Can't resolve 'child_process'

[sanjitgrover]

I installed jupyter-paths using: npm i jupyter-paths, and I am getting error - Can't resolve 'child_process' at ~node_modules\jupyter-paths when I am linking my extension using: jupyter labextension link .

My extension is built in Typescript.

I have tried many options available on Google -

1. installing child_process and @types/node
2. In package.json added - "browser": { "child_process": false }
3. In tsconfig.json added - "typeRoots": [ "./node_modules/@types" ], But nothing succeeded. Please help. This is the complete log: $ jlpm run build:dev $ jlpm run build $ webpack ModuleNotFoundError: Module not found: Error: Can't resolve 'child_process' in 'c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\jupyter-paths' at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\webpack\lib\Compilation.js:925:10 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\webpack\lib\NormalModuleFactory.js:401:22 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\webpack\lib\NormalModuleFactory.js:130:21 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\webpack\lib\NormalModuleFactory.js:224:22 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\neo-async\async.js:2830:7 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\neo-async\async.js:6877:13 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\webpack\lib\NormalModuleFactory.js:214:25 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:184:12 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:238:5 at eval (eval at create (c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\tapable\lib\HookCodeFactory.js:33:10), :13:1) at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\UnsafeCachePlugin.js:37:5 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:238:5 at eval (eval at create (c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\tapable\lib\HookCodeFactory.js:33:10), :13:1) at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:238:5 at eval (eval at create (c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\tapable\lib\HookCodeFactory.js:33:10), :25:1) at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\DescriptionFilePlugin.js:42:38 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:238:5 at eval (eval at create (c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\tapable\lib\HookCodeFactory.js:33:10), :26:1) at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\ModuleKindPlugin.js:23:37 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:238:5 at eval (eval at create (c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\tapable\lib\HookCodeFactory.js:33:10), :13:1) at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:238:5 at eval (eval at create (c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\tapable\lib\HookCodeFactory.js:33:10), :13:1) at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\forEachBail.js:30:14 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:238:5 at eval (eval at create (c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\tapable\lib\HookCodeFactory.js:33:10), :13:1) at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\UnsafeCachePlugin.js:37:5 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:238:5 at eval (eval at create (c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\tapable\lib\HookCodeFactory.js:33:10), :13:1) at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:238:5 at eval (eval at create (c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\tapable\lib\HookCodeFactory.js:33:10), :25:1) at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\DescriptionFilePlugin.js:42:38 at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:238:5 at eval (eval at create (c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\tapable\lib\HookCodeFactory.js:33:10), :14:1) at c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\enhanced-resolve\lib\Resolver.js:238:5 at eval (eval at create (c:\Users\sanjit.grover\AppData\Local\Programs\Python\Python37\share\jupyter\lab\staging\node_modules\tapable\lib\HookCodeFactory.js:33:10), :25:1) resolve 'child_process' in 'c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\jupyter-paths' Parsed request is a module using description file: c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\jupyter-paths\package.json (relative path: .) Field 'browser' doesn't contain a valid alias configuration resolve as module c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\jupyter-paths\node_modules doesn't exist or is not a directory c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\node_modules doesn't exist or is not a directory c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\node_modules doesn't exist or is not a directory c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\node_modules doesn't exist or is not a directory c:\users\sanjit.grover\appdata\local\programs\python\python37\share\node_modules doesn't exist or is not a directory c:\users\sanjit.grover\appdata\local\programs\python\python37\node_modules doesn't exist or is not a directory c:\users\sanjit.grover\appdata\local\programs\python\node_modules doesn't exist or is not a directory c:\users\sanjit.grover\appdata\local\programs\node_modules doesn't exist or is not a directory c:\users\sanjit.grover\appdata\local\node_modules doesn't exist or is not a directory c:\users\sanjit.grover\appdata\node_modules doesn't exist or is not a directory c:\users\node_modules doesn't exist or is not a directory c:\node_modules doesn't exist or is not a directory looking for modules in c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules using description file: c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\package.json (relative path: ./node_modules) Field 'browser' doesn't contain a valid alias configuration using description file: c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\package.json (relative path: .) no extension Field 'browser' doesn't contain a valid alias configuration looking for modules in c:\users\sanjit.grover\node_modules No description file found Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process is not a file .wasm Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process.wasm doesn't exist .mjs Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process.mjs doesn't exist .js Field 'browser' doesn't contain a valid alias configuration No description file found no extension Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process.js doesn't exist .json Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\node_modules\child_process doesn't exist .wasm Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process.json doesn't exist c:\users\sanjit.grover\node_modules\child_process.wasm doesn't exist .mjs Field 'browser' doesn't contain a valid alias configuration as directory existing directory use ./index.js from main in package.json using description file: c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\package.json (relative path: .) Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\node_modules\child_process.mjs doesn't exist .js Field 'browser' doesn't contain a valid alias configuration using description file: c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\package.json (relative path: ./index.js) no extension Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\node_modules\child_process.js doesn't exist .json Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index.js doesn't exist .wasm Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\node_modules\child_process.json doesn't exist as directory c:\users\sanjit.grover\node_modules\child_process doesn't exist c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index.js.wasm doesn't exist .mjs Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index.js.mjs doesn't exist .js Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index.js.js doesn't exist .json Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index.js.json doesn't exist as directory c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index.js doesn't exist using path: c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index using description file: c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\package.json (relative path: ./index) no extension Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index doesn't exist .wasm Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index.wasm doesn't exist .mjs Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index.mjs doesn't exist .js Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index.js doesn't exist .json Field 'browser' doesn't contain a valid alias configuration c:\users\sanjit.grover\appdata\local\programs\python\python37\share\jupyter\lab\staging\node_modules\child_process\index.json doesn't exist error Command failed with exit code 1. info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command. error Command failed with exit code 1. info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command. error Command failed with exit code 1. info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

JupyterLab failed to build Traceback (most recent call last):

File "c:\users\sanjit.grover\appdata\local\programs\python\python37\lib\site-packages\jupyterlab\debuglog.py", line 47, in debug_logging yield

File "c:\users\sanjit.grover\appdata\local\programs\python\python37\lib\site-packages\jupyterlab\labextensions.py", line 105, in start command=command, app_options=app_options)

File "c:\users\sanjit.grover\appdata\local\programs\python\python37\lib\site-packages\jupyterlab\commands.py", line 460, in build command=command, clean_staging=clean_staging)

File "c:\users\sanjit.grover\appdata\local\programs\python\python37\lib\site-packages\jupyterlab\commands.py", line 661, in build raise RuntimeError(msg)

RuntimeError: JupyterLab failed to build

Exiting application: jupyter

[captainsafia]

@sanjitgrover This package is intended to be used in Node environments. The error you are running into is because you're attempting to use jupyter-paths inside a labextension, which run in the browser.

What are you trying to use the package for?

[aminya]

Yes, please use Nodejs. This code doesn't need Webpack as it is a single file.