How to use portage - 10 common examples

def gen_label(base, label):
	"""if supplied label is a path, generate a unique label based upon label, and supplied base path"""
	if label.find(os.path.sep) == -1:
		return label
	label = label.strip("\"").strip("'")
	label = os.path.join(*(label.rstrip(os.path.sep).split(os.path.sep)))
	tail = os.path.split(label)[1]
	return "%s-%X" % (tail, abs(label.__hash__()))

if x.startswith(".") or x.endswith("~") or x.endswith(".bak"):
			continue
		templist.append(x)
	fns = templist
	del templist

	space_separated = set(["CONFIG_PROTECT", "CONFIG_PROTECT_MASK"])
	colon_separated = set(["ADA_INCLUDE_PATH", "ADA_OBJECTS_PATH",
		"CLASSPATH", "INFODIR", "INFOPATH", "KDEDIRS", "LDPATH", "MANPATH",
		  "PATH", "PKG_CONFIG_PATH", "PRELINK_PATH", "PRELINK_PATH_MASK",
		  "PYTHONPATH", "ROOTPATH"])

	config_list = []

	for x in fns:
		file_path = os.path.join(envd_dir, x)
		try:
			myconfig = getconfig(file_path, expand=False)
		except ParseError as e:
			writemsg("!!! '%s'\n" % str(e), noiselevel=-1)
			del e
			continue
		if myconfig is None:
			# broken symlink or file removed by a concurrent process
			writemsg("!!! File Not Found: '%s'\n" % file_path, noiselevel=-1)
			continue

		config_list.append(myconfig)
		if "SPACE_SEPARATED" in myconfig:
			space_separated.update(myconfig["SPACE_SEPARATED"].split())
			del myconfig["SPACE_SEPARATED"]
		if "COLON_SEPARATED" in myconfig:

dodir(destdir)
			dofile(fullpath, os.path.join(destdir, basename))
		elif warn_on_skipped_files and ext not in unwarned_skipped_extensions and basename not in unwarned_skipped_files:
			skipped_files.append(fullpath)
	elif options.recurse and os.path.isdir(fullpath) and \
	     basename not in options.disallowed_dirs:
		for i in _os.listdir(_unicode_encode(fullpath)):
			try:
				i = _unicode_decode(i, errors='strict')
			except UnicodeDecodeError:
				writemsg('dohtml: argument is not encoded as UTF-8: %s\n' %
					_unicode_decode(i), noiselevel=-1)
				sys.exit(1)
			pfx = basename
			if prefix:
				pfx = os.path.join(prefix, pfx)
			install(i, dirname, options, pfx)
	elif not options.recurse and os.path.isdir(fullpath):
		global skipped_directories
		skipped_directories.append(fullpath)
		return False
	else:
		return False
	return True

inst_gid = int(mysettings["PORTAGE_INST_GID"])

	_preinst_bsdflags(mysettings)

	destdir = mysettings["D"]
	ed_len = len(mysettings["ED"])
	unicode_errors = []
	desktop_file_validate = \
		portage.process.find_binary("desktop-file-validate") is not None
	xdg_dirs = mysettings.get('XDG_DATA_DIRS', '/usr/share').split(':')
	xdg_dirs = tuple(os.path.join(i, "applications") + os.sep
		for i in xdg_dirs if i)

	qa_desktop_file = ""
	try:
		with io.open(_unicode_encode(os.path.join(
			mysettings["PORTAGE_BUILDDIR"],
			"build-info", "QA_DESKTOP_FILE"),
			encoding=_encodings['fs'], errors='strict'),
			mode='r', encoding=_encodings['repo.content'],
			errors='replace') as f:
			qa_desktop_file = f.read()
	except IOError as e:
		if e.errno not in (errno.ENOENT, errno.ESTALE):
			raise

	qa_desktop_file = qa_desktop_file.split()
	if qa_desktop_file:
		if len(qa_desktop_file) > 1:
			qa_desktop_file = "|".join("(%s)" % x for x in qa_desktop_file)
			qa_desktop_file = "^(%s)$" % qa_desktop_file
		else:

def scan_pkgs(self, can_force):
		for xpkg in self.effective_scanlist:
			xpkg_continue = False
			# ebuilds and digests added to cvs respectively.
			logging.info("checking package %s", xpkg)
			# save memory by discarding xmatch caches from previous package(s)
			self.caches['arch_xmatch'].clear()
			catdir, pkgdir = xpkg.split("/")
			checkdir = self.repo_settings.repodir + "/" + xpkg
			checkdir_relative = ""
			if self.repolevel < 3:
				checkdir_relative = os.path.join(pkgdir, checkdir_relative)
			if self.repolevel < 2:
				checkdir_relative = os.path.join(catdir, checkdir_relative)
			checkdir_relative = os.path.join(".", checkdir_relative)

			# Run the status check
			if self.kwargs['checks']['ebuild_notadded']:
				self.vcs_settings.status.check(checkdir, checkdir_relative, xpkg)

			if self.generate_manifest:
				if not manifest.Manifest(**self.kwargs).update_manifest(checkdir):
					self.qatracker.add_error("manifest.bad", os.path.join(xpkg, 'Manifest'))
				if self.options.mode == 'manifest':
					continue
			checkdirlist = os.listdir(checkdir)

			dynamic_data = {
				'changelog_modified': False,
				'checkdirlist': ExtendedFuture(checkdirlist),
				'checkdir': checkdir,

def _chpathtool_exit(self, chpathtool):
		if self._final_exit(chpathtool) != os.EX_OK:
			self._writemsg_level("!!! Error Adjusting Prefix to %s\n" %
				(self.settings["EPREFIX"],),
				noiselevel=-1, level=logging.ERROR)
			self._async_unlock_builddir(returncode=self.returncode)
			return

