@@ -21,6 +21,7 @@ require 'lsp.rust'
 
 -- plugins not in nixpkgs
 require 'packer'.startup(function(use)
-  use 'kana/vim-textobj-user'
   use 'preservim/vim-textobj-quote'
 end)
+
+require 'dapx'

@@ -61,14 +61,14 @@ { name = 'luasnip' }
   }
 })
 
-cmp.setup.cmdline(':', {
-  mapping = cmp.mapping.preset.cmdline(),
-  sources = cmp.config.sources({
-    { name = 'path' }
-  }, {
-    { name = 'cmdline' }
-  })
-})
+-- cmp.setup.cmdline(':', {
+--   mapping = cmp.mapping.preset.cmdline(),
+--   sources = cmp.config.sources({
+--     { name = 'path' }
+--   }, {
+--     { name = 'cmdline' }
+--   })
+-- })
 
 local capabilities = require('cmp_nvim_lsp').default_capabilities()
 require('lspconfig')['gopls'].setup {

@@ -0,0 +1,91 @@
+local dap = require 'dap'
+
+dap.set_log_level('INFO')
+
+dap.configurations.go = {
+  {
+    type = "go",
+    name = "Debug",
+    request = "launch",
+    program = "${file}",
+  },
+}
+
+dap.adapters.go = {
+  type = "server",
+  port = "${port}",
+  executable = {
+    command = 'dlv',
+    args = { "dap", "-l", "127.0.0.1:${port}" },
+  },
+}
+
+require 'dap-go'.setup {
+  dap_configurations = {
+    {
+      type = "go",
+      name = "Debug (main.go)",
+      request = "launch",
+      program = "${workspaceFolderBasename}/cmd/main.go",
+    },
+  },
+}
+
+require 'dapui'.setup({
+  controls = {
+    element = "repl",
+    enabled = true,
+    icons = {
+      disconnect = "■",
+      pause = "",
+      play = "▶",
+      run_last = "≪",
+      step_back = "←",
+      step_into = "↓",
+      step_out = "↑",
+      step_over = "→",
+      terminate = "✗"
+    }
+  },
+  icons = { expanded = "▾", collapsed = "▸" },
+  mappings = {
+    open = "o",
+    remove = "d",
+    edit = "e",
+    repl = "r",
+    toggle = "t",
+  },
+  layouts = {
+    {
+      elements = {
+        "scopes",
+      },
+      size = 0.2,
+      position = "left"
+    },
+    {
+      elements = {
+        "repl",
+        "breakpoints"
+      },
+      size = 0.3,
+      position = "bottom",
+    },
+  },
+  floating = {
+    max_height = nil,
+    max_width = nil,
+    border = "single",
+    mappings = {
+      close = { "q", "<Esc>" },
+    },
+  },
+  windows = { indent = 1 },
+  render = {
+    max_type_length = nil,
+  },
+})
+
+vim.fn.sign_define('DapBreakpoint', {text = '•'})
+
+require 'dapui.config.highlights'.setup()

@@ -1,5 +1,6 @@
 local cmd = vim.cmd
 local map = vim.keymap.set
+local dap = require 'dap'
 local u = require 'utils'
 local M = {}
 
@@ -78,22 +79,18 @@
 -- lspconfig
 function M.on_attach(client, bufnr)
   local function buf_set_keymap(...) vim.api.nvim_buf_set_keymap(bufnr, ...) end
-  local function buf_set_option(...) vim.api.nvim_buf_set_option(bufnr, ...) end
-
   buf_set_keymap('n', 'gD', '<Cmd>lua vim.lsp.buf.declaration()<CR>', options)
   buf_set_keymap('n', 'gd', '<Cmd>lua vim.lsp.buf.definition()<CR>', options)
   buf_set_keymap('n', 'ga', '<Cmd>lua vim.lsp.buf.code_action()<CR>', options)
   buf_set_keymap('n', 'K', '<Cmd>lua vim.lsp.buf.hover()<CR>', options)
+  buf_set_keymap('n', 'L', '<Cmd>lua vim.lsp.buf.signature_help()<CR>', options)
   buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', options)
   buf_set_keymap('n', '[d', '<cmd>lua vim.diagnostic.goto_prev()<CR>', options)
   buf_set_keymap('n', ']d', '<cmd>lua vim.diagnostic.goto_next()<CR>', options)
   buf_set_keymap('n', '<leader>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', options)
-
-  if client.server_capabilities.document_formatting then
-    buf_set_keymap('n', 'ff', '<cmd>lua vim.lsp.buf.format()<CR>', options)
-  elseif client.server_capabilities.document_range_formatting then
-    buf_set_keymap('n', 'ff', '<cmd>lua vim.lsp.buf.range_formatting()<CR>', options)
-  end
+  map('n', 'ff', function()
+    vim.lsp.buf.format { async = true }
+  end)
 end
 
