在输入快捷键格式化时触发检测是否安装格式化工具

lua/lazy/plugins/formatter.lua

@@ -3,42 +3,31 @@ return {
 	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" },
+			rust = { "rust-analyzer", lsp_format = "fallback" },
+			toml = { "templ" },
 		},
 	},
 	config = function(_, opts)
-		-- 初始化 mason.nvim
+		-- 初始化 mason.nvim 和 conform.nvim
 		require("mason").setup()
+		require("conform").setup(opts)
 
-		-- 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)
+		-- 辅助函数：从指定文件类型的配置中提取所有工具名称（去重）
+		local function get_ensure_installed_for_ft(ft, 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
+			local cfg = ft_table[ft]
+			if type(cfg) == "table" then
+				for _, item in ipairs(cfg) do
+					if type(item) == "string" then
+						tools[item] = true
 					end
-				elseif type(cfg) == "string" then
-					tools[cfg] = true
 				end
+			elseif type(cfg) == "string" then
+				tools[cfg] = true
 			end
 			local list = {}
 			for tool, _ in pairs(tools) do
@@ -47,18 +36,18 @@ return {
 			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()
+		-- 设置 <leader>f 键映射，在按下时自动检测并安装缺失的工具后格式化代码
+		vim.keymap.set({ "n", "v" }, "<leader>f", function()
+			local ft = vim.bo.filetype
+			local tools = get_ensure_installed_for_ft(ft, opts.formatters_by_ft)
+			local registry = require("mason-registry")
+			for _, tool in ipairs(tools) do
+				if not registry.is_installed(tool) then
+					vim.notify("Installing formatter: " .. tool, vim.log.levels.INFO)
+					registry.get_package(tool):install()
+				end
 			end
-		end
-
-		-- 最后调用 conform.nvim 的 setup，使用传入的 opts
-		require("conform").setup(opts)
+			require("conform").format({ async = true, lsp_fallback = true })
+		end, { desc = "格式化代码（检测安装缺失工具）" })
 	end,
 }