Add neovim config using nixvim

programs/nixvim/_plugins/avante.nix

@@ -0,0 +1,17 @@
+{ ... }:
+
+{
+  programs.nixvim = {
+    plugins.avante = {
+      enable = true;
+      settings = {
+        provider = "claude";
+        providers = {
+          claude = {
+            model = "claude-sonnet-4-5-20250929";
+          };
+        };
+      };
+    };
+  };
+}

programs/nixvim/_plugins/conform.nix

@@ -0,0 +1,36 @@
+{ ... }:
+
+{
+  programs.nixvim = {
+    plugins.conform-nvim = {
+      enable = true;
+      settings = {
+        formatters_by_ft = {
+          lua = [ "stylua" ];
+          nix = [ "nixfmt" ];
+          python = ''
+            function(bufnr)
+              if require("conform").get_formatter_info("ruff_format", bufnr).available then
+                return { "ruff_fix", "ruff_format" }
+              else
+                return { "isort", "black", "flake8" }
+              end
+            end
+          '';
+          scala = [ "scalafmt" ];
+          swift = [ "swift_format" ];
+          "*" = [ "trim_whitespace" "trim_newlines" ];
+        };
+        format_on_save = ''
+          function(bufnr)
+            -- Disable with a global or buffer-local variable
+            if vim.g.disable_autoformat or vim.b[bufnr].disable_autoformat then
+              return
+            end
+            return { timeout_ms = 500, lsp_fallback = true }
+          end
+        '';
+      };
+    };
+  };
+}

programs/nixvim/_plugins/default.nix

@@ -0,0 +1,105 @@
+{ ... }:
+
+{
+  imports = [
+    ./avante.nix
+    ./conform.nix
+    ./floaterm.nix
+    ./lsp.nix
+    ./lualine.nix
+    ./neo-tree.nix
+    ./telescope.nix
+    ./treesitter.nix
+  ];
+
+  # Global plugin configurations can go here
+  programs.nixvim = {
+    colorschemes.tokyonight = {
+      enable = true;
+      settings = {
+        style = "night";
+        on_colors.__raw = "function(colors) colors.bg = \"#000000\" end";
+      };
+    };
+
+    plugins = {
+      # Lazy loading
+      lz-n.enable = true;
+
+      web-devicons.enable = true;
+
+      gitsigns = {
+        enable = true;
+        settings.signs = {
+          add.text = "+";
+          change.text = "~";
+          delete.text = "_";
+          topdelete.text = "‾";
+          changedelete.text = "~";
+        };
+      };
+
+      nvim-autopairs.enable = true;
+
+      colorizer = {
+        enable = true;
+        settings.user_default_options.names = false;
+      };
+
+      copilot-vim.enable = true;
+
+      fidget.enable = true;
+
+      flash.enable = true;
+
+      img-clip = {
+        enable = true;
+        settings = {
+          default = {
+            embed_image_as_base64 = false;
+            prompt_for_file_name = false;
+            drag_and_drop = {
+              insert_mode = true;
+            };
+            use_absolute_path = true;
+          };
+        };
+      };
+
+      indent-blankline.enable = true;
+
+      markview.enable = true;
+
+      nui.enable = true;
+
+      oil = {
+        enable = true;
+        lazyLoad.settings.cmd = "Oil";
+      };
+
+      snacks.enable = true;
+
+      todo-comments = {
+        enable = true;
+        keymaps.todoTelescope.key = "<leader>t";
+      };
+
+      trim = {
+        enable = true;
+        settings = {
+          highlight = true;
+          ft_blocklist = [
+            "checkhealth"
+            "floaterm"
+            "lspinfo"
+            "neo-tree"
+            "TelescopePrompt"
+          ];
+        };
+      };
+
+      trouble.enable = true;
+      which-key.enable = true;
+    };
+  };
+}

programs/nixvim/_plugins/floaterm.nix

@@ -0,0 +1,14 @@
+{ ... }:
+
+{
+  programs.nixvim.plugins.floaterm = {
+    enable = true;
+
+    settings = {
+      width = 0.8;
+      height = 0.8;
+      title = "";
+      keymap_toggle = "<leader>,";
+    };
+  };
+}

