working completion

flake.nix

@@ -177,6 +177,7 @@
             ./modules/neovim/plugins/bufferline.nix
             ./modules/neovim/plugins/telescope.nix
             ./modules/neovim/plugins/lsp.nix
+            ./modules/neovim/plugins/completion.nix
           ];
         };
 

modules/neovim/plugins/completion.nix

@@ -0,0 +1,155 @@
+{ pkgs, dsl, ... }: {
+
+  plugins = [
+    pkgs.vimPlugins.cmp-nvim-lsp
+    pkgs.vimPlugins.cmp-buffer
+    pkgs.vimPlugins.cmp-path
+    pkgs.vimPlugins.cmp-cmdline
+    pkgs.vimPlugins.cmp-nvim-lua
+    pkgs.vimPlugins.luasnip
+    pkgs.vimPlugins.cmp_luasnip
+    pkgs.vimPlugins.cmp-rg
+    pkgs.vimPlugins.friendly-snippets
+  ];
+
+  use.cmp.setup = dsl.callWith {
+
+    # Disable in telescope buffers
+    enabled = dsl.rawLua ''
+      function()
+          if vim.bo.buftype == "prompt" then
+              return false
+          end
+          return true
+      end
+    '';
+
+    snippet.expand = dsl.rawLua ''
+      function(args)
+          require("luasnip").lsp_expand(args.body)
+      end
+    '';
+
+    mapping = {
+      "['<C-n>']" = dsl.rawLua
+        "require('cmp').mapping.select_next_item({ behavior = require('cmp').SelectBehavior.Insert })";
+      "['<C-p>']" = dsl.rawLua
+        "require('cmp').mapping.select_prev_item({ behavior = require('cmp').SelectBehavior.Insert })";
+      "['<Down>']" = dsl.rawLua
+        "require('cmp').mapping.select_next_item({ behavior = require('cmp').SelectBehavior.Select })";
+      "['<Up>']" = dsl.rawLua
+        "require('cmp').mapping.select_prev_item({ behavior = require('cmp').SelectBehavior.Select })";
+      "['<C-d>']" = dsl.rawLua "require('cmp').mapping.scroll_docs(-4)";
+      "['<C-f>']" = dsl.rawLua "require('cmp').mapping.scroll_docs(4)";
+      "['<C-e>']" = dsl.rawLua "require('cmp').mapping.abort()";
+      "['<CR>']" = dsl.rawLua
+        "require('cmp').mapping.confirm({ behavior = require('cmp').ConfirmBehavior.Replace, select = true, })";
+      "['<C-r>']" = dsl.rawLua
+        "require('cmp').mapping.confirm({ behavior = require('cmp').ConfirmBehavior.Replace, select = true, })";
+      "['<Esc>']" = dsl.rawLua ''
+        function(_)
+            cmp.mapping({
+                i = cmp.mapping.abort(),
+                c = cmp.mapping.close(),
+            })
+            vim.cmd("stopinsert") --- Abort and leave insert mode
+        end
+      '';
+      "['<C-l>']" = dsl.rawLua ''
+        cmp.mapping(function(_)
+            if require("luasnip").expand_or_jumpable() then
+                require("luasnip").expand_or_jump()
+            end
+        end, { "i", "s" })
+      '';
+    };
+
+    sources = [
+      { name = "nvim_lua"; }
+      { name = "nvim_lsp"; }
+      { name = "luasnip"; }
+      { name = "path"; }
+      {
+        name = "buffer";
+        keyword_length = 3;
+        max_item_count = 10;
+      }
+      {
+        name = "rg";
+        keyword_length = 6;
+        max_item_count = 10;
+        option = { additional_arguments = "--ignore-case"; };
+      }
+    ];
+
+    formatting = {
+      fields = [ "kind" "abbr" "menu" ];
+      format = dsl.rawLua ''
+        function(entry, vim_item)
+            local kind_icons = {
+                Text = "",
+                Method = "m",
+                Function = "",
+                Constructor = "",
+                Field = "",
+                Variable = "",
+                Class = "",
+                Interface = "",
+                Module = "",
+                Property = "",
+                Unit = "",
+                Value = "",
+                Enum = "",
+                Keyword = "",
+                Snippet = "",
+                Color = "",
+                File = "",
+                Reference = "",
+                Folder = "",
+                EnumMember = "",
+                Constant = "",
+                Struct = "",
+                Event = "",
+                Operator = "",
+                TypeParameter = "",
+            }
+            vim_item.kind = string.format("%s", kind_icons[vim_item.kind])
+            vim_item.menu = ({
+                luasnip = "[Snippet]",
+                buffer = "[Buffer]",
+                path = "[Path]",
+                rg = "[Grep]",
+                nvim_lsp = "[LSP]",
+                nvim_lua = "[Lua]",
+            })[entry.source.name]
+            return vim_item
+        end
+      '';
+    };
+
+    experimental = {
+      native_menu = false; # Use cmp menu instead of Vim menu
+      ghost_text = true; # Show preview auto-completion
+    };
+
+  };
+
+  lua = ''
+    -- Use buffer source for `/`
+    require('cmp').setup.cmdline("/", {
+        sources = {
+            { name = "buffer", keyword_length = 5 },
+        },
+    })
+
+    -- Use cmdline & path source for ':'
+    require('cmp').setup.cmdline(":", {
+        sources = require('cmp').config.sources({
+            { name = "path" },
+        }, {
+            { name = "cmdline" },
+        }),
+    })
+  '';
+
+}