56e9d1f936
"paladin" doesn't seem to be up to date, whereas "full" seems to match what cros-updates-serving.appspot.com reports is currently being shipped to Chromebooks.
91 lines
3.8 KiB
Python
Executable file
91 lines
3.8 KiB
Python
Executable file
#! /usr/bin/env nix-shell
|
|
#! nix-shell -p nix-prefetch-git "python3.withPackages (ps: with ps; [ lxml ])"
|
|
#! nix-shell -i python
|
|
|
|
import base64
|
|
import json
|
|
import re
|
|
import subprocess
|
|
from codecs import iterdecode
|
|
from os.path import dirname, splitext
|
|
from lxml import etree
|
|
from lxml.etree import HTMLParser
|
|
from urllib.request import urlopen
|
|
|
|
# ChromiumOS components required to build crosvm.
|
|
components = ['chromiumos/platform/crosvm', 'chromiumos/third_party/adhd']
|
|
|
|
git_root = 'https://chromium.googlesource.com/'
|
|
manifest_versions = f'{git_root}chromiumos/manifest-versions'
|
|
buildspecs_url = f'{manifest_versions}/+/refs/heads/master/full/buildspecs/'
|
|
|
|
# CrOS version numbers look like this:
|
|
# [<chrome-major-version>.]<tip-build>.<branch-build>.<branch-branch-build>
|
|
#
|
|
# As far as I can tell, branches are where internal Google
|
|
# modifications are added to turn Chromium OS into Chrome OS, and
|
|
# branch branches are used for fixes for specific devices. So for
|
|
# Chromium OS they will always be 0. This is a best guess, and is not
|
|
# documented.
|
|
with urlopen('https://cros-updates-serving.appspot.com/') as resp:
|
|
document = etree.parse(resp, HTMLParser())
|
|
# bgcolor="lightgreen" is set on the most up-to-date version for
|
|
# each channel, so find a lightgreen cell in the "Stable" column.
|
|
(platform_version, chrome_version) = document.xpath("""
|
|
(//table[@id="cros-updates"]/tr/td[1 + count(
|
|
//table[@id="cros-updates"]/thead/tr[1]/th[text() = "Stable"]
|
|
/preceding-sibling::*)
|
|
][@bgcolor="lightgreen"])[1]/text()
|
|
""")
|
|
|
|
chrome_major_version = re.match(r'\d+', chrome_version)[0]
|
|
chromeos_tip_build = re.match(r'\d+', platform_version)[0]
|
|
|
|
# Find the most recent buildspec for the stable Chrome version and
|
|
# Chromium OS build number. Its branch build and branch branch build
|
|
# numbers will (almost?) certainly be 0. It will then end with an rc
|
|
# number -- presumably these are release candidates, one of which
|
|
# becomes the final release. Presumably the one with the highest rc
|
|
# number.
|
|
with urlopen(f'{buildspecs_url}{chrome_major_version}/?format=TEXT') as resp:
|
|
listing = base64.decodebytes(resp.read()).decode('utf-8')
|
|
buildspecs = [(line.split('\t', 1)[1]) for line in listing.splitlines()]
|
|
buildspecs = [s for s in buildspecs if s.startswith(chromeos_tip_build)]
|
|
buildspecs.sort(reverse=True)
|
|
buildspec = splitext(buildspecs[0])[0]
|
|
|
|
revisions = {}
|
|
|
|
# Read the buildspec, and extract the git revisions for each component.
|
|
with urlopen(f'{buildspecs_url}{chrome_major_version}/{buildspec}.xml?format=TEXT') as resp:
|
|
xml = base64.decodebytes(resp.read())
|
|
root = etree.fromstring(xml)
|
|
for project in root.findall('project'):
|
|
revisions[project.get('name')] = project.get('revision')
|
|
|
|
# Initialize the data that will be output from this script. Leave the
|
|
# rc number in buildspec so nobody else is subject to the same level
|
|
# of confusion I have been.
|
|
data = {'version': f'{chrome_major_version}.{buildspec}', 'components': {}}
|
|
|
|
# Fill in the 'components' dictionary with the output from
|
|
# nix-prefetch-git, which can be passed straight to fetchGit when
|
|
# imported by Nix.
|
|
for component in components:
|
|
argv = ['nix-prefetch-git',
|
|
'--url', git_root + component,
|
|
'--rev', revisions[component]]
|
|
|
|
output = subprocess.check_output(argv)
|
|
data['components'][component] = json.loads(output.decode('utf-8'))
|
|
|
|
# Find the path to crosvm's default.nix, so the srcs data can be
|
|
# written into the same directory.
|
|
argv = ['nix-instantiate', '--eval', '--json', '-A', 'crosvm.meta.position']
|
|
position = json.loads(subprocess.check_output(argv).decode('utf-8'))
|
|
filename = re.match(r'[^:]*', position)[0]
|
|
|
|
# Finally, write the output.
|
|
with open(dirname(filename) + '/upstream-info.json', 'w') as out:
|
|
json.dump(data, out, indent=2)
|
|
out.write('\n')
|