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references are not inherited in tsconfig.json #27098

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@borekb

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@borekb

TypeScript Version: 3.1.0-dev.20180914

Search Terms: tsconfig.json extends references inheritance

It seems that the references key is not inherited via the extends mechanism, which surprised me because the handbook doesn't mention anything special about it.

Demo:

tsconfig.base.json:

{
  "references": [
    { "path": "./some/other/project" }
  ],
  "compilerOptions": {
    "declaration": true,
    "composite": true
  }
}

tsconfig.doesnt-work.json:

{
  "extends": "./tsconfig.base.json"
}

Building tsconfig.doesnt-work.json doesn't build the reference:

$ tsc -b -f -d tsconfig.doesnt-work.json
[11:12:13] A non-dry build would build project 'C:/demo/tsconfig.doesnt-work.json'

tsconfig.works-but-duplicates-references.json:

{
  "extends": "./tsconfig.base.json",
  "references": [
    { "path": "./some/other/project" }
  ],
}

This is a correct build but I had to duplicate the references key:

$ tsc -b -f -d tsconfig.works-but-duplicates-references.json
[11:12:13] A non-dry build would build project 'C:/demo/tsconfig.works-but-duplicates-references.json'
[11:12:13] A non-dry build would build project 'C:/demo/some/other/project/tsconfig.json'

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