diff options
Diffstat (limited to 'pkgs/os-specific/linux/chromium-os/update.py')
| -rwxr-xr-x | pkgs/os-specific/linux/chromium-os/update.py | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/pkgs/os-specific/linux/chromium-os/update.py b/pkgs/os-specific/linux/chromium-os/update.py new file mode 100755 index 00000000000..0ae7e8badaa --- /dev/null +++ b/pkgs/os-specific/linux/chromium-os/update.py @@ -0,0 +1,123 @@ +#! /usr/bin/env nix-shell +#! nix-shell -i python -p "python3.withPackages (ps: with ps; [ lxml ])" + +import base64 +import json +import subprocess +from codecs import iterdecode +from os import scandir +from os.path import dirname, splitext +from lxml import etree +from lxml.etree import HTMLParser +from re import MULTILINE, fullmatch, match, search +from urllib.request import urlopen + +# ChromiumOS components used in Nixpkgs +components = [ + 'aosp/platform/external/libchrome', + 'aosp/platform/external/modp_b64', + 'chromiumos/overlays/chromiumos-overlay', + 'chromiumos/platform/crosvm', + 'chromiumos/platform2', + 'chromiumos/third_party/adhd', + 'chromiumos/third_party/kernel', + 'chromiumos/third_party/modemmanager-next', +] + +git_root = 'https://chromium.googlesource.com/' +manifest_versions = f'{git_root}chromiumos/manifest-versions' +buildspecs_url = f'{manifest_versions}/+/refs/heads/master/paladin/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 = match(r'\d+', chrome_version)[0] +chromeos_tip_build = 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': {}} + +paths = {} + +# 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: + name = component.split('/')[-1] + url = f'{git_root}{component}' + rev = revisions[component] + tarball = f'{url}/+archive/{rev}.tar.gz' + output = subprocess.check_output(['nix-prefetch-url', '--print-path', '--unpack', '--name', name, tarball]) + (sha256, path) = output.decode('utf-8').splitlines() + paths[component] = path + data['components'][component] = { + 'name': name, + 'url': url, + 'rev': rev, + 'sha256': sha256, + } + +# Get the version number of libchrome. +chromiumos_overlay = paths['chromiumos/overlays/chromiumos-overlay'] +contents = scandir(f'{chromiumos_overlay}/chromeos-base/libchrome') +libchrome_version = lambda name: fullmatch(r'libchrome-(\d+)\.ebuild', name)[1] +ebuilds = [f for f in contents if f.is_file(follow_symlinks=False)] +versions = [libchrome_version(f.name) for f in ebuilds] +latest = sorted(versions, key=int)[-1] +data['components']['aosp/platform/external/libchrome']['version'] = latest + +# Get the version number of the kernel. +kernel = paths['chromiumos/third_party/kernel'] +makefile = open(f'{kernel}/Makefile').read() +version = search(r'^VERSION = (.+)$', makefile, MULTILINE)[1] +patchlevel = search(r'^PATCHLEVEL = (.*?)$', makefile, MULTILINE)[1] +sublevel = search(r'^SUBLEVEL = (.*?)$', makefile, MULTILINE)[1] +extra = search(r'^EXTRAVERSION =[ \t]*(.*?)$', makefile, MULTILINE)[1] +full_ver = '.'.join(filter(None, [version, patchlevel, sublevel])) + extra +data['components']['chromiumos/third_party/kernel']['version'] = full_ver + +# Finally, write the output. +with open(dirname(__file__) + '/upstream-info.json', 'w') as out: + json.dump(data, out, indent=2) + out.write('\n') |