Vscode-eslint: Latest update appears to have broken nodePath specification

[somewhatabstract]

ESLint is no longer loading modules from the configured nodePath, and therefore fails to load the configured plugins.

VS Code 1.6.x (both 1.6.0 and 1.6.1 had this problem)
ESLint 1.3.1

[dacz]

I'm having the same problem. Breaker. It there way how to install previous version?

[somewhatabstract]

Great question, @dacz. I didn't find a way around this issue yet. I've been trying since it's broken ESLint for me. If I work it out, I'll be sure to post it here. In the meantime, it would be nice to get some acknowledgement that this issue is a legit problem.

[dbaeumer]

@somewhatabstract @dacz

That still works for me in a test setup that looks like this:

• eslint npm module installed under C:\tmp\es-298\node_modules\eslint
• VS Code workspace under P:\mseng\vscode\playgrounds\bugs\es-298
• workspace settings file like this:

{
    "eslint.nodePath": "C:\\tmp\\es-298\\node_modules",
    "eslint.trace.server": "messages"
}

• open VS Code on P:\mseng\vscode\playgrounds\bugs\es-298
• .eslintrc.json file

{
    "env": {
        "browser": true,
        "commonjs": true,
        "es6": true,
        "node": true
    },
    "parserOptions": {
        "ecmaFeatures": {
            "jsx": true
        },
        "sourceType": "module"
    },
    "rules": {
        "no-const-assign": "warn",
        "no-this-before-super": "warn",
        "no-undef": "warn",
        "no-unreachable": "warn",
        "no-unused-vars": "warn",
        "constructor-super": "warn",
        "valid-typeof": "warn"
    }
}

• test.js

function foo() {
    var x;
}

• results in:
  

Do you have any steps to reproduce what you are seeing.

[dbaeumer]

I installed eslint 4.7.1 and tested above under Windows.

[dbaeumer]

And can you enable tracing to verbose ("eslint.trace.server": "verbose") and attach what is printed to the output channel. May be this already gives me a hint what is failing.

[dacz]

I downgraded plugin to 1.2.11 and downgraded eslint (locally installed) to 4.6.1. It worked. Because I need to work I have no courage to try upgrading the plugin.

I suspect that the problem is not the plugin but the eslint 4.7.0.

[somewhatabstract]

For me, we have several ESLint plugins in a sub-folder, so we point node_modules to that. But it is picking up eslint and node_modules from the very first node_modules folder it finds, rather than the path provided.

There are also several eslintrc files involved, but it worked before recent changes and doesn't since updating to latest vscode/eslint add-on. The eslint version we use has not changed.

[dbaeumer]

@somewhatabstract is there anything in the trace when "eslint.trace.server": "verbose" is set that looks suspicious?

[somewhatabstract]

@dbaeumer A few things look strange, but this specifically:

[Trace - 19:46:02] NODE_PATH value is: ./<GIT_REPO>/<PATH_I_SPECIFIED_FOR_NODEPATH>
[Trace - 19:46:02] NODE_PATH value is: /usr/local/lib/node_modules
[Trace - 19:46:02] NODE_PATH value is: ./<GIT_REPO>/<PATH_I_SPECIFIED_FOR_NODEPATH>
[Trace - 19:46:02] NODE_PATH value is: /usr/local/lib/node_modules

And:

[Info  - 19:46:03] ESLint library loaded from: /Users/jeffyates/<GIT_REPO>/<BUILD_LOCATION_NOT_REFERENCED_IN_ESLINTRC>/node_modules/eslint/lib/api.js

Interestingly, BUILD_LOCATION_NOT_REFERENCED_IN_ESLINTRC is the first folder that contains a node_modules folder. Though, I suspect that's a red herring even though the plugin it fails to find is not in that particular node_modules folder, so the error I'm having makes sense if it is trying to resolve it from there.

[dbaeumer]

@somewhatabstract I think I know what it is. Can you do the following to verify it:

• make the nodePath variable in the settings file absolute. This should fix the problem.

The underlying cause of the problem is the support for multiple workspace folders which got added to ESLint 1.3.1. To implement this the ESLint language server is not running on working directory of the workspace anymore (since for n folders there is no common working directory). I need to handle the case that the nodePath setting is relative and make it absolute relative to the file being linted.

@egamma you would need to do the same for tslint.

[egamma]

@dbaeumer thanks, issue on this came in today https://github.com/Microsoft/vscode-tslint/issues/264 😄

[dbaeumer]

Published 1.3.2 which has support for relative nodePath.

[somewhatabstract]

Hmm, I tried an absolute path and it didn't seem to work. Let me try again.

[somewhatabstract]

Ha, I see that 1.3.2 fixes it anyway. Great! Thank you!