Vagrant debugging

[TornaxO7]

I have vagrant running and I'd like to debug the scripts on it but I don't want to put my nvim-setup on the vagrant machine. IntelliJ can let you debug on a vagrant machine is that possible with nvim-dap as well?

[mfussenegger]

Any debug adapter that supports running via TCP could work. E.g. debugpy could be spawned with the --listen option inside the VM and then nvim-dap could be configured to connect to it.

If/how well that works depends on the concrete debug adapter.

Providing more built-in or first class support for more "easy-of-use" Docker/Vagrant/SSH debug scenarios is out-of-scope of nvim-dap itself, but the building blocks make it possible and an extension could improve upon it.

[TornaxO7]

Hi! It's me again! I've got a little problem. So I did the following on my vagrant machine:

python3 -m debugpy --listen 5678 --wait-for-client /path/to/script.py

Now on my local machine I did

nvim /path/to/script.py

and executed :lua require('dap').continue() with a breakpoint. So far so good, the problem is, that I'm getting the following error message:

Error executing luv callback:
/Users/tornax/.vim/plugged/nvim-dap/lua/dap.lua:658: "ECONNREFUSED"

Settings

I'm using nvim-dap in combination with nvim-dap-install and nvim-dap-ui. So here are my configs which are getting sourced:

~/.config/nvim/plugins/dap.vim

augroup NvimDap
    autocmd!
    au FileType dap-repl lua require('dap.ext.autocompl').attach()
augroup END

let g:my_dap_repl_is_open = v:false

function OpenRepl()
    echo "called"
    " open repl if it isn't opened yet
    if !g:my_dap_repl_is_open
        lua require('dap').repl.open()
        let g:my_dap_repl_is_open = v:true
    endif

    lua require('dap').continue()
endfunction

nnoremap <F5> :call OpenRepl()<CR>
nnoremap <F6> :lua require('dap').step_over()<CR>
nnoremap <F7> :lua require('dap').step_into()<CR>
nnoremap <F8> :lua require('dap').step_out()<CR>
nnoremap <F9><F9> :lua require('dap').toggle_breakpoint()<CR>
nnoremap <F9><F10> :lua require('dap').set_breakpoint(vim.fn.input('Breakpoint condition: '))<CR>
nnoremap <F9><F7> :lua require('dap').set_breakpoint(nil, nil, vim.fn.input('Log point message: '))<CR>
"nnoremap <silent> <leader>dl :lua require'dap'.run_last()<CR>

lua require("dap_conf")

~/.config/nvim/lua/dap_conf.lua

local dap = require('dap')
local dap_ui = require('dapui')
dap.set_log_level('TRACE')
dap_ui.setup(
{
        icons = {
            expanded = "⯆",
            collapsed = "⯈",
            circular = "↺"
        },
        mappings = {
            expand = "<CR>",
            open = "o",
            remove = "d"
        },
        sidebar = {
            elements = {
                -- You can change the order of elements in the sidebar
                "scopes",
                "stacks",
                "watches"
            },
            width = 40,
            position = "left" -- Can be "left" or "right"
        },
        tray = {
            elements = {
                "repl"
            },
            height = 10,
            position = "bottom" -- Can be "bottom" or "top"
        },
        floating = {
            max_height = nil, -- These can be integers or a float between 0 and 1.
            max_width = nil   -- Floats will be treated as percentage of your screen.
        }
})

vim.g.dap_virtual_text = true

~/.config/nvim/lua/dapinstall.lua

local dap_install = require("dap-install")

dap_install.setup({
    installation_path = vim.api.nvim_eval('$HOME') .. "/Apps/nvim-dap/",
    verbosely_call_debuggers = true,
})

dap_install.config("python_dbg", {
    adapters = {
        type = "server",
        port = 5678,
        host = "127.0.0.1"
    },
    configurations = {
        {
            name = "Attach",
            type = "python",
            request = "attach",
            connect = {
                port = 5678,
                host = "127.0.0.1",
            }
        }
    }
})

dap_install.config("php_dbg", {})

dap_install.config("jsnode_dbg", {})

Do you have an idea what I'm doing wrong?

[TornaxO7]

Hint: The vagrant machine runs on my machine.

Also: My settings there work, if I try to debug a local file:

python3 -m debugpy --listen 5678 --wait-for-client /tmp/test.py

and then calling :lua require('dap').continue() opens nvim-dap-ui as expected.

[mfussenegger]

Are you forwarding the ports from the VM? See https://www.vagrantup.com/docs/networking/forwarded_ports

[TornaxO7]

Good point! I'll look if this might be the reason why it isn't working.

[TornaxO7]

So the port is forwarded, but I still can't debug ._.