CODEWITHSUNDEEP
javascriptnode.jstypescriptnpm
user1935987
user1935987

Reputation: 3347

debugging npm ERR! code ELIFECYCLE npm ERR! errno 1

Asking for an advise on how to debug this compiler error:

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! ******@1.1.0 dev: `NODE_ENV=development ts-node ./src/server.ts`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the ******@1.1.0 dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:

this appears when running ts-node ./src/server.ts or node build/server.js

tsc works without errors.

tsconfig.json:

{
   "compilerOptions": {
      "lib": [
         "es2018",
         "dom",
         "esnext.asynciterable"
      ],
      "target": "es2018",
      "module": "commonjs",
      "outDir": "build",
      "emitDecoratorMetadata": true,
      "experimentalDecorators": true,
      "esModuleInterop": true,
      "sourceMap": false,
      "rootDirs": ["src", "../shared"]
//      "rootDir": "src"
   },
   "exclude": [
      "node_modules",
      "**/*.spec.ts",
      "**/*.test.ts"
   ],
   "references": [
      { "path": "../shared" }
   ]
}

I did made some changes in tsconfig which i suppose cause some imports to fail, however the codebase is huge and i really need some pointers to the exact lines in code which caused the error. especially confusing the tsc runs without errors.

UPDATE:

The issue was with some imports and fixed, However facing similar one again. Know the reason of the current issue - for some reason the imports from shared project (as in here https://www.typescriptlang.org/docs/handbook/project-references.html) are not loaded (despite that they are working in other modules and tsconfig.json is the same with other modules). no particular error, just this npm ERR! code ELIFECYCLE npm ERR! errno 1.

Question:

However the main question of this topic is not the solution of the particularly this problem, but how to debug this kind of import problems where all available log is basically npm ERR! code ELIFECYCLE npm ERR! errno 1. I am facing this kind of issues periodically and every time it takes a lot of time to resolve since the only way to debug i know about is to comment chunks of code which might be associated with the possibly failed imports and sometimes this process could take hours.

Upvotes: 5

Views: 10077

Answers (4)

SelcukBah
SelcukBah

Reputation: 49

I solved this problem first delete to package-lock.json write console - npm test
(if there isn't any problem in npm installing probably problem is in server)

  • npm install -g serve
  • npm run build

the problem is solved.. if you want to use your local you can enter

  • serve -s build thats all- Good Luck :)

Upvotes: 4

user1935987
user1935987

Reputation: 3347

based on @Porcellus answer, was able to fix this issues with NODE_DEBUG=* flag => shown a complete stacktrace of missing modules.

Upvotes: 0

Lajos Arpad
Lajos Arpad

Reputation: 77002

As you have stated, the logs are not very detailed, so I would not invest energy into finding out how to debug an undetailed log file, but rather I would find out how to modify my project so that it does some more detailed logging, after each major step, so if it fails at some point, you will see what was successfully executed, what states it ran through and you will not see the logging that you have planned from the point of crashing.

Upvotes: 0

Porcellus
Porcellus

Reputation: 579

I would start with debugging the compiled script (not minified though) because it removes some intermediate steps between your input and your results. There are multiple methods I tend to debug these issues:

  • First I recommend experimenting with NODE_DEBUG flags like: NODE_DEBUG=module node build/server.js if you suspect the issue is with module loading.
  • You can try node --inspect-brk build/server.js and starting an inspector to step through it (e.g. in Chrome). This is most helpful if your code actually has managed to load, but can sometimes help with custom loaders.

Upvotes: 1

Related Questions