mason-lspconfig.nvim VS nvim-cmp

https://github.com/hrsh7th/nvim-cmp This is an autocompletion engine https://github.com/nvim-treesitter/nvim-treesitter This allows NeoVim to install parsing scripts so NeoVim can do things like code highlighting. https://github.com/williamboman/mason.nvim Not strictly necessary, but allows you to access a repo of LSP, install them, and configure them for without you actively messing about in config files. https://github.com/neovim/nvim-lspconfig Also not strictly necessary, but vastly simplifies LSP setup. https://github.com/williamboman/mason-lspconfig.nvim This lets the above two plugins talk to each other more easily.

pylsp offers an option to install flake8 as an optional plugin and Mason offers a command to install pylsp plugins. I could then install flake8-pytest-style via pip. Then pylsp and flake8 would live in the same Mason environment and flake8-pytest-style would live in my project's environment. I don't know if/how they will communicate with each other.

Personally, i think nvim-lint is the best alternative currently, specially so because it has no dependencies on external binaries. This guide assumes you already have your LSP set up with nvim-lspconfig (or an alternative like lsp-zero). You should also have an way to install the linters you are gonna need, i highly recommend Mason with mason-lspconfig.

Have you set up https://github.com/williamboman/mason-lspconfig.nvim as well?

You can also use https://github.com/williamboman/mason-lspconfig.nvim with nvim-lspconfig to make language server installation closer to installing a vscode extension, in that you just install a language server through mason and it'll be automatically configured for you.

https://github.com/williamboman/mason-lspconfig.nvim - Mason plugin to manage your LSP servers.

I found this GitHub issue: https://github.com/williamboman/mason-lspconfig.nvim/issues/224 I think it could be related, but I'm not sure.

LSP: lspconfig & mason-lspconfig.nvim"

vim.api.nvim_set_hl(0, "PmenuSel", { bg = c.background_light, fg = "NONE" }) vim.api.nvim_set_hl(0, "Pmenu", { fg = c.foreground, bg = c.background_light }) vim.api.nvim_set_hl(0, "CmpItemAbbrDeprecated", { fg = c.foreground_light, bg = "NONE", strikethrough = true }) vim.api.nvim_set_hl(0, "CmpItemAbbrMatch", { fg = c.blue , bg = "NONE", bold = true }) vim.api.nvim_set_hl(0, "CmpItemAbbrMatchFuzzy", { fg = c.blue, bg = "NONE", bold = true }) vim.api.nvim_set_hl(0, "CmpItemMenu", { fg = c.purple, bg = "NONE", italic = true }) vim.api.nvim_set_hl(0, "CmpItemKindField", { fg = c.red }) vim.api.nvim_set_hl(0, "CmpItemKindProperty", { fg = c.red }) vim.api.nvim_set_hl(0, "CmpItemKindEvent", { fg = c.red }) vim.api.nvim_set_hl(0, "CmpItemKindText", { fg = c.green }) vim.api.nvim_set_hl(0, "CmpItemKindEnum", { fg = c.green }) vim.api.nvim_set_hl(0, "CmpItemKindKeyword", { fg = c.green }) vim.api.nvim_set_hl(0, "CmpItemKindConstant", { fg = c.yellow }) vim.api.nvim_set_hl(0, "CmpItemKindConstructor", { fg = c.yellow }) vim.api.nvim_set_hl(0, "CmpItemKindReference", { fg = c.yellow }) vim.api.nvim_set_hl(0, "CmpItemKindFunction", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindStruct", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindClass", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindModule", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindOperator", { fg = c.purple }) vim.api.nvim_set_hl(0, "CmpItemKindVariable", { fg = c.foreground }) vim.api.nvim_set_hl(0, "CmpItemKindFile", { fg = c.foreground }) vim.api.nvim_set_hl(0, "CmpItemKindUnit", { fg = c.orange }) vim.api.nvim_set_hl(0, "CmpItemKindSnippet", { fg = c.orange }) vim.api.nvim_set_hl(0, "CmpItemKindFolder", { fg = c.orange }) vim.api.nvim_set_hl(0, "CmpItemKindMethod", { fg = c.blue }) vim.api.nvim_set_hl(0, "CmpItemKindValue", { fg = c.blue }) vim.api.nvim_set_hl(0, "CmpItemKindEnumMember", { fg = c.blue }) vim.api.nvim_set_hl(0, "CmpItemKindInterface", { fg = c.aqua }) vim.api.nvim_set_hl(0, "CmpItemKindColor", { fg = c.aqua }) vim.api.nvim_set_hl(0, "CmpItemKindTypeParameter", { fg = c.aqua }) -- https://github.com/hrsh7th/nvim-cmp/pull/1689 vim.api.nvim_set_hl(0, 'FloatBorder', { fg = c.background_light, bg = c.background_light })

Doing a fast scan on the commit history this is probably related to https://github.com/hrsh7th/nvim-cmp/pull/1689 . Hope it helps.

https://github.com/hrsh7th/nvim-cmp This is an autocompletion engine https://github.com/nvim-treesitter/nvim-treesitter This allows NeoVim to install parsing scripts so NeoVim can do things like code highlighting. https://github.com/williamboman/mason.nvim Not strictly necessary, but allows you to access a repo of LSP, install them, and configure them for without you actively messing about in config files. https://github.com/neovim/nvim-lspconfig Also not strictly necessary, but vastly simplifies LSP setup. https://github.com/williamboman/mason-lspconfig.nvim This lets the above two plugins talk to each other more easily.

Edit: Solved I only had to do this

toggling sources by Treesitter context

But today I'm a different person, and I'm sure that this is the right decision. I already gave a spiel on the cmp PR, but lemme copy-paste my response for those that weren't following the issue or don't check their GitHub notifications:

EDIT: I was able to reproduce the issue with a simplified nvim-cmp init.vim - posted here: https://github.com/hrsh7th/nvim-cmp/issues/1728

You need to add nvim-cmp and cmp-nvim-lsp

one thing that always annoyed me is how the autocomplete window behaves. when the space below your current line isn't sufficient it just teleports above the line. i know you can set a custom menu direction but i'd much rather have it pop up in a consistent place that is below the current line. the other behavior i dislike is the sizing. it's as big as the longest function in the list which can make the window enormous, to the point where there's almost no place left for the docs window. there aren't really any docs in the example below but i imagine with the little space that is left it'll get troublesome for more verbose docs such as with rust. i'd like to somehow tell nvim-cmp to always pop up below the current line, no matter how long the list is and possibly limit the horizontal size. is that at all possible? i've looked through the nvim-cmp wiki but haven't found an adequate solution. does this go beyond nvim-cmp?

Update: This isn't currently supported by nvim-cmp (and in fact it has been a feature request for a bit) and so I did my best and opened a PR that implements it :)