A Note on X where X = "LSP + flycheck + lsp-pyright"

By Anak Wannaphaschaiyong

History of edit

  • Last edit is <2022-11-28 Mon>.

There are 3 components to pay attention to including: conda.el, lsp-pyright, and flycheck.

First, conda.el allows user to activate conda env from within Emacs. Users can check conda.el by checking conda-env-home-directory, conda-env-current-name, and conda-env-current-path.

Second, LSP is language server a general concept outside of Emacs and python. LSP may have type checking as its feature. lsp-pyright is python language server (called “pyright”). It is implemented in Elisp. It is lsp that have type checking feature.

Third, Flycheck is an emacs package whose goal is to perform on-the-fly syntax checking. The package is meant to be used for multiple languages.

Given what we know above, the main task for configuration is to

  1. have lsp-pyright to correctly set conda env path to lsp-pyright set lsp-pyright-python-executable-cmd to python3 (note that env of python3 is determined by conda-env-current-path)
  2. have flycheck use lsp-pyright as lsp for python.

That’s it.

Peace.

~milfex-lostex