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# Utilities for layerindex-web
#
# Copyright (C) 2013 Intel Corporation
# Author: Paul Eggleton <paul.eggleton@linux.intel.com>
#
# Licensed under the MIT license, see COPYING.MIT for details
import sys
import os
import tempfile
import subprocess
import logging
import time
import fcntl
import signal
import codecs
def get_branch(branchname):
from layerindex.models import Branch
res = list(Branch.objects.filter(name=branchname)[:1])
if res:
return res[0]
return None
def get_layer(layername):
from layerindex.models import LayerItem
res = list(LayerItem.objects.filter(name=layername)[:1])
if res:
return res[0]
return None
def get_layer_var(config_data, var, logger):
collection = config_data.getVar('BBFILE_COLLECTIONS', True)
if collection:
collection = collection.strip()
collection_list = collection.split()
collection = collection_list[0]
layerdir = config_data.getVar('LAYERDIR', True)
if len(collection_list) > 1:
logger.warn('%s: multiple collections found, handling first one (%s) only' % (layerdir, collection))
if var == 'BBFILE_COLLECTIONS':
return collection
value = config_data.getVar('%s_%s' % (var, collection), True)
if not value:
value = config_data.getVar(var, True)
return value or ''
def is_deps_satisfied(req_col, req_ver, collections):
""" Check whether required collection and version are in collections"""
for existed_col, existed_ver in collections:
if req_col == existed_col:
# If there is no version constraint, return True when collection matches
if not req_ver:
return True
else:
# If there is no version in the found layer, then don't use this layer.
if not existed_ver:
continue
(op, dep_version) = req_ver.split()
success = bb.utils.vercmp_string_op(existed_ver, dep_version, op)
if success:
return True
# Return False when not found
return False
def get_dependency_layer(depname, version_str=None, logger=None):
from layerindex.models import LayerItem, LayerBranch
# Get any LayerBranch with a layer that has a name that matches depmod, or
# a LayerBranch that has the collection name depmod.
res = list(LayerBranch.objects.filter(layer__name=depname)) + \
list(LayerBranch.objects.filter(collection=depname))
# Nothing found, return.
if not res:
return None
# If there is no version constraint, return the first one found.
if not version_str:
return res[0].layer
(operator, dep_version) = version_str.split()
for layerbranch in res:
layer_ver = layerbranch.version
# If there is no version in the found layer, then don't use this layer.
if not layer_ver:
continue
try:
success = bb.utils.vercmp_string_op(layer_ver, version_str, operator)
except bb.utils.VersionStringException as vse:
raise vse
if success:
return layerbranch.layer
return None
def add_dependencies(layerbranch, config_data, logger=None):
_add_dependency("LAYERDEPENDS", 'dependency', layerbranch, config_data, logger=logger)
def add_recommends(layerbranch, config_data, logger=None):
_add_dependency("LAYERRECOMMENDS", 'recommends', layerbranch, config_data, logger=logger, required=False)
def _add_dependency(var, name, layerbranch, config_data, logger=None, required=True):
from layerindex.models import LayerBranch, LayerDependency
layer_name = layerbranch.layer.name
var_name = layer_name
if layerbranch.collection:
var_name = layerbranch.collection
dep_list = config_data.getVar("%s_%s" % (var, var_name), True)
if not dep_list:
return
try:
dep_dict = bb.utils.explode_dep_versions2(dep_list)
except bb.utils.VersionStringException as vse:
logger.debug('Error parsing %s_%s for %s\n%s' % (var, var_name, layer_name, str(vse)))
return
need_remove = LayerDependency.objects.filter(layerbranch=layerbranch).filter(required=required)
for dep, ver_list in list(dep_dict.items()):
ver_str = None
if ver_list:
ver_str = ver_list[0]
try:
dep_layer = get_dependency_layer(dep, ver_str, logger)
except bb.utils.VersionStringException as vse:
if logger:
logger.error('Error getting %s %s for %s\n%s' %(name, dep. layer_name, str(vse)))
continue
# No layer found.
if not dep_layer:
if logger:
logger.error('Cannot resolve %s %s (version %s) for %s' % (name, dep, ver_str, layer_name))
continue
# Preparing to remove obsolete ones
if need_remove:
need_remove = need_remove.exclude(dependency=dep_layer)
