conform.lua

local M = {
	'stevearc/conform.nvim',

	config = function(config)
		require('conform').setup(config.conform)
	end,
}

M.defaultConfig = { 'conform', {
	-- Map of filetype to formatters
	formatters_by_ft = {
		-- lua = { 'stylua' },
		-- Conform will run multiple formatters sequentially
		go = { 'goimports', 'gofmt' },
		-- You can also customize some of the format options for the filetype
		rust = { 'rustfmt', lsp_format = 'fallback' },
		-- You can use a function here to determine the formatters dynamically
		python = function(bufnr)
			if require('conform').get_formatter_info('ruff_format', bufnr).available then
				return { 'ruff_format' }
			else
				return { 'isort', 'black' }
			end
		end,
		javascript = { 'eslintd', 'prettierd' },
		-- Use the "*" filetype to run formatters on all filetypes.
		['*'] = { 'codespell' },
		-- Use the "_" filetype to run formatters on filetypes that don't
		-- have other formatters configured.
		['_'] = { 'trim_whitespace' },
	},
	-- Set this to change the default values when calling conform.format()
	-- This will also affect the default values for format_on_save/format_after_save
	default_format_opts = {
		lsp_format = 'last',
	},
	-- If this is set, Conform will run the formatter on save.
	-- It will pass the table to conform.format().
	-- This can also be a function that returns the table.
	format_on_save = {
		-- lsp_format = 'last',
		timeout_ms = 500,
	},
	-- If this is set, Conform will run the formatter asynchronously after save.
	-- It will pass the table to conform.format().
	-- This can also be a function that returns the table.
	-- format_after_save = {
	-- 	lsp_format = 'last',
	-- },
	-- Set the log level. Use `:ConformInfo` to see the location of the log file.
	log_level = vim.log.levels.ERROR,
	-- Conform will notify you when a formatter errors
	notify_on_error = true,
	-- Conform will notify you when no formatters are available for the buffer
	notify_no_formatters = true,
	-- Custom formatters and overrides for built-in formatters
	formatters = {
		-- my_formatter = {
		-- 	-- This can be a string or a function that returns a string.
		-- 	-- When defining a new formatter, this is the only field that is required
		-- 	command = 'my_cmd',
		-- 	-- A list of strings, or a function that returns a list of strings
		-- 	-- Return a single string instead of a list to run the command in a shell
		-- 	args = { '--stdin-from-filename', '$FILENAME' },
		-- 	-- If the formatter supports range formatting, create the range arguments here
		-- 	range_args = function(self, ctx)
		-- 		return { '--line-start', ctx.range.start[1], '--line-end', ctx.range['end'][1] }
		-- 	end,
		-- 	-- Send file contents to stdin, read new contents from stdout (default true)
		-- 	-- When false, will create a temp file (will appear in "$FILENAME" args). The temp
		-- 	-- file is assumed to be modified in-place by the format command.
		-- 	stdin = true,
		-- 	-- A function that calculates the directory to run the command in
		-- 	cwd = require('conform.util').root_file({ '.editorconfig', 'package.json' }),
		-- 	-- When cwd is not found, don't run the formatter (default false)
		-- 	require_cwd = true,
		-- 	-- When stdin=false, use this template to generate the temporary file that gets formatted
		-- 	tmpfile_format = '.conform.$RANDOM.$FILENAME',
		-- 	-- When returns false, the formatter will not be used
		-- 	condition = function(self, ctx)
		-- 		return vim.fs.basename(ctx.filename) ~= 'README.md'
		-- 	end,
		-- 	-- Exit codes that indicate success (default { 0 })
		-- 	exit_codes = { 0, 1 },
		-- 	-- Environment variables. This can also be a function that returns a table.
		-- 	env = {
		-- 		VAR = 'value',
		-- 	},
		-- 	-- Set to false to disable merging the config with the base definition
		-- 	inherit = true,
		-- 	-- When inherit = true, add these additional arguments to the beginning of the command.
		-- 	-- This can also be a function, like args
		-- 	prepend_args = { '--use-tabs' },
		-- 	-- When inherit = true, add these additional arguments to the end of the command.
		-- 	-- This can also be a function, like args
		-- 	append_args = { '--trailing-comma' },
		-- },
		-- -- These can also be a function that returns the formatter
		-- other_formatter = function(bufnr)
		-- 	return {
		-- 		command = 'my_cmd',
		-- 	}
		-- end,
	},
} }

local function format()
	require('conform').format({ async = true, lsp_fallback = true }, function(err)
		if not err then
			-- If we formatted in visual mode, escape to normal mode after formatting
			if vim.startswith(vim.api.nvim_get_mode().mode:lower(), 'v') then
				vim.api.nvim_feedkeys(vim.api.nvim_replace_termcodes('<Esc>', true, false, true), 'n', true)
			end
		end
	end)
end

M.keymaps = {
	{
		'n', '=', format, { desc = 'Format a buffer using the attached language server clients. (Format will be trigger when write buffer to disk)' },
		'v', '=', format, { desc = 'Range format selected text using the attached language server clients.' },
	},

}

return M