[gentoo-commits] portage r13719 - main/branches/prefix/pym/_emerge

[Fabian Groffen (grobian)]

Author: grobian
Date: 2009-06-28 13:36:35 +0000 (Sun, 28 Jun 2009)
New Revision: 13719

Added:
   main/branches/prefix/pym/_emerge/main.py
Removed:
   main/branches/prefix/pym/_emerge/__init__.py
Log:
manually replay r13697 and pray that nothing was changed in the file at the same time

Deleted: main/branches/prefix/pym/_emerge/__init__.py
===================================================================
--- main/branches/prefix/pym/_emerge/__init__.py	2009-06-28 13:10:08 UTC (rev 13718)
+++ main/branches/prefix/pym/_emerge/__init__.py	2009-06-28 13:36:35 UTC (rev 13719)
@@ -1,1295 +0,0 @@
-# Copyright 1999-2009 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-# $Id$
-
-import logging
-import shlex
-import signal
-import sys
-import textwrap
-import os
-import platform
-
-# Portage module path logic (Prefix way)
-# In principle we don't want to be dependant on the environment
-# (PYTHONPATH) and/or python hardcoded default search path.
-# (PYTHONPATH).  Since Gentoo patches Python to include Portage's python
-# modules in the default search path, any Gentoo python interpreter is
-# an enemy for Portage once it is not installed in the path hardcoded
-# during Python compilation.  This is the case when bootstrapping
-# Prefix Portage on a Gentoo Linux system, or when bootstrapping Prefix
-# Portage using another Prefix instance on the same system.  For this
-# reason we ignore the entire search path, and allow a backdoor for
-# developers via the PORTAGE_PYTHONPATH variable.
-import os
-import sys
-if os.environ.__contains__("PORTAGE_PYTHONPATH"):
-	sys.path.insert(0, os.environ["PORTAGE_PYTHONPATH"])
-else:
-	sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(os.path.realpath(__file__))), "pym"))
-import portage
-
-import _emerge.help
-import portage.xpak, commands, errno, re, time
-from portage.output import colorize, xtermTitleReset
-from portage.output import create_color_func
-good = create_color_func("GOOD")
-bad = create_color_func("BAD")
-
-import portage.elog
-import portage.dep
-portage.dep._dep_check_strict = True
-import portage.util
-import portage.locks
-import portage.exception
-from portage.const import EPREFIX, BPREFIX, EPREFIX_LSTRIP
-from portage.data import secpass
-from portage.util import normalize_path as normpath
-from portage.util import writemsg, writemsg_level
-from portage.sets import SETPREFIX
-
-from _emerge.actions import action_config, action_sync, action_metadata, \
-	action_regen, action_search, action_uninstall, action_info, action_build, \
-	adjust_config, chk_updated_cfg_files, display_missing_pkg_set, \
-	display_news_notification, getportageversion, load_emerge_config
-from _emerge.emergelog import emergelog
-from _emerge._flush_elog_mod_echo import _flush_elog_mod_echo
-from _emerge.is_valid_package_atom import is_valid_package_atom
-from _emerge.stdout_spinner import stdout_spinner
-
-options=[
-"--ask",          "--alphabetical",
-"--buildpkg",     "--buildpkgonly",
-"--changelog",    "--columns",
-"--complete-graph",
-"--debug",        "--deep",
-"--digest",
-"--emptytree",
-"--fetchonly",    "--fetch-all-uri",
-"--getbinpkg",    "--getbinpkgonly",
-"--help",         "--ignore-default-opts",
-"--keep-going",
-"--noconfmem",
-"--newuse",
-"--nodeps",       "--noreplace",
-"--nospinner",    "--oneshot",
-"--onlydeps",     "--pretend",
-"--quiet",        "--resume",
-"--searchdesc",   "--selective",
-"--skipfirst",
-"--tree",
-"--update",
-"--usepkg",       "--usepkgonly",
-"--verbose",
-]
-
-shortmapping={
-"1":"--oneshot",
-"a":"--ask",
-"b":"--buildpkg",  "B":"--buildpkgonly",
-"c":"--clean",     "C":"--unmerge",
-"d":"--debug",     "D":"--deep",
-"e":"--emptytree",
-"f":"--fetchonly", "F":"--fetch-all-uri",
-"g":"--getbinpkg", "G":"--getbinpkgonly",
-"h":"--help",
-"k":"--usepkg",    "K":"--usepkgonly",
-"l":"--changelog",
-"n":"--noreplace", "N":"--newuse",
-"o":"--onlydeps",  "O":"--nodeps",
-"p":"--pretend",   "P":"--prune",
-"q":"--quiet",
-"s":"--search",    "S":"--searchdesc",
-"t":"--tree",
-"u":"--update",
-"v":"--verbose",   "V":"--version"
-}
-
-def chk_updated_info_files(root, infodirs, prev_mtimes, retval):
-
-	if os.path.exists(EPREFIX + "/usr/bin/install-info"):
-		out = portage.output.EOutput()
-		regen_infodirs=[]
-		for z in infodirs:
-			if z=='':
-				continue
-			inforoot=normpath(root+z)
-			if os.path.isdir(inforoot):
-				infomtime = long(os.stat(inforoot).st_mtime)
-				if inforoot not in prev_mtimes or \
-					prev_mtimes[inforoot] != infomtime:
-						regen_infodirs.append(inforoot)
-
-		if not regen_infodirs:
-			portage.writemsg_stdout("\n")
-			out.einfo("GNU info directory index is up-to-date.")
-		else:
-			portage.writemsg_stdout("\n")
-			out.einfo("Regenerating GNU info directory index...")
-
-			dir_extensions = ("", ".gz", ".bz2")
-			icount=0
-			badcount=0
-			errmsg = ""
-			for inforoot in regen_infodirs:
-				if inforoot=='':
-					continue
-
-				if not os.path.isdir(inforoot) or \
-					not os.access(inforoot, os.W_OK):
-					continue
-
-				file_list = os.listdir(inforoot)
-				file_list.sort()
-				dir_file = os.path.join(inforoot, "dir")
-				moved_old_dir = False
-				processed_count = 0
-				for x in file_list:
-					if x.startswith(".") or \
-						os.path.isdir(os.path.join(inforoot, x)):
-						continue
-					if x.startswith("dir"):
-						skip = False
-						for ext in dir_extensions:
-							if x == "dir" + ext or \
-								x == "dir" + ext + ".old":
-								skip = True
-								break
-						if skip:
-							continue
-					if processed_count == 0:
-						for ext in dir_extensions:
-							try:
-								os.rename(dir_file + ext, dir_file + ext + ".old")
-								moved_old_dir = True
-							except EnvironmentError, e:
-								if e.errno != errno.ENOENT:
-									raise
-								del e
-					processed_count += 1
-					myso=commands.getstatusoutput("LANG=C LANGUAGE=C " + EPREFIX + "/usr/bin/install-info --dir-file="+inforoot+"/dir "+inforoot+"/"+x)[1]
-					existsstr="already exists, for file `"
-					if myso!="":
-						if re.search(existsstr,myso):
-							# Already exists... Don't increment the count for this.
-							pass
-						elif myso[:44]=="install-info: warning: no info dir entry in ":
-							# This info file doesn't contain a DIR-header: install-info produces this
-							# (harmless) warning (the --quiet switch doesn't seem to work).
-							# Don't increment the count for this.
-							pass
-						else:
-							badcount=badcount+1
-							errmsg += myso + "\n"
-					icount=icount+1
-
-				if moved_old_dir and not os.path.exists(dir_file):
-					# We didn't generate a new dir file, so put the old file
-					# back where it was originally found.
-					for ext in dir_extensions:
-						try:
-							os.rename(dir_file + ext + ".old", dir_file + ext)
-						except EnvironmentError, e:
-							if e.errno != errno.ENOENT:
-								raise
-							del e
-
-				# Clean dir.old cruft so that they don't prevent
-				# unmerge of otherwise empty directories.
-				for ext in dir_extensions:
-					try:
-						os.unlink(dir_file + ext + ".old")
-					except EnvironmentError, e:
-						if e.errno != errno.ENOENT:
-							raise
-						del e
-
-				#update mtime so we can potentially avoid regenerating.
-				prev_mtimes[inforoot] = long(os.stat(inforoot).st_mtime)
-
-			if badcount:
-				out.eerror("Processed %d info files; %d errors." % \
-					(icount, badcount))
-				writemsg_level(errmsg, level=logging.ERROR, noiselevel=-1)
-			else:
-				if icount > 0:
-					out.einfo("Processed %d info files." % (icount,))
-
-
-def display_preserved_libs(vardbapi):
-	MAX_DISPLAY = 3
-
-	# Ensure the registry is consistent with existing files.
-	vardbapi.plib_registry.pruneNonExisting()
-
-	if vardbapi.plib_registry.hasEntries():
-		print
-		print colorize("WARN", "!!!") + " existing preserved libs:"
-		plibdata = vardbapi.plib_registry.getPreservedLibs()
-		linkmap = vardbapi.linkmap
-		consumer_map = {}
-		owners = {}
-		linkmap_broken = False
-
-		try:
-			linkmap.rebuild()
-		except portage.exception.CommandNotFound, e:
-			writemsg_level("!!! Command Not Found: %s\n" % (e,),
-				level=logging.ERROR, noiselevel=-1)
-			del e
-			linkmap_broken = True
-		else:
-			search_for_owners = set()
-			for cpv in plibdata:
-				internal_plib_keys = set(linkmap._obj_key(f) \
-					for f in plibdata[cpv])
-				for f in plibdata[cpv]:
-					if f in consumer_map:
-						continue
-					consumers = []
-					for c in linkmap.findConsumers(f):
-						# Filter out any consumers that are also preserved libs
-						# belonging to the same package as the provider.
-						if linkmap._obj_key(c) not in internal_plib_keys:
-							consumers.append(c)
-					consumers.sort()
-					consumer_map[f] = consumers
-					search_for_owners.update(consumers[:MAX_DISPLAY+1])
-
-			owners = vardbapi._owners.getFileOwnerMap(search_for_owners)
-
-		for cpv in plibdata:
-			print colorize("WARN", ">>>") + " package: %s" % cpv
-			samefile_map = {}
-			for f in plibdata[cpv]:
-				obj_key = linkmap._obj_key(f)
-				alt_paths = samefile_map.get(obj_key)
-				if alt_paths is None:
-					alt_paths = set()
-					samefile_map[obj_key] = alt_paths
-				alt_paths.add(f)
-
-			for alt_paths in samefile_map.itervalues():
-				alt_paths = sorted(alt_paths)
-				for p in alt_paths:
-					print colorize("WARN", " * ") + " - %s" % (p,)
-				f = alt_paths[0]
-				consumers = consumer_map.get(f, [])
-				for c in consumers[:MAX_DISPLAY]:
-					print colorize("WARN", " * ") + "     used by %s (%s)" % \
-						(c, ", ".join(x.mycpv for x in owners.get(c, [])))
-				if len(consumers) == MAX_DISPLAY + 1:
-					print colorize("WARN", " * ") + "     used by %s (%s)" % \
-						(consumers[MAX_DISPLAY], ", ".join(x.mycpv \
-						for x in owners.get(consumers[MAX_DISPLAY], [])))
-				elif len(consumers) > MAX_DISPLAY:
-					print colorize("WARN", " * ") + "     used by %d other files" % (len(consumers) - MAX_DISPLAY)
-		print "Use " + colorize("GOOD", "emerge @preserved-rebuild") + " to rebuild packages using these libraries"
-
-
-def post_emerge(root_config, myopts, mtimedb, retval):
-	"""
-	Misc. things to run at the end of a merge session.