# Skip existing entries.
existing = list(LayerDependency.objects.filter(layerbranch=layerbranch).filter(required=required).filter(dependency=dep_layer))
if existing:
logger.debug('Skipping %s - already a dependency for %s' % (dep, layer_name))
continue
if logger:
logger.debug('Adding %s %s to %s' % (name, dep_layer.name, layer_name))
layerdep = LayerDependency()
layerdep.layerbranch = layerbranch
layerdep.dependency = dep_layer
layerdep.required = required
layerdep.save()
if need_remove:
import settings
remove_layer_dependencies = getattr(settings, 'REMOVE_LAYER_DEPENDENCIES', False)
if remove_layer_dependencies:
logger.info('Removing obsolete dependencies "%s" for layer %s' % (need_remove, layer_name))
need_remove.delete()
else:
logger.warn('Dependencies "%s" are not in %s\'s conf/layer.conf' % (need_remove, layer_name))
logger.warn('Either set REMOVE_LAYER_DEPENDENCIES to remove them from the database, or fix conf/layer.conf')
def set_layerbranch_collection_version(layerbranch, config_data, logger=None):
layerbranch.collection = config_data.getVar('BBFILE_COLLECTIONS', True)
ver_str = "LAYERVERSION_"
if layerbranch.collection:
layerbranch.collection = layerbranch.collection.strip()
ver_str += layerbranch.collection
layerbranch.version = config_data.getVar(ver_str, True)
def setup_tinfoil(bitbakepath, enable_tracking, loglevel=None):
sys.path.insert(0, bitbakepath + '/lib')
import bb.tinfoil
import bb.cooker
import bb.data
try:
tinfoil = bb.tinfoil.Tinfoil(tracking=enable_tracking)
except TypeError:
# old API
tinfoil = bb.tinfoil.Tinfoil()
if enable_tracking:
tinfoil.cooker.enableDataTracking()
tinfoil.logger.setLevel(logging.WARNING)
if loglevel:
tinfoil.logger.setLevel(loglevel)
tinfoil.prepare(config_only = True)
return tinfoil
def explode_dep_versions2(bitbakepath, deps):
bblib = bitbakepath + '/lib'
if not bblib in sys.path:
sys.path.insert(0, bblib)
import bb.utils
return bb.utils.explode_dep_versions2(deps)
def checkout_repo(repodir, commit, logger, force=False):
"""
Check out a revision in a repository, ensuring that untracked/uncommitted
files don't get in the way.
WARNING: this will throw away any untracked/uncommitted files in the repo,
so it is only suitable for use with repos where you don't care about such
things (which we don't for the layer repos that we use)
"""
if force:
currentref = ''
else:
try:
# The "git rev-parse HEAD" returns "fatal: ambiguous argument 'HEAD'"
# when a repo is unable to check out after git clone:
# git clone <url>
# warning: remote HEAD refers to nonexistent ref, unable to checkout.
# So check and avoid that
currentref = runcmd("git rev-parse HEAD", repodir, logger=logger).strip()
except Exception as esc:
logger.warn(esc)
currentref = ''
if currentref != commit:
# Reset in case there are added but uncommitted changes
runcmd("git reset --hard", repodir, logger=logger)
# Drop any untracked files in case these cause problems (either because
# they will exist in the revision we're checking out, or will otherwise
# interfere with operation, e.g. stale pyc files)
runcmd("git clean -qdfx", repodir, logger=logger)
# Now check out the revision
runcmd("git checkout %s" % commit, repodir, logger=logger)
def checkout_layer_branch(layerbranch, repodir, logger=None):
branchname = layerbranch.branch.name
if layerbranch.actual_branch:
branchname = layerbranch.actual_branch
checkout_repo(repodir, 'origin/%s' % branchname, logger)
def is_layer_valid(layerdir):
conf_file = os.path.join(layerdir, "conf", "layer.conf")
if not os.path.isfile(conf_file):
return False
return True
def is_branch_valid(layerdir, branch):
import git
g = git.cmd.Git(layerdir)
assert g.rev_parse('--is-bare-repository') == 'false'
try:
g.rev_parse('--verify', 'origin/%s' % branch)
except git.exc.GitCommandError:
return False
return True
def parse_conf(conf_file, d):
if hasattr(bb.parse, "handle"):
# Newer BitBake
data = bb.parse.handle(conf_file, d, include=True)
else:
# Older BitBake (1.18 and below)
data = bb.cooker._parse(conf_file, d)
return data
def parse_layer_conf(layerdir, data, logger=None):
conf_file = os.path.join(layerdir, "conf", "layer.conf")
if not is_layer_valid(layerdir):
if logger:
logger.error("Cannot find layer.conf: %s"% conf_file)
return
data.setVar('LAYERDIR', str(layerdir))
data = parse_conf(conf_file, data)
data.expandVarref('LAYERDIR')
def runcmd(cmd, destdir=None, printerr=True, logger=None):
"""
execute command, raise CalledProcessError if fail
return output if succeed
"""
if logger:
logger.debug("run cmd '%s' in %s" % (cmd, os.getcwd() if destdir is None else destdir))
out = tempfile.TemporaryFile()
try:
subprocess.check_call(cmd, stdout=out, stderr=out, cwd=destdir, shell=True)
except subprocess.CalledProcessError as e:
out.seek(0)
output = out.read()
output = output.decode('utf-8', errors='replace').strip()
if printerr:
if logger:
logger.error("%s" % output)
else:
sys.stderr.write("%s\n" % output)
e.output = output
raise e
out.seek(0)
output = out.read()
output = output.decode('utf-8', errors='replace').strip()
if logger:
logger.debug("output: %s" % output.rstrip() )
return output
def setup_django():
import django
# Get access to our Django model
newpath = os.path.abspath(os.path.dirname(__file__) + '/..')
