keycodex/lua/plugins/lspconfig.lua

return {
    'neovim/nvim-lspconfig',
    event = { 'BufReadPost', 'FileType' },
    dependencies = {
        'hrsh7th/cmp-nvim-lsp',
        { 'antosha417/nvim-lsp-file-operations', config = true },
    },
    config = function()
        -- import lspconfig plugin
        local lspconfig = require('lspconfig')
        -- import cmp-nvim-lsp plugin
        local cmp_nvim_lsp = require('cmp_nvim_lsp')

        local keymap = vim.keymap -- for conciseness

        vim.api.nvim_create_autocmd('LspAttach', {
            group = vim.api.nvim_create_augroup('UserLspConfig', {}),
            callback = function(ev)
                -- Buffer local mappings.
                -- See `:help vim.lsp.*` for documentation on any of the below functions
                local opts = { buffer = ev.buf, silent = true }

                -- set keybinds
                opts.desc = 'Show LSP references'
                keymap.set('n', 'gR', '<cmd>Telescope lsp_references<CR>', opts) -- show definition, references

                opts.desc = 'Go to declaration'
                keymap.set('n', 'gD', vim.lsp.buf.declaration, opts) -- go to declaration

                opts.desc = 'Show LSP definitions'
                keymap.set('n', 'gd', '<cmd>Telescope lsp_definitions<CR>', opts) -- show lsp definitions

                opts.desc = 'Show LSP implementations'
                keymap.set('n', 'gi', '<cmd>Telescope lsp_implementations<CR>', opts) -- show lsp implementations

                opts.desc = 'Show LSP type definitions'
                keymap.set('n', 'gt', '<cmd>Telescope lsp_type_definitions<CR>', opts) -- show lsp type definitions

                opts.desc = 'See available code actions'
                keymap.set({ 'n', 'v' }, '<leader>ca', vim.lsp.buf.code_action, opts) -- see available code actions, in visual mode will apply to selection

                opts.desc = 'Smart rename'
                keymap.set('n', '<leader>rn', vim.lsp.buf.rename, opts) -- smart rename

                opts.desc = 'Show buffer diagnostics'
                keymap.set('n', '<leader>D', '<cmd>Telescope diagnostics bufnr=0<CR>', opts) -- show  diagnostics for file

                opts.desc = 'Show line diagnostics'
                keymap.set('n', '<leader>d', vim.diagnostic.open_float, opts) -- show diagnostics for line

                opts.desc = 'Show documentation for what is under cursor'
                keymap.set('n', 'K', vim.lsp.buf.hover, opts) -- show documentation for what is under cursor

                opts.desc = 'Restart LSP'
                keymap.set('n', '<leader>rs', ':LspRestart<CR>', opts) -- mapping to restart lsp if necessary
            end,
        })

        -- used to enable autocompletion (assign to every lsp server config)
        local capabilities = cmp_nvim_lsp.default_capabilities()

        -- configure matlab server
        lspconfig['clangd'].setup({
            capabilities = capabilities,
            on_attach = on_attach,
        })
        -- configure bash server
        lspconfig['bashls'].setup({
            capabilities = capabilities,
            on_attach = on_attach,
        })
        -- configure html server
        lspconfig['html'].setup({
            capabilities = capabilities,
            on_attach = on_attach,
        })
        -- configure typescript server with plugin
        lspconfig['tsserver'].setup({
            capabilities = capabilities,
            on_attach = on_attach,
        })

        -- configure css server
        lspconfig['cssls'].setup({
            capabilities = capabilities,
            on_attach = on_attach,
        })

        -- configure tailwindcss server
        lspconfig['tailwindcss'].setup({
            capabilities = capabilities,
            on_attach = on_attach,
        })

        -- configure svelte server
        lspconfig['svelte'].setup({
            capabilities = capabilities,
            on_attach = function(client, bufnr)
                on_attach(client, bufnr)

                vim.api.nvim_create_autocmd('BufWritePost', {
                    pattern = { '*.js', '*.ts' },
                    callback = function(ctx)
                        if client.name == 'svelte' then
                            client.notify('$/onDidChangeTsOrJsFile', { uri = ctx.file })
                        end
                    end,
                })
            end,
        })
        -- configure python server
        lspconfig['pyright'].setup({
            capabilities = capabilities,
            on_attach = on_attach,
        })

        -- configure lua server (with special settings)
        lspconfig['lua_ls'].setup({
            capabilities = capabilities,
            on_attach = on_attach,
            settings = { -- custom settings for lua
                Lua = {
                    -- make the language server recognize "vim" global
                    diagnostics = {
                        globals = { 'vim' },
                    },
                    workspace = {
                        -- make language server aware of runtime files
                        library = {
                            [vim.fn.expand('$VIMRUNTIME/lua')] = true,
                            [vim.fn.stdpath('config') .. '/lua'] = true,
                        },
                    },
                },
            },
        })

        local x = vim.diagnostic.severity
        local config = {
            -- Enable virtual text
            virtual_text = { -- or false for disable
                prefix = '', -- ■  󰊠
                suffix = '',
                format = function(diagnostic)
                    local prefix = '󰊠 '
                    local suffix = ' '
                    -- return full message with custom prefix & suffix
                    return prefix .. diagnostic.message .. suffix
                end,
            },
            update_in_insert = true,
            signs = { text = { [x.ERROR] = '', [x.WARN] = '', [x.HINT] = '󰌵', [x.INFO] = '' } },
            underline = false,
            severity_sort = true,
            float = {
                focusable = false,
                style = 'minimal',
                border = 'rounded',
                source = 'always',
                header = '',
                prefix = '',
            },
        }

        vim.diagnostic.config(config)
        -- add borders to lsp info window
        require('lspconfig.ui.windows').default_options.border = 'single'
    end,
}