object", meaning that the type of items isn't guaranteed to be RulesConfig. Maybe that's okay?

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From the types perspective, an empty object is RulesConfig. Record<string, RuleConfig> means roughly "all keys are string; all values are RuleConfig". If you have no keys, then great, that satisfies the shape.

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Ah gotcha. Thanks for explaining 👍


/*
* When the configuration has any invalid severities, it should be completely
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11 changes: 2 additions & 9 deletions packages/plugin-kit/tsconfig.json
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@@ -1,15 +1,8 @@
{
"extends": "../../tsconfig.base.json",
"files": ["src/index.js"],
"compilerOptions": {
"declaration": true,
"emitDeclarationOnly": true,
"allowJs": true,
"checkJs": true,
"outDir": "dist/esm",
"target": "ES2022",
"moduleResolution": "NodeNext",
"module": "NodeNext",
"strict": true,
"typeRoots": ["node_modules/@types", "src/@types"]
"strict": true
}
}
4 changes: 2 additions & 2 deletions scripts/build.js
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Expand Up @@ -73,8 +73,8 @@ async function calculatePackageDependencies(packageDirs) {
}

/**
* Creates an array of directories to be built in order to sastify dependencies.
* @param {Map<string,{name:string,dir:string,dependencies:Set<string>}} dependencies The
* Creates an array of directories to be built in order to satisfy dependencies.
* @param {Map<string,{name:string,dir:string,dependencies:Set<string>}>} dependencies The
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[Fix] Typo: missing > closing out Map.

* dependencies between packages.
* @returns {Array<string>} An array of directories to be built in order.
*/
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11 changes: 11 additions & 0 deletions tsconfig.base.json
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@@ -0,0 +1,11 @@
{
"compilerOptions": {
"allowJs": true,
"checkJs": true,
"declaration": true,
"emitDeclarationOnly": true,
"module": "NodeNext",
"moduleResolution": "NodeNext",
"target": "ES2022"
}
}
8 changes: 8 additions & 0 deletions tsconfig.json
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{
"extends": "./tsconfig.base.json",
"include": ["packages/*/src"],
"compilerOptions": {
"emitDeclarationOnly": false,
"noEmit": true
}
}