nvim: Intelligent format on save

nvim/.config/nvim/lua/lazy-plugins/lsp-conform.lua

@@ -6,7 +6,35 @@ return {
 
 		conform.setup(opts)
 
-		vim.keymap.set({ "n", "v" }, "<leader>cp", function()
+		vim.api.nvim_create_user_command("FormatDisable", function(args)
+			if args.bang then
+				vim.b.disable_autoformat = true
+			else
+				vim.g.disable_autoformat = true
+			end
+		end, {
+			desc = "Disable autoformat-on-save (! = current buffer only)",
+			bang = true,
+		})
+
+		vim.api.nvim_create_user_command("FormatEnable", function()
+			vim.b.disable_autoformat = false
+			vim.g.disable_autoformat = false
+		end, { desc = "Re-enable autoformat-on-save" })
+
+		vim.keymap.set("n", "<leader>cf", "<cmd>FormatDisable!<cr>", {
+			desc = "Format: disable autoformat for this buffer",
+		})
+
+		vim.keymap.set("n", "<leader>cF", "<cmd>FormatDisable<cr>", {
+			desc = "Format: disable autoformat globally (session)",
+		})
+
+		vim.keymap.set("n", "<leader>ce", "<cmd>FormatEnable<cr>", {
+			desc = "Format: re-enable autoformat",
+		})
+
+		vim.keymap.set("n", "<leader>cw", function()
 			conform.format({
 				lsp_fallback = true,
 				async = false,
@@ -32,5 +60,21 @@ return {
 			typescript = { "prettier" },
 			yaml = { "prettier" },
 		},
+		format_on_save = function(bufnr)
+			if vim.g.disable_autoformat or vim.b[bufnr].disable_autoformat then
+				return
+			end
+			local fname = vim.api.nvim_buf_get_name(bufnr)
+			if fname ~= "" then
+				local marker = vim.fs.find(".no-autoformat", {
+					upward = true,
+					path = vim.fs.dirname(fname),
+				})[1]
+				if marker then
+					return
+				end
+			end
+			return { timeout_ms = 2000, lsp_fallback = true }
+		end,
 	},
 }