dotfiles/nvim/plugin/lsp.lua

local on_attach = function(_, bufnr)
    local nmap = function(keys, func, desc)
        if desc then
            desc = 'LSP: ' .. desc
        end

        vim.keymap.set('n', keys, func, { buffer = bufnr, desc = desc })
    end

    nmap('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')
    nmap('<leader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction')

    nmap('gd', require('telescope.builtin').lsp_definitions, '[G]oto [D]efinition')
    nmap('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')
    nmap('gI', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')
    nmap('<leader>D', require('telescope.builtin').lsp_type_definitions, 'Type [D]efinition')
    nmap('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')
    nmap('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')

    -- See `:help K` for why this keymap
    nmap('K', vim.lsp.buf.hover, 'Hover Documentation')
    nmap('<C-k>', vim.lsp.buf.signature_help, 'Signature Documentation')

    -- Lesser used LSP functionality
    nmap('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
    nmap('<leader>wa', vim.lsp.buf.add_workspace_folder, '[W]orkspace [A]dd Folder')
    nmap('<leader>wr', vim.lsp.buf.remove_workspace_folder, '[W]orkspace [R]emove Folder')
    nmap('<leader>wl', function()
        print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
    end, '[W]orkspace [L]ist Folders')

    -- Create a command `:Format` local to the LSP buffer
    vim.api.nvim_buf_create_user_command(bufnr, 'Format', function(_)
        if vim.lsp.buf.format then
            vim.lsp.buf.format()
        elseif vim.lsp.buf.formatting then
            vim.lsp.buf.formatting()
        end
    end, { desc = 'Format current buffer with LSP' })
end

-- LSP Diagnostics Options Setup
local sign = function(opts)
    vim.fn.sign_define(opts.name, {
        texthl = opts.name,
        text = opts.text,
        numhl = ''
    })
end

sign({ name = 'DiagnosticSignError', text = '' })
sign({ name = 'DiagnosticSignWarn', text = '' })
sign({ name = 'DiagnosticSignHint', text = '' })
sign({ name = 'DiagnosticSignInfo', text = '' })

vim.diagnostic.config({
    virtual_text = false,
    signs = true,
    update_in_insert = true,
    underline = true,
    severity_sort = false,
    float = {
        border = 'rounded',
        source = 'always',
        header = '',
        prefix = '',
    },
})

vim.cmd([[
autocmd CursorHold * lua vim.diagnostic.open_float(nil, { focusable = false })
]])

-- LSP Configuration

local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)

require('neodev').setup({
    override = function(root_dir, library)
        if root_dir:find("/home/kalle/.dots", 1, true) == 1 then
            library.enabled = true
            library.plugins = true
        end
    end,
})

require('lspconfig').lua_ls.setup {
    on_attach = on_attach,
    capabilities = capabilities,
    root_dir = function()
        return vim.loop.cwd()
    end,
    cmd = { "lua-language-server" },
    settings = {
        Lua = {
            workspace = { checkThirdParty = false },
            telemetry = { enable = false },
        },
    }
}

require('lspconfig').nixd.setup {
    on_attach = on_attach,
    capabilities = capabilities,
}

require('lspconfig').tsserver.setup {
    on_attach = on_attach,
    capabilities = capabilities,
    init_options = {
        tsserver = {
            fallbackPath = string.gsub(vim.fn.system("dirname `which tsserver`"), '^%s*(.-)%s*$', '%1') .. "/../lib/node_modules/typescript/lib",
        },
    },
}

require('lspconfig').tailwindcss.setup {
    on_attach = on_attach,
    capabilities = capabilities,
}

require('lspconfig').clangd.setup {
    on_attach = on_attach,
    capabilities = capabilities,
}

require('lspconfig').gopls.setup {
    on_attach = on_attach,
    capabilities = capabilities,
}

require('lspconfig').vhdl_ls.setup {
    on_attach = on_attach,
    capabilities = capabilities,
}

require('rust-tools').setup({
    server = {
        on_attach = on_attach,
        settings = {
            ["rust-analyzer"] = {
                checkOnSave = {
                    command = "clippy"
                },
            },
        }
    },
})