Go (using delve directly) no output

[y1rn]

as subject, i m using nvim-dap-ui,but no every log output in repl panel.

[mfussenegger]

I'll need a more detailed problem description to investigate or help

[y1rn]

should be print something here, right?

[mfussenegger]

Looks like dlv dap currently logs the output to its own stdout instead of routing it via the debug adapter protocol.

recording.mp4

Ideally they'd support the runInTerminal request, so you could have it launch your application in a dedicated terminal. Looks like that's not yet supported: golang/vscode-go#124 - but there is active work in that direction going on: go-delve/delve#2566

There isn't anything that can be done within nvim-dap about it :(

[mfussenegger]

Actually there is something you can do, you could redirect the output of dlv to the repl:

dap.adapters.dlv_spawn = function(cb)
  local stdout = vim.loop.new_pipe(false)
  local handle
  local pid_or_err
  local port = 38697
  local opts = {
    stdio = {nil, stdout},
    args = {"dap", "-l", "127.0.0.1:" .. port},
    detached = true
  }
  handle, pid_or_err = vim.loop.spawn("dlv", opts, function(code)
    stdout:close()
    handle:close()
    if code ~= 0 then
      print('dlv exited with code', code)
    end
  end)
  assert(handle, 'Error running dlv: ' .. tostring(pid_or_err))
  stdout:read_start(function(err, chunk)
    assert(not err, err)
    if chunk then
      vim.schedule(function()
        --- You could adapt this and send `chunk` to somewhere else
        require('dap.repl').append(chunk)
      end)
    end
  end)
  -- Wait for delve to start
  vim.defer_fn(
    function()
      cb({type = "server", host = "127.0.0.1", port = port})
    end,
    100)
end

You'll have to change the type in your configurations to dlv_spawn to use this new adapter definition. For example:

dap.configurations.go = {
  {
    type = 'dlv_spawn',
    name = 'Launch dlv & file',
    request = 'launch',
    program = "${file}";
  },
}

You also have to be aware that the prompt buffer in neovim behaves a bit odd, and output is only visible if you enter it.

[y1rn]

thanks for you response, and it works.