Detect tab or space indent for Sublime text

detect_indent.py

import sublime, sublime_plugin, re


class ExampleCommand(sublime_plugin.EventListener):
        
    def on_activated(self, view):
        self.on_load(view)
        
    
    def on_load(self, view):
        settings = view.settings()
        if settings.get("indent_detected"):
            return
        settings.set("indent_detected", True)
        start = 0
        for i in range(10): # Probably not a code if no indent in first 10k
            buff = (view.substr(sublime.Region(start, start+1024)))
            match = re.search("^(    |\t).*", buff, re.M)
            if match:
                tab_indented = match.group(1) == "\t"
                print("Tab indeneted:", tab_indented, repr(match.group(1)))
                if tab_indented:
                    settings.set('translate_tabs_to_spaces', False)
                else:
                    settings.set('translate_tabs_to_spaces', True)
                break
            if not buff:
                break
            start += 1024