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# Copyright (C) 2009 One Laptop Per Child
# Licensed under the terms of the GNU GPL v2 or later; see COPYING for details.
import os
import sys
import shutil
import hashlib
import urllib2
from xml.etree.ElementTree import ElementTree
libdir = os.environ['OOB__libdir']
bindir = os.environ['OOB__bindir']
builddir = os.environ['OOB__builddir']
cachedir = os.environ['OOB__cachedir']
intermediatesdir = os.environ['OOB__intermediatesdir']
outputdir = os.environ['OOB__outputdir']
statedir = os.environ['OOB__statedir']
fsmount = os.environ['OOB__fsmount']
METADATA_NS = "http://linux.duke.edu/metadata/common"
cacheonly = 'OOB__cacheonly' in os.environ
def read_config(module, option):
vname = "CFG_%s__%s" % (module, option)
if not vname in os.environ:
return None
return os.environ[vname]
def read_config_bool(module, option):
vname = "CFG_%s__%s" % (module, option)
if not vname in os.environ:
return None
return bool(int(os.environ[vname]))
def read_buildnr():
buildnr_path = os.path.join(intermediatesdir, 'buildnr')
if not os.path.isfile(buildnr_path):
return "0"
return open(buildnr_path, "r").readline().strip()
def read_laptop_model_number():
path = os.path.join(intermediatesdir, 'laptop_model_number')
if not os.path.isfile(path):
return "0"
return open(path, "r").readline().strip()
def image_name():
major_ver = read_config('global', 'olpc_version_major')
minor_ver = read_config('global', 'olpc_version_minor')
cust_tag = read_config('global', 'customization_tag')
buildnr = int(read_buildnr())
modelnr = read_laptop_model_number()
return "%s%s%03d%s%s" % (major_ver, minor_ver, buildnr, cust_tag, modelnr)
def arch_matches(myarch, arch):
# figure out if a package under 'arch' is suitable for 'myarch'
# myarch is either 'i386', 'arm' or 'armhfp'
# but 'arch' can be i386, i586, i686, armv5tel, armv7hl, and so on
# noarch is always suitable
if arch == 'noarch':
return True
if myarch.startswith('arm'):
return arch.startswith('arm')
elif myarch == 'i386':
return arch in ['i386', 'i486', 'i586', 'i686']
else:
return False
def add_packages_from_xml(fd, pkglist, myarch):
et = ElementTree(file=fd)
root = et.getroot()
for i in root.getchildren():
if not i.tag.endswith("}package"):
continue
arch = i.find("{%s}arch" % METADATA_NS)
name = i.find("{%s}name" % METADATA_NS)
# Only add packages that are suitable for myarch.
if myarch and arch is not None:
if not arch_matches(myarch, arch.text):
continue
if name is not None:
pkglist.add(name.text)
def get_repomd(baseurl):
# default
md = {
'primary' : 'repodata/primary.xml.gz',
'primary_db' : 'repodata/primary.sqlite.bz2',
'group' : 'repodata/comps.xml',
'group_gz' : 'repodata/repodata/comps.xml.gz',
'filelists' : 'repodata/filelists.xml.gz',
'filelists_db' : 'repodata/filelists.sqlite.bz2',
'other' : 'repodata/other.xml.gz',
'other_db' : 'repodata/other.sqlite.bz2'
}
url = "%s/repodata/repomd.xml" % baseurl
try:
fd = cachedurlopen(url)
et = ElementTree(file=fd)
root = et.getroot()
# iterate over data tags
for data in root.findall('{http://linux.duke.edu/metadata/repo}data'):
type = data.attrib['type']
location = data.find('{http://linux.duke.edu/metadata/repo}location')
md[type] = location.attrib['href']
except urllib2.HTTPError:
pass
return md
def ln_or_cp(src, dest):
src_dev = os.stat(src).st_dev
dest_dev = os.stat(dest).st_dev
if src_dev == dest_dev:
if os.path.isdir(dest):
dest = os.path.join(dest, os.path.basename(src))
os.link(src, dest)
else:
shutil.copy(src, dest)
def install_sugar_bundle(path):
bundlesdir = os.path.join(intermediatesdir, "shared", "sugar-bundles")
if not os.path.exists(bundlesdir):
os.makedirs(bundlesdir)
ln_or_cp(path, bundlesdir)
""" A wrapper around urllib2.urlopen() that stores responses in
cache. When cacheonly=True, it works offline, never hitting
the network.
"""
def cachedurlopen(url):
class CachedURLException(Exception):
def __init__(self, value):
self.value=value
cachedfpath = os.path.join(cachedir, 'simplecache', hashlib.sha1(url).hexdigest())
if cacheonly:
if os.path.exists(cachedfpath):
return open(cachedfpath)
else:
print >>sys.stderr, "ERROR: No cached file for %s" % url
raise CachedURLException("No cached file for %s" % url)
ourcachedir=os.path.join(cachedir, 'simplecache')
if not os.path.exists(ourcachedir):
os.makedirs(ourcachedir)
urlfd = urllib2.urlopen(url)
fd = open(cachedfpath, 'w')
fd.write(urlfd.read())
urlfd.close()
fd.close()
return open(cachedfpath, 'r')
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