init.lua

-- a minimal example config for setting up neovim with helm-ls and yamlls

-- setup lazy plugin manager
local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
  vim.fn.system({
    "git",
    "clone",
    "--filter=blob:none",
    "https://github.com/folke/lazy.nvim.git",
    "--branch=stable", -- latest stable release
    lazypath,
  })
end
vim.opt.rtp:prepend(lazypath)
vim.g.mapleader = " "

require("lazy").setup({
  -- towolf/vim-helm provides basic syntax highlighting and filetype detection
  -- ft = 'helm' is important to not start yamlls
  { 'towolf/vim-helm',       ft = 'helm' },

  { "neovim/nvim-lspconfig", event = { "BufReadPre", "BufNewFile", "BufEnter" } }
})


local lspconfig = require('lspconfig')

-- setup helm-ls
lspconfig.helm_ls.setup {
  settings = {
    ['helm-ls'] = {
      yamlls = {
        path = "yaml-language-server",
      }
    }
  }
}

-- setup yamlls
lspconfig.yamlls.setup {}


-- below are keymapping as recommended by nvim-lspconfig

-- Global mappings.
-- See `:help vim.diagnostic.*` for documentation on any of the below functions
vim.keymap.set('n', '<space>e', vim.diagnostic.open_float)
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev)
vim.keymap.set('n', ']d', vim.diagnostic.goto_next)
vim.keymap.set('n', '<space>q', vim.diagnostic.setloclist)

-- Use LspAttach autocommand to only map the following keys
-- after the language server attaches to the current buffer
vim.api.nvim_create_autocmd('LspAttach', {
  group = vim.api.nvim_create_augroup('UserLspConfig', {}),
  callback = function(ev)
    -- Enable completion triggered by <c-x><c-o>
    vim.bo[ev.buf].omnifunc = 'v:lua.vim.lsp.omnifunc'

    -- Buffer local mappings.
    -- See `:help vim.lsp.*` for documentation on any of the below functions
    local opts = { buffer = ev.buf }
    vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, opts)
    vim.keymap.set('n', 'gd', vim.lsp.buf.definition, opts)
    vim.keymap.set('n', 'K', vim.lsp.buf.hover, opts)
    vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, opts)
    vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, opts)
    vim.keymap.set('n', '<space>wa', vim.lsp.buf.add_workspace_folder, opts)
    vim.keymap.set('n', '<space>wr', vim.lsp.buf.remove_workspace_folder, opts)
    vim.keymap.set('n', '<space>wl', function()
      print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
    end, opts)
    vim.keymap.set('n', '<space>D', vim.lsp.buf.type_definition, opts)
    vim.keymap.set('n', '<space>rn', vim.lsp.buf.rename, opts)
    vim.keymap.set({ 'n', 'v' }, '<space>ca', vim.lsp.buf.code_action, opts)
    vim.keymap.set('n', 'gr', vim.lsp.buf.references, opts)
    vim.keymap.set('n', '<space>f', function()
      vim.lsp.buf.format { async = true }
    end, opts)
  end,
})