pkgs/applications/window-managers/sommelier/update.py

   1 #! /usr/bin/env nix-shell
   2 #! nix-shell -p common-updater-scripts python3
   3 #! nix-shell -i python
   4
   5 import csv
   6 import json
   7 import re
   8 import shlex
   9 import subprocess
  10 from os.path import abspath, dirname, splitext
  11 from urllib.request import urlopen
  12
  13 # CrOS version numbers look like this:
  14 # [<chrome-major-version>.]<tip-build>.<branch-build>.<branch-branch-build>
  15 #
  16 # As far as I can tell, branches are where internal Google
  17 # modifications are added to turn Chromium OS into Chrome OS, and
  18 # branch branches are used for fixes for specific devices.  So for
  19 # Chromium OS they will always be 0.  This is a best guess, and is not
  20 # documented.
  21 with urlopen('https://chromiumdash.appspot.com/cros/download_serving_builds_csv?deviceCategory=ChromeOS') as resp:
  22     reader = csv.reader(map(bytes.decode, resp))
  23     header = reader.__next__()
  24     cr_stable_index = header.index('cr_stable')
  25     cros_stable_index = header.index('cros_stable')
  26     chrome_version = []
  27     platform_version = []
  28
  29     for line in reader:
  30         this_chrome_version = list(map(int, line[cr_stable_index].split('.')))
  31         this_platform_version = list(map(int, line[cros_stable_index].split('.')))
  32         chrome_version = max(chrome_version, this_chrome_version)
  33         platform_version = max(platform_version, this_platform_version)
  34
  35 chrome_major_version = chrome_version[0]
  36 chromeos_tip_build = platform_version[0]
  37 release_branch = f'release-R{chrome_major_version}-{chromeos_tip_build}.B'
  38
  39 # Determine the git revision.
  40 with urlopen(f'https://chromium.googlesource.com/chromiumos/platform2/+/refs/heads/{release_branch}?format=JSON') as resp:
  41     resp.readline() # Remove )]}' header
  42     rev = json.load(resp)['commit']
  43
  44 # Determine the patch version by counting the commits that have been
  45 # added to the release branch since it forked off the chromeos branch.
  46 with urlopen(f'https://chromium.googlesource.com/chromiumos/platform2/+log/refs/heads/main..{rev}/vm_tools/sommelier?format=JSON') as resp:
  47     resp.readline() # Remove )]}' header
  48     branch_commits = json.load(resp)['log']
  49     version = f'{chrome_major_version}.{len(branch_commits)}'
  50
  51 # Update the version, git revision, and hash in sommelier's default.nix.
  52 subprocess.run(['update-source-version', 'sommelier', f'--rev={rev}', version])
  53
  54 # Find the path to sommelier's default.nix, so Cargo.lock can be written
  55 # into the same directory.
  56 argv = ['nix-instantiate', '--eval', '--json', '-A', 'sommelier.meta.position']
  57 position = json.loads(subprocess.check_output(argv).decode('utf-8'))
  58 filename = re.match(r'[^:]*', position)[0]