-	
-	Update Info Files
-	Update Config Files
-	Update News Items
-	Commit mtimeDB
-	Display preserved libs warnings
-	Exit Emerge
-
-	@param trees: A dictionary mapping each ROOT to it's package databases
-	@type trees: dict
-	@param mtimedb: The mtimeDB to store data needed across merge invocations
-	@type mtimedb: MtimeDB class instance
-	@param retval: Emerge's return value
-	@type retval: Int
-	@rype: None
-	@returns:
-	1.  Calls sys.exit(retval)
-	"""
-
-	target_root = root_config.root
-	trees = { target_root : root_config.trees }
-	vardbapi = trees[target_root]["vartree"].dbapi
-	settings = vardbapi.settings
-	info_mtimes = mtimedb["info"]
-
-	# Load the most current variables from ${ROOT}/etc/profile.env
-	settings.unlock()
-	settings.reload()
-	settings.regenerate()
-	settings.lock()
-
-	config_protect = settings.get("CONFIG_PROTECT","").split()
-	infodirs = settings.get("INFOPATH","").split(":") + \
-		settings.get("INFODIR","").split(":")
-
-	os.chdir("/")
-
-	if retval == os.EX_OK:
-		exit_msg = " *** exiting successfully."
-	else:
-		exit_msg = " *** exiting unsuccessfully with status '%s'." % retval
-	emergelog("notitles" not in settings.features, exit_msg)
-
-	_flush_elog_mod_echo()
-
-	counter_hash = settings.get("PORTAGE_COUNTER_HASH")
-	if "--pretend" in myopts or (counter_hash is not None and \
-		counter_hash == vardbapi._counter_hash()):
-		display_news_notification(root_config, myopts)
-		# If vdb state has not changed then there's nothing else to do.
-		sys.exit(retval)
-
-	vdb_path = os.path.join(target_root, portage.VDB_PATH)
-	portage.util.ensure_dirs(vdb_path)
-	vdb_lock = None
-	if os.access(vdb_path, os.W_OK) and not "--pretend" in myopts:
-		vdb_lock = portage.locks.lockdir(vdb_path)
-
-	if vdb_lock:
-		try:
-			if "noinfo" not in settings.features:
-				chk_updated_info_files(target_root + EPREFIX,
-					infodirs, info_mtimes, retval)
-			mtimedb.commit()
-		finally:
-			if vdb_lock:
-				portage.locks.unlockdir(vdb_lock)
-
-	chk_updated_cfg_files(target_root + EPREFIX, config_protect)
-	
-	display_news_notification(root_config, myopts)
-	if retval in (None, os.EX_OK) or (not "--pretend" in myopts):
-		display_preserved_libs(vardbapi)	
-
-	sys.exit(retval)
-
-
-def multiple_actions(action1, action2):
-	sys.stderr.write("\n!!! Multiple actions requested... Please choose one only.\n")
-	sys.stderr.write("!!! '%s' or '%s'\n\n" % (action1, action2))
-	sys.exit(1)
-
-def insert_optional_args(args):
-	"""
-	Parse optional arguments and insert a value if one has
-	not been provided. This is done before feeding the args
-	to the optparse parser since that parser does not support
-	this feature natively.
-	"""
-
-	new_args = []
-	jobs_opts = ("-j", "--jobs")
-	default_arg_opts = {
-		'--deselect'   : ('n',),
-		'--root-deps'  : ('rdeps',),
-	}
-	arg_stack = args[:]
-	arg_stack.reverse()
-	while arg_stack:
-		arg = arg_stack.pop()
-
-		default_arg_choices = default_arg_opts.get(arg)
-		if default_arg_choices is not None:
-			new_args.append(arg)
-			if arg_stack and arg_stack[-1] in default_arg_choices:
-				new_args.append(arg_stack.pop())
-			else:
-				# insert default argument
-				new_args.append('True')
-			continue
-
-		short_job_opt = bool("j" in arg and arg[:1] == "-" and arg[:2] != "--")
-		if not (short_job_opt or arg in jobs_opts):
-			new_args.append(arg)
-			continue
-
-		# Insert an empty placeholder in order to
-		# satisfy the requirements of optparse.
-
-		new_args.append("--jobs")
-		job_count = None
-		saved_opts = None
-		if short_job_opt and len(arg) > 2:
-			if arg[:2] == "-j":
-				try:
-					job_count = int(arg[2:])
-				except ValueError:
-					saved_opts = arg[2:]
-			else:
-				job_count = "True"
-				saved_opts = arg[1:].replace("j", "")
-
-		if job_count is None and arg_stack:
-			try:
-				job_count = int(arg_stack[-1])
-			except ValueError:
-				pass
-			else:
-				# Discard the job count from the stack
-				# since we're consuming it here.
-				arg_stack.pop()
-
-		if job_count is None:
-			# unlimited number of jobs
-			new_args.append("True")
-		else:
-			new_args.append(str(job_count))
-
-		if saved_opts is not None:
-			new_args.append("-" + saved_opts)
-
-	return new_args
-
-def parse_opts(tmpcmdline, silent=False):
-	myaction=None
-	myopts = {}
-	myfiles=[]
-
-	global options, shortmapping
-
-	actions = frozenset([
-		"clean", "config", "depclean",
-		"info", "list-sets", "metadata",
-		"prune", "regen",  "search",
-		"sync",  "unmerge", "version",
-	])
-
-	longopt_aliases = {"--cols":"--columns", "--skip-first":"--skipfirst"}
-	argument_options = {
-		"--config-root": {
-			"help":"specify the location for portage configuration files",
-			"action":"store"
-		},
-		"--color": {
-			"help":"enable or disable color output",
-			"type":"choice",
-			"choices":("y", "n")
-		},
-
-		"--deselect": {
-			"help"    : "remove atoms from the world file",
-			"type"    : "choice",
-			"choices" : ("True", "n")
-		},
-
-		"--jobs": {
-
-			"help"   : "Specifies the number of packages to build " + \
-				"simultaneously.",
-
-			"action" : "store"
-		},
-
-		"--load-average": {
-
-			"help"   :"Specifies that no new builds should be started " + \
-				"if there are other builds running and the load average " + \
-				"is at least LOAD (a floating-point number).",
-
-			"action" : "store"
-		},
-
-		"--with-bdeps": {
-			"help":"include unnecessary build time dependencies",
-			"type":"choice",
-			"choices":("y", "n")
-		},
-		"--reinstall": {
-			"help":"specify conditions to trigger package reinstallation",
-			"type":"choice",
-			"choices":["changed-use"]
-		},
-		"--root": {
-		 "help"   : "specify the target root filesystem for merging packages",
-		 "action" : "store"
-		},
-
-		"--root-deps": {
-			"help"    : "modify interpretation of depedencies",
-			"type"    : "choice",
-			"choices" :("True", "rdeps")
-		},
-	}
-
-	from optparse import OptionParser
-	parser = OptionParser()
-	if parser.has_option("--help"):
-		parser.remove_option("--help")
-
-	for action_opt in actions:
-		parser.add_option("--" + action_opt, action="store_true",
-			dest=action_opt.replace("-", "_"), default=False)
-	for myopt in options:
-		parser.add_option(myopt, action="store_true",
-			dest=myopt.lstrip("--").replace("-", "_"), default=False)
-	for shortopt, longopt in shortmapping.iteritems():
-		parser.add_option("-" + shortopt, action="store_true",
-			dest=longopt.lstrip("--").replace("-", "_"), default=False)
-	for myalias, myopt in longopt_aliases.iteritems():
-		parser.add_option(myalias, action="store_true",
-			dest=myopt.lstrip("--").replace("-", "_"), default=False)
-
-	for myopt, kwargs in argument_options.iteritems():
-		parser.add_option(myopt,
-			dest=myopt.lstrip("--").replace("-", "_"), **kwargs)
-
-	tmpcmdline = insert_optional_args(tmpcmdline)
-
-	myoptions, myargs = parser.parse_args(args=tmpcmdline)
-
-	if myoptions.deselect == "True":
-		myoptions.deselect = True
-
-	if myoptions.root_deps == "True":
-		myoptions.root_deps = True
-
-	if myoptions.jobs:
-		jobs = None
-		if myoptions.jobs == "True":
-			jobs = True
-		else:
-			try:
-				jobs = int(myoptions.jobs)
-			except ValueError:
-				jobs = -1
-
-		if jobs is not True and \
-			jobs < 1:
-			jobs = None
-			if not silent:
-				writemsg("!!! Invalid --jobs parameter: '%s'\n" % \
-					(myoptions.jobs,), noiselevel=-1)
-
-		myoptions.jobs = jobs
-
-	if myoptions.load_average:
-		try:
-			load_average = float(myoptions.load_average)
-		except ValueError:
-			load_average = 0.0
-
-		if load_average <= 0.0:
-			load_average = None
-			if not silent:
-				writemsg("!!! Invalid --load-average parameter: '%s'\n" % \
-					(myoptions.load_average,), noiselevel=-1)
-
-		myoptions.load_average = load_average
-
-	for myopt in options:
-		v = getattr(myoptions, myopt.lstrip("--").replace("-", "_"))
-		if v:
-			myopts[myopt] = True
-
-	for myopt in argument_options:
-		v = getattr(myoptions, myopt.lstrip("--").replace("-", "_"), None)
-		if v is not None:
-			myopts[myopt] = v
-
-	if myoptions.searchdesc:
-		myoptions.search = True
-
-	for action_opt in actions:
-		v = getattr(myoptions, action_opt.replace("-", "_"))
-		if v:
-			if myaction:
-				multiple_actions(myaction, action_opt)
-				sys.exit(1)
-			myaction = action_opt
-
-	if myaction is None and myoptions.deselect is True:
-		myaction = 'deselect'
-
-	myfiles += myargs
-
-	return myaction, myopts, myfiles
-
-def validate_ebuild_environment(trees):
-	for myroot in trees:
-		settings = trees[myroot]["vartree"].settings
-		settings.validate()
-
-def apply_priorities(settings):
-	ionice(settings)
-	nice(settings)
-
-def nice(settings):
-	try:
-		os.nice(int(settings.get("PORTAGE_NICENESS", "0")))
-	except (OSError, ValueError), e:
-		out = portage.output.EOutput()
-		out.eerror("Failed to change nice value to '%s'" % \
-			settings["PORTAGE_NICENESS"])
-		out.eerror("%s\n" % str(e))
-
-def ionice(settings):
-
-	ionice_cmd = settings.get("PORTAGE_IONICE_COMMAND")
-	if ionice_cmd:
-		ionice_cmd = shlex.split(ionice_cmd)
-	if not ionice_cmd:
-		return
-
-	from portage.util import varexpand
-	variables = {"PID" : str(os.getpid())}
-	cmd = [varexpand(x, mydict=variables) for x in ionice_cmd]
-
-	try:
-		rval = portage.process.spawn(cmd, env=os.environ)
-	except portage.exception.CommandNotFound:
-		# The OS kernel probably doesn't support ionice,
-		# so return silently.
-		return
-
-	if rval != os.EX_OK:
-		out = portage.output.EOutput()
-		out.eerror("PORTAGE_IONICE_COMMAND returned %d" % (rval,))
-		out.eerror("See the make.conf(5) man page for PORTAGE_IONICE_COMMAND usage instructions.")
-
-def expand_set_arguments(myfiles, myaction, root_config):
-	retval = os.EX_OK
-	setconfig = root_config.setconfig
-
-	sets = setconfig.getSets()
-
-	# In order to know exactly which atoms/sets should be added to the
-	# world file, the depgraph performs set expansion later. It will get
-	# confused about where the atoms came from if it's not allowed to
-	# expand them itself.
