Add neovim-dap and configure it for go

Should probably put it in a separate file, TODO

users/profiles/neovim/default.nix

@@ -31,6 +31,91 @@
         plugin = iceberg-vim;
         config = "colorscheme iceberg";
       }
+      {
+        plugin = nvim-dap;
+        config = ''
+                lua <<EOF
+                local dap = require'dap'
+                  dap.adapters.go = function(callback, config)
+                    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()
+                          require('dap.repl').append(chunk)
+                        end)
+                      end
+                    end)
+                    -- Wait for delve to start
+                    vim.defer_fn(
+                      function()
+                        callback({type = "server", host = "127.0.0.1", port = port})
+                      end,
+                      100)
+                  end
+                  -- https://github.com/go-delve/delve/blob/master/Documentation/usage/dlv_dap.md
+                  dap.configurations.go = {
+                    -- works with go.mod packages and sub packages 
+                    {
+                      type = "go",
+                      name = "Debug (go.mod)",
+                      request = "launch",
+                      program = "''${workspaceFolder}"
+                    }, 
+                    {
+                      type = "go",
+                      name = "Debug test (go.mod)",
+                      request = "launch",
+                      mode = "test",
+                      program = "''${workspaceFolder}"
+                    },
+                    {
+                      type = "go",
+                      name = "Debug",
+                      request = "launch",
+                      program = "''${file}"
+                    },
+                    {
+                      type = "go",
+                      name = "Debug test", -- configuration for debugging test files
+                      request = "launch",
+                      mode = "test",
+                      program = "''${file}"
+                    },
+                }
+                EOF
+                nnoremap <silent> <F5> :lua require'dap'.continue()<CR>
+                nnoremap <silent> <F10> :lua require'dap'.step_over()<CR>
+                nnoremap <silent> <F11> :lua require'dap'.step_into()<CR>
+                nnoremap <silent> <F12> :lua require'dap'.step_out()<CR>
+                nnoremap <silent> <leader>b :lua require'dap'.toggle_breakpoint()<CR>
+                nnoremap <silent> <leader>B :lua require'dap'.set_breakpoint(vim.fn.input('Breakpoint condition: '))<CR>
+                nnoremap <silent> <leader>lp :lua require'dap'.set_breakpoint(nil, nil, vim.fn.input('Log point message: '))<CR>
+                nnoremap <silent> <leader>dr :lua require'dap'.repl.open()<CR>
+                nnoremap <silent> <leader>dl :lua require'dap'.run_last()<CR>
+        '';
+      }
+      {
+        plugin = nvim-dap-ui;
+        config = "lua require('dapui').setup()";
+      }
+
       vim-sleuth
       vim-nix
       pkgs.go-fold-if-err-nil