programs/nixvim/_plugins/lsp.nix

@@ -0,0 +1,61 @@
+{ lib, ... }:
+
+{
+  programs.nixvim = {
+    diagnostic.settings.virtual_text = true;
+
+    lsp = {
+      inlayHints.enable = true;
+      servers = {
+        bashls.enable = true;
+        html.enable = true;
+        jqls.enable = true;
+        jsonls.enable = true;
+        lua_ls = {
+          enable = true;
+          settings.settings.diagnostics.globals = [ "vim" ];
+        };
+        marksman.enable = true;
+        metals.enable = true;
+        nil_ls.enable = true;
+        nixd.enable = true;
+        pyrefly.enable = true;
+        rust_analyzer.enable = true;
+        sourcekit.enable = true;
+        ts_ls.enable = true;
+        yamlls.enable = true;
+      };
+
+      keymaps =
+        lib.mapAttrsToList
+          (
+            key: props:
+            {
+              inherit key;
+              options.silent = true;
+            }
+            // props
+          )
+          {
+            "<leader>k".action.__raw = "function() vim.diagnostic.jump({ count=-1, float=true }) end";
+            "<leader>j".action.__raw = "function() vim.diagnostic.jump({ count=1, float=true }) end";
+            gd.lspBufAction = "definition";
+            gD.lspBufAction = "references";
+            gt.lspBufAction = "type_definition";
+            gi.lspBufAction = "implementation";
+            K.lspBufAction = "hover";
+            "<F2>".lspBufAction = "rename";
+          };
+    };
+
+    plugins = {
+      lsp-format = {
+        enable = true;
+        lspServersToEnable = "all";
+      };
+
+      # Sane defaults for all servers
+      lspconfig.enable = true;
+    };
+  };
+}

programs/nixvim/_plugins/lualine.nix

@@ -0,0 +1,49 @@
+{ ... }:
+
+{
+  programs.nixvim.plugins.lualine = {
+    enable = true;
+
+    settings = {
+      options.globalstatus = true;
+
+      sections = {
+        lualine_a = [ "mode" ];
+        lualine_b = [ "branch" ];
+        lualine_c = [
+          "filename"
+          "diff"
+        ];
+
+        lualine_x = [
+          "diagnostics"
+
+          {
+            __unkeyed.__raw = ''
+              function()
+                  local msg = ""
+                  local buf_ft = vim.api.nvim_buf_get_option(0, 'filetype')
+                  local clients = vim.lsp.get_clients()
+                  if next(clients) == nil then
+                      return msg
+                  end
+                  for _, client in ipairs(clients) do
+                      local filetypes = client.config.filetypes
+                      if filetypes and vim.fn.index(filetypes, buf_ft) ~= -1 then
+                          return client.name
+                      end
+                  end
+                  return msg
+              end
+            '';
+            icon = "";
+            color.fg = "#ffffff";
+          }
+          "encoding"
+          "fileformat"
+          "filetype"
+        ];
+      };
+    };
+  };
+}

programs/nixvim/_plugins/neo-tree.nix

@@ -0,0 +1,25 @@
+{ ... }:
+
+{
+  programs.nixvim = {
+    keymaps = [
+      {
+        mode = "n";
+        key = "<leader>m";
+        action = ":Neotree action=focus reveal toggle<CR>";
+        options.silent = true;
+      }
+    ];
+
+    plugins.neo-tree = {
+      enable = true;
+
+      closeIfLastWindow = true;
+      window = {
+        width = 30;
+        autoExpandWidth = true;
+        position = "right";
+      };
+    };
+  };
+}

programs/nixvim/_plugins/telescope.nix

@@ -0,0 +1,55 @@
+{ ... }:
+
+{
+  programs.nixvim = {
+    plugins.telescope = {
+      enable = true;
+
+      extensions = {
+        fzf-native.enable = true;
+        ui-select.enable = true;
+        undo.enable = true;
+      };
+
+      keymaps = {
+        "<leader>ff" = "find_files";
+        "<leader>fg" = "live_grep";
+        "<leader>b" = "buffers";
+        "<leader>fh" = "help_tags";
+        "<leader>fd" = "diagnostics";
+
+        "<C-p>" = "git_files";
+        "<leader>p" = "oldfiles";
+        "<C-f>" = "live_grep";
+      };
+
+      settings.defaults = {
+        file_ignore_patterns = [
+          "^.git/"
+          "^.mypy_cache/"
+          "^__pycache__/"
+          "^output/"
+          "^data/"
+          "%.ipynb"
+        ];
+        set_env.COLORTERM = "truecolor";
+      };
+    };
+
+    keymaps = [
+      {
+        mode = "n";
+        key = "<C-t>";
+        action.__raw = ''
+          function()
+            require('telescope.builtin').live_grep({
+              default_text="TODO",
+              initial_mode="normal"
+            })
+          end
+        '';
+        options.silent = true;
+      }
+    ];
+  };
+}

programs/nixvim/_plugins/treesitter.nix

@@ -0,0 +1,69 @@
+{ pkgs, ... }:
+
+{
+  programs.nixvim.plugins = {
+    treesitter = {
+      enable = true;
+
+      grammarPackages = with pkgs.vimPlugins.nvim-treesitter.builtGrammars; [
+        awk
+        bash
+        c
+        cpp
+        css
+        dockerfile
+        fish
+        git-rebase
+        gitattributes
+        gitcommit
+        gitignore
+        go
+        haskell
+        hocon
+        html
+        http
+        java
+        javascript
+        json
+        json5
+        jsonc
+        lua
+        make
+        markdown
+        markdown-inline
+        nix
+        proto
+        python
+        rust
+        scala
+        sql
+        swift
+        terraform
+        toml
+        typescript
+        vim
+        xml
+        yaml
+      ];
+
+      nixvimInjections = true;
+
+      settings = {
+        highlight.enable = true;
+        indent.enable = true;
+      };
+      folding = false;
+    };
+
+    treesitter-refactor = {
+      enable = true;
+      highlightDefinitions = {
+        enable = true;
+        # Set to false if you have an `updatetime` of ~100.
+        clearOnCursorMove = false;
+      };
+    };
+
+    hmts.enable = true;
+  };
+}

