# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

from _emerge.AsynchronousTask import AsynchronousTask
from portage.util import writemsg
import sys
import portage
from portage import os
from portage import _encodings
from portage import _unicode_decode
from portage.package.ebuild.fetch import _checksum_failure_temp_file

class BinpkgVerifier(AsynchronousTask):
	__slots__ = ("logfile", "pkg", "scheduler")

	def _start(self):
		"""
		Note: Unlike a normal AsynchronousTask.start() method,
		this one does all work is synchronously. The returncode
		attribute will be set before it returns.
		"""

		pkg = self.pkg
		root_config = pkg.root_config
		bintree = root_config.trees["bintree"]
		rval = os.EX_OK
		stdout_orig = sys.stdout
		stderr_orig = sys.stderr
		out = portage.StringIO()
		file_exists = True
		try:
			sys.stdout = out
			sys.stderr = out
			try:
				bintree.digestCheck(pkg)
			except portage.exception.FileNotFound:
				writemsg("!!! Fetching Binary failed " + \
					"for '%s'\n" % pkg.cpv, noiselevel=-1)
				rval = 1
				file_exists = False
			except portage.exception.DigestException as e:
				writemsg("\n!!! Digest verification failed:\n",
					noiselevel=-1)
				writemsg("!!! %s\n" % e.value[0],
					noiselevel=-1)
				writemsg("!!! Reason: %s\n" % e.value[1],
					noiselevel=-1)
				writemsg("!!! Got: %s\n" % e.value[2],
					noiselevel=-1)
				writemsg("!!! Expected: %s\n" % e.value[3],
					noiselevel=-1)
				rval = 1
			if rval == os.EX_OK:
				pass
			elif file_exists:
				pkg_path = bintree.getname(pkg.cpv)
				head, tail = os.path.split(pkg_path)
				temp_filename = _checksum_failure_temp_file(head, tail)
				writemsg("File renamed to '%s'\n" % (temp_filename,),
					noiselevel=-1)
		finally:
			sys.stdout = stdout_orig
			sys.stderr = stderr_orig

		msg = _unicode_decode(out.getvalue(),
			encoding=_encodings['content'], errors='replace')
		if msg:
			self.scheduler.output(msg, log_path=self.logfile,
				background=self.background)

		self.returncode = rval
		self.wait()