TSC fails to emit required files when run below node_modules
See original GitHub issueTypeScript Version: 3.2.0-dev.20181107
Search Terms: node_modules
Code
/tmp/node_modules/tsc-test/tsconfig.json
{
"compilerOptions": {
"outDir": "dist"
},
"files": [
"src/index.ts"
]
}
/tmp/node_modules/tsc-test/src/index.ts
import { A } from './A';
export const main = () => {
console.log('A=', A);
};
/tmp/node_modules/tsc-test/src/A.ts
export const A = 'A';
Expected behavior:
Output files:
/tmp/node_modules/tsc-test/dist/index.js
/tmp/node_modules/tsc-test/dist/A.js
Actual behavior:
Output files:
/tmp/node_modules/tsc-test/dist/index.js
"use strict";
exports.__esModule = true;
var A_1 = require("./A");
exports.main = function () {
console.log('A=', A_1.A);
};
No A.js
is output
Notes:
I wanted to build a typescript project as part of an npm postinstall script, to enable installation from npm or from git. In the case of installation from npmjs, dist/
will already exist. In the case of installation from git, dist/
will be missing and build will be run.
After setting this up, I noticed that only files listed in my tsconfig files
list were being emitted when installing from git. I looked around for tsconfig or tsc options that may change this behavior, but realized it probably had to do with 'node_modules'
being in the path.
I debugged the issue by modifying the built tsc.js
. In my case, the problematic code is in nodeModuleNameResolverWorker/tryResolve
, specifically here:
const { path: candidate, parts } = normalizePathAndParts(combinePaths(containingDirectory, moduleName));
const resolved = nodeLoadModuleByRelativeName(extensions, candidate, /*onlyRecordFailures*/ false, state, /*considerPackageJson*/ true);
// Treat explicit "node_modules" import as an external library import.
return resolved && toSearchResult({ resolved, isExternalLibraryImport: contains(parts, "node_modules") });
The call to contains(parts, "node_modules")
should likely consider the project root directory, and ignore "node_modules"
in the path parts above the root.
Issue Analytics
- State:
- Created 5 years ago
- Comments:10 (6 by maintainers)
Top GitHub Comments
Right, what I’m getting at is that if the project root is
/a/b/node_modules/c/d
, anything beneath/a/b/node_modules/c/d
should be built./a/b/node_modules/c
shouldn’t be,/a/b/node_modules/c/d/node_modules/e
shouldn’t be.Since @weswigham seems to have some thoughts around this, we can discuss this in a backlog slog in the future