This function calls `uncrustify -q -c ~/.textadept/crust.cfg` on your current code. To install uncrustify (there is a Debian/Ubuntu package) [http://uncrustify.sourceforge.net/](http://uncrustify.sourceforge.net/) function indent_cpp() -- written by JB Mouret -- mouret@isir.upmc.fr local buffer = buffer -- unindent the current line (to make empty lines empty) local line = buffer.line_from_position(buffer.current_pos) local indent = buffer.line_indentation[line]; local start_pos = buffer.line_end_position[line - 1] + 1 local s = math.max(start_pos, buffer.current_pos - indent) for i=1,10 do buffer.back_tab() end local line_length = buffer.line_length(line) local empty_line = (line_length == 1) if (empty_line) then buffer.add_text(';') end local input = buffer:get_text() local tmpfile = _USERHOME..'/.ft' local conf = _USERHOME..'/crust.cfg' local f = io.open(tmpfile, 'wb') f:write(input) f:close() local cmd = table.concat({"uncrustify -q -c ", conf, ' -f "'..tmpfile..'"'}, ' ') local p = io.popen(cmd) local fv2 = buffer.first_visible_line buffer:set_text(p:read('*all')) buffer:line_scroll(0, fv2); s = s + buffer.line_indentation[buffer.line_from_position(s)] buffer:goto_pos(s) if (empty_line) then buffer:line_end() buffer:delete_back(); end os.remove(tmpfile) end To bind this function to "tab" (as emacs does it): if not _G.keys.cpp then _G.keys.cpp = {} end _G.keys.cpp['\t'] = indent_cpp

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