programs/nixvim/completion.nix

@@ -0,0 +1,65 @@
+{ ... }:
+
+{
+  programs.nixvim = {
+    opts.completeopt = [
+      "menu"
+      "menuone"
+      "noselect"
+    ];
+
+    plugins = {
+      luasnip.enable = true;
+
+      lspkind = {
+        enable = true;
+
+        settings = {
+          cmp = {
+            enable = true;
+            menu = {
+              nvim_lsp = "[LSP]";
+              nvim_lua = "[api]";
+              path = "[path]";
+              luasnip = "[snip]";
+              buffer = "[buffer]";
+              cmp_tabby = "[Tabby]";
+            };
+          };
+        };
+      };
+
+      cmp = {
+        enable = true;
+
+        settings = {
+          snippet.expand = ''
+            function(args)
+              require('luasnip').lsp_expand(args.body)
+            end
+          '';
+
+          mapping = {
+            "<C-d>" = "cmp.mapping.scroll_docs(-4)";
+            "<C-f>" = "cmp.mapping.scroll_docs(4)";
+            "<C-Space>" = "cmp.mapping.complete()";
+            "<C-e>" = "cmp.mapping.close()";
+            "<Tab>" = "cmp.mapping(cmp.mapping.select_next_item(), {'i', 's'})";
+            "<S-Tab>" = "cmp.mapping(cmp.mapping.select_prev_item(), {'i', 's'})";
+            "<CR>" = "cmp.mapping.confirm({ select = true })";
+          };
+
+          sources = [
+            { name = "path"; }
+            { name = "nvim_lsp"; }
+            { name = "luasnip"; }
+            {
+              name = "buffer";
+              option.get_bufnrs.__raw = "vim.api.nvim_list_bufs";
+            }
+          ];
+        };
+      };
+    };
+  };
+}

programs/nixvim/default.nix

@@ -0,0 +1,21 @@
+{ pkgs, ... }:
+
+{
+  imports = [
+    ./options.nix
+    ./keymappings.nix
+    ./completion.nix
+    ./_plugins
+  ];
+
+  programs.nixvim = {
+    enable = true;
+
+    defaultEditor = true;
+
+    nixpkgs.useGlobalPackages = true;
+
+    viAlias = true;
+    vimAlias = true;
+  };
+}

programs/nixvim/keymappings.nix

@@ -0,0 +1,53 @@
+{ lib, ... }:
+
+{
+  programs.nixvim = {
+    keymaps =
+      let
+        normal =
+          lib.mapAttrsToList
+            (
+              key: action: {
+                mode = "n";
+                inherit action key;
+              }
+            )
+            {
+              "<Space>" = "<NOP>";
+              "<esc>" = ":noh<CR>";
+              "Y" = "y$";
+              "<C-c>" = ":b#<CR>";
+              "<C-x>" = ":close<CR>";
+              "<leader>s" = ":w<CR>";
+              "<C-s>" = ":w<CR>";
+              "<leader>h" = "<C-w>h";
+              "<leader>l" = "<C-w>l";
+              "L" = "$";
+              "H" = "^";
+              "<C-Up>" = ":resize -2<CR>";
+              "<C-Down>" = ":resize +2<CR>";
+              "<C-Left>" = ":vertical resize +2<CR>";
+              "<C-Right>" = ":vertical resize -2<CR>";
+              "<M-k>" = ":move-2<CR>";
+              "<M-j>" = ":move+<CR>";
+            };
+        visual =
+          lib.mapAttrsToList
+            (
+              key: action: {
+                mode = "v";
+                inherit action key;
+              }
+            )
+            {
+              ">" = ">gv";
+              "<" = "<gv";
+              "<TAB>" = ">gv";
+              "<S-TAB>" = "<gv";
+              "K" = ":m '<-2<CR>gv=gv";
+              "J" = ":m '>+1<CR>gv=gv";
+            };
+      in
+      normal ++ visual;
+  };
+}

programs/nixvim/options.nix

@@ -0,0 +1,36 @@
+{ pkgs, ... }:
+
+{
+  programs.nixvim = {
+
+    clipboard = {
+      register = "unnamedplus";
+    };
+
+    opts = {
+      backup = false;
+      breakindent = true;
+      expandtab = true;
+      hlsearch = true;
+      incsearch = true;
+      mouse = "a";
+      number = true;
+      relativenumber = true;
+      scrolloff = 8;
+      shiftwidth = 2;
+      signcolumn = "yes";
+      smartindent = true;
+      swapfile = false;
+      tabstop = 2;
+      termguicolors = true;
+      undofile = true;
+      updatetime = 250;
+      wrap = false;
+    };
+
+    globals = {
+      mapleader = " ";
+      maplocalleader = " ";
+    };
+  };
+}