gistfile1.txt

lua << EOF
    local nvim_lsp = require'nvim_lsp'
    local log = require'vim.lsp.log'

    nvim_lsp.rust_analyzer.setup{}
    nvim_lsp.gopls.setup{}

    function lsp_go_to_definition(cmd)
        local params = vim.lsp.util.make_position_params()
        return vim.lsp.buf_request(0, 'textDocument/definition', params, function(_, method, result)
            if result == nil or vim.tbl_isempty(result) then
                local _ = log.info() and log.info(method, 'No definitions found')
                return nil
            end

            local loc = vim.tbl_islist(result) and result[1] or result
            local _ = cmd and vim.cmd(cmd)
            vim.lsp.util.jump_to_location(loc)
        end)
    end
EOF

nnoremap <silent> <leader>d    <cmd>lua lsp_go_to_definition()<CR>
nnoremap <silent> <leader>ds   <cmd>lua lsp_go_to_definition('split')<CR>
nnoremap <silent> <leader>dv   <cmd>lua lsp_go_to_definition('vsplit')<CR>
nnoremap <silent> <leader>dt   <cmd>lua lsp_go_to_definition('tabe')<CR>