Usage with node not compatible with "outDir"

[nicojs]

Hi, it seems that tsconfig-paths is not compatible with the "outDir" compiler option.

For example:

$ node -r tsconfig-paths/register dist/index.js
internal/modules/cjs/loader.js:613
    throw err;
    ^

Error: Cannot find module '@common'

Reproduction steps:

// common/index.ts
export const foo = 'bar';

// index.ts
import { foo } from '@common';
console.log(foo);

// tsconfig.json

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "baseUrl": ".",
    "outDir": "dist",
    "paths": {
      "@common": ["./common"]
    }
  }
}

Find files here:

tsconfig-paths-outDir.zip

after you've created the project, use these commands:

$ tsc 
$ node -r tsconfig-paths/register dist/index.js

Proposal

I propose either to use the outDir by default (breaking for ts-node users) or create a separate register hook for node js scenario's.

[nicojs]

As a workaround, I've created this alternative register file.

const tsConfig = require("./tsconfig.json");
const tsConfigPaths = require("tsconfig-paths");
const path = require("path");

tsConfigPaths.register({
  baseUrl: path.resolve(tsConfig.compilerOptions.baseUrl || '', tsConfig.compilerOptions.outDir || ''),
  paths: tsConfig.compilerOptions.paths
});

Thanks for the public api! Love those things!

[swiatek25]

@nicojs your snippet does not work for cases like this:

tsconfig.json:

    "outDir": "dist",
    "baseUrl": ".",
    "paths": {
      "@logger": [ "src/lib/logger" ]
    },
    ...

[dolsem]

@swiatek25 try something like this:

const tsConfig = require('./tsconfig.json');
const tsConfigPaths = require('tsconfig-paths');

const { baseUrl, outDir, paths } = tsConfig.compilerOptions;

const outDirPaths = Object.entries(paths).reduce(
  (outDirPaths, [k, v]) => Object.assign(
    outDirPaths,
    { [k]: v.map(path => path.replace(/^src\//, `${outDir}/`)) }
  ),
  {}
);

tsConfigPaths.register({ baseUrl, paths: outDirPaths });

[ejhayes]

See #114