Vite+ 1.5 がリリースされたので、vp migrate は ts-node をどこまで移行してくれるのか試してみた

// package.json
{
  "name": "ts-app",
  "version": "0.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "seed": "node --loader ts-node/esm/transpile-only scripts/seed.ts",
    "report": "node --loader ts-node/esm scripts/report.ts",
    "test": "node --loader ts-node/esm/transpile-only --test test/price.test.ts"
  },
  "devDependencies": {
    "@types/node": "^26.6.6",
    "ts-node": "^10.9.2",
    "typescript": "^6.0.3"
  }
}

// tsconfig.json
{
  "compilerOptions": {
    "target": "ES2022",
    "module": "NodeNext",
    "moduleResolution": "NodeNext",
    "rootDir": ".",
    "strict": true,
    "allowImportingTsExtensions": true,
    "noEmit": true
  }
}

// src/price.ts
export type Item = { name: string; price: number; quantity: number };

// 消費税率（%）
export enum TaxRate {
  Standard = 10,
  Reduced = 8,
}

// 税込みの合計金額を返す
export function totalWithTax(items: Item[], rate: TaxRate = TaxRate.Standard): number {
  const subtotal = items.reduce((sum, item) => sum + item.price * item.quantity, 0);
  return Math.round((subtotal * (100 + rate)) / 100);
}

// test/price.test.ts
import { test } from "node:test";
import assert from "node:assert/strict";
import { totalWithTax } from "../src/price.ts";

test("税込みの合計金額を返す", () => {
  assert.equal(totalWithTax([{ name: "コーヒー", price: 450, quantity: 2 }]), 990);
});

// scripts/seed.ts（scripts/report.ts も同じ）
import { totalWithTax, type Item } from "../src/price.ts";

const items: Item[] = [
  { name: "コーヒー", price: 450, quantity: 2 },
  { name: "ケーキ", price: 520, quantity: 1 },
];
console.log(`税込み合計: ${totalWithTax(items)} 円`);

pnpm seed
pnpm report
pnpm test

税込み合計: 1562 円
税込み合計: 1562 円
ℹ pass 1
ℹ fail 0

vp upgrade 1.4.0
vp migrate --no-interactive --no-agent --no-editor --no-hooks

◇ Migrated . to Vite+ 1.4.0
• Node 26.13.0  pnpm 12.16.1
✓ Dependencies installed in 1.6s
• 1 config update applied

vp upgrade
vp migrate --no-interactive --no-agent --no-editor --no-hooks

● ts-node scripts detected. Auto-migrating supported commands to Vite+...
◇ Migrated . to Vite+ 1.5.0
• Node 26.13.0  pnpm 12.16.1
✓ Dependencies installed in 1.7s
• 1 config update applied
! Warnings:
  - Kept ts-node in package.json scripts "seed": the Node.js preload needs the ts-node config pinned explicitly; set TS_NODE_PROJECT to its file path before migrating.
  - Kept ts-node in package.json scripts "report": this ts-node command type-checks before execution; `vpx` does not type-check. Keep a separate type-check command before changing this script.
  - Kept ts-node in package.json scripts "test": the Node.js preload needs the ts-node config pinned explicitly; set TS_NODE_PROJECT to its file path before migrating.
  - Kept the ts-node devDependency in package.json: `scripts` in package.json still uses ts-node.

"seed": "TS_NODE_PROJECT=tsconfig.json node --loader ts-node/esm/transpile-only scripts/seed.ts",
"test": "TS_NODE_PROJECT=tsconfig.json node --loader ts-node/esm/transpile-only --test test/price.test.ts"

• ts-node scripts migrated to Vite+
! Warnings:
  - Kept ts-node in package.json scripts "report": this ts-node command type-checks before execution; `vpx` does not type-check. Keep a separate type-check command before changing this script.
  - Kept ts-node in package.json scripts "test": `test/price.test.ts` has runtime bindings from `node:assert/strict` whose CommonJS interop or import/require resolution may change with `vpx`; migrate the bindings manually.
  - Kept the ts-node devDependency in package.json: `scripts` in package.json still uses ts-node.

