Configure DAP windows for python.

Also add vim bindings for lua_ls.

jrpotter/neovim/default.nix

@@ -1,7 +1,18 @@
 { config, pkgs, lib, ... }:
 let
+  pluginGit = rev: repo: pkgs.vimUtils.buildVimPluginFrom2Nix {
+    pname = "${lib.strings.sanitizeDerivationName repo}";
+    version = builtins.substring 0 7 rev;
+    src = builtins.fetchGit {
+      url = "https://github.com/${repo}.git";
+      rev = rev;
+    };
+  };
+
   nvim-dap = {
-    plugin = pkgs.vimPlugins.nvim-dap;
+    plugin = pluginGit
+      "e154fdb6d70b3765d71f296e718b29d8b7026a63"
+      "mfussenegger/nvim-dap";
     config = config.programs.neovim.nvim-dap;
   };
 
@@ -66,10 +77,11 @@ in
 
   config = {
     programs.neovim = {
-      plugins = map (p: {
-        inherit (p) plugin;
-        config = "lua << EOF\n${p.config}\nEOF";
-      }) [
+      plugins = map (p:
+        if builtins.hasAttr "config" p then {
+          inherit (p) plugin;
+          config = "lua << EOF\n${p.config}\nEOF";
+        } else p) [
         nvim-dap
         nvim-lspconfig
         nvim-treesitter
@@ -95,6 +107,8 @@ in
         '')
       # Extra Lua configuration to be appended to `init.lua`.
       (lib.mkAfter ''
+        vim.g.mapleader = ' '
+        vim.g.maplocalleader = '\\'
         vim.o.colorcolumn = '80,100'
         vim.o.expandtab = true  -- Spaces instead of tabs.
         vim.o.shiftwidth = 2    -- # of spaces to use for each (auto)indent.

jrpotter/neovim/lang/lua.nix

@@ -2,7 +2,7 @@
 {
   programs.neovim = {
     nvim-lspconfig = ''
-      require('lspconfig').lua_ls.setup { }
+      require('init.lua').nvim_lspconfig()
     '';
 
     extraPackages = [ pkgs.lua-language-server ];

jrpotter/neovim/lang/python.nix

@@ -23,4 +23,8 @@ in
 
     extraPackages = [ venv ];
   };
+
+  xdg.configFile."nvim/after/ftplugin/python.lua".text = ''
+    require('init.dap').buffer_map()
+  '';
 }

jrpotter/neovim/lua/init/dap.lua

@@ -0,0 +1,85 @@
+local M = {}
+
+local function sidebar_new(widget)
+  return require('dap.ui.widgets').sidebar(widget, { width = 40 }, '')
+end
+
+local function sidebar_is_open(sidebar)
+  return sidebar.win and vim.api.nvim_win_is_valid(sidebar.win)
+end
+
+function M.buffer_map()
+  local function set_nnoremap(key, func)
+    vim.keymap.set(
+      'n',
+      string.format('<localleader>%s', key),
+      func,
+      { buffer = true }
+    )
+  end
+
+  local dap = require('dap')
+  local dap_ui_widgets = require('dap.ui.widgets')
+
+  local sidebars = {
+    expression = sidebar_new(dap_ui_widgets.expression),
+    frames = sidebar_new(dap_ui_widgets.frames),
+    scopes = sidebar_new(dap_ui_widgets.scopes),
+    sessions = sidebar_new(dap_ui_widgets.sessions),
+    threads = sidebar_new(dap_ui_widgets.threads),
+  }
+
+  local function any_sidebar_open()
+    for _, sb in pairs(sidebars) do
+      if sidebar_is_open(sb) then
+        return true
+      end
+    end
+    return false
+  end
+
+  local function toggle_sidebar(sidebar)
+    if sidebar_is_open(sidebar) then
+      sidebar.close({ mode = 'toggle' })
+    else
+      local win_id = vim.fn.win_getid()
+      vim.cmd.wincmd('t')  -- Move to topleft-most window.
+      vim.cmd(any_sidebar_open() and 'leftabove split' or 'vertical topleft split')
+      sidebar.open()
+      vim.fn.win_gotoid(win_id)
+    end
+  end
+
+  set_nnoremap('<localleader>', dap.continue)
+  set_nnoremap('b', dap.toggle_breakpoint)
+  set_nnoremap('n', dap.step_over)
+  set_nnoremap('x', dap.clear_breakpoints)
+  set_nnoremap('we', function()
+    toggle_sidebar(sidebars.expression)
+  end)
+  set_nnoremap('wf', function()
+    toggle_sidebar(sidebars.frames)
+  end)
+  set_nnoremap('wc', function()
+    toggle_sidebar(sidebars.scopes)
+  end)
+  set_nnoremap('wr', function()
+    dap.repl.toggle({ height = 10 })
+  end)
+  set_nnoremap('ws', function()
+    toggle_sidebar(sidebars.sessions)
+  end)
+  set_nnoremap('wt', function()
+    toggle_sidebar(sidebars.threads)
+  end)
+  set_nnoremap('wx', function()
+    for _, sb in pairs(sidebars) do
+      if sidebar_is_open(sb) then
+        toggle_sidebar(sb)
+      end
+      dap.repl.close()
+    end
+  end)
+end
+
+return M

jrpotter/neovim/lua/init/lua.lua

@@ -0,0 +1,38 @@
+local M = {}
+
+function M.nvim_lspconfig()
+  require('lspconfig').lua_ls.setup {
+    -- Provide completions, analysis, and location handling for plugins on the
+    -- vim runtime path.
+    -- https://github.com/neovim/nvim-lspconfig/blob/48347089666d5b77d054088aa72e4e0b58026e6e/doc/server_configurations.md#lua_ls
+    on_init = function(client)
+      local path = client.workspace_folders[1].name
+      if (
+        not vim.loop.fs_stat(path .. '/.luarc.json') and
+        not vim.loop.fs_stat(path .. '/.luarc.jsonc')
+      ) then
+        client.config.settings = vim.tbl_deep_extend(
+          'force', client.config.settings, {
+            Lua = {
+              runtime = {
+                version = 'LuaJIT'
+              },
+              workspace = {
+                checkThirdParty = false,
+                library = {
+                  vim.env.VIMRUNTIME
+                }
+              }
+            }
+          })
+
+        client.notify("workspace/didChangeConfiguration", {
+          settings = client.config.settings,
+        })
+      end
+      return true
+    end
+  }
+end
+
+return M

jrpotter/neovim/lua/init/python.lua

@@ -1,6 +1,6 @@
-local module = {}
+local M = {}
 
-function module.nvim_dap(options)
+function M.nvim_dap(options)
   local dap = require('dap')
 
   dap.adapters.python = function(callback, config)
@@ -25,7 +25,7 @@ function module.nvim_dap(options)
   })
 end
 
-function module.nvim_lspconfig()
+function M.nvim_lspconfig()
   require('lspconfig').pylsp.setup {
     settings = {
       pylsp = {
@@ -46,4 +46,4 @@ function module.nvim_lspconfig()
   }
 end
 
-return module
+return M