#!/usr/bin/python
# Copyright 2006-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

from __future__ import print_function

import platform
import signal
import sys

# This block ensures that ^C interrupts are handled quietly. We handle
# KeyboardInterrupt instead of installing a SIGINT handler, since
# exiting from signal handlers intermittently causes python to ignore
# the SystemExit exception with a message like this:
# Exception SystemExit: 130 in <function remove at 0x7fd2146c1320> ignored
try:

	def exithandler(signum,frame):
		signal.signal(signal.SIGTERM, signal.SIG_IGN)
		sys.exit(128 + signum)

	signal.signal(signal.SIGTERM, exithandler)
	# Prevent "[Errno 32] Broken pipe" exceptions when
	# writing to a pipe.
	signal.signal(signal.SIGPIPE, signal.SIG_DFL)

	def debug_signal(signum, frame):
		import pdb
		pdb.set_trace()

	if platform.python_implementation() == 'Jython':
		debug_signum = signal.SIGUSR2 # bug #424259
	else:
		debug_signum = signal.SIGUSR1

	signal.signal(debug_signum, debug_signal)

	from os import path as osp
	pym_path = osp.join(osp.dirname(osp.dirname(
		osp.realpath(__file__))), "pym")
	sys.path.insert(0, pym_path)
	import portage
	portage._internal_caller = True
	portage._disable_legacy_globals()
	from _emerge.main import emerge_main

	if __name__ == "__main__":
		import sys
		from portage.exception import ParseError, PermissionDenied
		try:
			retval = emerge_main()
		except PermissionDenied as e:
			sys.stderr.write("Permission denied: '%s'\n" % str(e))
			sys.exit(e.errno)
		except ParseError as e:
			sys.stderr.write("%s\n" % str(e))
			sys.exit(1)
		except (KeyboardInterrupt, SystemExit):
			raise
		except Exception:
			# If an unexpected exception occurs then we don't want the
			# mod_echo output to obscure the traceback, so dump the
			# mod_echo output before showing the traceback.
			import traceback
			tb_str = traceback.format_exc()
			try:
				from portage.elog import mod_echo
			except ImportError:
				pass
			else:
				mod_echo.finalize()
			sys.stderr.write(tb_str)
			sys.exit(1)
		sys.exit(retval)

except KeyboardInterrupt:
	sys.stderr.write("\n\nExiting on signal %(signal)s\n" %
		{"signal": signal.SIGINT})
	sys.stderr.flush()
	sys.exit(128 + signal.SIGINT)