From f4fb8fe907a06ae5cb45509df925872b3d073b07 Mon Sep 17 00:00:00 2001
From: Wesley Irvin <wesley@wesirvin.com>
Date: Mon, 5 Aug 2024 11:26:38 -0400
Subject: [PATCH] Code Completions

Added in all the required plugins to get code completions, snippets,
linting, and formatting working. Also configured to auto install
a LSP for any language that isn't currently installed.
---
 .../nvim/lua/plugins/completions.lua          | 52 +++++++++++++++++++
 .../nvim/lua/plugins/lsp-config.lua           | 43 +++++++++------
 nvim/dot-config/nvim/lua/plugins/none-ls.lua  | 19 +++++++
 .../nvim/lua/plugins/treesitter.lua           |  1 +
 4 files changed, 100 insertions(+), 15 deletions(-)
 create mode 100644 nvim/dot-config/nvim/lua/plugins/completions.lua
 create mode 100644 nvim/dot-config/nvim/lua/plugins/none-ls.lua

diff --git a/nvim/dot-config/nvim/lua/plugins/completions.lua b/nvim/dot-config/nvim/lua/plugins/completions.lua
new file mode 100644
index 0000000..986110f
--- /dev/null
+++ b/nvim/dot-config/nvim/lua/plugins/completions.lua
@@ -0,0 +1,52 @@
+return {
+	{
+		"hrsh7th/cmp-nvim-lsp",
+	},
+	{
+		"L3MON4D3/LuaSnip",
+		dependencies = {
+			"saadparwaiz1/cmp_luasnip",
+			"rafamadriz/friendly-snippets",
+		},
+	},
+	{
+		"hrsh7th/nvim-cmp",
+		config = function()
+			local cmp = require("cmp")
+			require("luasnip.loaders.from_vscode").lazy_load()
+
+			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+)
+					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" },
+				}),
+			})
+		end,
+	},
+}
diff --git a/nvim/dot-config/nvim/lua/plugins/lsp-config.lua b/nvim/dot-config/nvim/lua/plugins/lsp-config.lua
index 645de15..c7c20a7 100644
--- a/nvim/dot-config/nvim/lua/plugins/lsp-config.lua
+++ b/nvim/dot-config/nvim/lua/plugins/lsp-config.lua
@@ -1,13 +1,13 @@
 return {
 	{
 		"williamboman/mason.nvim",
-		config = function ()
+		config = function()
 			require("mason").setup()
-		end
+		end,
 	},
 	{
 		"williamboman/mason-lspconfig.nvim",
-		config = function ()
+		config = function()
 			require("mason-lspconfig").setup({
 				ensure_installed = {
 					"clangd",
@@ -16,24 +16,37 @@ return {
 					"pyright",
 					"rust_analyzer",
 					"taplo",
-				}
+				},
 			})
-		end
+		end,
 	},
 	{
 		"neovim/nvim-lspconfig",
 		config = function()
+			local capabilities = require("cmp_nvim_lsp").default_capabilities()
 			local lspconfig = require("lspconfig")
-			lspconfig.clangd.setup({})
-			lspconfig.cmake.setup({})
-			lspconfig.lua_ls.setup({})
-			lspconfig.pyright.setup({})
-			lspconfig.rust_analyzer.setup({})
-			lspconfig.taplo.setup({})
+			lspconfig.clangd.setup({
+				capabilities = capabilities
+			})
+			lspconfig.cmake.setup({
+				capabilities = capabilities
+			})
+			lspconfig.lua_ls.setup({
+				capabilities = capabilities
+			})
+			lspconfig.pyright.setup({
+				capabilities = capabilities
+			})
+			lspconfig.rust_analyzer.setup({
+				capabilities = capabilities
+			})
+			lspconfig.taplo.setup({
+				capabilities = capabilities
+			})
 
-			vim.keymap.set('n', 'K', vim.lsp.buf.hover, {})
-			vim.keymap.set('n', 'gd', vim.lsp.buf.definition, {})
-			vim.keymap.set('n', '<leader>ca', vim.lsp.buf.code_action, {})
-		end
+			vim.keymap.set("n", "K", vim.lsp.buf.hover, {})
+			vim.keymap.set("n", "gd", vim.lsp.buf.definition, {})
+			vim.keymap.set("n", "<leader>ca", vim.lsp.buf.code_action, {})
+		end,
 	},
 }
diff --git a/nvim/dot-config/nvim/lua/plugins/none-ls.lua b/nvim/dot-config/nvim/lua/plugins/none-ls.lua
new file mode 100644
index 0000000..6ab0d85
--- /dev/null
+++ b/nvim/dot-config/nvim/lua/plugins/none-ls.lua
@@ -0,0 +1,19 @@
+return {
+	"nvimtools/none-ls.nvim",
+	config = function()
+		local null_ls = require("null-ls")
+
+		null_ls.setup({
+			sources = {
+				null_ls.builtins.formatting.black,
+				null_ls.builtins.formatting.clang_format,
+				null_ls.builtins.formatting.gersemi,
+				null_ls.builtins.formatting.stylua,
+				null_ls.builtins.diagnostics.cpplint,
+				null_ls.builtins.diagnostics.pylint,
+			},
+		})
+
+		vim.keymap.set("n", "<leader>gf", vim.lsp.buf.format, {})
+	end,
+}
diff --git a/nvim/dot-config/nvim/lua/plugins/treesitter.lua b/nvim/dot-config/nvim/lua/plugins/treesitter.lua
index 1ca5b94..60b809d 100644
--- a/nvim/dot-config/nvim/lua/plugins/treesitter.lua
+++ b/nvim/dot-config/nvim/lua/plugins/treesitter.lua
@@ -5,6 +5,7 @@ return{
 		local configs = require("nvim-treesitter.configs")
 		configs.setup({
 			ensure_installed = { "c", "cmake", "cpp", "lua", "python", "rust", "toml" },
+			auto_install = true,
 			highlight = { enable = true },
 			indent = { enable = true },
 		})
-- 
2.49.1