5.5.0 inheriting outDir: ${configDir} does not automatically exclude it from compilation

[Knagis]

🔎 Search Terms

configDir

🕗 Version & Regression Information

This is likely bug with feature introduced in 5.5.0

⏯ Playground Link

https://github.com/Knagis/importHelpers-5.5.0/tree/exclude-lib

💻 Code

tsconfig.base.json

{
    "compilerOptions": {
        "outDir": "${configDir}/lib",
    },
}

packages/foo/tsconfig.json

{
    "extends": "../../tsconfig.base.json",
    "compilerOptions": {
        "composite": true,
        // "outDir": "lib" // uncomment to make it work
    },
    "include": [
        "**/*.ts"
    ],
}

🙁 Actual behavior

When using outDir: "${configDir}/lib" in the base config, compiling this project results in

error TS5055: Cannot write file 'C:/Code/tslibissue/packages/foo/lib/src/index.d.ts' because it would overwrite input file.

🙂 Expected behavior

Project compiles without errors

Additional information about the issue

If i specify outDir: "lib" or even outDir: "${configDir}/lib" in the derived config, the project compiles without errors as the lib folder seems to be automatically excluded from the compilation.

[Knagis]

Updated/simplified reproduction repo, now it reproduces the stated error as is and uncommenting outDir in the derived tsconfig.json prevents it.

[Knagis]

tsc --showConfig with inherited outDir:

{
    "compilerOptions": {
        "outDir": "./lib",
        "composite": true,
        "declaration": true,
        "incremental": true
    },
    "files": [
        "./lib/src/index.d.ts",
        "./lib/src/index.spec.d.ts",
        "./src/index.spec.ts",
        "./src/index.ts"
    ],
    "include": [
        "**/*.ts"
    ]
}

the same with outDir defined in the derived config:

{
    "compilerOptions": {
        "outDir": "./lib",
        "composite": true,
        "declaration": true,
        "incremental": true
    },
    "files": [
        "./src/index.spec.ts",
        "./src/index.ts"
    ],
    "include": [
        "**/*.ts"
    ],
    "exclude": [
        "lib"
    ]
}

[Knagis]

ok, so the issue isn't really configDir - but that the outDir from base config isn't ever applied as exclude rule. if i specify outDir: "packages/foo/lib" in the root, the same issue appears. Just that before ${configDir} it never made sense to not have outDir specified in the derived config file.

for my added confusion, for some reason, with 5.5.0 it doesn't seem enough to specify outDir in the derived config anymore in my monorepo, i have to instead explicitly, manually add the folder to exclude list, which wasn't needed in 5.4.5. but maybe this is some cache playing a role, even though i build with -f