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# Copyright 2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
from itertools import chain
import shutil
import tempfile
import portage
from portage import os
from portage.dbapi.vartree import vartree
from portage.dbapi.porttree import portagetree
from portage.dbapi.bintree import binarytree
from portage.dep import Atom
from portage.package.ebuild.config import config
from portage.sets import load_default_config
from portage.versions import catsplit
from _emerge.Blocker import Blocker
from _emerge.create_depgraph_params import create_depgraph_params
from _emerge.depgraph import backtrack_depgraph
from _emerge.RootConfig import RootConfig
class ResolverPlayground(object):
"""
This class help to create the necessary files on disk and
the needed settings instances, etc. for the resolver to do
it's work.
"""
def __init__(self, ebuilds={}, installed={}, profile={}):
"""
ebuilds: cpv -> metadata mapping simulating avaiable ebuilds.
installed: cpv -> metadata mapping simulating installed packages.
If a metadata key is missing, it gets a default value.
profile: settings defined by the profile.
"""
self.root = tempfile.mkdtemp() + os.path.sep
self.portdir = os.path.join(self.root, "usr/portage")
self.vdbdir = os.path.join(self.root, "var/db/pkg")
os.makedirs(self.portdir)
os.makedirs(self.vdbdir)
self._create_ebuilds(ebuilds)
self._create_installed(installed)
self._create_profile(ebuilds, installed, profile)
self.settings, self.trees = self._load_config()
self._create_ebuild_manifests(ebuilds)
def _create_ebuilds(self, ebuilds):
for cpv in ebuilds:
a = Atom("=" + cpv)
ebuild_dir = os.path.join(self.portdir, a.cp)
ebuild_path = os.path.join(ebuild_dir, a.cpv.split("/")[1] + ".ebuild")
try:
os.makedirs(ebuild_dir)
except os.error:
pass
metadata = ebuilds[cpv]
eapi = metadata.get("EAPI", 0)
slot = metadata.get("SLOT", 0)
keywords = metadata.get("KEYWORDS", "x86")
iuse = metadata.get("IUSE", "")
depend = metadata.get("DEPEND", "")
rdepend = metadata.get("RDEPEND", None)
pdepend = metadata.get("PDEPEND", None)
f = open(ebuild_path, "w")
f.write('EAPI="' + str(eapi) + '"\n')
f.write('SLOT="' + str(slot) + '"\n')
f.write('KEYWORDS="' + str(keywords) + '"\n')
f.write('IUSE="' + str(iuse) + '"\n')
f.write('DEPEND="' + str(depend) + '"\n')
if rdepend is not None:
f.write('RDEPEND="' + str(rdepend) + '"\n')
if rdepend is not None:
f.write('PDEPEND="' + str(pdepend) + '"\n')
f.close()
def _create_ebuild_manifests(self, ebuilds):
for cpv in ebuilds:
a = Atom("=" + cpv)
ebuild_dir = os.path.join(self.portdir, a.cp)
ebuild_path = os.path.join(ebuild_dir, a.cpv.split("/")[1] + ".ebuild")
portage.util.noiselimit = -1
tmpsettings = config(clone=self.settings)
portdb = self.trees[self.root]["porttree"].dbapi
portage.doebuild(ebuild_path, "digest", self.root, tmpsettings,
tree="porttree", mydbapi=portdb)
portage.util.noiselimit = 0
def _create_installed(self, installed):
for cpv in installed:
a = Atom("=" + cpv)
vdb_pkg_dir = os.path.join(self.vdbdir, a.cpv)
try:
os.makedirs(vdb_pkg_dir)
except os.error:
pass
metadata = installed[cpv]
eapi = metadata.get("EAPI", 0)
slot = metadata.get("SLOT", 0)
keywords = metadata.get("KEYWORDS", "~x86")
iuse = metadata.get("IUSE", "")
use = metadata.get("USE", "")
depend = metadata.get("DEPEND", "")
rdepend = metadata.get("RDEPEND", None)
pdepend = metadata.get("PDEPEND", None)
def write_key(key, value):
f = open(os.path.join(vdb_pkg_dir, key), "w")
f.write(str(value) + "\n")
f.close()
write_key("EAPI", eapi)
write_key("SLOT", slot)
write_key("KEYWORDS", keywords)
write_key("IUSE", iuse)
write_key("USE", use)
write_key("DEPEND", depend)
if rdepend is not None:
write_key("RDEPEND", rdepend)
if rdepend is not None:
write_key("PDEPEND", pdepend)
def _create_profile(self, ebuilds, installed, profile):
#Create $PORTDIR/profiles/categories
categories = set()
for cpv in chain(ebuilds.keys(), installed.keys()):
categories.add(catsplit(cpv)[0])
profile_dir = os.path.join(self.portdir, "profiles")
try:
os.makedirs(profile_dir)
except os.error:
pass
categories_file = os.path.join(profile_dir, "categories")
f = open(categories_file, "w")
for cat in categories:
f.write(cat + "\n")
f.close()
#Create $PORTDIR/eclass (we fail to digest the ebuilds if it's not there)
os.makedirs(os.path.join(self.portdir, "eclass"))
if profile:
#This is meant to allow the consumer to set up his own profile,
#with package.mask and what not.
raise NotImplentedError()
def _load_config(self):
env = { "PORTDIR": self.portdir, "ROOT": self.root, "ACCEPT_KEYWORDS": "x86"}
settings = config(config_root=self.root, target_root=self.root, local_config=False, env=env)
settings.lock()
trees = {
self.root: {
"virtuals": settings.getvirtuals(),
"vartree": vartree(self.root, categories=settings.categories, settings=settings),
"porttree": portagetree(self.root, settings=settings),
"bintree": binarytree(self.root, os.path.join(self.root, "usr/portage/packages"), settings=settings)
}
}
for root, root_trees in trees.items():
settings = root_trees["vartree"].settings
settings._init_dirs()
setconfig = load_default_config(settings, root_trees)
root_trees["root_config"] = RootConfig(settings, root_trees, setconfig)
return settings, trees
def run(self, myfiles, myopts={}, myaction=None):
myopts["--pretend"] = True
myopts["--quiet"] = True
myopts["--root"] = self.root
myopts["--config-root"] = self.root
myopts["--root-deps"] = "rdeps"
# Add a fake _test_ option that can be used for
# conditional test code.
myopts["_test_"] = True
portage.util.noiselimit = -2
myparams = create_depgraph_params(myopts, myaction)
success, mydepgraph, favorites = backtrack_depgraph(
self.settings, self.trees, myopts, myparams, myaction, myfiles, None)
result = ResolverPlaygroundResult(success, mydepgraph, favorites)
portage.util.noiselimit = 0
return result
def cleanup(self):
shutil.rmtree(self.root)
class ResolverPlaygroundResult(object):
def __init__(self, success, mydepgraph, favorites):
self.success = success
self.depgraph = mydepgraph
self.favorites = favorites
self.mergelist = None
self.use_changes = None
if self.depgraph._dynamic_config._serialized_tasks_cache is not None:
self.mergelist = []
for x in self.depgraph._dynamic_config._serialized_tasks_cache:
if isinstance(x, Blocker):
self.mergelist.append(x.atom)
else:
self.mergelist.append(x.cpv)
if self.depgraph._dynamic_config._needed_use_config_changes:
self.use_changes = {}
for pkg, needed_use_config_changes in \
self.depgraph._dynamic_config._needed_use_config_changes.items():
new_use, changes = needed_use_config_changes
self.use_changes[pkg.cpv] = changes
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