TypeScript Version: 3.5.0-dev.20190413, 3.4.3

Search Terms:

tsbuildinfo, incremental build, rootDir

Code

For reproduce test project https://github.com/ikokostya/ts-bugs can be used:

git clone https://github.com/ikokostya/ts-bugs cd ts-bugs npm install npx tsc 

The test project has the following file structure:

src/ lib/ foo.ts tests/ foo.test.ts tsconfig.json 

tsconfig.json content:

{ "compilerOptions": { "module": "commonjs", "moduleResolution": "node", "target": "es2017", "lib": ["es2017"], "strict": true, "noEmitOnError": true, "sourceMap": true, "rootDir": "src", "incremental": true, "outDir": "out" }, "include": [ "src/**/*" ] }

Expected behavior:

After compilation tsbuildinfo file will be placed in out directory, i.e. ./out/tsconfig.tsbuildinfo.

Actual behavior:

tsbuildinfo file is placed in project root directory, i.e. ./tsconfig.tsbuildinfo.

Playground Link:

Related Issues:
#29161
#30457