feat(plugins): auto-formatting with conform.nvim

lua/dot/init.lua

@@ -94,6 +94,13 @@ vim.api.nvim_create_autocmd("TextYankPost", {
 	end,
 })
 
+vim.api.nvim_create_autocmd("BufWritePre", {
+	pattern = "*",
+	callback = function(e)
+		require("conform").format({ bufnr = e.buf })
+	end,
+})
+
 vim.api.nvim_create_autocmd("LspAttach", {
 	group = vim.api.nvim_create_augroup("dot-lsp-attach-autocmds", { clear = true }),
 	callback = function(e)

lua/dot/plugins.lua

@@ -20,6 +20,119 @@ lze.load({
 	},
 	{ "lazydev.nvim", on_require = "lazydev" },
 	{ import = "dot.lsp" },
+
+	-- Formatting
+	{
+		"conform.nvim",
+		after = function()
+			local function js_fmt(bufnr)
+				local f = {}
+
+				if require("conform").get_formatter_info("prettierd", bufnr).available then
+					table.insert(f, "prettierd")
+				elseif require("conform").get_formatter_info("prettier", bufnr).available then
+					table.insert(f, "prettier")
+				end
+
+				if require("conform").get_formatter_info("eslint_d", bufnr).available then
+					table.insert(f, "eslint_d")
+				end
+
+				if
+					require("conform").get_formatter_info("deno_fmt", bufnr).available
+					and (
+						require("dot013.utils").is_in_cwd("deno.json")
+						or require("dot013.utils").is_in_cwd("deno.jsonc")
+					)
+				then
+					table.insert(f, "deno_fmt")
+				end
+
+				return f
+			end
+			require("conform").setup({
+				formatters_by_ft = {
+					-- Simple formatters
+					lua = { "stylua" },
+					nix = { "alejandra", stop_after_first = true },
+					rust = { "rustfmt", lsp_format = "fallback" },
+					sh = { "shellharden", "shfmt" },
+					xml = { "xmllint", "xmltidy" },
+					xhtml = { "xmllint", "xmltidy" },
+					markdown = { "mdfmt" },
+
+					html = { "prettierd", "prettier", stop_after_first = true },
+					css = { "prettierd", "prettier", stop_after_first = true },
+					scss = { "prettierd", "prettier", stop_after_first = true },
+					less = { "prettierd", "prettier", stop_after_first = true },
+					yaml = { "prettierd", "prettier", stop_after_first = true },
+
+					gdscript = { "gdformat" },
+					-- Golang's formatters used by priority
+					go = function(bufnr)
+						local f = {}
+
+						if require("conform").get_formatter_info("gofumpt", bufnr).available then
+							table.insert(f, "gofumpt")
+						else
+							table.insert(f, "gofmt")
+						end
+
+						if require("conform").get_formatter_info("golines", bufnr).available then
+							table.insert(f, "golines")
+						elseif require("conform").get_formatter_info("goimports", bufnr).available then
+							table.insert(f, "goimports")
+						end
+
+						return f
+					end,
+					templ = { "templ" },
+
+					-- JavaScript's ecosystem
+					javascript = js_fmt,
+					javascriptreact = js_fmt,
+					typescript = js_fmt,
+					typescriptreact = js_fmt,
+					json = function(bufnr)
+						local fmts = js_fmt(bufnr)
+						if fmts then
+							return fmts
+						end
+						return { "jq" }
+					end,
+
+					-- Fallback for any filetype
+					["*"] = { "codespell" },
+					["_"] = { "trim_whitespace" },
+				},
+				format_on_save = {
+					timeout_ms = 500,
+					lsp_format = "fallback",
+				},
+				formatters = {
+					mdfmt = {
+						command = "mdfmt",
+					},
+					xmltidy = {
+						inherit = false,
+						-- Uses HTML Tidy
+						command = "tidy",
+						args = { "-xml", "-indent", "yes", "2", "-wrap", "100", "-" },
+					},
+					--[[ nixcmdfmt = {
+						inherit = false,
+						stdin = false,
+						cwd = require("conform.util").root_file({ "flake.nix" }),
+						require_cwd = true,
+						command = "nix",
+						args = { "fmt", "$FILENAME" },
+					}, ]]
+				},
+			})
+		end,
+		on_require = "conform",
+	},
+
 	-- Fuzzy Finding
 	{
 		"telescope.nvim",