feat: initial commit

users/gandalf/modules/neovim.nix

@@ -0,0 +1,131 @@
+{ pkgs, ... }: {
+  programs.neovim = {
+    enable = true;
+    defaultEditor = true;
+    vimAlias = true;
+    plugins = with pkgs.vimPlugins; [
+      telescope-nvim
+      toggleterm-nvim
+      nvim-tree-lua
+      (nvim-treesitter.withPlugins (_: pkgs.tree-sitter.allGrammars))
+      nvim-lspconfig
+    ];
+    extraPackages = with pkgs; [
+      nil
+      nixpkgs-fmt
+    ];
+    extraLuaConfig = ''
+      vim.g.loaded_netrw = 1
+      vim.g.loaded_netrwPlugin = 1
+
+      -- set termguicolors to enable highlight groups
+      vim.opt.termguicolors = true
+
+      local set = vim.opt
+      set.tabstop = 2
+      set.shiftwidth = 2
+      set.softtabstop = 2
+      set.expandtab = true
+      -- needed for toggleterm
+      set.hidden = true
+
+      -- nvim-tree setup
+      local nvimtree = require('nvim-tree')
+      local nvimtreeapi = require('nvim-tree.api')
+      local function nvimtree_on_attach(bufnr)
+        local api = require "nvim-tree.api"
+
+        local function opts(desc)
+          return { desc = "nvim-tree: " .. desc, buffer = bufnr, noremap = true, silent = true, nowait = true }
+        end
+
+        -- default mappings
+        api.config.mappings.default_on_attach(bufnr)
+
+        -- custom mappings
+        vim.keymap.set('n', '<C-t>', api.tree.toggle, {})
+        vim.keymap.set('n', '?',     api.tree.toggle_help, opts('Help'))
+      end
+      nvimtree.setup({
+        on_attach = nvimtree_on_attach,
+      })
+      vim.keymap.set('n', '<C-t>', nvimtreeapi.tree.toggle, {})
+
+      -- telescope setup
+      local telescope = require('telescope.builtin')
+      vim.keymap.set('n', '<leader>ff', telescope.find_files, {})
+      vim.keymap.set('n', '<leader>fg', telescope.live_grep, {})
+      vim.keymap.set('n', '<leader>fb', telescope.buffers, {})
+      vim.keymap.set('n', '<leader>fh', telescope.help_tags, {})
+
+      -- toggleterm setup
+      local toggleterm = require('toggleterm')
+      toggleterm.setup{
+        open_mapping = [[<c-\>]],
+        hide_numbers = false,
+        autochdir = true,
+        direction = 'float',
+        float_opts = {
+          border = 'curved',
+        },
+      }
+
+      -- nvim-treesitter
+      local treesitter = require('nvim-treesitter.configs')
+      treesitter.setup {
+        indent = {
+          enable = true
+        },
+        highlight = {
+          enable = true
+        },
+      }
+
+      -- nvim-lspconfig
+      local lspconfig = require('lspconfig')
+      lspconfig.nil_ls.setup {
+        settings = {
+          ['nil'] = {
+            formatting = {
+              command = { "nixpkgs-fmt" },
+            },
+          },
+        },
+      }
+
+      vim.keymap.set('n', '[d', vim.diagnostic.goto_prev)
+      vim.keymap.set('n', ']d', vim.diagnostic.goto_next)
+
+      -- Use LspAttach autocommand to only map the following keys
+      -- after the language server attaches to the current buffer
+      vim.api.nvim_create_autocmd('LspAttach', {
+        group = vim.api.nvim_create_augroup('UserLspConfig', {}),
+        callback = function(ev)
+          -- Enable completion triggered by <c-x><c-o>
+          vim.bo[ev.buf].omnifunc = 'v:lua.vim.lsp.omnifunc'
+
+          -- Buffer local mappings.
+          -- See `:help vim.lsp.*` for documentation on any of the below functions
+          local opts = { buffer = ev.buf }
+          vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, opts)
+          vim.keymap.set('n', 'gd', vim.lsp.buf.definition, opts)
+          vim.keymap.set('n', 'K', vim.lsp.buf.hover, opts)
+          vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, opts)
+          -- vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, opts)
+          -- vim.keymap.set('n', '<space>wa', vim.lsp.buf.add_workspace_folder, opts)
+          -- vim.keymap.set('n', '<space>wr', vim.lsp.buf.remove_workspace_folder, opts)
+          -- vim.keymap.set('n', '<space>wl', function()
+          --   print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
+          -- end, opts)
+          vim.keymap.set('n', '<space>D', vim.lsp.buf.type_definition, opts)
+          -- vim.keymap.set('n', '<space>rn', vim.lsp.buf.rename, opts)
+          -- vim.keymap.set({ 'n', 'v' }, '<space>ca', vim.lsp.buf.code_action, opts)
+          vim.keymap.set('n', 'gr', vim.lsp.buf.references, opts)
+          vim.keymap.set('n', '<space>f', function()
+            vim.lsp.buf.format { async = true }
+          end, opts)
+        end,
+      })
+    '';
+  };
+}