nvim-dap how to configure target executable?

[jrunestone]

Field	Description
Plugin	nvim-dap
Nixpkgs	unstable
Home Manager	`unstable

• I have read the FAQ and my bug is not listed there.

Description

Pretty sure this isn't a bug, but how do I do anything other than hard-coding the path to the target debug executable in the dap configuration section? The examples over at the nvim-dap repo uses a lua function. Can I not pass it like this? I'm not getting any errors but the program doesn't launch. Hard-coding a file path does work.

programs.nixvim.plugins.dap.configurations.c = [{
  name = "Debug";
  type = "gdb";
  request = "launch";
  program = ''
    function()
      return vim.fn.input('Path to executable: ', vim.fn.getcwd() .. '/', 'file')
    end
  '';
}];

Thank you.

[Bodleum]

Looking at the docs, this doesn't seem to be an option.
We could change plugins.dap.configurations.* to be attrs of anything and allow the user to configure it according to the plugin docs, similar to how cmp.settings works.

[jrunestone]

OK sounds like a good idea. I thought program already worked like that since it's not explicitly specified in the nixvim config (but type, request, name are). Hard-coding the path doesn't really lend itself to a generic configuration :)

[jdbosser]

@jrunestone did you find any workaround?

[jrunestone]

No sorry I disabled the plugin. Never really got used to language and debugging support in neovim, I recently switched to zed-editor instead.

[jdbosser]

I worked a bit on it, and I got this to work for my rust debugger:

Here is my debugging.nix module for nixvim. It contains a lot of uneccessary parts for this discussion, but I believe that if
someone from the future stumble into this issue, a complete module will probably be appreciated.

{config, helpers, pkgs, ...}:
{
	plugins = {
		dap = {
			enable = true; 
			extensions.dap-ui.enable = true; 
			adapters.servers.codelldb = rec {
				port = "\${port}";
				executable = {
					command = "${pkgs.vscode-extensions.vadimcn.vscode-lldb}/share/vscode/extensions/vadimcn.vscode-lldb/adapter/codelldb";
					args = ["--port" "${port}"];
				}; 
			}; 
			configurations.rust = [{
				type = "codelldb"; 
				name = "Rust Debug"; 
				request = "launch";
				program = helpers.mkRaw "
function()
	vim.fn.jobstart('cargo build') 
	return vim.fn.input('Path to executable: ', vim.fn.getcwd() .. '/', 'file')
end
			"; 
			}

			];

		};
	};

}

[khaneliman]

The nvim-dap module has yet to be refactored to latest standards, and should get some documentation love when it does.. I also have a fairly robust nvim-dap configuration that I use for debugging multiple different projects for work and side projects https://github.com/khaneliman/khanelivim/blob/fbc004758de53f6b4a67e37e51fa8701b2cc9ccb/packages/khanelivim/plugins/dap.nix if someone needs some more examples of how to configure it.