596 lines
18 KiB
Python
Executable file
596 lines
18 KiB
Python
Executable file
#!/usr/bin/env python3
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"""
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Update a Python package expression by passing in the `.nix` file, or the directory containing it.
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You can pass in multiple files or paths.
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You'll likely want to use
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``
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$ ./update-python-libraries ../../pkgs/development/python-modules/**/default.nix
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``
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to update all non-pinned libraries in that folder.
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"""
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import argparse
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import collections
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import json
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import logging
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import os
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import re
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import subprocess
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from concurrent.futures import ThreadPoolExecutor as Pool
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from typing import Any, Optional
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import requests
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from packaging.specifiers import SpecifierSet
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from packaging.version import InvalidVersion
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from packaging.version import Version as _Version
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INDEX = "https://pypi.io/pypi"
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"""url of PyPI"""
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EXTENSIONS = ["tar.gz", "tar.bz2", "tar", "zip", ".whl"]
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"""Permitted file extensions. These are evaluated from left to right and the first occurance is returned."""
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PRERELEASES = False
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BULK_UPDATE = False
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GIT = "git"
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NIXPKGS_ROOT = (
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subprocess.check_output(["git", "rev-parse", "--show-toplevel"])
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.decode("utf-8")
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.strip()
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)
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logging.basicConfig(level=logging.INFO)
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class Version(_Version, collections.abc.Sequence):
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def __init__(self, version):
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super().__init__(version)
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# We cannot use `str(Version(0.04.21))` because that becomes `0.4.21`
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# https://github.com/avian2/unidecode/issues/13#issuecomment-354538882
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self.raw_version = version
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def __getitem__(self, i):
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return self._version.release[i]
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def __len__(self):
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return len(self._version.release)
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def __iter__(self):
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yield from self._version.release
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def _get_values(attribute, text):
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"""Match attribute in text and return all matches.
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:returns: List of matches.
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"""
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regex = rf'{re.escape(attribute)}\s+=\s+"(.*)";'
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regex = re.compile(regex)
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values = regex.findall(text)
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return values
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def _get_attr_value(attr_path: str) -> Optional[Any]:
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try:
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response = subprocess.check_output(
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[
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"nix",
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"--extra-experimental-features",
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"nix-command",
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"eval",
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"-f",
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f"{NIXPKGS_ROOT}/default.nix",
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"--json",
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f"{attr_path}",
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],
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stderr=subprocess.DEVNULL,
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)
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return json.loads(response.decode())
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except (subprocess.CalledProcessError, ValueError):
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return None
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def _get_unique_value(attribute, text):
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"""Match attribute in text and return unique match.
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:returns: Single match.
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"""
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values = _get_values(attribute, text)
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n = len(values)
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if n > 1:
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raise ValueError("found too many values for {}".format(attribute))
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elif n == 1:
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return values[0]
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else:
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raise ValueError("no value found for {}".format(attribute))
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def _get_line_and_value(attribute, text, value=None):
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"""Match attribute in text. Return the line and the value of the attribute."""
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if value is None:
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regex = rf"({re.escape(attribute)}\s+=\s+\"(.*)\";)"
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else:
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regex = rf"({re.escape(attribute)}\s+=\s+\"({re.escape(value)})\";)"
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regex = re.compile(regex)
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results = regex.findall(text)
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n = len(results)
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if n > 1:
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raise ValueError("found too many values for {}".format(attribute))
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elif n == 1:
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return results[0]
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else:
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raise ValueError("no value found for {}".format(attribute))
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def _replace_value(attribute, value, text, oldvalue=None):
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"""Search and replace value of attribute in text."""
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if oldvalue is None:
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old_line, old_value = _get_line_and_value(attribute, text)
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else:
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old_line, old_value = _get_line_and_value(attribute, text, oldvalue)
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new_line = old_line.replace(old_value, value)
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new_text = text.replace(old_line, new_line)
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return new_text
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def _fetch_page(url):
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r = requests.get(url)
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if r.status_code == requests.codes.ok:
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return r.json()
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else:
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raise ValueError("request for {} failed".format(url))
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def _fetch_github(url):
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headers = {}
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token = os.environ.get("GITHUB_API_TOKEN")
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if token:
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headers["Authorization"] = f"token {token}"
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r = requests.get(url, headers=headers)
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if r.status_code == requests.codes.ok:
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return r.json()
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else:
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raise ValueError("request for {} failed".format(url))
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def _hash_to_sri(algorithm, value):
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"""Convert a hash to its SRI representation"""
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return (
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subprocess.check_output(["nix", "hash", "to-sri", "--type", algorithm, value])
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.decode()
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.strip()
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)
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def _skip_bulk_update(attr_name: str) -> bool:
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return bool(_get_attr_value(f"{attr_name}.skipBulkUpdate"))
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SEMVER = {
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"major": 0,
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"minor": 1,
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"patch": 2,
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}
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def _determine_latest_version(current_version, target, versions):
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"""Determine latest version, given `target`."""
