nvim/lua/init-plugins.lua

require'nvim-treesitter.configs'.setup {
  ensure_installed = "maintained", -- one of "all", "maintained" (parsers with maintainers), or a list of languages
  ignore_install = { "c" }, -- List of parsers to ignore installing
  highlight = {
    enable = true,              -- false will disable the whole extension
    disable = { "c", "rust" },  -- list of language that will be disabled
    -- Setting this to true will run `:h syntax` and tree-sitter at the same time.
    -- Set this to `true` if you depend on 'syntax' being enabled (like for indentation).
    -- Using this option may slow down your editor, and you may see some duplicate highlights.
    -- Instead of true it can also be a list of languages
    additional_vim_regex_highlighting = false,
  },
}
-- https://github.com/neovim/nvim-lspconfig
-- https://github.com/neovim/nvim-lspconfig/blob/master/CONFIG.md
-- npm install -g  typescript typescript-language-server
require'lspconfig'.tsserver.setup{}
-- npm install -g vim-language-server
require'lspconfig'.vimls.setup{}
-- npm install -g pyright
require'lspconfig'.pyright.setup{}
-- phpactor installation -
--   https://phpactor.readthedocs.io/en/master/usage/standalone.html
require'lspconfig'.phpactor.setup{}
-- npm i -g vscode-langservers-extracted
require'lspconfig'.cssls.setup{}
-- npm install -g vls
require'lspconfig'.vuels.setup{}
-- npm i -g bash-language-server
-- TODO - don't run for sh files but have something else instead - shellcheck?
require'lspconfig'.bashls.setup{}
-- npm install -g yaml-language-server
require'lspconfig'.yamlls.setup{}
-- npm i -g stylelint-lsp
require'lspconfig'.stylelint_lsp.setup{}
-- https://github.com/neovim/nvim-lspconfig/wiki
require'lspconfig'.tailwindcss.setup{}

--[efm-langserver]

-- "   npm install -g eslint_d
local eslint = {
  lintCommand = "eslint_d -f unix --stdin --stdin-filename ${INPUT}",
  lintStdin = true,
  lintFormats = {"%f:%l:%c: %m"},
  lintIgnoreExitCode = true,
  formatCommand = "eslint_d --fix-to-stdout --stdin --stdin-filename=${INPUT}",
  formatStdin = true
}
local shellcheck = {
    lintCommand = "shellcheck -f gcc -x",
    lintSource = "shellcheck",
	lintFormats = {
      "%f:%l:%c: %trror: %m",
      "%f:%l:%c: %tarning: %m",
      "%f:%l:%c: %tote: %m",
	}
}
local flake8 = {
	lintCommand = "flake8 --stdin-display-name ${INPUT} -",
    lintStdin = true,
	lintFormats = {"%f:%l:%c: %m"}
}
local black = {
	formatCommand = "black --quiet -",
    formatStdin = true
}
-- sudo pacman -Syu jq
local jq = {
	lintCommand = "jq ."
}
-- npm install -g fixjson
local fixjson = {
	formatCommand = "fixjson"
}
-- https://aur.archlinux.org/packages/lua-format/
local luaformat = {
	formatCommand = 'lua-formatt -i',
	formatStdin = true
}
local util = require "lspconfig".util
local on_attach_efm = function(client)
  if client.resolved_capabilities.document_formatting then
    vim.cmd [[augroup lsp_formatting]]
    vim.cmd [[autocmd!]]
	vim.cmd [[autocmd BufWritePre <buffer> :lua vim.lsp.buf.formatting_seq_sync({}, 1000)]]
    vim.cmd [[augroup END]]
  end
end
require "lspconfig".efm.setup {
  init_options = {documentFormatting = true},
  on_attach = on_attach_efm,
  filetypes = {"javascript", "typescript", "json", "sh", "python", "lua"},
  root_dir = function(fname)
    return util.root_pattern("tsconfig.json")(fname) or
    util.root_pattern(".eslintrc.js", ".git")(fname);
  end,
  settings = {
    rootMarkers = {".eslintrc.js", ".git/"},
    languages = {
      javascript = {eslint},
      typescript = {eslint},
	  json = {jq, fixjson},
	  python = {flake8, black},
	  sh = {shellcheck},
	  lua = {luaformat}
    }
  }
}

local nvim_lsp = require('lspconfig')

-- Use an on_attach function to only map the following keys
-- after the language server attaches to the current buffer
local on_attach = function(client, bufnr)
  local function buf_set_keymap(...) vim.api.nvim_buf_set_keymap(bufnr, ...) end
  local function buf_set_option(...) vim.api.nvim_buf_set_option(bufnr, ...) end

  -- Enable completion triggered by <c-x><c-o>
  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')

  -- Mappings.
  local opts = { noremap=true, silent=true }

  -- See `:help vim.lsp.*` for documentation on any of the below functions
  buf_set_keymap('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<CR>', opts)
  buf_set_keymap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
  buf_set_keymap('n', 'K', '<cmd>lua vim.lsp.buf.hover()<CR>', opts)
  buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
  buf_set_keymap('n', '<C-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
  -- buf_set_keymap('n', '<space>wa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
  -- buf_set_keymap('n', '<space>wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
  -- buf_set_keymap('n', '<space>wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
  buf_set_keymap('n', '<space>D', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
  buf_set_keymap('n', '<space>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
  buf_set_keymap('n', '<space>ca', '<cmd>lua vim.lsp.buf.code_action()<CR>', opts)
  buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
  buf_set_keymap('n', '<space>e', '<cmd>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>', opts)
  buf_set_keymap('n', '[d', '<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>', opts)
  buf_set_keymap('n', ']d', '<cmd>lua vim.lsp.diagnostic.goto_next()<CR>', opts)
  buf_set_keymap('n', '<space>q', '<cmd>lua vim.lsp.diagnostic.set_loclist()<CR>', opts)
  buf_set_keymap('n', '<space>f', '<cmd>lua vim.lsp.buf.formatting()<CR>', opts)

end

-- Use a loop to conveniently call 'setup' on multiple servers and
-- map buffer local keybindings when the language server attaches
local servers = {
	'bashls',
	'cssls',
	'phpactor',
	'pyright',
	'stylelint_lsp',
	'tailwindcss',
	'tsserver',
	'vimls',
	'vuels'
}
for _, lsp in ipairs(servers) do
  nvim_lsp[lsp].setup {
    on_attach = on_attach,
    flags = {
      debounce_text_changes = 150,
    }
  }
end

local cmp = require'cmp'
cmp.setup({
	completion = {
		keyword_length = 4
		-- autocomplete = false
	},
	-- snippet = {
	--   expand = function(args)
	--     vim.fn["vsnip#anonymous"](args.body)
	--   end,
	-- },
	mapping = {
		['<C-n>'] = cmp.mapping.complete(),
		['<C-y>'] = cmp.mapping.confirm({ select = true }),
		['<C-e>'] = cmp.mapping.abort(),
	},
	sources = {
		{ name = 'buffer' },
		{ name = 'nvim_lsp' },
		{ name = 'path' },
		--{ name = 'ultisnips' },
		...
	}
})