in build/linux/sysroot_scripts/install-sysroot.py [0:0]
def InstallSysroot(target_platform, target_arch):
sysroot_dict = GetSysrootDict(target_platform, target_arch)
tarball_filename = sysroot_dict['Tarball']
tarball_sha1sum = sysroot_dict['Sha1Sum']
# TODO(thestig) Consider putting this elsewhere to avoid having to recreate
# it on every build.
linux_dir = os.path.dirname(SCRIPT_DIR)
sysroot = os.path.join(linux_dir, sysroot_dict['SysrootDir'])
url = '%s/%s/%s/%s' % (URL_PREFIX, URL_PATH, tarball_sha1sum,
tarball_filename)
stamp = os.path.join(sysroot, '.stamp')
if os.path.exists(stamp):
with open(stamp) as s:
if s.read() == url:
return
print('Installing Debian %s %s root image: %s' % \
(target_platform, target_arch, sysroot))
if os.path.isdir(sysroot):
shutil.rmtree(sysroot)
os.mkdir(sysroot)
tarball = os.path.join(sysroot, tarball_filename)
print('Downloading %s' % url)
sys.stdout.flush()
sys.stderr.flush()
for _ in range(3):
try:
response = urlopen(url)
with open(tarball, "wb") as f:
f.write(response.read())
break
except Exception: # Ignore exceptions.
pass
else:
raise Error('Failed to download %s' % url)
sha1sum = GetSha1(tarball)
if sha1sum != tarball_sha1sum:
raise Error('Tarball sha1sum is wrong.'
'Expected %s, actual: %s' % (tarball_sha1sum, sha1sum))
subprocess.check_call(['tar', 'xf', tarball, '-C', sysroot])
os.remove(tarball)
with open(stamp, 'w') as s:
s.write(url)