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#!/usr/bin/env nix-shell
#!nix-shell -i python3 -p "python3.withPackages (ps: [ ps.beautifulsoup4 ps.lxml ps.packaging ])"
from functools import cached_property
from itertools import groupby
import json
import os
import pathlib
import subprocess
import sys
import urllib.request
from dataclasses import dataclass
from enum import Enum
from bs4 import BeautifulSoup, NavigableString, Tag
from packaging.version import parse as parse_version, Version
HERE = pathlib.Path(__file__).parent
ROOT = HERE.parent.parent.parent.parent
VERSIONS_FILE = HERE / "kernels-org.json"
class KernelNature(Enum):
MAINLINE = 1
STABLE = 2
LONGTERM = 3
@dataclass
class KernelRelease:
nature: KernelNature
version: str
date: str
link: str
eol: bool = False
@cached_property
def parsed_version(self) -> Version:
return parse_version(self.version)
@cached_property
def branch(self) -> str:
version = self.parsed_version
# This is a testing kernel.
if version.is_prerelease:
return "testing"
else:
return f"{version.major}.{version.minor}"
def parse_release(release: Tag) -> KernelRelease | None:
columns: list[Tag] = list(release.find_all("td"))
try:
nature = KernelNature[columns[0].get_text().rstrip(":").upper()]
except KeyError:
# skip linux-next
return None
version = columns[1].get_text().rstrip(" [EOL]")
date = columns[2].get_text()
link = columns[3].find("a")
if link is not None and isinstance(link, Tag):
link = link.attrs.get("href")
assert link is not None, f"link for kernel {version} is non-existent"
eol = bool(release.find(class_="eolkernel"))
return KernelRelease(
nature=nature,
version=version,
date=date,
link=link,
eol=eol,
)
def get_hash(kernel: KernelRelease):
if kernel.branch == "testing":
args = ["--unpack"]
else:
args = []
hash = (
subprocess.check_output(["nix-prefetch-url", kernel.link] + args)
.decode()
.strip()
)
return f"sha256:{hash}"
def get_oldest_branch(kernels) -> Version:
return min(parse_version(v) for v in kernels.keys() if v != "testing")
def predates_oldest_branch(oldest: Version, to_compare: str) -> bool:
if to_compare == "testing":
return False
return parse_version(to_compare) < oldest
def commit(message):
return subprocess.check_call(["git", "commit", "-m", message, VERSIONS_FILE])
def main():
kernel_org = urllib.request.urlopen("https://kernel.org/")
soup = BeautifulSoup(kernel_org.read().decode(), "lxml")
release_table = soup.find(id="releases")
if not release_table or isinstance(release_table, NavigableString):
print(release_table, file=sys.stderr)
print("Failed to find the release table on https://kernel.org", file=sys.stderr)
sys.exit(1)
releases = release_table.find_all("tr")
parsed_releases = [
parsed for release in releases
if (parsed := parse_release(release)) is not None
]
all_kernels = json.load(VERSIONS_FILE.open())
oldest_branch = get_oldest_branch(all_kernels)
for (branch, kernels) in groupby(parsed_releases, lambda kernel: kernel.branch):
kernel = max(kernels, key=lambda kernel: kernel.parsed_version)
nixpkgs_branch = branch.replace(".", "_")
old_version = all_kernels.get(branch, {}).get("version")
if old_version == kernel.version:
print(f"linux_{nixpkgs_branch}: {kernel.version} is latest, skipping...")
continue
if predates_oldest_branch(oldest_branch, kernel.branch):
print(
f"{kernel.branch} is too old and not supported anymore, skipping...",
file=sys.stderr
)
continue
if old_version is None:
if kernel.eol:
print(
f"{kernel.branch} is EOL, not adding...",
file=sys.stderr
)
continue
message = f"linux_{nixpkgs_branch}: init at {kernel.version}"
else:
message = f"linux_{nixpkgs_branch}: {old_version} -> {kernel.version}"
print(message, file=sys.stderr)
all_kernels[branch] = {
"version": kernel.version,
"hash": get_hash(kernel),
"lts": kernel.nature == KernelNature.LONGTERM,
}
with VERSIONS_FILE.open("w") as fd:
json.dump(all_kernels, fd, indent=4)
fd.write("\n") # makes editorconfig happy
if os.environ.get("COMMIT") == "1":
commit(message)
if __name__ == "__main__":
main()
|
