Use --experimental-transform-types

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
           fetch-depth: 1
       - uses: actions/setup-node@v3
         with:
-          node-version: 21
+          node-version: 22
       - uses: pnpm/action-setup@v2
         with:
           version: latest

.github/workflows/deploy-web.yml

@@ -12,7 +12,7 @@ jobs:
           fetch-depth: 1
       - uses: actions/setup-node@v3
         with:
-          node-version: 21
+          node-version: 22
       - uses: pnpm/action-setup@v2
         with:
           version: latest

.github/workflows/version-or-publish.yml

@@ -20,7 +20,7 @@ jobs:
           fetch-depth: 1
       - uses: actions/setup-node@v3
         with:
-          node-version: 21
+          node-version: 22
       - uses: pnpm/action-setup@v2
         with:
           version: latest

package.json

@@ -11,17 +11,18 @@
     "build": "pnpm tsc && pnpm -r build",
     "format": "prettier --write \"**/*.{ts,json,css}\"",
     "test": "pnpm -r test",
+    "test-js": "pnpm tsc && pnpm -r test-js",
     "check-dts": "tsc -p tsconfig.check-dts.json",
     "start": "pnpm --filter @arethetypeswrong/web start",
     "version": "changeset version && pnpm install --lockfile-only"
   },
   "devDependencies": {
     "@changesets/cli": "^2.27.1",
     "prettier": "^3.0.3",
-    "typescript": "5.6.1-rc"
+    "typescript": "npm:@typescript-deploys/[email protected]"
   },
   "engines": {
-    "node": ">=18",
+    "node": ">=22",
     "pnpm": ">=8"
   }
 }

packages/cli/package.json

@@ -40,7 +40,8 @@
     "tsc": "tsc -b",
     "local:install": "npm install -g .",
     "local:uninstall": "npm uninstall -g @arethetypeswrong/cli",
-    "test": "tsc -b test && node --test 'test/dist/**/*.test.js'",
+    "test": "node --experimental-transform-types --conditions=@arethetypeswrong/source --test 'test/**/*.test.ts'",
+    "test-js": "node --experimental-transform-types --test 'test/**/*.test.ts'",
     "prepack": "pnpm tsc"
   },
   "type": "module",

packages/cli/src/getExitCode.ts

@@ -1,6 +1,6 @@
 import type { CheckResult } from "@arethetypeswrong/core";
-import { problemFlags } from "./problemUtils.js";
-import type { RenderOptions } from "./render/index.js";
+import { problemFlags } from "./problemUtils.ts";
+import type { RenderOptions } from "./render/index.ts";
 
 export function getExitCode(analysis: CheckResult, opts?: RenderOptions): number {
   if (!analysis.types) {

packages/cli/src/index.ts

@@ -10,11 +10,11 @@ import { readFile, stat, unlink } from "fs/promises";
 import { createRequire } from "module";
 import path from "path";
 import readline from "readline";
-import { problemFlags } from "./problemUtils.js";
-import { readConfig } from "./readConfig.js";
-import * as render from "./render/index.js";
+import { problemFlags } from "./problemUtils.ts";
+import { readConfig } from "./readConfig.ts";
+import * as render from "./render/index.ts";
 import { major, minor } from "semver";
-import { getExitCode } from "./getExitCode.js";
+import { getExitCode } from "./getExitCode.ts";
 
 const packageJson = createRequire(import.meta.url)("../package.json");
 const version = packageJson.version;
@@ -74,8 +74,8 @@ particularly ESM-related module resolution issues.`,
   .option("--exclude-entrypoints <entrypoints...>", "Specify entrypoints to exclude from checking.")
   .option(
     "--entrypoints-legacy",
-    'In packages without the `exports` field, every file is an entry point. Specifying this option ' +
-    'only takes effect when no entrypoints are automatically detected, or explicitly provided with other options.'
+    "In packages without the `exports` field, every file is an entry point. Specifying this option " +
+      "only takes effect when no entrypoints are automatically detected, or explicitly provided with other options.",
   )
   .addOption(
     new Option("--ignore-rules <rules...>", "Specify rules to ignore").choices(Object.values(problemFlags)).default([]),

packages/cli/src/readConfig.ts

@@ -1,6 +1,6 @@
 import { Command } from "commander";
 import { readFile } from "fs/promises";
-import { problemFlags } from "./problemUtils.js";
+import { problemFlags } from "./problemUtils.ts";
 
 export async function readConfig(program: Command, alternate = ".attw.json") {
   try {

packages/cli/src/render/index.ts

@@ -1,4 +1,4 @@
-import type { problemFlags } from "../problemUtils.js";
+import type { problemFlags } from "../problemUtils.ts";
 
 export type Format = "auto" | "table" | "table-flipped" | "ascii" | "json";
 export interface RenderOptions {
@@ -9,5 +9,5 @@ export interface RenderOptions {
   emoji?: boolean;
 }
 
