Create formatter.lua

lua/lazy/plugins/formatter.lua

@@ -0,0 +1,64 @@
+return {
+	"stevearc/conform.nvim",
+	dependencies = {
+		"williamboman/mason.nvim",
+	},
+	event = { "BufWritePre" },
+	-- Customize or remove this keymap to your liking
+	keys = {
+		{
+			"<leader>f",
+			function()
+				require("conform").format({ async = true })
+			end,
+			mode = "",
+			desc = "格式化代码",
+		},
+	},
+	opts = {
+		formatters_by_ft = {
+			lua = { "stylua" },
+			python = { "isort", "black" },
+			rust = { "rustfmt", lsp_format = "fallback" },
+		},
+	},
+	config = function(_, opts)
+		-- 初始化 mason.nvim
+		require("mason").setup()
+
+		-- 辅助函数：从 formatters_by_ft 中提取所有工具名称（去重）
+		local function get_ensure_installed(ft_table)
+			local tools = {}
+			for _, cfg in pairs(ft_table) do
+				if type(cfg) == "table" then
+					for _, item in ipairs(cfg) do
+						if type(item) == "string" then
+							tools[item] = true
+						end
+					end
+				elseif type(cfg) == "string" then
+					tools[cfg] = true
+				end
+			end
+			local list = {}
+			for tool, _ in pairs(tools) do
+				table.insert(list, tool)
+			end
+			return list
+		end
+
+		local ensure_installed = get_ensure_installed(opts.formatters_by_ft)
+
+		-- 利用 mason 的注册中心自动安装缺失的工具
+		local registry = require("mason-registry")
+		for _, tool in ipairs(ensure_installed) do
+			if not registry.is_installed(tool) then
+				vim.notify("Installing formatter: " .. tool, vim.log.levels.INFO)
+				registry.get_package(tool):install()
+			end
+		end
+
+		-- 最后调用 conform.nvim 的 setup，使用传入的 opts
+		require("conform").setup(opts)
+	end,
+}