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current_version = Version(current_version)
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def _parse_versions(versions):
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for v in versions:
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try:
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yield Version(v)
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except InvalidVersion:
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pass
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versions = _parse_versions(versions)
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index = SEMVER[target]
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ceiling = list(current_version[0:index])
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if len(ceiling) == 0:
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ceiling = None
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else:
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ceiling[-1] += 1
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ceiling = Version(".".join(map(str, ceiling)))
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# We do not want prereleases
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versions = SpecifierSet(prereleases=PRERELEASES).filter(versions)
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if ceiling is not None:
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versions = SpecifierSet(f"<{ceiling}").filter(versions)
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return (max(sorted(versions))).raw_version
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def _get_latest_version_pypi(attr_path, package, extension, current_version, target):
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"""Get latest version and hash from PyPI."""
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url = "{}/{}/json".format(INDEX, package)
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json = _fetch_page(url)
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versions = json["releases"].keys()
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version = _determine_latest_version(current_version, target, versions)
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try:
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releases = json["releases"][version]
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except KeyError as e:
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raise KeyError(
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"Could not find version {} for {}".format(version, package)
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) from e
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for release in releases:
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if release["filename"].endswith(extension):
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# TODO: In case of wheel we need to do further checks!
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sha256 = release["digests"]["sha256"]
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break
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else:
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sha256 = None
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return version, sha256, None
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def _get_latest_version_github(attr_path, package, extension, current_version, target):
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def strip_prefix(tag):
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return re.sub("^[^0-9]*", "", tag)
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def get_prefix(string):
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matches = re.findall(r"^([^0-9]*)", string)
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return next(iter(matches), "")
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try:
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homepage = subprocess.check_output(
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[
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"nix",
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"eval",
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"-f",
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f"{NIXPKGS_ROOT}/default.nix",
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"--raw",
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f"{attr_path}.src.meta.homepage",
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]
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).decode("utf-8")
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except Exception as e:
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raise ValueError(f"Unable to determine homepage: {e}")
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owner_repo = homepage[len("https://github.com/") :] # remove prefix
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owner, repo = owner_repo.split("/")
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url = f"https://api.github.com/repos/{owner}/{repo}/releases"
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all_releases = _fetch_github(url)
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releases = list(filter(lambda x: not x["prerelease"], all_releases))
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if len(releases) == 0:
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raise ValueError(f"{homepage} does not contain any stable releases")
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versions = map(lambda x: strip_prefix(x["tag_name"]), releases)
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version = _determine_latest_version(current_version, target, versions)
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release = next(filter(lambda x: strip_prefix(x["tag_name"]) == version, releases))
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prefix = get_prefix(release["tag_name"])
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# some attributes require using the fetchgit
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git_fetcher_args = []
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if _get_attr_value(f"{attr_path}.src.fetchSubmodules"):
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git_fetcher_args.append("--fetch-submodules")
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if _get_attr_value(f"{attr_path}.src.fetchLFS"):
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git_fetcher_args.append("--fetch-lfs")
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if _get_attr_value(f"{attr_path}.src.leaveDotGit"):
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git_fetcher_args.append("--leave-dotGit")
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if git_fetcher_args:
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algorithm = "sha256"
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cmd = [
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"nix-prefetch-git",
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f"https://github.com/{owner}/{repo}.git",
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"--hash",
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algorithm,
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"--rev",
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f"refs/tags/{release['tag_name']}",
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]
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cmd.extend(git_fetcher_args)
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response = subprocess.check_output(cmd)
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document = json.loads(response.decode())
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hash = _hash_to_sri(algorithm, document[algorithm])
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else:
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try:
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hash = (
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subprocess.check_output(
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[
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"nix-prefetch-url",
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"--type",
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"sha256",
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"--unpack",
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f"{release['tarball_url']}",
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],
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stderr=subprocess.DEVNULL,
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)
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.decode("utf-8")
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.strip()
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)
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except (subprocess.CalledProcessError, UnicodeError):
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# this may fail if they have both a branch and a tag of the same name, attempt tag name
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tag_url = str(release["tarball_url"]).replace(
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"tarball", "tarball/refs/tags"
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)
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hash = (
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subprocess.check_output(
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["nix-prefetch-url", "--type", "sha256", "--unpack", tag_url],
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stderr=subprocess.DEVNULL,
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)
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.decode("utf-8")
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.strip()
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)
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return version, hash, prefix
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FETCHERS = {
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"fetchFromGitHub": _get_latest_version_github,
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"fetchPypi": _get_latest_version_pypi,
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"fetchurl": _get_latest_version_pypi,
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}
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DEFAULT_SETUPTOOLS_EXTENSION = "tar.gz"
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FORMATS = {
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"setuptools": DEFAULT_SETUPTOOLS_EXTENSION,
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"wheel": "whl",
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"pyproject": "tar.gz",
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"flit": "tar.gz",
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}
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def _determine_fetcher(text):
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# Count occurrences of fetchers.