-	do_not_expand = (None, )
-	newargs = []
-	for a in myfiles:
-		if a in ("system", "world"):
-			newargs.append(SETPREFIX+a)
-		else:
-			newargs.append(a)
-	myfiles = newargs
-	del newargs
-	newargs = []
-
-	# separators for set arguments
-	ARG_START = "{"
-	ARG_END = "}"
-
-	# WARNING: all operators must be of equal length
-	IS_OPERATOR = "/@"
-	DIFF_OPERATOR = "-@"
-	UNION_OPERATOR = "+@"
-	
-	for i in range(0, len(myfiles)):
-		if myfiles[i].startswith(SETPREFIX):
-			start = 0
-			end = 0
-			x = myfiles[i][len(SETPREFIX):]
-			newset = ""
-			while x:
-				start = x.find(ARG_START)
-				end = x.find(ARG_END)
-				if start > 0 and start < end:
-					namepart = x[:start]
-					argpart = x[start+1:end]
-				
-					# TODO: implement proper quoting
-					args = argpart.split(",")
-					options = {}
-					for a in args:
-						if "=" in a:
-							k, v  = a.split("=", 1)
-							options[k] = v
-						else:
-							options[a] = "True"
-					setconfig.update(namepart, options)
-					newset += (x[:start-len(namepart)]+namepart)
-					x = x[end+len(ARG_END):]
-				else:
-					newset += x
-					x = ""
-			myfiles[i] = SETPREFIX+newset
-				
-	sets = setconfig.getSets()
-
-	# display errors that occured while loading the SetConfig instance
-	for e in setconfig.errors:
-		print colorize("BAD", "Error during set creation: %s" % e)
-	
-	# emerge relies on the existance of sets with names "world" and "system"
-	required_sets = ("world", "system")
-	missing_sets = []
-
-	for s in required_sets:
-		if s not in sets:
-			missing_sets.append(s)
-	if missing_sets:
-		if len(missing_sets) > 2:
-			missing_sets_str = ", ".join('"%s"' % s for s in missing_sets[:-1])
-			missing_sets_str += ', and "%s"' % missing_sets[-1]
-		elif len(missing_sets) == 2:
-			missing_sets_str = '"%s" and "%s"' % tuple(missing_sets)
-		else:
-			missing_sets_str = '"%s"' % missing_sets[-1]
-		msg = ["emerge: incomplete set configuration, " + \
-			"missing set(s): %s" % missing_sets_str]
-		if sets:
-			msg.append("        sets defined: %s" % ", ".join(sets))
-		msg.append("        This usually means that '%s'" % \
-			(os.path.join(portage.const.GLOBAL_CONFIG_PATH, "sets.conf"),))
-		msg.append("        is missing or corrupt.")
-		for line in msg:
-			writemsg_level(line + "\n", level=logging.ERROR, noiselevel=-1)
-		return (None, 1)
-	unmerge_actions = ("unmerge", "prune", "clean", "depclean")
-
-	for a in myfiles:
-		if a.startswith(SETPREFIX):
-			# support simple set operations (intersection, difference and union)
-			# on the commandline. Expressions are evaluated strictly left-to-right
-			if IS_OPERATOR in a or DIFF_OPERATOR in a or UNION_OPERATOR in a:
-				expression = a[len(SETPREFIX):]
-				expr_sets = []
-				expr_ops = []
-				while IS_OPERATOR in expression or DIFF_OPERATOR in expression or UNION_OPERATOR in expression:
-					is_pos = expression.rfind(IS_OPERATOR)
-					diff_pos = expression.rfind(DIFF_OPERATOR)
-					union_pos = expression.rfind(UNION_OPERATOR)
-					op_pos = max(is_pos, diff_pos, union_pos)
-					s1 = expression[:op_pos]
-					s2 = expression[op_pos+len(IS_OPERATOR):]
-					op = expression[op_pos:op_pos+len(IS_OPERATOR)]
-					if not s2 in sets:
-						display_missing_pkg_set(root_config, s2)
-						return (None, 1)
-					expr_sets.insert(0, s2)
-					expr_ops.insert(0, op)
-					expression = s1
-				if not expression in sets:
-					display_missing_pkg_set(root_config, expression)
-					return (None, 1)
-				expr_sets.insert(0, expression)
-				result = set(setconfig.getSetAtoms(expression))
-				for i in range(0, len(expr_ops)):
-					s2 = setconfig.getSetAtoms(expr_sets[i+1])
-					if expr_ops[i] == IS_OPERATOR:
-						result.intersection_update(s2)
-					elif expr_ops[i] == DIFF_OPERATOR:
-						result.difference_update(s2)
-					elif expr_ops[i] == UNION_OPERATOR:
-						result.update(s2)
-					else:
-						raise NotImplementedError("unknown set operator %s" % expr_ops[i])
-				newargs.extend(result)
-			else:			
-				s = a[len(SETPREFIX):]
-				if s not in sets:
-					display_missing_pkg_set(root_config, s)
-					return (None, 1)
-				setconfig.active.append(s)
-				try:
-					set_atoms = setconfig.getSetAtoms(s)
-				except portage.exception.PackageSetNotFound, e:
-					writemsg_level(("emerge: the given set '%s' " + \
-						"contains a non-existent set named '%s'.\n") % \
-						(s, e), level=logging.ERROR, noiselevel=-1)
-					return (None, 1)
-				if myaction in unmerge_actions and \
-						not sets[s].supportsOperation("unmerge"):
-					sys.stderr.write("emerge: the given set '%s' does " % s + \
-						"not support unmerge operations\n")
-					retval = 1
-				elif not set_atoms:
-					print "emerge: '%s' is an empty set" % s
-				elif myaction not in do_not_expand:
-					newargs.extend(set_atoms)
-				else:
-					newargs.append(SETPREFIX+s)
-				for e in sets[s].errors:
-					print e
-		else:
-			newargs.append(a)
-	return (newargs, retval)
-
-def repo_name_check(trees):
-	missing_repo_names = set()
-	for root, root_trees in trees.iteritems():
-		if "porttree" in root_trees:
-			portdb = root_trees["porttree"].dbapi
-			missing_repo_names.update(portdb.porttrees)
-			repos = portdb.getRepositories()
-			for r in repos:
-				missing_repo_names.discard(portdb.getRepositoryPath(r))
-			if portdb.porttree_root in missing_repo_names and \
-				not os.path.exists(os.path.join(
-				portdb.porttree_root, "profiles")):
-				# This is normal if $PORTDIR happens to be empty,
-				# so don't warn about it.
-				missing_repo_names.remove(portdb.porttree_root)
-
-	if missing_repo_names:
-		msg = []
-		msg.append("WARNING: One or more repositories " + \
-			"have missing repo_name entries:")
-		msg.append("")
-		for p in missing_repo_names:
-			msg.append("\t%s/profiles/repo_name" % (p,))
-		msg.append("")
-		msg.extend(textwrap.wrap("NOTE: Each repo_name entry " + \
-			"should be a plain text file containing a unique " + \
-			"name for the repository on the first line.", 70))
-		writemsg_level("".join("%s\n" % l for l in msg),
-			level=logging.WARNING, noiselevel=-1)
-
-	return bool(missing_repo_names)
-
-def repo_name_duplicate_check(trees):
-	ignored_repos = {}
-	for root, root_trees in trees.iteritems():
-		if 'porttree' in root_trees:
-			portdb = root_trees['porttree'].dbapi
-			if portdb.mysettings.get('PORTAGE_REPO_DUPLICATE_WARN') != '0':
-				for repo_name, paths in portdb._ignored_repos:
-					k = (root, repo_name, portdb.getRepositoryPath(repo_name))
-					ignored_repos.setdefault(k, []).extend(paths)
-
-	if ignored_repos:
-		msg = []
-		msg.append('WARNING: One or more repositories ' + \
-			'have been ignored due to duplicate')
-		msg.append('  profiles/repo_name entries:')
-		msg.append('')
-		for k in sorted(ignored_repos):
-			msg.append('  %s overrides' % (k,))
-			for path in ignored_repos[k]:
-				msg.append('    %s' % (path,))
-			msg.append('')
-		msg.extend('  ' + x for x in textwrap.wrap(
-			"All profiles/repo_name entries must be unique in order " + \
-			"to avoid having duplicates ignored. " + \
-			"Set PORTAGE_REPO_DUPLICATE_WARN=\"0\" in " + \
-			"/etc/make.conf if you would like to disable this warning."))
-		writemsg_level(''.join('%s\n' % l for l in msg),
-			level=logging.WARNING, noiselevel=-1)
-
-	return bool(ignored_repos)
-
-def config_protect_check(trees):
-	for root, root_trees in trees.iteritems():
-		if not root_trees["root_config"].settings.get("CONFIG_PROTECT"):
-			msg = "!!! CONFIG_PROTECT is empty"
-			if root != "/":
-				msg += " for '%s'" % root
-			writemsg_level(msg, level=logging.WARN, noiselevel=-1)
-
-def profile_check(trees, myaction, myopts):
-	if myaction in ("info", "sync"):
-		return os.EX_OK
-	elif "--version" in myopts or "--help" in myopts:
-		return os.EX_OK
-	for root, root_trees in trees.iteritems():
-		if root_trees["root_config"].settings.profiles:
-			continue
-		# generate some profile related warning messages
-		validate_ebuild_environment(trees)
-		msg = "If you have just changed your profile configuration, you " + \
-			"should revert back to the previous configuration. Due to " + \
-			"your current profile being invalid, allowed actions are " + \
-			"limited to --help, --info, --sync, and --version."
-		writemsg_level("".join("!!! %s\n" % l for l in textwrap.wrap(msg, 70)),
-			level=logging.ERROR, noiselevel=-1)
-		return 1
-	return os.EX_OK
-
-def emerge_main():
-	global portage	# NFC why this is necessary now - genone
-	portage._disable_legacy_globals()
-	# Disable color until we're sure that it should be enabled (after
-	# EMERGE_DEFAULT_OPTS has been parsed).
-	portage.output.havecolor = 0
-	# This first pass is just for options that need to be known as early as
-	# possible, such as --config-root.  They will be parsed again later,
-	# together with EMERGE_DEFAULT_OPTS (which may vary depending on the
-	# the value of --config-root).
-	myaction, myopts, myfiles = parse_opts(sys.argv[1:], silent=True)
-	if "--debug" in myopts:
-		os.environ["PORTAGE_DEBUG"] = "1"
-	if "--config-root" in myopts:
-		os.environ["PORTAGE_CONFIGROOT"] = myopts["--config-root"]
-	if "--root" in myopts:
-		os.environ["ROOT"] = myopts["--root"]
-
-	# Portage needs to ensure a sane umask for the files it creates.
-	os.umask(022)
-	settings, trees, mtimedb = load_emerge_config()
-	portdb = trees[settings["ROOT"]]["porttree"].dbapi
-	rval = profile_check(trees, myaction, myopts)
-	if rval != os.EX_OK:
-		return rval
-
-	if portage._global_updates(trees, mtimedb["updates"]):
-		mtimedb.commit()
-		# Reload the whole config from scratch.
-		settings, trees, mtimedb = load_emerge_config(trees=trees)
-		portdb = trees[settings["ROOT"]]["porttree"].dbapi
-
-	xterm_titles = "notitles" not in settings.features
-
-	tmpcmdline = []
-	if "--ignore-default-opts" not in myopts:
-		tmpcmdline.extend(settings["EMERGE_DEFAULT_OPTS"].split())
-	tmpcmdline.extend(sys.argv[1:])
-	myaction, myopts, myfiles = parse_opts(tmpcmdline)
-
-	if "--digest" in myopts:
-		os.environ["FEATURES"] = os.environ.get("FEATURES","") + " digest"
-		# Reload the whole config from scratch so that the portdbapi internal
-		# config is updated with new FEATURES.
-		settings, trees, mtimedb = load_emerge_config(trees=trees)
-		portdb = trees[settings["ROOT"]]["porttree"].dbapi
-
-	for myroot in trees:
-		mysettings =  trees[myroot]["vartree"].settings
-		mysettings.unlock()
-		adjust_config(myopts, mysettings)
-		if '--pretend' not in myopts and myaction in \
-			(None, 'clean', 'depclean', 'prune', 'unmerge'):
-			mysettings["PORTAGE_COUNTER_HASH"] = \
-				trees[myroot]["vartree"].dbapi._counter_hash()
-			mysettings.backup_changes("PORTAGE_COUNTER_HASH")
-		mysettings.lock()
-		del myroot, mysettings
-
-	apply_priorities(settings)
-
-	spinner = stdout_spinner()
-	if "candy" in settings.features:
-		spinner.update = spinner.update_scroll
-
-	if "--quiet" not in myopts:
-		portage.deprecated_profile_check(settings=settings)
-		repo_name_check(trees)
-		repo_name_duplicate_check(trees)
-		config_protect_check(trees)
-
-	for mytrees in trees.itervalues():
-		mydb = mytrees["porttree"].dbapi
-		# Freeze the portdbapi for performance (memoize all xmatch results).
