Compiler Watch Mode does not re-compile if extended tsconfig changes.

[12wrigja]

TypeScript Version: Version 4.1.0-dev.20200914

Search Terms:
Watch mode, tsserver watch, watch
Code

/// main/tsconfig.json

{"extends": "../configs/tsconfig_editor.json"}

/// configs/tsconfig_editor.json

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node"
  },
  "files": [
          "../main/test.ts"
  ]
}

/// main/test.ts

console.log('hello world');

/// main/test1.ts

console.log('hello world 1');

I ran tsc from the main directory like so:

./node_modules/typescript/bin/tsc -w -p tsconfig.json

test is compiled just fine.

I then edit configs/tsconfig_editor.json and add an entry for test1.ts into the files list.

Expected behavior:

tsc notices that the extended config has changed and recompiles, also compiling test1.ts.

Actual behavior:

tsc does nothing.

My actual issue lies with vscode's language services integration (that doesn't update the language service results when the underlying extended config is changed by our build system), but it seems that this codepath (based on skimming the tsserver source) is broken here too. Looking at the tsserver logs, it seems a watch is setup for main/tsconfig.json but not for the file it extends from.

[sheetalkamat]

Duplicate of #17753

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.