trying to add cmp

flake.lock

@@ -198,6 +198,30 @@
         "type": "github"
       }
     },
+    "plugin-cmp": {
+      "flake": false,
+      "locked": {
+        "narHash": "sha256-9tXrFiQyeIgGf4Q9fSdkrWgfumTjV4Dgr5Jss9k14nU=",
+        "type": "file",
+        "url": "https://github.com/hrsh7th/nvim-cmp"
+      },
+      "original": {
+        "type": "file",
+        "url": "https://github.com/hrsh7th/nvim-cmp"
+      }
+    },
+    "plugin-cmp-vsnip": {
+      "flake": false,
+      "locked": {
+        "narHash": "sha256-9xQVRhyv4RcqptqOUCJcEirVnQ64z2Rz4hX3eGv+2rw=",
+        "type": "file",
+        "url": "https://github.com/hrsh7th/cmp-vsnip"
+      },
+      "original": {
+        "type": "file",
+        "url": "https://github.com/hrsh7th/cmp-vsnip"
+      }
+    },
     "plugin-dracula": {
       "flake": false,
       "locked": {
@@ -246,6 +270,8 @@
       "inputs": {
         "neovim": "neovim",
         "nixpkgs": "nixpkgs",
+        "plugin-cmp": "plugin-cmp",
+        "plugin-cmp-vsnip": "plugin-cmp-vsnip",
         "plugin-dracula": "plugin-dracula",
         "plugin-gruvbox": "plugin-gruvbox",
         "plugin-lsp": "plugin-lsp"

flake.nix

@@ -21,6 +21,15 @@
       url = "https://github.com/neovim/nvim-lspconfig";
       flake = false;
     };
+    plugin-cmp = {
+      url = "https://github.com/hrsh7th/nvim-cmp";
+      flake = false;
+    };
+    plugin-cmp-vsnip = {
+      url = "https://github.com/hrsh7th/cmp-vsnip";
+      flake = false;
+    };
+
   };
   
   outputs = { self, nixpkgs, neovim, ... }@inputs: {
@@ -34,9 +43,90 @@
 	      configure.customRC = ''
           set runtimepath+=${inputs.plugin-dracula}
           set runtimepath+=${inputs.plugin-lsp}
+          set runtimepath+=${inputs.plugin-cmp}
 	        colorscheme dracula
-	      autocmd BufEnter * :setlocal tabstop=4 shiftwidth=4 expandtab
+	        autocmd BufEnter * :setlocal tabstop=2 shiftwidth=2 expandtab
           autocmd BufEnter *.nix :setlocal tabstop=2 shiftwidth=2 expandtab
+          lua <<EOF
+  -- Set up nvim-cmp.
+  local cmp = require'cmp'
+
+  cmp.setup({
+    snippet = {
+      -- REQUIRED - you must specify a snippet engine
+      expand = function(args)
+        vim.fn["vsnip#anonymous"](args.body) -- For `vsnip` users.
+        -- require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
+        -- require('snippy').expand_snippet(args.body) -- For `snippy` users.
+        -- vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
+        -- vim.snippet.expand(args.body) -- For native neovim snippets (Neovim v0.10+)
+
+        -- For `mini.snippets` users:
+        -- local insert = MiniSnippets.config.expand.insert or MiniSnippets.default_insert
+        -- insert({ body = args.body }) -- Insert at cursor
+        -- cmp.resubscribe({ "TextChangedI", "TextChangedP" })
+        -- require("cmp.config").set_onetime({ sources = {} })
+      end,
+    },
+    window = {
+      -- completion = cmp.config.window.bordered(),
+      -- documentation = cmp.config.window.bordered(),
+    },
+    mapping = cmp.mapping.preset.insert({
+      ['<C-b>'] = cmp.mapping.scroll_docs(-4),
+      ['<C-f>'] = cmp.mapping.scroll_docs(4),
+      ['<C-Space>'] = cmp.mapping.complete(),
+      ['<C-e>'] = cmp.mapping.abort(),
+      ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+    }),
+    sources = cmp.config.sources({
+      { name = 'nvim_lsp' },
+      { name = 'vsnip' }, -- For vsnip users.
+      -- { name = 'luasnip' }, -- For luasnip users.
+      -- { name = 'ultisnips' }, -- For ultisnips users.
+      -- { name = 'snippy' }, -- For snippy users.
+    }, {
+      { name = 'buffer' },
+    })
+  })
+
+  -- To use git you need to install the plugin petertriho/cmp-git and uncomment lines below
+  -- Set configuration for specific filetype.
+  --[[ cmp.setup.filetype('gitcommit', {
+    sources = cmp.config.sources({
+      { name = 'git' },
+    }, {
+      { name = 'buffer' },
+    })
+ })
+ require("cmp_git").setup() ]]-- 
+
+  -- Use buffer source for `/` and `?` (if you enabled `native_menu`, this won't work anymore).
+  cmp.setup.cmdline({ '/', '?' }, {
+    mapping = cmp.mapping.preset.cmdline(),
+    sources = {
+      { name = 'buffer' }
+    }
+  })
+
+  -- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
+  cmp.setup.cmdline(':', {
+    mapping = cmp.mapping.preset.cmdline(),
+    sources = cmp.config.sources({
+      { name = 'path' }
+    }, {
+      { name = 'cmdline' }
+    }),
+    matching = { disallow_symbol_nonprefix_matching = false }
+  })
+
+  -- Set up lspconfig.
+  local capabilities = require('cmp_nvim_lsp').default_capabilities()
+  -- Replace <YOUR_LSP_SERVER> with each lsp server you've enabled.
+  require('lspconfig')[pyright, rust_analyzer].setup {
+    capabilities = capabilities
+  }
+EOF
         '';
 	    };
     };