-		mydb.freeze()
-	del mytrees, mydb
-
-	if "moo" in myfiles:
-		print """
-
-  Larry loves Gentoo (""" + platform.system() + """)
-
- _______________________
-< Have you mooed today? >
- -----------------------
-        \   ^__^
-         \  (oo)\_______
-            (__)\       )\/\ 
-                ||----w |
-                ||     ||
-
-"""
-
-	for x in myfiles:
-		ext = os.path.splitext(x)[1]
-		if (ext == ".ebuild" or ext == ".tbz2") and os.path.exists(os.path.abspath(x)):
-			print colorize("BAD", "\n*** emerging by path is broken and may not always work!!!\n")
-			break
-
-	root_config = trees[settings["ROOT"]]["root_config"]
-	if myaction == "list-sets":
-		sys.stdout.write("".join("%s\n" % s for s in sorted(root_config.sets)))
-		sys.stdout.flush()
-		return os.EX_OK
-
-	# only expand sets for actions taking package arguments
-	oldargs = myfiles[:]
-	if myaction in ("clean", "config", "depclean", "info", "prune", "unmerge", None):
-		myfiles, retval = expand_set_arguments(myfiles, myaction, root_config)
-		if retval != os.EX_OK:
-			return retval
-
-		# Need to handle empty sets specially, otherwise emerge will react 
-		# with the help message for empty argument lists
-		if oldargs and not myfiles:
-			print "emerge: no targets left after set expansion"
-			return 0
-
-	if ("--tree" in myopts) and ("--columns" in myopts):
-		print "emerge: can't specify both of \"--tree\" and \"--columns\"."
-		return 1
-
-	if ("--quiet" in myopts):
-		spinner.update = spinner.update_quiet
-		portage.util.noiselimit = -1
-
-	# Always create packages if FEATURES=buildpkg
-	# Imply --buildpkg if --buildpkgonly
-	if ("buildpkg" in settings.features) or ("--buildpkgonly" in myopts):
-		if "--buildpkg" not in myopts:
-			myopts["--buildpkg"] = True
-
-	# Always try and fetch binary packages if FEATURES=getbinpkg
-	if ("getbinpkg" in settings.features):
-		myopts["--getbinpkg"] = True
-
-	if "--buildpkgonly" in myopts:
-		# --buildpkgonly will not merge anything, so
-		# it cancels all binary package options.
-		for opt in ("--getbinpkg", "--getbinpkgonly",
-			"--usepkg", "--usepkgonly"):
-			myopts.pop(opt, None)
-
-	if "--fetch-all-uri" in myopts:
-		myopts["--fetchonly"] = True
-
-	if "--skipfirst" in myopts and "--resume" not in myopts:
-		myopts["--resume"] = True
-
-	if ("--getbinpkgonly" in myopts) and not ("--usepkgonly" in myopts):
-		myopts["--usepkgonly"] = True
-
-	if ("--getbinpkgonly" in myopts) and not ("--getbinpkg" in myopts):
-		myopts["--getbinpkg"] = True
-
-	if ("--getbinpkg" in myopts) and not ("--usepkg" in myopts):
-		myopts["--usepkg"] = True
-
-	# Also allow -K to apply --usepkg/-k
-	if ("--usepkgonly" in myopts) and not ("--usepkg" in myopts):
-		myopts["--usepkg"] = True
-
-	# Allow -p to remove --ask
-	if "--pretend" in myopts:
-		myopts.pop("--ask", None)
-
-	# forbid --ask when not in a terminal
-	# note: this breaks `emerge --ask | tee logfile`, but that doesn't work anyway.
-	if ("--ask" in myopts) and (not sys.stdin.isatty()):
-		portage.writemsg("!!! \"--ask\" should only be used in a terminal. Exiting.\n",
-			noiselevel=-1)
-		return 1
-
-	if settings.get("PORTAGE_DEBUG", "") == "1":
-		spinner.update = spinner.update_quiet
-		portage.debug=1
-		if "python-trace" in settings.features:
-			import portage.debug
-			portage.debug.set_trace(True)
-
-	if not ("--quiet" in myopts):
-		if not sys.stdout.isatty() or ("--nospinner" in myopts):
-			spinner.update = spinner.update_basic
-
-	if myaction == 'version':
-		print getportageversion(settings["PORTDIR"], settings["ROOT"],
-			settings.profile_path, settings["CHOST"],
-			trees[settings["ROOT"]]["vartree"].dbapi)
-		return 0
-	elif "--help" in myopts:
-		_emerge.help.help(myaction, myopts, portage.output.havecolor)
-		return 0
-
-	if "--debug" in myopts:
-		print "myaction", myaction
-		print "myopts", myopts
-
-	if not myaction and not myfiles and "--resume" not in myopts:
-		_emerge.help.help(myaction, myopts, portage.output.havecolor)
-		return 1
-
-	pretend = "--pretend" in myopts
-	fetchonly = "--fetchonly" in myopts or "--fetch-all-uri" in myopts
-	buildpkgonly = "--buildpkgonly" in myopts
-
-	# check if root user is the current user for the actions where emerge needs this
-	if portage.secpass < 2:
-		# We've already allowed "--version" and "--help" above.
-		if "--pretend" not in myopts and myaction not in ("search","info"):
-			need_superuser = myaction in ('clean', 'depclean', 'deselect',
-				'prune', 'unmerge') or not \
-				(fetchonly or \
-				(buildpkgonly and secpass >= 1) or \
-				myaction in ("metadata", "regen") or \
-				(myaction == "sync" and os.access(settings["PORTDIR"], os.W_OK)))
-			if portage.secpass < 1 or \
-				need_superuser:
-				if need_superuser:
-					access_desc = "superuser"
-				else:
-					access_desc = "portage group"
-				# Always show portage_group_warning() when only portage group
-				# access is required but the user is not in the portage group.
-				from portage.data import portage_group_warning
-				if "--ask" in myopts:
-					myopts["--pretend"] = True
-					del myopts["--ask"]
-					print ("%s access is required... " + \
-						"adding --pretend to options\n") % access_desc
-					if portage.secpass < 1 and not need_superuser:
-						portage_group_warning()
-				else:
-					sys.stderr.write(("emerge: %s access is required\n") \
-						% access_desc)
-					if portage.secpass < 1 and not need_superuser:
-						portage_group_warning()
-					return 1
-
-	disable_emergelog = False
-	for x in ("--pretend", "--fetchonly", "--fetch-all-uri"):
-		if x in myopts:
-			disable_emergelog = True
-			break
-	if myaction in ("search", "info"):
-		disable_emergelog = True
-	if disable_emergelog:
-		""" Disable emergelog for everything except build or unmerge
-		operations.  This helps minimize parallel emerge.log entries that can
-		confuse log parsers.  We especially want it disabled during
-		parallel-fetch, which uses --resume --fetchonly."""
-		global emergelog
-		def emergelog(*pargs, **kargs):
-			pass
-
-	else:
-		if 'EMERGE_LOG_DIR' in settings:
-			try:
-				# At least the parent needs to exist for the lock file.
-				portage.util.ensure_dirs(settings['EMERGE_LOG_DIR'])
-			except portage.exception.PortageException, e:
-				writemsg_level("!!! Error creating directory for " + \
-					"EMERGE_LOG_DIR='%s':\n!!! %s\n" % \
-					(settings['EMERGE_LOG_DIR'], e),
-					noiselevel=-1, level=logging.ERROR)
-			else:
-				global _emerge_log_dir
-				_emerge_log_dir = settings['EMERGE_LOG_DIR']
-
-	if not "--pretend" in myopts:
-		emergelog(xterm_titles, "Started emerge on: "+\
-			time.strftime("%b %d, %Y %H:%M:%S", time.localtime()))
-		myelogstr=""
-		if myopts:
-			myelogstr=" ".join(myopts)
-		if myaction:
-			myelogstr+=" "+myaction
-		if myfiles:
-			myelogstr += " " + " ".join(oldargs)
-		emergelog(xterm_titles, " *** emerge " + myelogstr)
-	del oldargs
-
-	def emergeexitsig(signum, frame):
-		signal.signal(signal.SIGINT, signal.SIG_IGN)
-		signal.signal(signal.SIGTERM, signal.SIG_IGN)
-		portage.util.writemsg("\n\nExiting on signal %(signal)s\n" % {"signal":signum})
-		sys.exit(100+signum)
-	signal.signal(signal.SIGINT, emergeexitsig)
-	signal.signal(signal.SIGTERM, emergeexitsig)
-
-	def emergeexit():
-		"""This gets out final log message in before we quit."""
-		if "--pretend" not in myopts:
-			emergelog(xterm_titles, " *** terminating.")
-		if "notitles" not in settings.features:
-			xtermTitleReset()
-	portage.atexit_register(emergeexit)
-
-	if myaction in ("config", "metadata", "regen", "sync"):
-		if "--pretend" in myopts:
-			sys.stderr.write(("emerge: The '%s' action does " + \
-				"not support '--pretend'.\n") % myaction)
-			return 1
-
-	if "sync" == myaction:
-		return action_sync(settings, trees, mtimedb, myopts, myaction)
-	elif "metadata" == myaction:
-		action_metadata(settings, portdb, myopts)
-	elif myaction=="regen":
-		validate_ebuild_environment(trees)
-		return action_regen(settings, portdb, myopts.get("--jobs"),
-			myopts.get("--load-average"))
-	# HELP action
-	elif "config"==myaction:
-		validate_ebuild_environment(trees)
-		action_config(settings, trees, myopts, myfiles)
-
-	# SEARCH action
-	elif "search"==myaction:
-		validate_ebuild_environment(trees)
-		action_search(trees[settings["ROOT"]]["root_config"],
-			myopts, myfiles, spinner)
-
-	elif myaction in ('clean', 'depclean', 'deselect', 'prune', 'unmerge'):
-		validate_ebuild_environment(trees)
-		rval = action_uninstall(settings, trees, mtimedb["ldpath"],
-			myopts, myaction, myfiles, spinner)
-		if not (myaction == 'deselect' or buildpkgonly or fetchonly or pretend):
-			post_emerge(root_config, myopts, mtimedb, rval)
-		return rval
-
-	elif myaction == 'info':
-
-		# Ensure atoms are valid before calling unmerge().
-		vardb = trees[settings["ROOT"]]["vartree"].dbapi
-		valid_atoms = []
-		for x in myfiles:
-			if is_valid_package_atom(x):
-				try:
-					valid_atoms.append(
-						portage.dep_expand(x, mydb=vardb, settings=settings))
-				except portage.exception.AmbiguousPackageName, e:
-					msg = "The short ebuild name \"" + x + \
-						"\" is ambiguous.  Please specify " + \
-						"one of the following " + \
-						"fully-qualified ebuild names instead:"
-					for line in textwrap.wrap(msg, 70):
-						writemsg_level("!!! %s\n" % (line,),
-							level=logging.ERROR, noiselevel=-1)
-					for i in e[0]:
-						writemsg_level("    %s\n" % colorize("INFORM", i),
-							level=logging.ERROR, noiselevel=-1)
-					writemsg_level("\n", level=logging.ERROR, noiselevel=-1)
-					return 1
-				continue
-			msg = []
-			msg.append("'%s' is not a valid package atom." % (x,))
-			msg.append("Please check ebuild(5) for full details.")
-			writemsg_level("".join("!!! %s\n" % line for line in msg),
-				level=logging.ERROR, noiselevel=-1)
-			return 1
-
-		return action_info(settings, trees, myopts, valid_atoms)
-
-	# "update", "system", or just process files:
-	else:
-		validate_ebuild_environment(trees)
-
-		for x in myfiles:
-			if x.startswith(SETPREFIX) or \
-				is_valid_package_atom(x):
-				continue
-			if x[:1] == os.sep:
-				continue
-			try:
-				os.lstat(x)
-				continue
-			except OSError:
-				pass
-			msg = []
-			msg.append("'%s' is not a valid package atom." % (x,))
-			msg.append("Please check ebuild(5) for full details.")
