How to use this?

[gvanrossum]

Excuse me if I'm dumb, but I'm new to both vscode and pyls, and I don't know anything about node.js either. How does one typically configure vscode to use pyls? By default it comes with a different Python package. I looked at README.rst and found instructions for developing pyls against vscode (which is my ultimate plan :-) but those instructions seem broken too:

$ yarn install .
yarn install v1.7.0
error `install` has been replaced with `add` to add new dependencies. Run "yarn add ." instead.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
$ yarn add .
yarn add v1.7.0
(node:23850) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
[1/5] 🔍  Validating package.json...
warning vscode-client@0.0.1: The engine "vscode" appears to be invalid.
[2/5] 🔍  Resolving packages...
error Received malformed response from registry for undefined. The registry may be down.
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.

What am I missing? (My ultimate goal is to write a plugin that adds access to mypy's internals to allow definition lookup and other functionality for Python -- the mypy-daemon has already collected the data, it's just a matter of getting it out. See https://mypy.readthedocs.io/en/latest/mypy_daemon.html for the current state of this project.)

[gvanrossum]

Follow-up: I got the yarn thing to work with yarn add file:. but I'm still no closer to running pyls against the default vscode binary (i.e. not following the development recipe).

[mnazbro]

Hi, I believe the instructions were slightly misleading. The command yarn install (not yarn install .) will resolve dependencies and download them for you. You'll want to run that instead of yarn install .. yarn add . instead will add a new dependency called ..

[gvanrossum]

OK, thanks -- yarn install without . works. So before you close this as "fixed", I still have that other question: given a non-dev version of VS Code (and with pyls installed) how does one use pyls from VS Code? My default VS Code instance still uses the default Python extension.

[gatesn]

From within VSCode you can install the shell commands that enable you to run it from the command line: https://code.visualstudio.com/docs/setup/mac#_launching-from-the-command-line

After this, the yarn run vscode command will open VSCode in extension development mode. Within this mode, pyls will run when you open a Python file. There will also be an output panel with the pyls logs. Pressing Ctrl/Cmd+R will refresh the window and restart pyls.

At the bottom of vscode-client/src/extension.ts you will find where pyls is configured to run. You can change this file to add -vvv flags, or to use an absolute path to pyls.

Some more general docs are available here: https://code.visualstudio.com/docs/extensions/developing-extensions

[gvanrossum]

OK, so that's for extension developers. What do regular VS Code users do? Is there a place they can select pyls from the extensions marketplace? I don't see it here: https://marketplace.visualstudio.com/search?term=python&target=VSCode&category=All%20categories&sortBy=Relevance

[gatesn]

Oh I see. No, we have an open ticket to publish a VSCode extension to the market place: #194

It's not quite clear to me what the proper way to do this is. I presume we don't package a Python runtime. Can probably follow Microsoft's example: https://github.com/Microsoft/vscode-python

[DrPyser]

@gatesn Sorry if it's not appropriate to comment on a closed issue, but I'm still confused as to how to use pyls with vscode(though that may be vscode's fault). Do I have to install a plugin specifically developed for pyls which does not currently exist? My understanding of LSP was that the goal was to avoid this?

Is there not a way to tell vscode to use pyls as the python language server?

[dalisoft]

Would be nice to use as Extension on VS(Code/Codium)