small refactor to lsp.lua (lsp/setup.lua), rename lsp/language_servers

-> lsp/servers. utils now has a function for "get_file_names_in_dir"

home/.config/nvim/lua/lsp/servers/clangd.lua

@@ -0,0 +1,62 @@
+local utils = require("utils")
+
+-- https://clangd.llvm.org/extensions.html#switch-between-sourceheader
+local function switch_source_header(bufnr)
+    bufnr = utils.validate_bufnr(bufnr)
+    local clangd_client = vim.lsp.get_clients({ bufnr = bufnr, name = "clangd" })[1]
+    local params = { uri = vim.uri_from_bufnr(bufnr) }
+    if clangd_client then
+        clangd_client.request("textDocument/switchSourceHeader", params, function(err, result)
+            if err then
+                error(tostring(err))
+            end
+            if not result then
+                print "Corresponding file cannot be determined"
+                return
+            end
+            vim.api.nvim_command("drop " .. vim.uri_to_fname(result))
+        end, bufnr)
+    else
+        print "method textDocument/switchSourceHeader is not supported by any servers active on the current buffer"
+    end
+end
+
+return {
+    cmd = {
+        "clangd",
+        "--background-index",         -- Enables background indexing
+        "--clang-tidy",               -- Enables clang-tidy diagnostics
+        "--completion-style=bundled", -- Simpler completions for faster performance
+        "--rename-file-limit=0",      -- No limit on renaming files
+        "--header-insertion=iwyu",    -- Suggest missing includes based on IWYU
+        "--inlay-hints",              -- Enable inlay hints for parameter and type information
+        "--limit-results=70",         -- Limit autocompletion and symbol results
+        "--suggest-missing-includes", -- Still show missing includes suggestions
+        "--pch-storage=disk",         -- Stores precompiled headers on disk (fixes the issue where system ran out of memory when indexing large projects, not a huge performance hit on fast m2 ssds)
+        "--log=error",                -- Log only errors
+    },
+    filetypes = { "c", "cpp", "objc", "objcpp", "cuda", "proto" },
+    root_markers = {
+        ".clangd",
+        ".clang-tidy",
+        ".clang-format",
+        "compile_commands.json",
+        "compile_flags.txt",
+        "configure.ac",
+    },
+    on_attach = function(_, bufnr)
+        local lsp_maps = {
+            {
+                "<leader>ko",
+                function() switch_source_header(0) end,
+            },
+        }
+
+        local keymaps = { n = {} }
+        for i, _ in ipairs(lsp_maps) do
+            local binding, cmd = unpack(lsp_maps[i])
+            keymaps.n[binding] = { cmd = cmd, opts = { buffer = bufnr } }
+        end
+        utils.add_keymaps(keymaps)
+    end,
+}

home/.config/nvim/lua/lsp/servers/cmake.lua

@@ -0,0 +1,14 @@
+return {
+    cmd = { "cmake-language-server" },
+    filetypes = { "cmake" },
+    root_markers = {
+        "CMakeLists.txt",
+        "CMakePresets.json",
+        "CTestConfig.cmake",
+        "build",
+        "cmake",
+    },
+    init_options = {
+        buildDirectory = "build",
+    },
+}

home/.config/nvim/lua/lsp/servers/gopls.lua

@@ -0,0 +1,56 @@
+local mod_cache = nil
+
+return {
+    cmd = { "gopls" },
+    filetypes = { "go", "gomod", "gowork", "gotmpl" },
+    settings = {
+        gopls = {
+            ["ui.inlayhints.hints"] = {
+                compositeLiteralFields = true,
+                constantValues = true,
+                parameterNames = true,
+            },
+            analyses = {
+                unusedparams = true,
+            },
+            staticcheck = true,
+            lintTool = "golangci-lint",
+        },
+    },
+    root_dir = function(callback)
+        local path = vim.fn.expand("%:p")
+        if not path or path == "" then
+            callback(nil)
+            return
+        end
+
+        -- Asynchronously fetch GOMODCACHE if not already set
+        if not mod_cache then
+            vim.system({ "go", "env", "GOMODCACHE" }, { text = true }, function(result)
+                if result and result.code == 0 and result.stdout then
+                    mod_cache = vim.trim(result.stdout)
+                else
+                    vim.notify("[gopls] Unable to fetch GOMODCACHE", vim.log.levels.WARN)
+                    mod_cache = nil
+                end
+            end)
+        end
+
+        -- Check if the file is in the module cache
+        if mod_cache and path:sub(1, #mod_cache) == mod_cache then
+            local clients = vim.lsp.get_clients({ name = "gopls" })
+            if #clients > 0 then
+                callback(clients[#clients].config.root_dir)
+                return
+            end
+        end
+
+        -- Fallback: Find project root markers
+        local go_mod_root = vim.fs.find({ "go.work", "go.mod", ".git" }, { upward = true, path = path })[1]
+        if go_mod_root then
+            callback(vim.fs.dirname(go_mod_root))
+        else
+            callback(nil)
+        end
+    end,
+}

home/.config/nvim/lua/lsp/servers/lua_ls.lua

@@ -0,0 +1,39 @@
+return {
+    cmd = { "lua-language-server" },
+    filetypes = { "lua" },
+    root_markers = {
+        ".luarc.json",
+        ".luarc.jsonc",
+        ".luacheckrc",
+        ".stylua.toml",
+        "stylua.toml",
+        "selene.toml",
+        "selene.yml",
+        ".git"
+    },
+    on_init = function(client)
+        local path = vim.tbl_get(client, "workspace_folders", 1, "name")
+        if not path then
+            return
+        end
+
+        -- override the lua-language-server settings for Neovim config
+        client.settings = vim.tbl_deep_extend("force", client.settings, {
+            Lua = {
+                runtime = {
+                    version = "LuaJIT"
+                },
+                -- Make the server aware of Neovim runtime files
+                workspace = {
+                    checkThirdParty = false,
+                    library = {
+                        vim.env.VIMRUNTIME
+                        -- Depending on the usage, you might want to add additional paths here.
+                        -- "${3rd}/luv/library"
+                        -- "${3rd}/busted/library",
+                    }
+                }
+            }
+        })
+    end
+}