-			writemsg_level("".join("!!! %s\n" % line for line in msg),
-				level=logging.ERROR, noiselevel=-1)
-			return 1
-
-		if "--pretend" not in myopts:
-			display_news_notification(root_config, myopts)
-		retval = action_build(settings, trees, mtimedb,
-			myopts, myaction, myfiles, spinner)
-		root_config = trees[settings["ROOT"]]["root_config"]
-		post_emerge(root_config, myopts, mtimedb, retval)
-
-		return retval

Copied: main/branches/prefix/pym/_emerge/main.py (from rev 13715, main/branches/prefix/pym/_emerge/__init__.py)
===================================================================
--- main/branches/prefix/pym/_emerge/main.py	                        (rev 0)
+++ main/branches/prefix/pym/_emerge/main.py	2009-06-28 13:36:35 UTC (rev 13719)
@@ -0,0 +1,1295 @@
+# Copyright 1999-2009 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+import logging
+import shlex
+import signal
+import sys
+import textwrap
+import os
+import platform
+
+# Portage module path logic (Prefix way)
+# In principle we don't want to be dependant on the environment
+# (PYTHONPATH) and/or python hardcoded default search path.
+# (PYTHONPATH).  Since Gentoo patches Python to include Portage's python
+# modules in the default search path, any Gentoo python interpreter is
+# an enemy for Portage once it is not installed in the path hardcoded
+# during Python compilation.  This is the case when bootstrapping
+# Prefix Portage on a Gentoo Linux system, or when bootstrapping Prefix
+# Portage using another Prefix instance on the same system.  For this
+# reason we ignore the entire search path, and allow a backdoor for
+# developers via the PORTAGE_PYTHONPATH variable.
+import os
+import sys
+if os.environ.__contains__("PORTAGE_PYTHONPATH"):
+	sys.path.insert(0, os.environ["PORTAGE_PYTHONPATH"])
+else:
+	sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(os.path.realpath(__file__))), "pym"))
+import portage
+
+import _emerge.help
+import portage.xpak, commands, errno, re, time
+from portage.output import colorize, xtermTitleReset
+from portage.output import create_color_func
+good = create_color_func("GOOD")
+bad = create_color_func("BAD")
+
+import portage.elog
+import portage.dep
+portage.dep._dep_check_strict = True
+import portage.util
+import portage.locks
+import portage.exception
+from portage.const import EPREFIX, BPREFIX, EPREFIX_LSTRIP
+from portage.data import secpass
+from portage.util import normalize_path as normpath
+from portage.util import writemsg, writemsg_level
+from portage.sets import SETPREFIX
+
+from _emerge.actions import action_config, action_sync, action_metadata, \
+	action_regen, action_search, action_uninstall, action_info, action_build, \
+	adjust_config, chk_updated_cfg_files, display_missing_pkg_set, \
+	display_news_notification, getportageversion, load_emerge_config
+from _emerge.emergelog import emergelog
+from _emerge._flush_elog_mod_echo import _flush_elog_mod_echo
+from _emerge.is_valid_package_atom import is_valid_package_atom
+from _emerge.stdout_spinner import stdout_spinner
+
+options=[
+"--ask",          "--alphabetical",
+"--buildpkg",     "--buildpkgonly",
+"--changelog",    "--columns",
+"--complete-graph",
+"--debug",        "--deep",
+"--digest",
+"--emptytree",
+"--fetchonly",    "--fetch-all-uri",
+"--getbinpkg",    "--getbinpkgonly",
+"--help",         "--ignore-default-opts",
+"--keep-going",
+"--noconfmem",
+"--newuse",
+"--nodeps",       "--noreplace",
+"--nospinner",    "--oneshot",
+"--onlydeps",     "--pretend",
+"--quiet",        "--resume",
+"--searchdesc",   "--selective",
+"--skipfirst",
+"--tree",
+"--update",
+"--usepkg",       "--usepkgonly",
+"--verbose",
+]
+
+shortmapping={
+"1":"--oneshot",
+"a":"--ask",
+"b":"--buildpkg",  "B":"--buildpkgonly",
+"c":"--clean",     "C":"--unmerge",
+"d":"--debug",     "D":"--deep",
+"e":"--emptytree",
+"f":"--fetchonly", "F":"--fetch-all-uri",
+"g":"--getbinpkg", "G":"--getbinpkgonly",
+"h":"--help",
+"k":"--usepkg",    "K":"--usepkgonly",
+"l":"--changelog",
+"n":"--noreplace", "N":"--newuse",
+"o":"--onlydeps",  "O":"--nodeps",
+"p":"--pretend",   "P":"--prune",
+"q":"--quiet",
+"s":"--search",    "S":"--searchdesc",
+"t":"--tree",
+"u":"--update",
+"v":"--verbose",   "V":"--version"
+}
+
+def chk_updated_info_files(root, infodirs, prev_mtimes, retval):
+
+	if os.path.exists(EPREFIX + "/usr/bin/install-info"):
+		out = portage.output.EOutput()
+		regen_infodirs=[]
+		for z in infodirs:
+			if z=='':
+				continue
+			inforoot=normpath(root+z)
+			if os.path.isdir(inforoot):
+				infomtime = long(os.stat(inforoot).st_mtime)
+				if inforoot not in prev_mtimes or \
+					prev_mtimes[inforoot] != infomtime:
+						regen_infodirs.append(inforoot)
+
+		if not regen_infodirs:
+			portage.writemsg_stdout("\n")
+			out.einfo("GNU info directory index is up-to-date.")
+		else:
+			portage.writemsg_stdout("\n")
+			out.einfo("Regenerating GNU info directory index...")
+
+			dir_extensions = ("", ".gz", ".bz2")
+			icount=0
+			badcount=0
+			errmsg = ""
+			for inforoot in regen_infodirs:
+				if inforoot=='':
+					continue
+
+				if not os.path.isdir(inforoot) or \
+					not os.access(inforoot, os.W_OK):
+					continue
+
+				file_list = os.listdir(inforoot)
+				file_list.sort()
+				dir_file = os.path.join(inforoot, "dir")
+				moved_old_dir = False
+				processed_count = 0
+				for x in file_list:
+					if x.startswith(".") or \
+						os.path.isdir(os.path.join(inforoot, x)):
+						continue
+					if x.startswith("dir"):
+						skip = False
+						for ext in dir_extensions:
+							if x == "dir" + ext or \
+								x == "dir" + ext + ".old":
+								skip = True
+								break
+						if skip:
+							continue
+					if processed_count == 0:
+						for ext in dir_extensions:
+							try:
+								os.rename(dir_file + ext, dir_file + ext + ".old")
+								moved_old_dir = True
+							except EnvironmentError, e:
+								if e.errno != errno.ENOENT:
+									raise
+								del e
+					processed_count += 1
+					myso=commands.getstatusoutput("LANG=C LANGUAGE=C " + EPREFIX + "/usr/bin/install-info --dir-file="+inforoot+"/dir "+inforoot+"/"+x)[1]
+					existsstr="already exists, for file `"
+					if myso!="":
+						if re.search(existsstr,myso):
+							# Already exists... Don't increment the count for this.
+							pass
+						elif myso[:44]=="install-info: warning: no info dir entry in ":
+							# This info file doesn't contain a DIR-header: install-info produces this
+							# (harmless) warning (the --quiet switch doesn't seem to work).
+							# Don't increment the count for this.
+							pass
+						else:
+							badcount=badcount+1
+							errmsg += myso + "\n"
+					icount=icount+1
+
+				if moved_old_dir and not os.path.exists(dir_file):
+					# We didn't generate a new dir file, so put the old file
+					# back where it was originally found.
+					for ext in dir_extensions:
+						try:
+							os.rename(dir_file + ext + ".old", dir_file + ext)
+						except EnvironmentError, e:
+							if e.errno != errno.ENOENT:
+								raise
+							del e
+
+				# Clean dir.old cruft so that they don't prevent
+				# unmerge of otherwise empty directories.
+				for ext in dir_extensions:
+					try:
+						os.unlink(dir_file + ext + ".old")
+					except EnvironmentError, e:
+						if e.errno != errno.ENOENT:
+							raise
+						del e
+
+				#update mtime so we can potentially avoid regenerating.
+				prev_mtimes[inforoot] = long(os.stat(inforoot).st_mtime)
+
+			if badcount:
+				out.eerror("Processed %d info files; %d errors." % \
+					(icount, badcount))
+				writemsg_level(errmsg, level=logging.ERROR, noiselevel=-1)
+			else:
+				if icount > 0:
+					out.einfo("Processed %d info files." % (icount,))
+
+
+def display_preserved_libs(vardbapi):
+	MAX_DISPLAY = 3
+
+	# Ensure the registry is consistent with existing files.
+	vardbapi.plib_registry.pruneNonExisting()
+
+	if vardbapi.plib_registry.hasEntries():
+		print
+		print colorize("WARN", "!!!") + " existing preserved libs:"
+		plibdata = vardbapi.plib_registry.getPreservedLibs()
+		linkmap = vardbapi.linkmap
+		consumer_map = {}
+		owners = {}
+		linkmap_broken = False
+
+		try:
+			linkmap.rebuild()
+		except portage.exception.CommandNotFound, e:
+			writemsg_level("!!! Command Not Found: %s\n" % (e,),
+				level=logging.ERROR, noiselevel=-1)
+			del e
+			linkmap_broken = True
+		else:
+			search_for_owners = set()
+			for cpv in plibdata:
+				internal_plib_keys = set(linkmap._obj_key(f) \
+					for f in plibdata[cpv])
+				for f in plibdata[cpv]:
+					if f in consumer_map:
+						continue
+					consumers = []
+					for c in linkmap.findConsumers(f):
+						# Filter out any consumers that are also preserved libs
+						# belonging to the same package as the provider.
+						if linkmap._obj_key(c) not in internal_plib_keys:
+							consumers.append(c)
+					consumers.sort()
+					consumer_map[f] = consumers
+					search_for_owners.update(consumers[:MAX_DISPLAY+1])
+
+			owners = vardbapi._owners.getFileOwnerMap(search_for_owners)
+
+		for cpv in plibdata:
+			print colorize("WARN", ">>>") + " package: %s" % cpv
+			samefile_map = {}
+			for f in plibdata[cpv]:
+				obj_key = linkmap._obj_key(f)
+				alt_paths = samefile_map.get(obj_key)
+				if alt_paths is None:
+					alt_paths = set()
+					samefile_map[obj_key] = alt_paths
+				alt_paths.add(f)
+
+			for alt_paths in samefile_map.itervalues():
+				alt_paths = sorted(alt_paths)
+				for p in alt_paths:
+					print colorize("WARN", " * ") + " - %s" % (p,)
+				f = alt_paths[0]
+				consumers = consumer_map.get(f, [])
+				for c in consumers[:MAX_DISPLAY]:
+					print colorize("WARN", " * ") + "     used by %s (%s)" % \
+						(c, ", ".join(x.mycpv for x in owners.get(c, [])))
+				if len(consumers) == MAX_DISPLAY + 1:
+					print colorize("WARN", " * ") + "     used by %s (%s)" % \
+						(consumers[MAX_DISPLAY], ", ".join(x.mycpv \
+						for x in owners.get(consumers[MAX_DISPLAY], [])))
+				elif len(consumers) > MAX_DISPLAY:
+					print colorize("WARN", " * ") + "     used by %d other files" % (len(consumers) - MAX_DISPLAY)
+		print "Use " + colorize("GOOD", "emerge @preserved-rebuild") + " to rebuild packages using these libraries"
+
+
+def post_emerge(root_config, myopts, mtimedb, retval):
+	"""
+	Misc. things to run at the end of a merge session.
+	
+	Update Info Files
+	Update Config Files
+	Update News Items
+	Commit mtimeDB
+	Display preserved libs warnings
+	Exit Emerge
+
+	@param trees: A dictionary mapping each ROOT to it's package databases
+	@type trees: dict
+	@param mtimedb: The mtimeDB to store data needed across merge invocations
+	@type mtimedb: MtimeDB class instance
+	@param retval: Emerge's return value
+	@type retval: Int
+	@rype: None
+	@returns:
+	1.  Calls sys.exit(retval)
+	"""
+
+	target_root = root_config.root
+	trees = { target_root : root_config.trees }
+	vardbapi = trees[target_root]["vartree"].dbapi
+	settings = vardbapi.settings
+	info_mtimes = mtimedb["info"]
+
+	# Load the most current variables from ${ROOT}/etc/profile.env
+	settings.unlock()
+	settings.reload()
+	settings.regenerate()
+	settings.lock()
+
+	config_protect = settings.get("CONFIG_PROTECT","").split()
+	infodirs = settings.get("INFOPATH","").split(":") + \
+		settings.get("INFODIR","").split(":")
+
+	os.chdir("/")
+
+	if retval == os.EX_OK:
+		exit_msg = " *** exiting successfully."
