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crosvm.updateScript: use more stable update source

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It has been explained to me that cros-omahaproxy reports which
versions are available to users, while cros-updates-serving reports
the latest builds available for each channel.  The latter is probably
better for our use case anyway, and apparently, while both aren't
officially supported, is less likely to randomly break.

So let's use that instead, even if it is much more annoying to parse.
This commit is contained in:
Alyssa Ross 2019-12-17 17:07:40 +00:00
parent 826d61e5d9
commit 7e683f6393
1 changed files with 18 additions and 12 deletions
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30
pkgs/applications/virtualization/crosvm/update.py
View file

@ -1,15 +1,15 @@
#! /usr/bin/env nix-shell
#! nix-shell -p python3 -p nix-prefetch-git -i python
#! nix-shell -p nix-prefetch-git "python3.withPackages (ps: with ps; [ lxml ])"
#! nix-shell -i python
import base64
import csv
import json
import re
import subprocess
import xml.etree.ElementTree as ElementTree
from codecs import iterdecode
from operator import itemgetter
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.
@ -27,13 +27,19 @@ buildspecs_url = f'{manifest_versions}/+/refs/heads/master/paladin/buildspecs/'
# 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-omahaproxy.appspot.com/all') as resp:
versions = csv.DictReader(iterdecode(resp, 'utf-8'))
stables = filter(lambda v: v['track'] == 'stable-channel', versions)
stable = sorted(stables, key=itemgetter('chrome_version'), reverse=True)[0]
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+', stable['chrome_version'])[0]
chromeos_tip_build = re.match(r'\d+', stable['chromeos_version'])[0]
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
@ -52,8 +58,8 @@ 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()).decode('utf-8')
root = ElementTree.fromstring(xml)
xml = base64.decodebytes(resp.read())
root = etree.fromstring(xml)
for project in root.findall('project'):
revisions[project.get('name')] = project.get('revision')