From 67e4663479082532c2116c5e940defda563ad3c6 Mon Sep 17 00:00:00 2001
From: Petr Hrdina <petr@phrdina.cz>
Date: Wed, 14 Jan 2026 23:05:58 +0100
Subject: [PATCH] Add LSP config

---
 lazy-lock.json      |   8 ++++
 lua/config/lazy.lua |   1 +
 lua/plugins/lsp.lua | 114 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 123 insertions(+)
 create mode 100644 lua/plugins/lsp.lua

diff --git a/lazy-lock.json b/lazy-lock.json
index d4d1cbf..5cf2cb9 100644
--- a/lazy-lock.json
+++ b/lazy-lock.json
@@ -1,8 +1,16 @@
 {
+  "LuaSnip": { "branch": "master", "commit": "3732756842a2f7e0e76a7b0487e9692072857277" },
   "catppuccin": { "branch": "main", "commit": "beaf41a30c26fd7d6c386d383155cbd65dd554cd" },
+  "cmp-nvim-lsp": { "branch": "main", "commit": "cbc7b02bb99fae35cb42f514762b89b5126651ef" },
   "gruvbox.nvim": { "branch": "main", "commit": "a472496e1a4465a2dd574389dcf6cdb29af9bf1b" },
   "lazy.nvim": { "branch": "main", "commit": "306a05526ada86a7b30af95c5cc81ffba93fef97" },
+  "mason-lspconfig.nvim": { "branch": "main", "commit": "80c0130c5f16b551865a69e832f1feadeedb5fbe" },
+  "mason.nvim": { "branch": "main", "commit": "44d1e90e1f66e077268191e3ee9d2ac97cc18e65" },
+  "nvim-cmp": { "branch": "main", "commit": "85bbfad83f804f11688d1ab9486b459e699292d6" },
+  "nvim-lspconfig": { "branch": "master", "commit": "92ee7d42320edfbb81f3cad851314ab197fa324a" },
+  "nvim-tree.lua": { "branch": "master", "commit": "ca8d82fff26cb12ced239713e3222f4a9dcd0da0" },
   "nvim-treesitter": { "branch": "main", "commit": "5a7e5638e7d220575b1c22c8a2e099b52231886e" },
+  "nvim-web-devicons": { "branch": "master", "commit": "803353450c374192393f5387b6a0176d0972b848" },
   "plenary.nvim": { "branch": "master", "commit": "b9fd5226c2f76c951fc8ed5923d85e4de065e509" },
   "telescope.nvim": { "branch": "master", "commit": "a8c2223ea6b185701090ccb1ebc7f4e41c4c9784" },
   "tokyonight.nvim": { "branch": "main", "commit": "5da1b76e64daf4c5d410f06bcb6b9cb640da7dfd" }
diff --git a/lua/config/lazy.lua b/lua/config/lazy.lua
index b24d5d5..bd25982 100644
--- a/lua/config/lazy.lua
+++ b/lua/config/lazy.lua
@@ -19,6 +19,7 @@ vim.opt.rtp:prepend(lazypath)
 -- Initialize lazy.nvim
 local plugins = {
   require("plugins.colorschemes"),  -- theme
+  require("plugins.lsp"),           -- LSP
   require("plugins.telescope"),     -- fuzzy finder
   require("plugins.treesitter"),    -- syntax tree
 }
diff --git a/lua/plugins/lsp.lua b/lua/plugins/lsp.lua
new file mode 100644
index 0000000..9d494ab
--- /dev/null
+++ b/lua/plugins/lsp.lua
@@ -0,0 +1,114 @@
+return {
+  -- LSP installer
+  { "williamboman/mason.nvim", config = true },
+  { "williamboman/mason-lspconfig.nvim", config = true },
+
+  -- LSP configuration
+  {
+    "neovim/nvim-lspconfig",
+    config = function()
+      -- Initialize Mason
+      require("mason").setup()
+      require("mason-lspconfig").setup()
+
+      -- Lua for vim
+      vim.lsp.config("lua_ls", {
+        settings = {
+          Lua = {
+            diagnostics = {
+              globals = { "vim" }, -- recognize 'vim' as a global
+            },
+            workspace = {
+              library = vim.api.nvim_get_runtime_file("", true), -- includes Neovim runtime files
+              checkThirdParty = false, -- optional, avoids prompts about unknown libraries
+            },
+            telemetry = { enable = false }, -- optional, disable telemetry
+          },
+        },
+      })
+      vim.lsp.enable("lua_ls")
+
+      -- C/C++
+      vim.lsp.config("clangd", {})
+      vim.lsp.enable("clangd")
+
+      -- Rust
+      vim.lsp.config("rust_analyzer", {})
+      vim.lsp.enable("rust_analyzer")
+
+      -- Floating diagnostic on hover
+      vim.api.nvim_create_autocmd("CursorHold", {
+        callback = function()
+          vim.diagnostic.open_float(nil, { focusable = false })
+        end,
+      })
+
+      -- Enable virtual text and signs
+      vim.diagnostic.config({
+        virtual_text = false,
+        signs = true,
+        underline = true,
+        update_in_insert = false,
+        severity_sort = true,
+      })
+
+
+      -- Optional: add keymaps
+      local keymap = vim.keymap
+      keymap.set("n", "gd", vim.lsp.buf.definition, { desc = "Go to definition" })
+      keymap.set("n", "K", vim.lsp.buf.hover, { desc = "Hover documentation" })
+      keymap.set("n", "gr", vim.lsp.buf.references, { desc = "References" })
+    end,
+  },
+
+  -- Completion
+  {
+    "hrsh7th/nvim-cmp",
+    dependencies = {
+      "hrsh7th/cmp-nvim-lsp",
+      "L3MON4D3/LuaSnip",
+    },
+    config = function()
+      local cmp = require("cmp")
+      cmp.setup({
+        snippet = {
+          expand = function(args)
+            require("luasnip").lsp_expand(args.body)
+          end,
+        },
+        mapping = cmp.mapping.preset.insert({
+          ["<C-n>"] = cmp.mapping.select_next_item(),
+          ["<C-p>"] = cmp.mapping.select_prev_item(),
+          ["<CR>"] = cmp.mapping.confirm({ select = true }),
+        }),
+        sources = cmp.config.sources({
+          { name = "nvim_lsp" },
+          { name = "buffer" },
+        }),
+      })
+    end,
+  },
+  {
+    "hrsh7th/nvim-cmp",
+    dependencies = { "hrsh7th/cmp-nvim-lsp", "L3MON4D3/LuaSnip" },
+    config = function()
+      local cmp = require("cmp")
+      cmp.setup({
+        snippet = {
+          expand = function(args)
+            require("luasnip").lsp_expand(args.body)
+          end,
+        },
+        mapping = cmp.mapping.preset.insert({
+          ["<C-n>"] = cmp.mapping.select_next_item(),
+          ["<C-p>"] = cmp.mapping.select_prev_item(),
+          ["<CR>"] = cmp.mapping.confirm({ select = true }),
+        }),
+        sources = cmp.config.sources({
+          { name = "nvim_lsp" },
+          { name = "buffer" },
+        }),
+      })
+    end,
+  },
+}