Perforce Plugin for Sublime Text. In ST3 this goes directly in the Packages directory.

Default (Linux).sublime-keymap

[
	{ "keys": ["f8"], "command": "p4_edit" }
]

perforce.py

import sublime, sublime_plugin, os, subprocess

class P4EditCommand(sublime_plugin.TextCommand):
	def run(self, edit):
		if self.view.file_name():
			folder_name, file_name = os.path.split(self.view.file_name())

		command = 'export P4CONFIG=.perforce; p4 edit '+file_name

		p = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, cwd=folder_name, shell=True)
		result, err = p.communicate()

		self.view.set_status('p4',result+err)
		sublime.set_timeout(self.clear,2000)

	def clear(self):
		self.view.erase_status('p4')