+	else:
+		exit_msg = " *** exiting unsuccessfully with status '%s'." % retval
+	emergelog("notitles" not in settings.features, exit_msg)
+
+	_flush_elog_mod_echo()
+
+	counter_hash = settings.get("PORTAGE_COUNTER_HASH")
+	if "--pretend" in myopts or (counter_hash is not None and \
+		counter_hash == vardbapi._counter_hash()):
+		display_news_notification(root_config, myopts)
+		# If vdb state has not changed then there's nothing else to do.
+		sys.exit(retval)
+
+	vdb_path = os.path.join(target_root, portage.VDB_PATH)
+	portage.util.ensure_dirs(vdb_path)
+	vdb_lock = None
+	if os.access(vdb_path, os.W_OK) and not "--pretend" in myopts:
+		vdb_lock = portage.locks.lockdir(vdb_path)
+
+	if vdb_lock:
+		try:
+			if "noinfo" not in settings.features:
+				chk_updated_info_files(target_root + EPREFIX,
+					infodirs, info_mtimes, retval)
+			mtimedb.commit()
+		finally:
+			if vdb_lock:
+				portage.locks.unlockdir(vdb_lock)
+
+	chk_updated_cfg_files(target_root + EPREFIX, config_protect)
+	
+	display_news_notification(root_config, myopts)
+	if retval in (None, os.EX_OK) or (not "--pretend" in myopts):
+		display_preserved_libs(vardbapi)	
+
+	sys.exit(retval)
+
+
+def multiple_actions(action1, action2):
+	sys.stderr.write("\n!!! Multiple actions requested... Please choose one only.\n")
+	sys.stderr.write("!!! '%s' or '%s'\n\n" % (action1, action2))
+	sys.exit(1)
+
+def insert_optional_args(args):
+	"""
+	Parse optional arguments and insert a value if one has
+	not been provided. This is done before feeding the args
+	to the optparse parser since that parser does not support
+	this feature natively.
+	"""
+
+	new_args = []
+	jobs_opts = ("-j", "--jobs")
+	default_arg_opts = {
+		'--deselect'   : ('n',),
+		'--root-deps'  : ('rdeps',),
+	}
+	arg_stack = args[:]
+	arg_stack.reverse()
+	while arg_stack:
+		arg = arg_stack.pop()
+
+		default_arg_choices = default_arg_opts.get(arg)
+		if default_arg_choices is not None:
+			new_args.append(arg)
+			if arg_stack and arg_stack[-1] in default_arg_choices:
+				new_args.append(arg_stack.pop())
+			else:
+				# insert default argument
+				new_args.append('True')
+			continue
+
+		short_job_opt = bool("j" in arg and arg[:1] == "-" and arg[:2] != "--")
+		if not (short_job_opt or arg in jobs_opts):
+			new_args.append(arg)
+			continue
+
+		# Insert an empty placeholder in order to
+		# satisfy the requirements of optparse.
+
+		new_args.append("--jobs")
+		job_count = None
+		saved_opts = None
+		if short_job_opt and len(arg) > 2:
+			if arg[:2] == "-j":
+				try:
+					job_count = int(arg[2:])
+				except ValueError:
+					saved_opts = arg[2:]
+			else:
+				job_count = "True"
+				saved_opts = arg[1:].replace("j", "")
+
+		if job_count is None and arg_stack:
+			try:
+				job_count = int(arg_stack[-1])
+			except ValueError:
+				pass
+			else:
+				# Discard the job count from the stack
+				# since we're consuming it here.
+				arg_stack.pop()
+
+		if job_count is None:
+			# unlimited number of jobs
+			new_args.append("True")
+		else:
+			new_args.append(str(job_count))
+
+		if saved_opts is not None:
+			new_args.append("-" + saved_opts)
+
+	return new_args
+
+def parse_opts(tmpcmdline, silent=False):
+	myaction=None
+	myopts = {}
+	myfiles=[]
+
+	global options, shortmapping
+
+	actions = frozenset([
+		"clean", "config", "depclean",
+		"info", "list-sets", "metadata",
+		"prune", "regen",  "search",
+		"sync",  "unmerge", "version",
+	])
+
+	longopt_aliases = {"--cols":"--columns", "--skip-first":"--skipfirst"}
+	argument_options = {
+		"--config-root": {
+			"help":"specify the location for portage configuration files",
+			"action":"store"
+		},
+		"--color": {
+			"help":"enable or disable color output",
+			"type":"choice",
+			"choices":("y", "n")
+		},
+
+		"--deselect": {
+			"help"    : "remove atoms from the world file",
+			"type"    : "choice",
+			"choices" : ("True", "n")
+		},
+
+		"--jobs": {
+
+			"help"   : "Specifies the number of packages to build " + \
+				"simultaneously.",
+
+			"action" : "store"
+		},
+
+		"--load-average": {
+
+			"help"   :"Specifies that no new builds should be started " + \
+				"if there are other builds running and the load average " + \
+				"is at least LOAD (a floating-point number).",
+
+			"action" : "store"
+		},
+
+		"--with-bdeps": {
+			"help":"include unnecessary build time dependencies",
+			"type":"choice",
+			"choices":("y", "n")
+		},
+		"--reinstall": {
+			"help":"specify conditions to trigger package reinstallation",
+			"type":"choice",
+			"choices":["changed-use"]
+		},
+		"--root": {
+		 "help"   : "specify the target root filesystem for merging packages",
+		 "action" : "store"
+		},
+
+		"--root-deps": {
+			"help"    : "modify interpretation of depedencies",
+			"type"    : "choice",
+			"choices" :("True", "rdeps")
+		},
+	}
+
+	from optparse import OptionParser
+	parser = OptionParser()
+	if parser.has_option("--help"):
+		parser.remove_option("--help")
+
+	for action_opt in actions:
+		parser.add_option("--" + action_opt, action="store_true",
+			dest=action_opt.replace("-", "_"), default=False)
+	for myopt in options:
+		parser.add_option(myopt, action="store_true",
+			dest=myopt.lstrip("--").replace("-", "_"), default=False)
+	for shortopt, longopt in shortmapping.iteritems():
+		parser.add_option("-" + shortopt, action="store_true",
+			dest=longopt.lstrip("--").replace("-", "_"), default=False)
+	for myalias, myopt in longopt_aliases.iteritems():
+		parser.add_option(myalias, action="store_true",
+			dest=myopt.lstrip("--").replace("-", "_"), default=False)
+
+	for myopt, kwargs in argument_options.iteritems():
+		parser.add_option(myopt,
+			dest=myopt.lstrip("--").replace("-", "_"), **kwargs)
+
+	tmpcmdline = insert_optional_args(tmpcmdline)
+
+	myoptions, myargs = parser.parse_args(args=tmpcmdline)
+
+	if myoptions.deselect == "True":
+		myoptions.deselect = True
+
+	if myoptions.root_deps == "True":
+		myoptions.root_deps = True
+
+	if myoptions.jobs:
+		jobs = None
+		if myoptions.jobs == "True":
+			jobs = True
+		else:
+			try:
+				jobs = int(myoptions.jobs)
+			except ValueError:
+				jobs = -1
+
+		if jobs is not True and \
+			jobs < 1:
+			jobs = None
+			if not silent:
+				writemsg("!!! Invalid --jobs parameter: '%s'\n" % \
+					(myoptions.jobs,), noiselevel=-1)
+
+		myoptions.jobs = jobs
+
+	if myoptions.load_average:
+		try:
+			load_average = float(myoptions.load_average)
+		except ValueError:
+			load_average = 0.0
+
+		if load_average <= 0.0:
+			load_average = None
+			if not silent:
+				writemsg("!!! Invalid --load-average parameter: '%s'\n" % \
+					(myoptions.load_average,), noiselevel=-1)
+
+		myoptions.load_average = load_average
+
+	for myopt in options:
+		v = getattr(myoptions, myopt.lstrip("--").replace("-", "_"))
+		if v:
+			myopts[myopt] = True
+
+	for myopt in argument_options:
+		v = getattr(myoptions, myopt.lstrip("--").replace("-", "_"), None)
+		if v is not None:
+			myopts[myopt] = v
+
+	if myoptions.searchdesc:
+		myoptions.search = True
+
+	for action_opt in actions:
+		v = getattr(myoptions, action_opt.replace("-", "_"))
+		if v:
+			if myaction:
+				multiple_actions(myaction, action_opt)
+				sys.exit(1)
+			myaction = action_opt
+
+	if myaction is None and myoptions.deselect is True:
+		myaction = 'deselect'
+
+	myfiles += myargs
+
+	return myaction, myopts, myfiles
+
+def validate_ebuild_environment(trees):
+	for myroot in trees:
+		settings = trees[myroot]["vartree"].settings
+		settings.validate()
+
+def apply_priorities(settings):
+	ionice(settings)
+	nice(settings)
+
+def nice(settings):
+	try:
+		os.nice(int(settings.get("PORTAGE_NICENESS", "0")))
+	except (OSError, ValueError), e:
+		out = portage.output.EOutput()
+		out.eerror("Failed to change nice value to '%s'" % \
+			settings["PORTAGE_NICENESS"])
+		out.eerror("%s\n" % str(e))
+
+def ionice(settings):
+
+	ionice_cmd = settings.get("PORTAGE_IONICE_COMMAND")
+	if ionice_cmd:
+		ionice_cmd = shlex.split(ionice_cmd)
+	if not ionice_cmd:
+		return
+
+	from portage.util import varexpand
+	variables = {"PID" : str(os.getpid())}
+	cmd = [varexpand(x, mydict=variables) for x in ionice_cmd]
+
+	try:
+		rval = portage.process.spawn(cmd, env=os.environ)
+	except portage.exception.CommandNotFound:
+		# The OS kernel probably doesn't support ionice,
+		# so return silently.
+		return
+
+	if rval != os.EX_OK:
+		out = portage.output.EOutput()
+		out.eerror("PORTAGE_IONICE_COMMAND returned %d" % (rval,))
+		out.eerror("See the make.conf(5) man page for PORTAGE_IONICE_COMMAND usage instructions.")
+
+def expand_set_arguments(myfiles, myaction, root_config):
+	retval = os.EX_OK
+	setconfig = root_config.setconfig
+
+	sets = setconfig.getSets()
+
+	# In order to know exactly which atoms/sets should be added to the
+	# world file, the depgraph performs set expansion later. It will get
+	# confused about where the atoms came from if it's not allowed to
+	# expand them itself.
