treewide: begin restructuring the module tree

modules/plugins/debugger/nvim-dap/config.nix

@@ -0,0 +1,72 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib.strings) optionalString;
+  inherit (lib.modules) mkIf mkMerge;
+  inherit (lib.attrsets) mapAttrs;
+  inherit (lib.nvim.binds) addDescriptionsToMappings mkSetLuaBinding;
+  inherit (lib.nvim.dag) entryAnywhere entryAfter;
+
+  cfg = config.vim.debugger.nvim-dap;
+  self = import ./nvim-dap.nix {inherit lib;};
+  mappingDefinitions = self.options.vim.debugger.nvim-dap.mappings;
+  mappings = addDescriptionsToMappings cfg.mappings mappingDefinitions;
+in {
+  config = mkMerge [
+    (mkIf cfg.enable {
+      vim.startPlugins = ["nvim-dap"];
+
+      vim.luaConfigRC =
+        {
+          # TODO customizable keymaps
+          nvim-dap = entryAnywhere ''
+            local dap = require("dap")
+            vim.fn.sign_define("DapBreakpoint", { text = "🛑", texthl = "ErrorMsg", linehl = "", numhl = "" })
+          '';
+        }
+        // mapAttrs (_: v: (entryAfter ["nvim-dap"] v)) cfg.sources;
+
+      vim.maps.normal = mkMerge [
+        (mkSetLuaBinding mappings.continue "require('dap').continue")
+        (mkSetLuaBinding mappings.restart "require('dap').restart")
+        (mkSetLuaBinding mappings.terminate "require('dap').terminate")
+        (mkSetLuaBinding mappings.runLast "require('dap').run_last")
+
+        (mkSetLuaBinding mappings.toggleRepl "require('dap').repl.toggle")
+        (mkSetLuaBinding mappings.hover "require('dap.ui.widgets').hover")
+        (mkSetLuaBinding mappings.toggleBreakpoint "require('dap').toggle_breakpoint")
+
+        (mkSetLuaBinding mappings.runToCursor "require('dap').run_to_cursor")
+        (mkSetLuaBinding mappings.stepInto "require('dap').step_into")
+        (mkSetLuaBinding mappings.stepOut "require('dap').step_out")
+        (mkSetLuaBinding mappings.stepOver "require('dap').step_over")
+        (mkSetLuaBinding mappings.stepBack "require('dap').step_back")
+
+        (mkSetLuaBinding mappings.goUp "require('dap').up")
+        (mkSetLuaBinding mappings.goDown "require('dap').down")
+      ];
+    })
+    (mkIf (cfg.enable && cfg.ui.enable) {
+      vim.startPlugins = ["nvim-dap-ui" "nvim-nio"];
+
+      vim.luaConfigRC.nvim-dap-ui = entryAfter ["nvim-dap"] (''
+          local dapui = require("dapui")
+          dapui.setup()
+        ''
+        + optionalString cfg.ui.autoStart ''
+          dap.listeners.after.event_initialized["dapui_config"] = function()
+            dapui.open()
+          end
+          dap.listeners.before.event_terminated["dapui_config"] = function()
+            dapui.close()
+          end
+          dap.listeners.before.event_exited["dapui_config"] = function()
+            dapui.close()
+          end
+        '');
+      vim.maps.normal = mkSetLuaBinding mappings.toggleDapUI "require('dapui').toggle";
+    })
+  ];
+}

modules/plugins/debugger/nvim-dap/default.nix

@@ -0,0 +1,6 @@
+{
+  imports = [
+    ./config.nix
+    ./nvim-dap.nix
+  ];
+}

modules/plugins/debugger/nvim-dap/nvim-dap.nix

@@ -0,0 +1,46 @@
+{lib, ...}: let
+  inherit (lib.options) mkEnableOption mkOption;
+  inherit (lib.types) bool attrsOf str;
+  inherit (lib.nvim.binds) mkMappingOption;
+in {
+  options.vim.debugger.nvim-dap = {
+    enable = mkEnableOption "debugging via nvim-dap";
+
+    ui = {
+      enable = mkEnableOption "UI extension for nvim-dap";
+      autoStart = mkOption {
+        type = bool;
+        default = true;
+        description = "Automatically Opens and Closes DAP-UI upon starting/closing a debugging session";
+      };
+    };
+
+    sources = mkOption {
+      default = {};
+      description = "List of debuggers to install";
+      type = attrsOf str;
+    };
+
+    mappings = {
+      continue = mkMappingOption "Contiue" "<leader>dc";
+      restart = mkMappingOption "Restart" "<leader>dR";
+      terminate = mkMappingOption "Terminate" "<leader>dq";
+      runLast = mkMappingOption "Re-run Last Debug Session" "<leader>d.";
+
+      toggleRepl = mkMappingOption "Toggle Repl" "<leader>dr";
+      hover = mkMappingOption "Hover" "<leader>dh";
+      toggleBreakpoint = mkMappingOption "Toggle breakpoint" "<leader>db";
+
+      runToCursor = mkMappingOption "Continue to the current cursor" "<leader>dgc";
+      stepInto = mkMappingOption "Step into function" "<leader>dgi";
+      stepOut = mkMappingOption "Step out of function" "<leader>dgo";
+      stepOver = mkMappingOption "Next step" "<leader>dgj";
+      stepBack = mkMappingOption "Step back" "<leader>dgk";
+
+      goUp = mkMappingOption "Go up stacktrace" "<leader>dvo";
+      goDown = mkMappingOption "Go down stacktrace" "<leader>dvi";
+
+      toggleDapUI = mkMappingOption "Toggle DAP-UI" "<leader>du";
+    };
+  };
+}