sys.path.append(newpath)
os.environ['DJANGO_SETTINGS_MODULE'] = 'settings'
django.setup()
def logger_create(name):
logger = logging.getLogger(name)
loggerhandler = logging.StreamHandler()
loggerhandler.setFormatter(logging.Formatter("%(levelname)s: %(message)s"))
logger.addHandler(loggerhandler)
logger.setLevel(logging.INFO)
return logger
class ListHandler(logging.Handler):
"""Logging handler which accumulates formatted log records in a list, returning the list on demand"""
def __init__(self):
self.log = []
logging.Handler.__init__(self, logging.WARNING)
def emit(self, record):
self.log.append('%s\n' % self.format(record))
def read(self):
log = self.log
self.log = []
return log
def lock_file(fn, timeout=30, logger=None):
start = time.time()
last = start
counter = 1
while True:
lock = open(fn, 'w')
try:
fcntl.flock(lock, fcntl.LOCK_EX | fcntl.LOCK_NB)
return lock
except IOError:
lock.close()
current = time.time()
if current - start > timeout:
return None
# Print a message in every 5 seconds
if logger and (current - last > 5):
last = current
logger.info('Trying to get lock on %s (tried %s seconds) ...' % (fn, (5 * counter)))
counter += 1
def unlock_file(lock):
fcntl.flock(lock, fcntl.LOCK_UN)
def chain_unique(*iterables):
"""Chain unique objects in a list of querysets, preserving order"""
seen = set()
for element in iterables:
for item in element:
k = item.id
if k not in seen:
seen.add(k)
yield item
def setup_core_layer_sys_path(settings, branchname):
"""
Add OE-Core's lib/oe directory to sys.path in order to allow importing
OE python modules
"""
core_layer = get_layer(settings.CORE_LAYER_NAME)
core_layerbranch = core_layer.get_layerbranch(branchname)
if core_layerbranch:
core_urldir = core_layer.get_fetch_dir()
core_repodir = os.path.join(settings.LAYER_FETCH_DIR, core_urldir)
core_layerdir = os.path.join(core_repodir, core_layerbranch.vcs_subdir)
sys.path.insert(0, os.path.join(core_layerdir, 'lib'))
def run_command_interruptible(cmd):
"""
Run a command with output displayed on the console, but ensure any Ctrl+C is
processed only by the child process.
"""
def reenable_sigint():
signal.signal(signal.SIGINT, signal.SIG_DFL)
signal.signal(signal.SIGINT, signal.SIG_IGN)
try:
process = subprocess.Popen(
cmd, cwd=os.path.dirname(sys.argv[0]), shell=True, preexec_fn=reenable_sigint, stdout=subprocess.PIPE, stderr=subprocess.STDOUT
)
reader = codecs.getreader('utf-8')(process.stdout, errors='surrogateescape')
buf = ''
while True:
out = reader.read(1, 1)
if out:
sys.stdout.write(out)
sys.stdout.flush()
buf += out
elif out == '' and process.poll() != None:
break
finally:
signal.signal(signal.SIGINT, signal.SIG_DFL)
return process.returncode, buf
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