Importing a file outside of the project folder causes: Emit skipped error

[DustinJSilk]

Im trying to import a file outside of the project. It's a shared file between the frontend and the server.

When i try import it it throws this error:

node_modules/ts-node/src/index.ts:370
        throw new TypeError(`${relative(cwd, fileName)}: Emit skipped`)
              ^
TypeError: project/my_file.ts: Emit skipped
    at getOutput (/Users/.../node_modules/ts-node/src/index.ts:370:15)
    at Object.compile (/Users/.../node_modules/ts-node/src/index.ts:558:11)
    at Module.m._compile (/Users/.../node_modules/ts-node/src/index.ts:439:43)
    at Module._extensions..js (internal/modules/cjs/loader.js:713:10)
    at Object.require.extensions.(anonymous function) [as .ts] (/Users/.../node_modules/ts-node/src/index.ts:442:12)
    at Module.load (internal/modules/cjs/loader.js:612:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:551:12)
    at Function.Module._load (internal/modules/cjs/loader.js:543:3)
    at Module.require (internal/modules/cjs/loader.js:650:17)
    at require (internal/modules/cjs/helpers.js:20:18)

I'm able to import it from my angular project which is a sibling.

I've tried adding the file to my tsconfig under includes and files. This is what my tsconfig looks like:

{
  "extends": "../tsconfig.json",
  "compilerOptions": {
    "outDir": "../../dist/backend",
    "rootDir": "./",
    "module": "commonjs",
    "types": [
      "node"
    ]
  },
  "files": [
    "../lib/shared_file_to_import.ts" // Can't import this file
  ],
  "include": [
    "./**/*.ts"
  ]
}

And this is my tsconfig file that the project extends:

{
  "compileOnSave": false,
  "extends": "./node_modules/gts/tsconfig-google.json",
  "compilerOptions": {
    "baseUrl": "./",
    "rootDir": ".",
    "outDir": "./dist",
    "sourceMap": true,
    "strict": true,
    "strictPropertyInitialization": false,
    "declaration": false,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "noImplicitAny": true,
    "target": "es5",
    "strictNullChecks": true,
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2017",
      "dom"
    ]
  },
  "include": [
    "./lib/shared_file_to_import.ts"
  ]
}

[blakeembrey]

@DustinJSilk Do you have an example that could be referenced? Also, what version of ts-node and arguments are you using?

[DustinJSilk]

I was using version 7.0.1, with typescript 2.9.2 and without any arguments so it would have been default.

I can upload an example tomorrow evening and will send you a link. I switched to compiling down with just tsc in the meantime and dont have a branch with the original ts-node setup at the moment

[bennycode]

I got the "Emit skipped" error when trying to compile TypeScript code which was not under the 'rootDir' (tsconfig.json).

[blakeembrey]

@bennyn Thanks for following up! Can you include the version (ts-node and typescript), your tsconfig.json and the file your tried importing? Does this compile with tsc?

[bennycode]

@blakeembrey I have used the latest and greatest:

• typescript v3.3.3
• ts-node v8.0.2
• mocha v5.2.0

My tsconfig.json looks like this:

{
  "compilerOptions": {
    "module": "commonjs",
    "moduleResolution": "node",
    "outDir": "dist",
    "rootDir": "src",
    "target": "es5"
  },
  "exclude": [
    "dist",
    "node_modules"
  ]
}

I tried to use ts-node for my mocha tests which were located in ./test but my rootDir was set to ./src so the following command failed with the message "Emit skipped":

mocha --bail --require ts-node/register --reporter spec test/main/**/*.ts

I have to admit that the error message sounded a little cryptic to me so I tried to run tsc and tsc failed too and gave me the hint that some of my TS files (the test code) is not in my rootDir, so I moved my tests from ./test to ./src/test and adjusted my mocha script:

mocha --bail --require ts-node/register --reporter spec src/test/main/**/*.ts

Now everything works like expected. 😃

[rosskevin]

From experimentation this appears to be happening when using ts-node --files with rootDir. I suspect related to the explanation here microsoft/TypeScript#9858

[Robert-Baindourov]

I am getting this same error within my project.
I don't even have a 'rootDir' in my tsconfig.json file

