tsc：尽管尝试了一切，但在heroku中未找到错误

Question

我正在尝试将一个简单的nodejs应用程序部署到heroku，但出现上述错误。尝试根据此处的可用答案解决该问题，但似乎没有任何效果。这是我已经尝试过的：

1. 在 dyno 上安装了 typescript buildpack

   heroku buildpacks: heroku/nodejs zidizei/typescript

2. 我的 package.json 在 devDependency 中有 typescript，而 script 在构建参数中有 tsc

  ...
  "main": "index.js",
  "dependencies": {
    "cors": "^2.8.5",
    "express": "^4.18.1",
    "rimraf": "^5.0.5",
  },
  "devDependencies": {
    "@types/express": "^4.17.14",
    "@types/node": "^18.11.0"
    "nodemon": "^2.0.19",
    "ts-node": "^10.9.1",
    "typescript": "^4.7.4"
  },
  "scripts": {
    "start": "node build/server.js",
    "postinstall": "tsc",
    "dev": "nodemon server.ts",
    "start:server": "ts-node server.ts",
    "test": "echo \"Error: no test specified\" && exit 1"
  }
...

3. 我的 tsconfig.json 也与我在这里看到的答案非常匹配

{
   "ts-node": {
   "compilerOptions": {
     "module": "commonjs"
   }
 },
 "compilerOptions": {
   "module": "commonjs",
   "esModuleInterop": true,
   "target": "es6",
   "rootDir": "./",
   "outDir": "./build",
   "strict": true,
   "experimentalDecorators": true,
   "emitDecoratorMetadata": true,
   "strictPropertyInitialization": false,
   "moduleResolution":"node",
   "skipLibCheck": true
 },
 "files": [ "./utils/index.d.ts" ]
}

我在构建步骤中遇到错误：

-----> TypeScript app detected
-----> Creating build environment
-----> Installing development dependencies
       Installing development node modules (npm)
       npm WARN invalid config only="dev" set in command line options
       npm WARN invalid config Must be one of: null, prod, production
       
       > [email protected] postinstall
       > npm run build
       
       
       > [email protected] build
       > tsc
       
       sh: 1: tsc: not found
       npm notice
       npm notice New minor version of npm available! 10.1.0 -> 10.2.3
       npm notice Changelog: <https://github.com/npm/cli/releases/tag/v10.2.3>
       npm notice Run `npm install -g [email protected]` to update!
       npm notice
       npm ERR! code 127
       npm ERR! path /tmp/build_5663ceba
       npm ERR! command failed
       npm ERR! command sh -c npm run build

用尽所有关于我可能做错的事情的想法，并寻求同样的启发。还有其他我应该尝试的事情吗？

提前致谢！

Answer 1

通过将 tsc 放入 build 而不是 postinstall 来使其工作，就像 Heroku 调用 npm start build 一样。在安装后阶段，似乎不再可以访问 devDependency。

...
  "scripts": {
    "start": "node build/server.js",
    "build": "tsc",
    "dev": "nodemon server.ts",
    "start:server": "ts-node server.ts",
    "test": "echo \"Error: no test specified\" && exit 1"
  }