 -- vim.api.nvim_exec([[
@@ -111,5 +108,32 @@ do
   table.insert(stars, star)
   u.iabbrev(n .. '*', table.concat(stars))
 end
+
+
+-- dap
+-- Start debugging session
+map("n", "<leader>ds", function()
+  dap.continue()
+  require 'dapui'.toggle()
+  vim.api.nvim_feedkeys(vim.api.nvim_replace_termcodes("<C-w>=", false, true, true), "n", false) -- Spaces buffers evenly
+end)
+
+-- Set breakpoints, get variable values, step into/out of functions, etc.
+map("n", "<leader>dl", require("dap.ui.widgets").hover)
+map("n", "<leader>dc", dap.continue)
+map("n", "<leader>db", dap.toggle_breakpoint)
+map("n", "<leader>dn", dap.step_over)
+map("n", "<leader>di", dap.step_into)
+map("n", "<leader>do", dap.step_out)
+map("n", "<leader>dC", dap.clear_breakpoints)
+
+-- Close debugger and clear breakpoints
+map("n", "<leader>de", function()
+  dap.clear_breakpoints()
+  require 'dapui'.toggle()
+  dap.terminate()
+  vim.api.nvim_feedkeys(vim.api.nvim_replace_termcodes("<C-w>=", false, true, true), "n", false)
+end)
+
 
 return M

@@ -87,7 +87,7 @@ end,
 })
 
 -- unknown files are 'text'
-autocmd('BufNewFile,BufRead', {
+autocmd({'BufNewFile', 'BufRead'}, {
   pattern = '*',
   callback = function()
     if vim.bo.filetype == "" then
@@ -97,7 +97,7 @@ end,
 })
 
 -- keymap files are dts
-autocmd('BufEnter,BufNewFile,BufRead', {
+autocmd({'BufEnter','BufNewFile','BufRead'}, {
   pattern = '*.keymap',
   callback = function()
     vim.bo.filetype = 'dts'
@@ -105,7 +105,7 @@ end
 })
 
 -- vim-textobj-quote only in ~/docs/writing
-autocmd('BufEnter,BufNewFile,BufRead', {
+autocmd({'BufEnter','BufNewFile','BufRead'}, {
   pattern = '*.md',
   callback = function()
     local cwd = vim.fn.expand('%:p')
@@ -121,7 +121,7 @@ end
 })
 
 -- mdx files are markdown
-autocmd('BufEnter,BufNewFile,BufRead', {
+autocmd({'BufEnter','BufNewFile','BufRead'}, {
   pattern = '*.mdx',
   callback = function()
     vim.bo.filetype = 'markdown'

@@ -16,13 +16,6 @@ nixpkgs-fmt
       gotools
       gopls
       go
-      cargo
-      rust-analyzer
-      rustc
-      # nodePackages.vscode-langservers-extracted
-      nodePackages.typescript-language-server
-      nodePackages.typescript
-      nodePackages.eslint
       sumneko-lua-language-server
 
       tree-sitter-grammars.tree-sitter-bash
@@ -36,6 +29,7 @@ tree-sitter-grammars.tree-sitter-vim
       tree-sitter-grammars.tree-sitter-nix
 
       zf
+      delve
     ];
     extraConfig = ''
       runtime _init.lua
@@ -50,7 +44,6 @@ cmp-nvim-lsp
       cmp-treesitter
       cmp-path
 
-
       nvim-lspconfig
       luasnip
       playground
@@ -62,6 +55,12 @@ nvim-treesitter-textobjects
       conflict-marker-vim
       vim-jsonnet
       vim-pencil
+
+      nvim-dap
+      nvim-dap-ui
+      nvim-dap-go
+      vim-textobj-user
+      dressing-nvim
     ];
   };
 }

@@ -34,7 +34,7 @@ set -g base-index 1
       setw -g pane-base-index 1
 
       # pane binds
-      bind -n M-n select-pane -D 
+      bind -n M-n select-pane -D
       bind -n M-e select-pane -U
       bind -n M-y select-pane -L
       bind -n M-o  select-pane -R