tequilaOS/platform_build
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extract_kernel: make it py2/py3 compatible

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use py3 for AOSP build, while the script itself can be
executed under py2/py3 environment directly.

TEST: extract info from Pixel 4 kernel

Change-Id: I00db6dabb1ff93f0758017a666c476816caefae7
This commit is contained in:
cfig 2021-02-07 17:01:26 +08:00
parent 289a0ffdaf
commit 791378cda1
No known key found for this signature in database
GPG key ID: B104C307F0FDABB7
3 changed files with 22 additions and 17 deletions
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4
tools/Android.bp
View file

@ -62,10 +62,10 @@ python_binary_host {
srcs: ["extract_kernel.py"],
version: {
py2: {
enabled: true,
enabled: false,
},
py3: {
enabled: false,
enabled: true,
},
},
}

23
tools/extract_kernel.py
View file

@ -39,12 +39,12 @@ COMPRESSION_ALGO = (
# "Linux version " UTS_RELEASE " (" LINUX_COMPILE_BY "@"
# LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION "\n";
LINUX_BANNER_PREFIX = b'Linux version '
LINUX_BANNER_REGEX = LINUX_BANNER_PREFIX + \
LINUX_BANNER_REGEX = LINUX_BANNER_PREFIX.decode() + \
r'(?P<release>(?P<version>[0-9]+[.][0-9]+[.][0-9]+).*) \(.*@.*\) \((?P<compiler>.*)\) .*\n'
def get_from_release(input_bytes, start_idx, key):
null_idx = input_bytes.find('\x00', start_idx)
null_idx = input_bytes.find(b'\x00', start_idx)
if null_idx < 0:
return None
try:
@ -69,7 +69,7 @@ def dump_from_release(input_bytes, key):
value = get_from_release(input_bytes, idx, key)
if value:
return value
return value.encode()
idx += len(LINUX_BANNER_PREFIX)
@ -140,7 +140,7 @@ def try_decompress(cmd, search_bytes, input_bytes):
while True:
idx = input_bytes.find(search_bytes, idx)
if idx < 0:
raise StopIteration()
return
yield try_decompress_bytes(cmd, input_bytes[idx:])
idx += 1
@ -183,6 +183,11 @@ def dump_to_file(f, dump_fn, input_bytes, desc):
return False
return True
def to_bytes_io(b):
"""
Make b, which is either sys.stdout or sys.stdin, receive bytes as arguments.
"""
return b.buffer if sys.version_info.major == 3 else b
def main():
parser = argparse.ArgumentParser(
@ -194,35 +199,35 @@ def main():
help='Input kernel image. If not specified, use stdin',
metavar='FILE',
type=argparse.FileType('rb'),
default=sys.stdin)
default=to_bytes_io(sys.stdin))
parser.add_argument('--output-configs',
help='If specified, write configs. Use stdout if no file '
'is specified.',
metavar='FILE',
nargs='?',
type=argparse.FileType('wb'),
const=sys.stdout)
const=to_bytes_io(sys.stdout))
parser.add_argument('--output-version',
help='If specified, write version. Use stdout if no file '
'is specified.',
metavar='FILE',
nargs='?',
type=argparse.FileType('wb'),
const=sys.stdout)
const=to_bytes_io(sys.stdout))
parser.add_argument('--output-release',
help='If specified, write kernel release. Use stdout if '
'no file is specified.',
metavar='FILE',
nargs='?',
type=argparse.FileType('wb'),
const=sys.stdout)
const=to_bytes_io(sys.stdout))
parser.add_argument('--output-compiler',
help='If specified, write the compiler information. Use stdout if no file '
'is specified.',
metavar='FILE',
nargs='?',
type=argparse.FileType('wb'),
const=sys.stdout)
const=to_bytes_io(sys.stdout))
parser.add_argument('--tools',
help='Decompression tools to use. If not specified, PATH '
'is searched.',

12
tools/test_extract_kernel.py
View file

@ -15,16 +15,16 @@
# limitations under the License.
import unittest
from extract_kernel import get_version, dump_version
from extract_kernel import dump_version
class ExtractKernelTest(unittest.TestCase):
def test_extract_version(self):
self.assertEqual("4.9.100", get_version(
b'Linux version 4.9.100-a123 (a@a) (a) a\n\x00', 0))
self.assertEqual("4.9.123", get_version(
b'Linux version 4.9.123 (@) () \n\x00', 0))
self.assertEqual("4.9.100", dump_version(
b'Linux version 4.9.100-a123 (a@a) (a) a\n\x00'))
self.assertEqual("4.9.123", dump_version(
b'Linux version 4.9.123 (@) () \n\x00'))
def test_dump_self(self):
self.assertEqual("4.9.1", dump_version(
b"trash\x00Linux version 4.8.8\x00trash\x00"
"other trash Linux version 4.9.1-g3 (2@s) (2) a\n\x00"))
b"other trash Linux version 4.9.1-g3 (2@s) (2) a\n\x00"))