-export * from "./typed.js";
-export * from "./untyped.js";
+export * from "./typed.ts";
+export * from "./untyped.ts";

packages/cli/src/render/typed.ts

@@ -5,9 +5,9 @@ import chalk from "chalk";
 import Table, { type GenericTable, type HorizontalTableRow } from "cli-table3";
 import { marked } from "marked";
 import TerminalRenderer from "marked-terminal";
-import { moduleKinds, problemFlags, resolutionKinds } from "../problemUtils.js";
-import { asciiTable } from "./asciiTable.js";
-import type { RenderOptions } from "./index.js";
+import { moduleKinds, problemFlags, resolutionKinds } from "../problemUtils.ts";
+import { asciiTable } from "./asciiTable.ts";
+import type { RenderOptions } from "./index.ts";
 
 export async function typed(
   analysis: core.Analysis,

packages/cli/test/snapshots.test.ts

@@ -1,9 +1,9 @@
-import { access, readFile, writeFile } from "fs/promises";
-import { execSync, type SpawnSyncReturns } from "child_process";
 import assert from "node:assert";
+import { spawnSync } from "node:child_process";
+import { access, readFile, writeFile } from "node:fs/promises";
 import { after, describe, test } from "node:test";
 
-const attw = `node ${new URL("../../dist/index.js", import.meta.url).pathname}`;
+const attw = new URL("../src/index.ts", import.meta.url).pathname;
 const updateSnapshots = process.env.UPDATE_SNAPSHOTS || process.env.U;
 const testFilter = (process.env.TEST_FILTER || process.env.T)?.toLowerCase();
 
@@ -34,11 +34,11 @@ const tests = [
 
   [
     "[email protected]",
-    `--definitely-typed ${new URL("../../../core/test/fixtures/@[email protected]", import.meta.url).pathname}`,
+    `--definitely-typed ${new URL("../../core/test/fixtures/@[email protected]", import.meta.url).pathname}`,
   ],
   [
     "[email protected]",
-    `--definitely-typed ${new URL("../../../core/test/fixtures/@[email protected]", import.meta.url).pathname}`,
+    `--definitely-typed ${new URL("../../core/test/fixtures/@[email protected]", import.meta.url).pathname}`,
   ],
 
   ["[email protected]", "--entrypoints-legacy --ignore-rules=cjs-only-exports-default"],
@@ -68,21 +68,22 @@ describe("snapshots", async () => {
     }
 
     test(fixture, async () => {
-      const tarballPath = new URL(`../../../core/test/fixtures/${tarball}`, import.meta.url).pathname;
-      let stdout;
-      let stderr = "";
-      let exitCode = 0;
-      try {
-        stdout = execSync(`${attw} ${tarballPath} ${options ?? defaultOpts}`, {
+      const tarballPath = new URL(`../../core/test/fixtures/${tarball}`, import.meta.url).pathname;
+      const {
+        stdout,
+        stderr,
+        status = 1,
+      } = spawnSync(
+        process.execPath,
+        [...process.execArgv, attw, tarballPath, ...(options ?? defaultOpts).split(" ")],
+        {
           encoding: "utf8",
-          env: { ...process.env, FORCE_COLOR: "0" },
-        });
-      } catch (error) {
-        stdout = (error as SpawnSyncReturns<string>).stdout;
-        stderr = (error as SpawnSyncReturns<string>).stderr;
-        exitCode = (error as SpawnSyncReturns<string>).status ?? 1;
-      }
-      const snapshotURL = new URL(`../snapshots/${fixture}.md`, import.meta.url);
+          stdio: "pipe",
+          env: { ...process.env, FORCE_COLOR: "0", NODE_OPTIONS: "--no-warnings" },
+        },
+      );
+
+      const snapshotURL = new URL(`snapshots/${fixture}.md`, import.meta.url);
       // prettier-ignore
       const expectedSnapshot = [
         `# ${fixture}`,
@@ -94,7 +95,7 @@ describe("snapshots", async () => {
         "",
         "```",
         "",
-        `Exit code: ${exitCode}`,
+        `Exit code: ${status}`,
       ].join("\n");
 