-    "seed": "TS_NODE_PROJECT=tsconfig.json node --loader ts-node/esm/transpile-only scripts/seed.ts",
+    "seed": "TS_NODE_PROJECT=tsconfig.json node --import vite-plus/register scripts/seed.ts",

error: Running scripts with vpx requires Node.js ^22.18.0 || ^24.11.0 || >=26.0.0 (current: v22.12.0)

// test/price.test.ts
import { test } from "node:test";
import { equal } from "node:assert/strict"; // 変更
import { totalWithTax } from "../src/price.ts";

test("税込みの合計金額を返す", () => {
  equal(totalWithTax([{ name: "コーヒー", price: 450, quantity: 2 }]), 990); // 変更
});

• ts-node scripts migrated to Vite+
! Warnings:
  - Kept ts-node in package.json scripts "report": this ts-node command type-checks before execution; `vpx` does not type-check. Keep a separate type-check command before changing this script.
  - Kept the ts-node devDependency in package.json: `scripts` in package.json still uses ts-node.

-    "seed": "TS_NODE_PROJECT=tsconfig.json node --loader ts-node/esm/transpile-only scripts/seed.ts",
+    "seed": "TS_NODE_PROJECT=tsconfig.json node --import vite-plus/register scripts/seed.ts",
-    "test": "TS_NODE_PROJECT=tsconfig.json node --loader ts-node/esm/transpile-only --test test/price.test.ts"
+    "test": "TS_NODE_PROJECT=tsconfig.json node --import vite-plus/register --test test/price.test.ts"

pnpm seed
pnpm test

$ TS_NODE_PROJECT=tsconfig.json node --import vite-plus/register scripts/seed.ts
税込み合計: 1562 円

✔ 税込みの合計金額を返す (2.970042ms)
ℹ pass 1
ℹ fail 0

// scripts/report.ts
const items: Item[] = [
  { name: "コーヒー", price: 450, quantity: 2 },
  { name: "ケーキ", price: "520", quantity: 1 }, // 型が合わない
];

node --loader ts-node/esm scripts/report.ts
echo $?

node:internal/modules/run_main:111
    triggerUncaughtException(
    ^
[Object: null prototype] {
  Symbol(nodejs.util.inspect.custom): [Function: [nodejs.util.inspect.custom]]
}
1

node --import vite-plus/register scripts/report.ts
vp check

税込み合計: 1562 円

x typescript(TS2322): Type 'string' is not assignable to type 'number'.
  ! typescript(no-floating-promises): Promises must be awaited, add void operator to ignore.
Found 1 error and 1 warning in 5 files (1.0s, 10 threads)

"report": "vp check && node --import vite-plus/register scripts/report.ts"

vp remove ts-node

{
  "name": "ts-app",
  "version": "0.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "seed": "node --import vite-plus/register scripts/seed.ts",
    "report": "vp check && node --import vite-plus/register scripts/report.ts",
    "test": "node --import vite-plus/register --test test/price.test.ts"
  },
  "devDependencies": {
    "@types/node": "^26.6.6",
    "typescript": "^6.0.3",
    "vite-plus": "catalog:"
  }
}

pnpm seed
pnpm report
pnpm test

税込み合計: 1562 円

Found 0 errors and 1 warning in 5 files (229ms, 10 threads)
税込み合計: 1562 円

ℹ pass 1
ℹ fail 0

! Warnings:
  - Kept ts-node in package.json scripts "seed": `scripts/seed.ts` has runtime bindings from `../src/price.ts` whose CommonJS interop or import/require resolution may change with `vpx`; migrate the bindings manually.
  - Kept ts-node in package.json scripts "report": this ts-node command type-checks before execution; `vpx` does not type-check. Keep a separate type-check command before changing this script.
  - Kept ts-node in package.json scripts "test": `test/price.test.ts` has runtime bindings from `../src/price.ts` whose CommonJS interop or import/require resolution may change with `vpx`; migrate the bindings manually.