A simple plugin which assures that opening the same file with paths containing symlinks will not be treated as different files

open_file_detect_symlinks.py

import sublime
import sublime_plugin

import os.path

import logging
logger = logging.getLogger(__name__)


# Maintains a list of the currently open files.
# It is more efficient to update it live than to create it from scratch per
# each trigger of `on_load` event 
open_files_paths = []


def plugin_loaded():
    global open_files_paths
    open_files_paths = [
        view.file_name()
        for view in sublime.active_window().views()
        if view.file_name()]
    logger.debug("Obtained list of opened files: {}".format(open_files_paths))


class OpenedFilesListener(sublime_plugin.EventListener):
    def on_load(self, view):
        open_files_paths.append(view.file_name())
        logger.debug(
            "Adding opened file to list of opened files: {}".format(
                view.file_name()))

        # Check whether someone is trying to open an already opened file from
        # a different path (this logic seems missing from SublimeText)
        for opened_file_path in open_files_paths:
            if (view.file_name() != opened_file_path and
                    os.path.samefile(view.file_name(), opened_file_path)):
                logger.debug("Closed path:  \"{}\"".format(view.file_name()))
                logger.debug("Focused path: \"{}\"".format(opened_file_path))
                opened_file_path_view = (
                    sublime.active_window().find_open_file(opened_file_path))
                view.close()
                sublime.active_window().focus_view(opened_file_path_view)
                break

    def on_close(self, view):
        open_files_paths.remove(view.file_name())
        logger.debug(
            "Removing closed file from list of opened files: {}".format(
                view.file_name()))