+	do_not_expand = (None, )
+	newargs = []
+	for a in myfiles:
+		if a in ("system", "world"):
+			newargs.append(SETPREFIX+a)
+		else:
+			newargs.append(a)
+	myfiles = newargs
+	del newargs
+	newargs = []
+
+	# separators for set arguments
+	ARG_START = "{"
+	ARG_END = "}"
+
+	# WARNING: all operators must be of equal length
+	IS_OPERATOR = "/@"
+	DIFF_OPERATOR = "-@"
+	UNION_OPERATOR = "+@"
+	
+	for i in range(0, len(myfiles)):
+		if myfiles[i].startswith(SETPREFIX):
+			start = 0
+			end = 0
+			x = myfiles[i][len(SETPREFIX):]
+			newset = ""
+			while x:
+				start = x.find(ARG_START)
+				end = x.find(ARG_END)
+				if start > 0 and start < end:
+					namepart = x[:start]
+					argpart = x[start+1:end]
+				
+					# TODO: implement proper quoting
+					args = argpart.split(",")
+					options = {}
+					for a in args:
+						if "=" in a:
+							k, v  = a.split("=", 1)
+							options[k] = v
+						else:
+							options[a] = "True"
+					setconfig.update(namepart, options)
+					newset += (x[:start-len(namepart)]+namepart)
+					x = x[end+len(ARG_END):]
+				else:
+					newset += x
+					x = ""
+			myfiles[i] = SETPREFIX+newset
+				
+	sets = setconfig.getSets()
+
+	# display errors that occured while loading the SetConfig instance
+	for e in setconfig.errors:
+		print colorize("BAD", "Error during set creation: %s" % e)
+	
+	# emerge relies on the existance of sets with names "world" and "system"
+	required_sets = ("world", "system")
+	missing_sets = []
+
+	for s in required_sets:
+		if s not in sets:
+			missing_sets.append(s)
+	if missing_sets:
+		if len(missing_sets) > 2:
+			missing_sets_str = ", ".join('"%s"' % s for s in missing_sets[:-1])
+			missing_sets_str += ', and "%s"' % missing_sets[-1]
+		elif len(missing_sets) == 2:
+			missing_sets_str = '"%s" and "%s"' % tuple(missing_sets)
+		else:
+			missing_sets_str = '"%s"' % missing_sets[-1]
+		msg = ["emerge: incomplete set configuration, " + \
+			"missing set(s): %s" % missing_sets_str]
+		if sets:
+			msg.append("        sets defined: %s" % ", ".join(sets))
+		msg.append("        This usually means that '%s'" % \
+			(os.path.join(portage.const.GLOBAL_CONFIG_PATH, "sets.conf"),))
+		msg.append("        is missing or corrupt.")
+		for line in msg:
+			writemsg_level(line + "\n", level=logging.ERROR, noiselevel=-1)
+		return (None, 1)
+	unmerge_actions = ("unmerge", "prune", "clean", "depclean")
+
+	for a in myfiles:
+		if a.startswith(SETPREFIX):
+			# support simple set operations (intersection, difference and union)
+			# on the commandline. Expressions are evaluated strictly left-to-right
+			if IS_OPERATOR in a or DIFF_OPERATOR in a or UNION_OPERATOR in a:
+				expression = a[len(SETPREFIX):]
+				expr_sets = []
+				expr_ops = []
+				while IS_OPERATOR in expression or DIFF_OPERATOR in expression or UNION_OPERATOR in expression:
+					is_pos = expression.rfind(IS_OPERATOR)
+					diff_pos = expression.rfind(DIFF_OPERATOR)
+					union_pos = expression.rfind(UNION_OPERATOR)
+					op_pos = max(is_pos, diff_pos, union_pos)
+					s1 = expression[:op_pos]
+					s2 = expression[op_pos+len(IS_OPERATOR):]
+					op = expression[op_pos:op_pos+len(IS_OPERATOR)]
+					if not s2 in sets:
+						display_missing_pkg_set(root_config, s2)
+						return (None, 1)
+					expr_sets.insert(0, s2)
+					expr_ops.insert(0, op)
+					expression = s1
+				if not expression in sets:
+					display_missing_pkg_set(root_config, expression)
+					return (None, 1)
+				expr_sets.insert(0, expression)
+				result = set(setconfig.getSetAtoms(expression))
+				for i in range(0, len(expr_ops)):
+					s2 = setconfig.getSetAtoms(expr_sets[i+1])
+					if expr_ops[i] == IS_OPERATOR:
+						result.intersection_update(s2)
+					elif expr_ops[i] == DIFF_OPERATOR:
+						result.difference_update(s2)
+					elif expr_ops[i] == UNION_OPERATOR:
+						result.update(s2)
+					else:
+						raise NotImplementedError("unknown set operator %s" % expr_ops[i])
+				newargs.extend(result)
+			else:			
+				s = a[len(SETPREFIX):]
+				if s not in sets:
+					display_missing_pkg_set(root_config, s)
+					return (None, 1)
+				setconfig.active.append(s)
+				try:
+					set_atoms = setconfig.getSetAtoms(s)
+				except portage.exception.PackageSetNotFound, e:
+					writemsg_level(("emerge: the given set '%s' " + \
+						"contains a non-existent set named '%s'.\n") % \
+						(s, e), level=logging.ERROR, noiselevel=-1)
+					return (None, 1)
+				if myaction in unmerge_actions and \
+						not sets[s].supportsOperation("unmerge"):
+					sys.stderr.write("emerge: the given set '%s' does " % s + \
+						"not support unmerge operations\n")
+					retval = 1
+				elif not set_atoms:
+					print "emerge: '%s' is an empty set" % s
+				elif myaction not in do_not_expand:
+					newargs.extend(set_atoms)
+				else:
+					newargs.append(SETPREFIX+s)
+				for e in sets[s].errors:
+					print e
+		else:
+			newargs.append(a)
+	return (newargs, retval)
+
+def repo_name_check(trees):
+	missing_repo_names = set()
+	for root, root_trees in trees.iteritems():
+		if "porttree" in root_trees:
+			portdb = root_trees["porttree"].dbapi
+			missing_repo_names.update(portdb.porttrees)
+			repos = portdb.getRepositories()
+			for r in repos:
+				missing_repo_names.discard(portdb.getRepositoryPath(r))
+			if portdb.porttree_root in missing_repo_names and \
+				not os.path.exists(os.path.join(
+				portdb.porttree_root, "profiles")):
+				# This is normal if $PORTDIR happens to be empty,
+				# so don't warn about it.
+				missing_repo_names.remove(portdb.porttree_root)
+
+	if missing_repo_names:
+		msg = []
+		msg.append("WARNING: One or more repositories " + \
+			"have missing repo_name entries:")
+		msg.append("")
+		for p in missing_repo_names:
+			msg.append("\t%s/profiles/repo_name" % (p,))
+		msg.append("")
+		msg.extend(textwrap.wrap("NOTE: Each repo_name entry " + \
+			"should be a plain text file containing a unique " + \
+			"name for the repository on the first line.", 70))
+		writemsg_level("".join("%s\n" % l for l in msg),
+			level=logging.WARNING, noiselevel=-1)
+
+	return bool(missing_repo_names)
+
+def repo_name_duplicate_check(trees):
+	ignored_repos = {}
+	for root, root_trees in trees.iteritems():
+		if 'porttree' in root_trees:
+			portdb = root_trees['porttree'].dbapi
+			if portdb.mysettings.get('PORTAGE_REPO_DUPLICATE_WARN') != '0':
+				for repo_name, paths in portdb._ignored_repos:
+					k = (root, repo_name, portdb.getRepositoryPath(repo_name))
+					ignored_repos.setdefault(k, []).extend(paths)
+
+	if ignored_repos:
+		msg = []
+		msg.append('WARNING: One or more repositories ' + \
+			'have been ignored due to duplicate')
+		msg.append('  profiles/repo_name entries:')
+		msg.append('')
+		for k in sorted(ignored_repos):
+			msg.append('  %s overrides' % (k,))
+			for path in ignored_repos[k]:
+				msg.append('    %s' % (path,))
+			msg.append('')
+		msg.extend('  ' + x for x in textwrap.wrap(
+			"All profiles/repo_name entries must be unique in order " + \
+			"to avoid having duplicates ignored. " + \
+			"Set PORTAGE_REPO_DUPLICATE_WARN=\"0\" in " + \
+			"/etc/make.conf if you would like to disable this warning."))
+		writemsg_level(''.join('%s\n' % l for l in msg),
+			level=logging.WARNING, noiselevel=-1)
+
+	return bool(ignored_repos)
+
+def config_protect_check(trees):
+	for root, root_trees in trees.iteritems():
+		if not root_trees["root_config"].settings.get("CONFIG_PROTECT"):
+			msg = "!!! CONFIG_PROTECT is empty"
+			if root != "/":
+				msg += " for '%s'" % root
+			writemsg_level(msg, level=logging.WARN, noiselevel=-1)
+
+def profile_check(trees, myaction, myopts):
+	if myaction in ("info", "sync"):
+		return os.EX_OK
+	elif "--version" in myopts or "--help" in myopts:
+		return os.EX_OK
+	for root, root_trees in trees.iteritems():
+		if root_trees["root_config"].settings.profiles:
+			continue
+		# generate some profile related warning messages
+		validate_ebuild_environment(trees)
+		msg = "If you have just changed your profile configuration, you " + \
+			"should revert back to the previous configuration. Due to " + \
+			"your current profile being invalid, allowed actions are " + \
+			"limited to --help, --info, --sync, and --version."
+		writemsg_level("".join("!!! %s\n" % l for l in textwrap.wrap(msg, 70)),
+			level=logging.ERROR, noiselevel=-1)
+		return 1
+	return os.EX_OK
+
+def emerge_main():
+	global portage	# NFC why this is necessary now - genone
+	portage._disable_legacy_globals()
+	# Disable color until we're sure that it should be enabled (after
+	# EMERGE_DEFAULT_OPTS has been parsed).
+	portage.output.havecolor = 0
+	# This first pass is just for options that need to be known as early as
+	# possible, such as --config-root.  They will be parsed again later,
+	# together with EMERGE_DEFAULT_OPTS (which may vary depending on the
+	# the value of --config-root).
+	myaction, myopts, myfiles = parse_opts(sys.argv[1:], silent=True)
+	if "--debug" in myopts:
+		os.environ["PORTAGE_DEBUG"] = "1"
+	if "--config-root" in myopts:
+		os.environ["PORTAGE_CONFIGROOT"] = myopts["--config-root"]
+	if "--root" in myopts:
+		os.environ["ROOT"] = myopts["--root"]
+
+	# Portage needs to ensure a sane umask for the files it creates.
+	os.umask(022)
+	settings, trees, mtimedb = load_emerge_config()
+	portdb = trees[settings["ROOT"]]["porttree"].dbapi
+	rval = profile_check(trees, myaction, myopts)
+	if rval != os.EX_OK:
+		return rval
+
+	if portage._global_updates(trees, mtimedb["updates"]):
+		mtimedb.commit()
+		# Reload the whole config from scratch.
+		settings, trees, mtimedb = load_emerge_config(trees=trees)
+		portdb = trees[settings["ROOT"]]["porttree"].dbapi
+
+	xterm_titles = "notitles" not in settings.features
+
+	tmpcmdline = []
+	if "--ignore-default-opts" not in myopts:
+		tmpcmdline.extend(settings["EMERGE_DEFAULT_OPTS"].split())
+	tmpcmdline.extend(sys.argv[1:])
+	myaction, myopts, myfiles = parse_opts(tmpcmdline)
+
+	if "--digest" in myopts:
+		os.environ["FEATURES"] = os.environ.get("FEATURES","") + " digest"
+		# Reload the whole config from scratch so that the portdbapi internal
+		# config is updated with new FEATURES.
+		settings, trees, mtimedb = load_emerge_config(trees=trees)
+		portdb = trees[settings["ROOT"]]["porttree"].dbapi
+
+	for myroot in trees:
+		mysettings =  trees[myroot]["vartree"].settings
+		mysettings.unlock()
+		adjust_config(myopts, mysettings)
+		if '--pretend' not in myopts and myaction in \
+			(None, 'clean', 'depclean', 'prune', 'unmerge'):
+			mysettings["PORTAGE_COUNTER_HASH"] = \
+				trees[myroot]["vartree"].dbapi._counter_hash()
+			mysettings.backup_changes("PORTAGE_COUNTER_HASH")
+		mysettings.lock()
+		del myroot, mysettings
+
+	apply_priorities(settings)
+
+	spinner = stdout_spinner()
+	if "candy" in settings.features:
+		spinner.update = spinner.update_scroll
+
+	if "--quiet" not in myopts:
+		portage.deprecated_profile_check(settings=settings)
+		repo_name_check(trees)
+		repo_name_duplicate_check(trees)
+		config_protect_check(trees)
+
+	for mytrees in trees.itervalues():
+		mydb = mytrees["porttree"].dbapi
+		# Freeze the portdbapi for performance (memoize all xmatch results).