{
    "compilerOptions": {
        "allowJs": true,
        "target": "es2015",
        "moduleResolution": "node",
        "allowSyntheticDefaultImports": true,
        "module": "es2015",
        "sourceMap": false,
        "listEmittedFiles": true,
        "alwaysStrict": true,
        "esModuleInterop": true,
        "resolveJsonModule": true,
        "skipLibCheck": true
    },
    "include": [
        "lib/**/*",
        "bin/*",
        "tests/*.test.*"
    ],
    "exclude": [
        "node_modules",
    ]
}

Simply tried to do a

USWHBML00208269:umgc_node_api baindor$ node --experimental-modules -r esm -r ts-node/register ./bin/launch.ts

/Users/baindor/projects/umgc_node_api/node_modules/ts-node/src/index.ts:365
        throw new TypeError(`${relative(cwd, fileName)}: Emit skipped`)
              ^
/Users/baindor/projects/umgc_node_api/node_modules/ts-node/src/index.ts:1
TypeError: lib/HealthChecks/LinkHealthCheck.js: Emit skipped
    at getOutput (/Users/baindor/projects/umgc_node_api/node_modules/ts-node/src/index.ts:365:15)
    at Object.compile (/Users/baindor/projects/umgc_node_api/node_modules/ts-node/src/index.ts:395:32)
    at Object.m._compile (/Users/baindor/projects/umgc_node_api/node_modules/ts-node/src/index.ts:473:43)
    at Module._extensions..js (internal/modules/cjs/loader.js:879:10)
    at Object.require.extensions.<computed> [as .js] (/Users/baindor/projects/umgc_node_api/node_modules/ts-node/src/index.ts:476:12)

It's strange because we have this working with esnext as the compile target and module target and then using gulp and babel as such:

gulp && pm2-runtime start --node-args='--experimental-modules --use_strict --no-warnings --require=@babel/register' bin/launch.js

But I want to skip the gulp step, and babel altogether and compile directly down to es2015 from typescript.

[Robert-Baindourov]

I found a combination that worked for me, something about allowJs broke it:
tsconfig.json

{
    "compilerOptions": {
        "allowJs": false,
        "target": "ES6",
        "moduleResolution": "node",
        "allowSyntheticDefaultImports": true,
        "module": "commonjs",
        "sourceMap": false,
        "listEmittedFiles": true,
        "alwaysStrict": true,
        "esModuleInterop": true,
        "resolveJsonModule": true,
        "skipLibCheck": true
    },
    "include": [
        "lib/**/*",
        "bin/*",
        "tests/*.test.*"
    ],
    "exclude": [
        "node_modules",
    ]
}

[vongohren]

Im getting this error when I just try to add typeRoots because of this issue: #745

I add
"typeRoots": ["./src/types","../../node_modules/@types"]

I have this tsconfig:

{
  "extends": "../../tsconfig.json",
  "compilerOptions": {
    "outDir": "./dist",
    "moduleResolution": "node",
    "jsx": "react",
    "esModuleInterop": true,
    "typeRoots": ["./src/types","../../node_modules/@types"]
  },
  "include": [
    "./src"
  ],
  "exclude": [
    "../../node_modules", "node_modules"
  ],
}

and this as root

{
  "compilerOptions": {
      "allowJs": true,
      "module": "commonjs",
      "target": "ES2017",
      "sourceMap": true,
      "strict": true,
      "noFallthroughCasesInSwitch": true,
      "noImplicitReturns": true,
      "noEmitOnError": true
  },
  "exclude": [
      "node_modules"
  ]
}

[ncoder]

FYI: just in case this is useful some someone. using mocha + typescript + node, I received the same error, and it was because I had a .js file that got written next to the source .ts file. Presumably, even though ts-node isn't writing the .js files out, it detected that one was there and stopped.

[jordanrastrick]

Also leaving a comment in case it is useful to someone: this error can also occur if you have "allowJs": true and have a stray *.js file that corresponds to a *.ts file in your project.

[bluelovers]

i get Emit skipped error when "allowJs": true is true too

https://github.com/bluelovers/is-req-https

[marchand-software]

Also leaving a comment in case it is useful to someone: this error can also occur if you have "allowJs": true and have a stray *.js file that corresponds to a *.ts file in your project.

Any solution to this other than turning off allowJs? Would like to compile both versions (.ts & .js) and use each where appropriate. Migrating from JavaScript to TypeScript...