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nfetchers = sum(
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text.count("src = {}".format(fetcher)) for fetcher in FETCHERS.keys()
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)
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if nfetchers == 0:
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raise ValueError("no fetcher.")
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elif nfetchers > 1:
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raise ValueError("multiple fetchers.")
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else:
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# Then we check which fetcher to use.
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for fetcher in FETCHERS.keys():
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if "src = {}".format(fetcher) in text:
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return fetcher
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def _determine_extension(text, fetcher):
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"""Determine what extension is used in the expression.
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If we use:
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- fetchPypi, we check if format is specified.
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- fetchurl, we determine the extension from the url.
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- fetchFromGitHub we simply use `.tar.gz`.
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"""
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if fetcher == "fetchPypi":
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try:
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src_format = _get_unique_value("format", text)
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except ValueError:
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src_format = None # format was not given
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try:
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extension = _get_unique_value("extension", text)
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except ValueError:
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extension = None # extension was not given
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if extension is None:
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if src_format is None:
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src_format = "setuptools"
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elif src_format == "other":
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raise ValueError("Don't know how to update a format='other' package.")
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extension = FORMATS[src_format]
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elif fetcher == "fetchurl":
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url = _get_unique_value("url", text)
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extension = os.path.splitext(url)[1]
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if "pypi" not in url:
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raise ValueError("url does not point to PyPI.")
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elif fetcher == "fetchFromGitHub":
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extension = "tar.gz"
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return extension
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def _update_package(path, target):
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# Read the expression
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with open(path, "r") as f:
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text = f.read()
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# Determine pname. Many files have more than one pname
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pnames = _get_values("pname", text)
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# Determine version.
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version = _get_unique_value("version", text)
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# First we check how many fetchers are mentioned.
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fetcher = _determine_fetcher(text)
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extension = _determine_extension(text, fetcher)
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# Attempt a fetch using each pname, e.g. backports-zoneinfo vs backports.zoneinfo
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successful_fetch = False
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for pname in pnames:
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# when invoked as an updateScript, UPDATE_NIX_ATTR_PATH will be set
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# this allows us to work with packages which live outside of python-modules
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attr_path = os.environ.get("UPDATE_NIX_ATTR_PATH", f"python3Packages.{pname}")
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if BULK_UPDATE and _skip_bulk_update(attr_path):
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raise ValueError(f"Bulk update skipped for {pname}")
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elif _get_attr_value(f"{attr_path}.cargoDeps") is not None:
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raise ValueError(f"Cargo dependencies are unsupported, skipping {pname}")
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try:
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new_version, new_sha256, prefix = FETCHERS[fetcher](
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attr_path, pname, extension, version, target
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)
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successful_fetch = True
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break
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except ValueError:
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continue
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if not successful_fetch:
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raise ValueError(f"Unable to find correct package using these pnames: {pnames}")
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if new_version == version:
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logging.info("Path {}: no update available for {}.".format(path, pname))
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return False
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elif Version(new_version) <= Version(version):
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raise ValueError("downgrade for {}.".format(pname))
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if not new_sha256:
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raise ValueError("no file available for {}.".format(pname))
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text = _replace_value("version", new_version, text)
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# hashes from pypi are 16-bit encoded sha256's, normalize it to sri to avoid merge conflicts
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# sri hashes have been the default format since nix 2.4+
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sri_hash = _hash_to_sri("sha256", new_sha256)
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# retrieve the old output hash for a more precise match
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if old_hash := _get_attr_value(f"{attr_path}.src.outputHash"):
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# fetchers can specify a sha256, or a sri hash
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try:
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text = _replace_value("hash", sri_hash, text, old_hash)
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except ValueError:
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text = _replace_value("sha256", sri_hash, text, old_hash)
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else:
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raise ValueError(f"Unable to retrieve old hash for {pname}")
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if fetcher == "fetchFromGitHub":
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# in the case of fetchFromGitHub, it's common to see `rev = version;` or `rev = "v${version}";`
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# in which no string value is meant to be substituted. However, we can just overwrite the previous value.