+		mydb.freeze()
+	del mytrees, mydb
+
+	if "moo" in myfiles:
+		print """
+
+  Larry loves Gentoo (""" + platform.system() + """)
+
+ _______________________
+< Have you mooed today? >
+ -----------------------
+        \   ^__^
+         \  (oo)\_______
+            (__)\       )\/\ 
+                ||----w |
+                ||     ||
+
+"""
+
+	for x in myfiles:
+		ext = os.path.splitext(x)[1]
+		if (ext == ".ebuild" or ext == ".tbz2") and os.path.exists(os.path.abspath(x)):
+			print colorize("BAD", "\n*** emerging by path is broken and may not always work!!!\n")
+			break
+
+	root_config = trees[settings["ROOT"]]["root_config"]
+	if myaction == "list-sets":
+		sys.stdout.write("".join("%s\n" % s for s in sorted(root_config.sets)))
+		sys.stdout.flush()
+		return os.EX_OK
+
+	# only expand sets for actions taking package arguments
+	oldargs = myfiles[:]
+	if myaction in ("clean", "config", "depclean", "info", "prune", "unmerge", None):
+		myfiles, retval = expand_set_arguments(myfiles, myaction, root_config)
+		if retval != os.EX_OK:
+			return retval
+
+		# Need to handle empty sets specially, otherwise emerge will react 
+		# with the help message for empty argument lists
+		if oldargs and not myfiles:
+			print "emerge: no targets left after set expansion"
+			return 0
+
+	if ("--tree" in myopts) and ("--columns" in myopts):
+		print "emerge: can't specify both of \"--tree\" and \"--columns\"."
+		return 1
+
+	if ("--quiet" in myopts):
+		spinner.update = spinner.update_quiet
+		portage.util.noiselimit = -1
+
+	# Always create packages if FEATURES=buildpkg
+	# Imply --buildpkg if --buildpkgonly
+	if ("buildpkg" in settings.features) or ("--buildpkgonly" in myopts):
+		if "--buildpkg" not in myopts:
+			myopts["--buildpkg"] = True
+
+	# Always try and fetch binary packages if FEATURES=getbinpkg
+	if ("getbinpkg" in settings.features):
+		myopts["--getbinpkg"] = True
+
+	if "--buildpkgonly" in myopts:
+		# --buildpkgonly will not merge anything, so
+		# it cancels all binary package options.
+		for opt in ("--getbinpkg", "--getbinpkgonly",
+			"--usepkg", "--usepkgonly"):
+			myopts.pop(opt, None)
+
+	if "--fetch-all-uri" in myopts:
+		myopts["--fetchonly"] = True
+
+	if "--skipfirst" in myopts and "--resume" not in myopts:
+		myopts["--resume"] = True
+
+	if ("--getbinpkgonly" in myopts) and not ("--usepkgonly" in myopts):
+		myopts["--usepkgonly"] = True
+
+	if ("--getbinpkgonly" in myopts) and not ("--getbinpkg" in myopts):
+		myopts["--getbinpkg"] = True
+
+	if ("--getbinpkg" in myopts) and not ("--usepkg" in myopts):
+		myopts["--usepkg"] = True
+
+	# Also allow -K to apply --usepkg/-k
+	if ("--usepkgonly" in myopts) and not ("--usepkg" in myopts):
+		myopts["--usepkg"] = True
+
+	# Allow -p to remove --ask
+	if "--pretend" in myopts:
+		myopts.pop("--ask", None)
+
+	# forbid --ask when not in a terminal
+	# note: this breaks `emerge --ask | tee logfile`, but that doesn't work anyway.
+	if ("--ask" in myopts) and (not sys.stdin.isatty()):
+		portage.writemsg("!!! \"--ask\" should only be used in a terminal. Exiting.\n",
+			noiselevel=-1)
+		return 1
+
+	if settings.get("PORTAGE_DEBUG", "") == "1":
+		spinner.update = spinner.update_quiet
+		portage.debug=1
+		if "python-trace" in settings.features:
+			import portage.debug
+			portage.debug.set_trace(True)
+
+	if not ("--quiet" in myopts):
+		if not sys.stdout.isatty() or ("--nospinner" in myopts):
+			spinner.update = spinner.update_basic
+
+	if myaction == 'version':
+		print getportageversion(settings["PORTDIR"], settings["ROOT"],
+			settings.profile_path, settings["CHOST"],
+			trees[settings["ROOT"]]["vartree"].dbapi)
+		return 0
+	elif "--help" in myopts:
+		_emerge.help.help(myaction, myopts, portage.output.havecolor)
+		return 0
+
+	if "--debug" in myopts:
+		print "myaction", myaction
+		print "myopts", myopts
+
+	if not myaction and not myfiles and "--resume" not in myopts:
+		_emerge.help.help(myaction, myopts, portage.output.havecolor)
+		return 1
+
+	pretend = "--pretend" in myopts
+	fetchonly = "--fetchonly" in myopts or "--fetch-all-uri" in myopts
+	buildpkgonly = "--buildpkgonly" in myopts
+
+	# check if root user is the current user for the actions where emerge needs this
+	if portage.secpass < 2:
+		# We've already allowed "--version" and "--help" above.
+		if "--pretend" not in myopts and myaction not in ("search","info"):
+			need_superuser = myaction in ('clean', 'depclean', 'deselect',
+				'prune', 'unmerge') or not \
+				(fetchonly or \
+				(buildpkgonly and secpass >= 1) or \
+				myaction in ("metadata", "regen") or \
+				(myaction == "sync" and os.access(settings["PORTDIR"], os.W_OK)))
+			if portage.secpass < 1 or \
+				need_superuser:
+				if need_superuser:
+					access_desc = "superuser"
+				else:
+					access_desc = "portage group"
+				# Always show portage_group_warning() when only portage group
+				# access is required but the user is not in the portage group.
+				from portage.data import portage_group_warning
+				if "--ask" in myopts:
+					myopts["--pretend"] = True
+					del myopts["--ask"]
+					print ("%s access is required... " + \
+						"adding --pretend to options\n") % access_desc
+					if portage.secpass < 1 and not need_superuser:
+						portage_group_warning()
+				else:
+					sys.stderr.write(("emerge: %s access is required\n") \
+						% access_desc)
+					if portage.secpass < 1 and not need_superuser:
+						portage_group_warning()
+					return 1
+
+	disable_emergelog = False
+	for x in ("--pretend", "--fetchonly", "--fetch-all-uri"):
+		if x in myopts:
+			disable_emergelog = True
+			break
+	if myaction in ("search", "info"):
+		disable_emergelog = True
+	if disable_emergelog:
+		""" Disable emergelog for everything except build or unmerge
+		operations.  This helps minimize parallel emerge.log entries that can
+		confuse log parsers.  We especially want it disabled during
+		parallel-fetch, which uses --resume --fetchonly."""
+		global emergelog
+		def emergelog(*pargs, **kargs):
+			pass
+
+	else:
+		if 'EMERGE_LOG_DIR' in settings:
+			try:
+				# At least the parent needs to exist for the lock file.
+				portage.util.ensure_dirs(settings['EMERGE_LOG_DIR'])
+			except portage.exception.PortageException, e:
+				writemsg_level("!!! Error creating directory for " + \
+					"EMERGE_LOG_DIR='%s':\n!!! %s\n" % \
+					(settings['EMERGE_LOG_DIR'], e),
+					noiselevel=-1, level=logging.ERROR)
+			else:
+				global _emerge_log_dir
+				_emerge_log_dir = settings['EMERGE_LOG_DIR']
+
+	if not "--pretend" in myopts:
+		emergelog(xterm_titles, "Started emerge on: "+\
+			time.strftime("%b %d, %Y %H:%M:%S", time.localtime()))
+		myelogstr=""
+		if myopts:
+			myelogstr=" ".join(myopts)
+		if myaction:
+			myelogstr+=" "+myaction
+		if myfiles:
+			myelogstr += " " + " ".join(oldargs)
+		emergelog(xterm_titles, " *** emerge " + myelogstr)
+	del oldargs
+
+	def emergeexitsig(signum, frame):
+		signal.signal(signal.SIGINT, signal.SIG_IGN)
+		signal.signal(signal.SIGTERM, signal.SIG_IGN)
+		portage.util.writemsg("\n\nExiting on signal %(signal)s\n" % {"signal":signum})
+		sys.exit(100+signum)
+	signal.signal(signal.SIGINT, emergeexitsig)
+	signal.signal(signal.SIGTERM, emergeexitsig)
+
+	def emergeexit():
+		"""This gets out final log message in before we quit."""
+		if "--pretend" not in myopts:
+			emergelog(xterm_titles, " *** terminating.")
+		if "notitles" not in settings.features:
+			xtermTitleReset()
+	portage.atexit_register(emergeexit)
+
+	if myaction in ("config", "metadata", "regen", "sync"):
+		if "--pretend" in myopts:
+			sys.stderr.write(("emerge: The '%s' action does " + \
+				"not support '--pretend'.\n") % myaction)
+			return 1
+
+	if "sync" == myaction:
+		return action_sync(settings, trees, mtimedb, myopts, myaction)
+	elif "metadata" == myaction:
+		action_metadata(settings, portdb, myopts)
+	elif myaction=="regen":
+		validate_ebuild_environment(trees)
+		return action_regen(settings, portdb, myopts.get("--jobs"),
+			myopts.get("--load-average"))
+	# HELP action
+	elif "config"==myaction:
+		validate_ebuild_environment(trees)
+		action_config(settings, trees, myopts, myfiles)
+
+	# SEARCH action
+	elif "search"==myaction:
+		validate_ebuild_environment(trees)
+		action_search(trees[settings["ROOT"]]["root_config"],
+			myopts, myfiles, spinner)
+
+	elif myaction in ('clean', 'depclean', 'deselect', 'prune', 'unmerge'):
+		validate_ebuild_environment(trees)
+		rval = action_uninstall(settings, trees, mtimedb["ldpath"],
+			myopts, myaction, myfiles, spinner)
+		if not (myaction == 'deselect' or buildpkgonly or fetchonly or pretend):
+			post_emerge(root_config, myopts, mtimedb, rval)
+		return rval
+
+	elif myaction == 'info':
+
+		# Ensure atoms are valid before calling unmerge().
+		vardb = trees[settings["ROOT"]]["vartree"].dbapi
+		valid_atoms = []
+		for x in myfiles:
+			if is_valid_package_atom(x):
+				try:
+					valid_atoms.append(
+						portage.dep_expand(x, mydb=vardb, settings=settings))
+				except portage.exception.AmbiguousPackageName, e:
+					msg = "The short ebuild name \"" + x + \
+						"\" is ambiguous.  Please specify " + \
+						"one of the following " + \
+						"fully-qualified ebuild names instead:"
+					for line in textwrap.wrap(msg, 70):
+						writemsg_level("!!! %s\n" % (line,),
+							level=logging.ERROR, noiselevel=-1)
+					for i in e[0]:
+						writemsg_level("    %s\n" % colorize("INFORM", i),
+							level=logging.ERROR, noiselevel=-1)
+					writemsg_level("\n", level=logging.ERROR, noiselevel=-1)
+					return 1
+				continue
+			msg = []
+			msg.append("'%s' is not a valid package atom." % (x,))
+			msg.append("Please check ebuild(5) for full details.")
+			writemsg_level("".join("!!! %s\n" % line for line in msg),
+				level=logging.ERROR, noiselevel=-1)
+			return 1
+
+		return action_info(settings, trees, myopts, valid_atoms)
+
+	# "update", "system", or just process files:
+	else:
+		validate_ebuild_environment(trees)
+
+		for x in myfiles:
+			if x.startswith(SETPREFIX) or \
+				is_valid_package_atom(x):
+				continue
+			if x[:1] == os.sep:
+				continue
+			try:
+				os.lstat(x)
+				continue
+			except OSError:
+				pass
+			msg = []
+			msg.append("'%s' is not a valid package atom." % (x,))
+			msg.append("Please check ebuild(5) for full details.")
+			writemsg_level("".join("!!! %s\n" % line for line in msg),
+				level=logging.ERROR, noiselevel=-1)
+			return 1
+
+		if "--pretend" not in myopts:
+			display_news_notification(root_config, myopts)
+		retval = action_build(settings, trees, mtimedb,
+			myopts, myaction, myfiles, spinner)
+		root_config = trees[settings["ROOT"]]["root_config"]
+		post_emerge(root_config, myopts, mtimedb, retval)
+
+		return retval