a8db7b0443
The current script used to inject the IPA container into CoreOS is not pep8 compliant, has requirements that are not in global-requirements, and never has tests run. Now requirement on plumbum is removed, script is pep8 compliant, flake8 runs against the script when tests are run. Closes-bug: #1337551 Change-Id: I14d3e46e60c4e072f34f80dc50d7214079953f49
257 lines
11 KiB
Python
Executable File
257 lines
11 KiB
Python
Executable File
#!/usr/bin/env python
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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import shutil
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import subprocess
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import sys
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import tempfile
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import time
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import requests
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COREOS_VERSION = "367.1.0"
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COREOS_ARCH = "amd64-usr"
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COREOS_BASE_URL = ("http://storage.core-os.net/coreos/{arch}/{ver}"
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.format(arch=COREOS_ARCH, ver=COREOS_VERSION))
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COREOS_PXE_DIGESTS = "coreos_production_pxe_image.cpio.gz.DIGESTS.asc"
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COREOS_PXE_KERNEL = "coreos_production_pxe.vmlinuz"
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COREOS_PXE_IMAGE = "coreos_production_pxe_image.cpio.gz"
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COREOS_PXE_IMAGE_URL = "{url}/{img}".format(url=COREOS_BASE_URL,
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img=COREOS_PXE_IMAGE)
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COREOS_PXE_KERNEL_URL = "{url}/{kernel}".format(url=COREOS_BASE_URL,
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kernel=COREOS_PXE_KERNEL)
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COREOS_PXE_DIGESTS_URL = "{url}/{digests}".format(url=COREOS_BASE_URL,
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digests=COREOS_PXE_DIGESTS)
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def get_etag(cache_name):
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etag_file = "{}.etag".format(cache_name)
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if not os.path.exists(etag_file):
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return None
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with open(etag_file, 'rb') as fp:
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etag = fp.read()
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etag.strip()
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return etag
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def save_etag(cache_name, etag):
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etag_file = "{}.etag".format(cache_name)
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with open(etag_file, 'w+b') as fp:
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fp.write(etag)
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def cache_file(cache_name, remote_url):
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print("{cname} <- {url}".format(cname=cache_name, url=remote_url))
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etag = get_etag(cache_name)
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headers = {}
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if etag:
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headers['If-None-Match'] = etag
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start = time.time()
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r = requests.get(remote_url, headers=headers)
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if r.status_code == 304:
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print("[etag-match]")
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return
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if r.status_code != 200:
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raise RuntimeError('Failed to download {url}, got HTTP {code} Status '
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'Code.'.format(url=remote_url, code=r.status_code))
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with open(cache_name, 'w+b') as fp:
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fp.write(r.content)
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print("{length} bytes in {timespan} seconds"
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.format(length=len(r.content), timespan=time.time() - start))
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save_etag(cache_name, r.headers['etag'])
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def inject_oem(archive, oem_dir, output_file):
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d = tempfile.mkdtemp(prefix="oem-inject")
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try:
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dest_oem_dir = os.path.join(d, 'usr', 'share', 'oem')
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cmd_chain = 'gunzip -c {} | cpio -iv'.format(archive)
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execute(cmd_chain, shell=True, cwd=d)
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shutil.copytree(oem_dir, dest_oem_dir)
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cmd_chain = 'find . -depth -print | sort | cpio -o -H newc | ' \
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'gzip > {}'.format(output_file)
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execute(cmd_chain, shell=True, cwd=d)
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finally:
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shutil.rmtree(d)
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return output_file
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def validate_digests(digests, target, hash_type='sha1'):
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cmd_chain = 'grep -i -A1 "^# {htype} HASH$" {digests} | grep {tgt} | ' \
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'{htype}sum -c /dev/stdin'.format(htype=hash_type,
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digests=digests,
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tgt=os.path.basename(target))
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execute(cmd_chain, shell=True, cwd=os.path.dirname(digests))
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def main():
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if len(sys.argv) != 3:
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print("usage: {} [oem-directory-to-inject] [output-directory]"
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.format(os.path.basename(__file__)))
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return
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oem_dir = os.path.abspath(os.path.expanduser(sys.argv[1]))
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output_dir = os.path.abspath(os.path.expanduser(sys.argv[2]))
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if not os.path.exists(oem_dir):
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print("Error: {} doesn't exist.".format(oem_dir))
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return
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if not os.path.exists(os.path.join(oem_dir, 'cloud-config.yml')):
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print("Error: {} is missing cloud-config.yml".format(oem_dir))
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return
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here = os.path.abspath(os.path.dirname(__file__))
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top_cache_dir = os.path.join(os.path.dirname(here), ".image_cache")
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cache_dir = os.path.join(top_cache_dir, COREOS_ARCH, COREOS_VERSION)
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if not os.path.exists(cache_dir):
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os.makedirs(cache_dir)
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orig_cpio = os.path.join(cache_dir, COREOS_PXE_IMAGE)
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digests = os.path.join(cache_dir, COREOS_PXE_DIGESTS)
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kernel = os.path.join(cache_dir, COREOS_PXE_KERNEL)
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cache_file(digests, COREOS_PXE_DIGESTS_URL)
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gpg_verify_file(digests)
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cache_file(kernel, COREOS_PXE_KERNEL_URL)
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validate_digests(digests, kernel)
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cache_file(orig_cpio, COREOS_PXE_IMAGE_URL)
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validate_digests(digests, orig_cpio)
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if not os.path.exists(output_dir):
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os.makedirs(output_dir)
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output_kernel = os.path.join(output_dir, os.path.basename(kernel))
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output_cpio = os.path.join(output_dir,
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os.path.basename(orig_cpio).replace('.cpio.gz', '-oem.cpio.gz'))
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inject_oem(orig_cpio, oem_dir, output_cpio)
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shutil.copy(kernel, output_kernel)
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def gpg_verify_file(ascfile):
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d = tempfile.mkdtemp(prefix="oem-gpg-validate")
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try:
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tmpring = os.path.join(d, 'tmp.gpg')
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key = os.path.join(d, 'coreos.key')
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with open(key, 'w+b') as fp:
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fp.write(GPG_KEY)
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execute(['gpg', '--batch', '--no-default-keyring',
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'--keyring', tmpring, '--import', key])
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execute(['gpg', '--batch', '--no-default-keyring',
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'--keyring', tmpring, '--verify', ascfile])
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finally:
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shutil.rmtree(d)
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def execute(cmd, shell=False, cwd=None):
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popen_obj = subprocess.Popen(cmd, shell=shell, cwd=cwd)
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popen_obj.communicate()
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if popen_obj.returncode != 0:
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raise subprocess.CalledProcessError(returncode=popen_obj.returncode,
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cmd=cmd)
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GPG_KEY = """-----BEGIN PGP PUBLIC KEY BLOCK-----
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Version: GnuPG v2.0.20 (GNU/Linux)
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BeiJ6tEeDHDzdA==
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=4Qn0
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-----END PGP PUBLIC KEY BLOCK-----
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"""
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if __name__ == "__main__":
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main()
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