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regex = r"(rev\s+=\s+[^;]*;)"
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regex = re.compile(regex)
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matches = regex.findall(text)
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n = len(matches)
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if n == 0:
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raise ValueError("Unable to find rev value for {}.".format(pname))
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else:
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# forcefully rewrite rev, incase tagging conventions changed for a release
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match = matches[0]
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text = text.replace(match, f'rev = "refs/tags/{prefix}${{version}}";')
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# incase there's no prefix, just rewrite without interpolation
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text = text.replace('"${version}";', "version;")
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with open(path, "w") as f:
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f.write(text)
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logging.info(
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"Path {}: updated {} from {} to {}".format(
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path, pname, version, new_version
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)
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)
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result = {
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"path": path,
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"target": target,
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"pname": pname,
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"old_version": version,
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"new_version": new_version,
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#'fetcher' : fetcher,
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}
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return result
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def _update(path, target):
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# We need to read and modify a Nix expression.
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if os.path.isdir(path):
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path = os.path.join(path, "default.nix")
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# If a default.nix does not exist, we quit.
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if not os.path.isfile(path):
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logging.info("Path {}: does not exist.".format(path))
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return False
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# If file is not a Nix expression, we quit.
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if not path.endswith(".nix"):
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logging.info("Path {}: does not end with `.nix`.".format(path))
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return False
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try:
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return _update_package(path, target)
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except ValueError as e:
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logging.warning("Path {}: {}".format(path, e))
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return False
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def _commit(path, pname, old_version, new_version, pkgs_prefix="python: ", **kwargs):
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"""Commit result."""
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msg = f"{pkgs_prefix}{pname}: {old_version} -> {new_version}"
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if changelog := _get_attr_value(f"{pkgs_prefix}{pname}.meta.changelog"):
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msg += f"\n\n{changelog}"
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try:
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subprocess.check_call([GIT, "add", path])
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subprocess.check_call([GIT, "commit", "-m", msg])
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except subprocess.CalledProcessError as e:
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|
subprocess.check_call([GIT, "checkout", path])
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|
raise subprocess.CalledProcessError(f"Could not commit {path}") from e
|
|
|
|
return True
|
|
|
|
|
|
def main():
|
|
epilog = """
|
|
environment variables:
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|
GITHUB_API_TOKEN\tGitHub API token used when updating github packages
|
|
"""
|
|
parser = argparse.ArgumentParser(
|
|
formatter_class=argparse.RawDescriptionHelpFormatter, epilog=epilog
|
|
)
|
|
parser.add_argument("package", type=str, nargs="+")
|
|
parser.add_argument("--target", type=str, choices=SEMVER.keys(), default="major")
|
|
parser.add_argument(
|
|
"--commit", action="store_true", help="Create a commit for each package update"
|
|
)
|
|
parser.add_argument(
|
|
"--use-pkgs-prefix",
|
|
action="store_true",
|
|
help="Use python3Packages.${pname}: instead of python: ${pname}: when making commits",
|
|
)
|
|
|
|
args = parser.parse_args()
|
|
target = args.target
|
|
|
|
packages = list(map(os.path.abspath, args.package))
|
|
|
|
if len(packages) > 1:
|
|
global BULK_UPDATE
|
|
BULK_UPDATE = True
|
|
|
|
logging.info("Updating packages...")
|
|
|
|
# Use threads to update packages concurrently
|
|
with Pool() as p:
|
|
results = list(filter(bool, p.map(lambda pkg: _update(pkg, target), packages)))
|
|
|
|
logging.info("Finished updating packages.")
|
|
|
|
commit_options = {}
|
|
if args.use_pkgs_prefix:
|
|
logging.info("Using python3Packages. prefix for commits")
|
|
commit_options["pkgs_prefix"] = "python3Packages."
|
|
|
|
# Commits are created sequentially.
|
|
if args.commit:
|
|
logging.info("Committing updates...")
|
|
# list forces evaluation
|
|
list(map(lambda x: _commit(**x, **commit_options), results))
|
|
logging.info("Finished committing updates")
|
|
|
|
count = len(results)
|
|
logging.info("{} package(s) updated".format(count))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|