#22478 TypeScript/JavaScript: `could not locate tsconfig.json's 'extends'` warning when referring to installed module Issue created by huonw Describe the bug

tsconfig.json

/

jsconfig.json

specifies options for TypeScript and IDEs, per

tsconfig.py

, and can be layered via

extends

referring to 'parent' configurations pants/src/python/pants/backend/typescript/tsconfig.py Lines 3 to 8 in</pantsbuild/pants/commit/9e9a8c2ed47a7af2754e837f4aefd6b085b832d5|9e9a8c2> | """tsconfig.json is primarily used by the typescript compiler in order to resolve types during | | ---------------------------------------------------------------------------------------------- | | compilation. The format is also used by IDE:s to provide intellisense. The format is used for | | projects that use only javascript, and is then named jsconfig.json. | | | | See https://code.visualstudio.com/docs/languages/jsconfig | | """ | For instance, these

tsconfig.json

and

package.json

files: { "extends": "@tsconfig/node20/tsconfig.json" } { ..., "dependencies": { "@tsconfig/node20": "^20.1.4", } } However, Pants fails to understand this, resulting in a warning:

14:35:00.38 [WARN] pants could not locate tsconfig.json's 'extends' at @tsconfig/node20/tsconfig.json. Found: ['tsconfig.json'].

Reproducer: cd $(mktemp -d) cat > pants.toml <<EOF [GLOBAL] pants_version = "2.29.0.dev0" backend_packages = [ "pants.backend.experimental.javascript", "pants.backend.experimental.typescript", ] EOF cat > BUILD <<EOF package_json(name="pkg") typescript_sources(name="ts") EOF touch main.ts cat > tsconfig.json <<EOF { "extends": "@tsconfig/node20/tsconfig.json" } EOF cat > package.json <<EOF { "name": "example", "version": "1.0.0", "main": "index.js", "scripts": {}, "author": "", "description": "", "dependencies": { "@tsconfig/node20": "^20.1.6" } } EOF cat > package-lock.json <<EOF { "name": "example", "version": "1.0.0", "lockfileVersion": 3, "requires": true, "packages": { "": { "name": "example", "version": "1.0.0", "dependencies": { "@tsconfig/node20": "^20.1.6" } }, "node_modules/@tsconfig/node20": { "version": "20.1.6", "resolved": "https://registry.npmjs.org/@tsconfig/node20/-/node20-20.1.6.tgz", "integrity": "sha512-sz+Hqx9zwZDpZIV871WSbUzSqNIsXzghZydypnfgzPKLltVJfkINfUeTct31n/tTSa9ZE1ZOfKdRre1uHHquYQ==" } } } EOF # BUG: "[WARN] pants could not locate tsconfig.json's 'extends' at @tsconfig/node20/tsconfig.json. Found: ['tsconfig.json']." pants dependencies main.ts # Baseline: tsc itself is happy # npm install # tsc -p ./tsconfig.json Pants version 2.29.0.dev0 OS macOS Additional info N/A pantsbuild/pants