       if (

packages/cli/test/tsconfig.json

@@ -1,11 +1,5 @@
 {
-  "extends": "../../../tsconfig.base.json",
-  "compilerOptions": {
-    "lib": ["es2019"],
-    "module": "nodenext",
-    "outDir": "dist",
-    "types": ["node"]
-  },
+  "extends": "../../../tsconfig.test.json",
   "references": [
     {
       "path": ".."

packages/cli/tsconfig.json

@@ -2,6 +2,7 @@
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
     "module": "nodenext",
+    "rewriteRelativeImportExtensions": true,
     "rootDir": "src",
     "types": ["node", "ts-expose-internals"],
     "outDir": "./dist",

packages/core/package.json

@@ -19,29 +19,33 @@
   },
   "scripts": {
     "tsc": "tsc",
-    "test": "tsc -b test && node --test 'test/dist/**/*.test.js'",
+    "test": "node --experimental-transform-types --conditions=@arethetypeswrong/source --test 'test/**/*.test.ts'",
+    "test-js": "node --experimental-transform-types --test 'test/**/*.test.ts'",
     "snapshot": "node scripts/createSnapshotFixture.js",
     "prepack": "pnpm tsc"
   },
   "type": "module",
   "imports": {
-    "#internal/*": "./dist/internal/*"
+    "#internal/*": {
+      "@arethetypeswrong/source": "./src/internal/*.ts",
+      "default": "./dist/internal/*.js"
+    }
   },
   "exports": {
     ".": {
-      "development": "./src/index.ts",
+      "@arethetypeswrong/source": "./src/index.ts",
       "default": "./dist/index.js"
     },
     "./types": {
-      "development": "./src/types.ts",
+      "@arethetypeswrong/source": "./src/types.ts",
       "default": "./dist/types.js"
     },
     "./utils": {
-      "development": "./src/utils.ts",
+      "@arethetypeswrong/source": "./src/utils.ts",
       "default": "./dist/utils.js"
     },
     "./problems": {
-      "development": "./src/problems.ts",
+      "@arethetypeswrong/source": "./src/problems.ts",
       "default": "./dist/problems.js"
     },
     "./versions": {

packages/core/src/checkPackage.ts

@@ -1,17 +1,17 @@
-import type { Package } from "./createPackage.js";
-import checks from "./internal/checks/index.js";
-import type { AnyCheck, CheckDependenciesContext } from "./internal/defineCheck.js";
-import { createCompilerHosts } from "./internal/multiCompilerHost.js";
+import type { Package } from "./createPackage.ts";
+import checks from "./internal/checks/index.ts";
+import type { AnyCheck, CheckDependenciesContext } from "./internal/defineCheck.ts";
+import { createCompilerHosts } from "./internal/multiCompilerHost.ts";
 import type {
   AnalysisTypes,
   CheckResult,
   EntrypointResolutionAnalysis,
   Problem,
   ProgramInfo,
   ResolutionOption,
-} from "./types.js";
-import { getResolutionOption, visitResolutions } from "./utils.js";
-import { getEntrypointInfo, getModuleKinds, getBuildTools } from "./internal/getEntrypointInfo.js";
+} from "./types.ts";
+import { getResolutionOption, visitResolutions } from "./utils.ts";
+import { getEntrypointInfo, getModuleKinds, getBuildTools } from "./internal/getEntrypointInfo.ts";
 
 export interface CheckPackageOptions {
   /**

packages/core/src/createPackage.ts

@@ -2,7 +2,7 @@ import { untar } from "@andrewbranch/untar.js";
 import { Gunzip } from "fflate";
 import { major, maxSatisfying, minor, valid, validRange } from "semver";
 import ts from "typescript";
-import { parsePackageSpec, type ParsedPackageSpec } from "./utils.js";
+import { parsePackageSpec, type ParsedPackageSpec } from "./utils.ts";
 
 export class Package {
   #files: Record<string, string | Uint8Array> = {};

