432 lines
13 KiB
Python
Executable file
432 lines
13 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 os
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import pathlib
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import re
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import requests
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from concurrent.futures import ThreadPoolExecutor as Pool
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from packaging.version import Version as _Version
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from packaging.version import InvalidVersion
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from packaging.specifiers import SpecifierSet
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import collections
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import subprocess
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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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GIT = "git"
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NIXPGKS_ROOT = subprocess.check_output(["git", "rev-parse", "--show-toplevel"]).decode('utf-8').strip()
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import logging
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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 = '{}\s+=\s+"(.*)";'.format(attribute)
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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_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):
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"""Match attribute in text. Return the line and the value of the attribute."""
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regex = '({}\s+=\s+"(.*)";)'.format(attribute)
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regex = re.compile(regex)
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value = regex.findall(text)
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n = len(value)
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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 value[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):
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"""Search and replace value of attribute in text."""
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old_line, old_value = _get_line_and_value(attribute, text)
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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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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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"""
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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(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('Could not find version {} for {}'.format(version, package)) 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(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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# 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.{package}")
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try:
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homepage = subprocess.check_output(
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["nix", "eval", "-f", f"{NIXPGKS_ROOT}/default.nix", "--raw", f"{attr_path}.src.meta.homepage"])\
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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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sha256 = subprocess.check_output(["nix-prefetch-url", "--type", "sha256", "--unpack", f"{release['tarball_url']}"], stderr=subprocess.DEVNULL)\
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.decode('utf-8').strip()
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return version, sha256, 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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}
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def _determine_fetcher(text):
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# Count occurences of fetchers.
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nfetchers = sum(text.count('src = {}'.format(fetcher)) for fetcher in FETCHERS.keys())
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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 as e:
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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 as e:
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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 == 'flit':
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raise ValueError("Don't know how to update a Flit package.")
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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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elif src_format == 'pyproject':
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raise ValueError("Don't know how to update a pyproject 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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if "fetchSubmodules" in text:
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raise ValueError("fetchFromGitHub fetcher doesn't support submodules")
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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.
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pname = _get_unique_value('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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new_version, new_sha256, prefix = FETCHERS[fetcher](pname, extension, version, target)
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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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text = _replace_value('sha256', new_sha256, text)
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if fetcher == 'fetchFromGitHub':
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text = _replace_value('rev', f"{prefix}${{version}}", text)
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# incase there's no prefix, just rewrite without interpolation
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text = text.replace('"${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("Path {}: updated {} from {} to {}".format(path, pname, version, new_version))
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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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"""
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msg = f'{pkgs_prefix}{pname}: {old_version} -> {new_version}'
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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
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return True
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def main():
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epilog = """
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environment variables:
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GITHUB_API_TOKEN\tGitHub API token used when updating github packages
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"""
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parser = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter, epilog=epilog)
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parser.add_argument('package', type=str, nargs='+')
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parser.add_argument('--target', type=str, choices=SEMVER.keys(), default='major')
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parser.add_argument('--commit', action='store_true', help='Create a commit for each package update')
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parser.add_argument('--use-pkgs-prefix', action='store_true', help='Use python3Packages.${pname}: instead of python: ${pname}: when making commits')
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args = parser.parse_args()
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target = args.target
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packages = list(map(os.path.abspath, args.package))
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logging.info("Updating packages...")
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# Use threads to update packages concurrently
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with Pool() as p:
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results = list(filter(bool, p.map(lambda pkg: _update(pkg, target), packages)))
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logging.info("Finished updating packages.")
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commit_options = {}
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if args.use_pkgs_prefix:
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logging.info("Using python3Packages. prefix for commits")
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commit_options["pkgs_prefix"] = "python3Packages."
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# Commits are created sequentially.
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if args.commit:
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logging.info("Committing updates...")
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# list forces evaluation
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list(map(lambda x: _commit(**x, **commit_options), results))
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logging.info("Finished committing updates")
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count = len(results)
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logging.info("{} package(s) updated".format(count))
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if __name__ == '__main__':
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main()
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