		# We want to install in "our" prefix, not the binary one
		with io.open(_unicode_encode(os.path.join(self._infloc, "EPREFIX"),
			encoding=_encodings['fs'], errors='strict'), mode='w',
			encoding=_encodings['repo.content'], errors='strict') as f:
			f.write(self.settings["EPREFIX"] + "\n")

		# Move the files to the correct location for merge.
		image_tmp_dir = os.path.join(
			self.settings["PORTAGE_BUILDDIR"], "image_tmp")
		build_d = os.path.join(self.settings["D"],
			self._build_prefix.lstrip(os.sep))
		if not os.path.isdir(build_d):
			# Assume this is a virtual package or something.
			shutil.rmtree(self._image_dir)
			ensure_dirs(self.settings["ED"])
		else:
			os.rename(build_d, image_tmp_dir)
			shutil.rmtree(self._image_dir)
			ensure_dirs(os.path.dirname(self.settings["ED"].rstrip(os.sep)))
			os.rename(image_tmp_dir, self.settings["ED"])

		self.wait()

def validate(self):
		"""Validate miscellaneous settings and display warnings if necessary.
		(This code was previously in the global scope of portage.py)"""

		groups = self.get("ACCEPT_KEYWORDS", "").split()
		archlist = self.archlist()
		if not archlist:
			writemsg(_("--- 'profiles/arch.list' is empty or "
				"not available. Empty ebuild repository?\n"), noiselevel=1)
		else:
			for group in groups:
				if group not in archlist and \
					not (group.startswith("-") and group[1:] in archlist) and \
					group not in ("*", "~*", "**"):
					writemsg(_("!!! INVALID ACCEPT_KEYWORDS: %s\n") % str(group),
						noiselevel=-1)

		profile_broken = False

		# getmaskingstatus requires ARCH for ACCEPT_KEYWORDS support
		arch = self.get('ARCH')
		if not self.profile_path or not arch:
			profile_broken = True
		else:
			# If any one of these files exists, then
			# the profile is considered valid.
			for x in ("make.defaults", "parent",
				"packages", "use.force", "use.mask"):
				if exists_raise_eaccess(os.path.join(self.profile_path, x)):
					break
			else:

# start with either 'ro' or 'rw'
				# example line:
				# 14 1 8:3 / / rw,noatime - ext3 /dev/root rw,errors=continue,commit=5,barrier=1,data=writeback
				#       _dir ^ ^ attr1                     ^ attr2
				# there can be a variable number of fields
				# to the left of the ' - ', after the attr's, so split it there
				mount = line.split(' - ', 1)
				_dir, attr1 = mount[0].split()[4:6]
				attr2 = mount[1].split()[2]
				if attr1.startswith('ro') or attr2.startswith('ro'):
					ro_filesystems.add(_dir)

	# If /proc/self/mountinfo can't be read, assume that there are no RO
	# filesystems and return.
	except EnvironmentError:
		writemsg_level(_("!!! /proc/self/mountinfo cannot be read"),
			level=logging.WARNING, noiselevel=-1)
		return []

	ro_devs = {}
	for x in ro_filesystems:
		try:
			ro_devs[os.stat(x).st_dev] = x
		except OSError:
			pass

	ro_filesystems.clear()
	for x in set(dir_list):
		try:
			dev = os.stat(x).st_dev
		except OSError:
			pass

try:
					error_msg = str(e)
				except UnicodeDecodeError as uerror:
					error_msg = str(uerror.object,
						encoding='utf_8', errors='replace')
				writemsg("!!! %s\n\n" % error_msg)
				del e
				pkgindex = None
			if proc is not None:
				if proc.poll() is None:
					proc.kill()
					proc.wait()
				proc = None
			if tmp_filename is not None:
				try:
					os.unlink(tmp_filename)
				except OSError:
					pass
			if pkgindex is rmt_idx:
				pkgindex.modified = False # don't update the header
				pkgindex.header["DOWNLOAD_TIMESTAMP"] = "%d" % time.time()
				try:
					ensure_dirs(os.path.dirname(pkgindex_file))
					f = atomic_ofstream(pkgindex_file)
					pkgindex.write(f)
					f.close()
				except (IOError, PortageException):
					if os.access(os.path.dirname(pkgindex_file), os.W_OK):
						raise
					# The current user doesn't have permission to cache the
					# file, but that's alright.
			if pkgindex:

def _calc_changelog(ebuildpath,current,next): # pylint: disable=redefined-builtin
	if ebuildpath == None or not os.path.exists(ebuildpath):
		return []
	current = '-'.join(catpkgsplit(current)[1:])
	if current.endswith('-r0'):
		current = current[:-3]
	next = '-'.join(catpkgsplit(next)[1:])
	if next.endswith('-r0'):
		next = next[:-3]

	changelogdir = os.path.dirname(ebuildpath)
	changelogs = ['ChangeLog']
	# ChangeLog-YYYY (see bug #389611)
	changelogs.extend(sorted((fn for fn in os.listdir(changelogdir)
		if fn.startswith('ChangeLog-')), reverse=True))

	divisions = []
	found_current = False
	for fn in changelogs:
		changelogpath = os.path.join(changelogdir, fn)
		try:
			with io.open(_unicode_encode(changelogpath,
				encoding=_encodings['fs'], errors='strict'),
				mode='r', encoding=_encodings['repo.content'],
				errors='replace') as f:
				changelog = f.read()
		except EnvironmentError:
			return []
		for node in _find_changelog_tags(changelog):
			if node[0] == current: