Add folder that contains current file to sidebar, for Sublime Text. Goes well with Cmd+.,Cmd+O of GoSublime until https://github.com/DisposaBoy/GoSublime/issues/553 is resolved.

README.md

File paths for Sublime Text 3 on OS X:

• ~/Library/Application Support/Sublime Text 3/Packages/User/add_to_project.py
• ~/Library/Application Support/Sublime Text 3/Packages/User/Default (OSX).sublime-keymap

Credit to https://www.sublimetext.com/forum/viewtopic.php?f=6&t=13021 for relevant resources I used to put this together.

add_to_project.py

import sublime
import sublime_plugin
import os.path

# Add folder that contains current file to sidebar.
class AddToProjectCommand(sublime_plugin.WindowCommand):
	def run(self):
		path = sublime.active_window().active_view().file_name()
		if path == None:
			return
		path = os.path.dirname(path)

		# TODO: Try to see if it's possible to preserve expanded folders when adding a new folder.
		#wat = sublime.active_window().active_view().settings().has("expanded_folders")
		#if wat:
		#	sublime.message_dialog("true")
		#else:
		#	sublime.message_dialog("false")

		data = sublime.active_window().project_data()
		if data:
			for folder in data['folders']:
				if folder['path'] == path:
					return
			data['folders'].append({'follow_symlinks': True, 'path': path})
		else:
			data = {'folders': [{'follow_symlinks': True, 'path': path}]}
		sublime.active_window().set_project_data(data)

Default (OSX).sublime-keymap

[
	// ... (existing content)

	// Add folder that contains current file to sidebar.
	{ "keys": ["f3"], "command": "add_to_project" },

	// ...
]