packages/core/src/index.ts

@@ -1,3 +1,3 @@
-export * from "./checkPackage.js";
-export * from "./createPackage.js";
-export type * from "./types.js";
+export * from "./checkPackage.ts";
+export * from "./createPackage.ts";
+export type * from "./types.ts";

packages/core/src/internal/checks/cjsOnlyExportsDefault.ts

@@ -1,5 +1,5 @@
 import ts from "typescript";
-import { defineCheck } from "../defineCheck.js";
+import { defineCheck } from "../defineCheck.ts";
 
 export default defineCheck({
   name: "CJSOnlyExportsDefault",

packages/core/src/internal/checks/entrypointResolutions.ts

@@ -1,7 +1,7 @@
 import ts from "typescript";
-import type { Problem } from "../../types.js";
-import { resolvedThroughFallback } from "../../utils.js";
-import { defineCheck } from "../defineCheck.js";
+import type { Problem } from "../../types.ts";
+import { resolvedThroughFallback } from "../../utils.ts";
+import { defineCheck } from "../defineCheck.ts";
 
 export default defineCheck({
   name: "EntrypointResolutions",

packages/core/src/internal/checks/exportDefaultDisagreement.ts

@@ -1,7 +1,7 @@
 import ts from "typescript";
-import { defineCheck } from "../defineCheck.js";
-import { getProbableExports, type Export } from "../getProbableExports.js";
-import { getResolutionOption } from "../../utils.js";
+import { defineCheck } from "../defineCheck.ts";
+import { getProbableExports, type Export } from "../getProbableExports.ts";
+import { getResolutionOption } from "../../utils.ts";
 
 const bindOptions: ts.CompilerOptions = {
   target: ts.ScriptTarget.Latest,

packages/core/src/internal/checks/index.ts

@@ -1,9 +1,9 @@
-import cjsOnlyExportsDefault from "./cjsOnlyExportsDefault.js";
-import entrypointResolutions from "./entrypointResolutions.js";
-import exportDefaultDisagreement from "./exportDefaultDisagreement.js";
-import internalResolutionError from "./internalResolutionError.js";
-import moduleKindDisagreement from "./moduleKindDisagreement.js";
-import unexpectedModuleSyntax from "./unexpectedModuleSyntax.js";
+import cjsOnlyExportsDefault from "./cjsOnlyExportsDefault.ts";
+import entrypointResolutions from "./entrypointResolutions.ts";
+import exportDefaultDisagreement from "./exportDefaultDisagreement.ts";
+import internalResolutionError from "./internalResolutionError.ts";
+import moduleKindDisagreement from "./moduleKindDisagreement.ts";
+import unexpectedModuleSyntax from "./unexpectedModuleSyntax.ts";
 
 export default [
   entrypointResolutions,

packages/core/src/internal/checks/internalResolutionError.ts

@@ -1,6 +1,6 @@
 import ts from "typescript";
-import { defineCheck } from "../defineCheck.js";
-import type { InternalResolutionErrorProblem } from "../../types.js";
+import { defineCheck } from "../defineCheck.ts";
+import type { InternalResolutionErrorProblem } from "../../types.ts";
 
 export default defineCheck({
   name: "InternalResolutionError",

packages/core/src/internal/checks/moduleKindDisagreement.ts

@@ -1,5 +1,5 @@
 import ts from "typescript";
-import { defineCheck } from "../defineCheck.js";
+import { defineCheck } from "../defineCheck.ts";
 
 export default defineCheck({
   name: "ModuleKindDisagreement",

packages/core/src/internal/checks/unexpectedModuleSyntax.ts

@@ -1,5 +1,5 @@
 import ts from "typescript";
-import { defineCheck } from "../defineCheck.js";
+import { defineCheck } from "../defineCheck.ts";
 
 export default defineCheck({
   name: "UnexpectedModuleSyntax",

packages/core/src/internal/defineCheck.ts

@@ -1,6 +1,6 @@
-import type { Package } from "../createPackage.js";
-import type { CompilerHosts } from "./multiCompilerHost.js";
-import type { Analysis, Problem, ResolutionKind, ResolutionOption } from "../types.js";
+import type { Package } from "../createPackage.ts";
+import type { CompilerHosts } from "./multiCompilerHost.ts";
+import type { Analysis, Problem, ResolutionKind, ResolutionOption } from "../types.ts";
 
 export interface CheckDependenciesContext<EnumerateFiles extends boolean = false> extends CheckExecutionContext {
   subpath: string;