buildPython*: add updateScript to passthru
All Python packages now have an updateScript. The script calls `update-python-libraries` and passes it the position of the derivation expression obtained using `meta.position`. This works fine in case a Nix expression represents only a single derivation. If there are more in it, `update-python-libraries` will fail.
This commit is contained in:
Frederik Rietdijk
Frederik Rietdijk
parent
82579f80a5
commit
74d0b82f29
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@ -1,361 +1,3 @@
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#! /usr/bin/env nix-shell
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#! nix-shell -i python3 -p "python3.withPackages(ps: with ps; [ packaging requests toolz ])" -p git
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#!/bin/sh
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exec nix-shell -p "python3.withPackages(ps: with ps; [ packaging requests toolz ])" -p git --run pkgs/development/interpreters/python/update-python-libraries/update-python-libraries.py
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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/*
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``
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to update all libraries in that folder.
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"""
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import argparse
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import logging
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import os
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import re
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import requests
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import toolz
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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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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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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
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def _get_latest_version_github(package, extension, current_version, target):
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raise ValueError("updating from GitHub is not yet supported.")
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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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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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raise ValueError('updating from GitHub is not yet implemented.')
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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 = 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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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, **kwargs):
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"""Commit result.
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"""
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msg = f'python: {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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parser = argparse.ArgumentParser()
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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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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(p.map(lambda pkg: _update(pkg, target), packages))
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logging.info("Finished updating packages.")
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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(map(lambda x: _commit(**x), filter(bool, results)))
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logging.info("Finished committing updates")
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count = sum(map(bool, 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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@ -12,6 +12,8 @@
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, namePrefix
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, bootstrapped-pip
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, flit
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, writeScript
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, update-python-libraries
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}:
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let
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@ -20,7 +22,8 @@ let
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wheel-specific = import ./build-python-package-wheel.nix { };
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common = import ./build-python-package-common.nix { inherit python bootstrapped-pip; };
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mkPythonDerivation = import ./mk-python-derivation.nix {
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inherit lib config python wrapPython setuptools unzip ensureNewerSourcesForZipFilesHook toPythonModule namePrefix;
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inherit lib config python wrapPython setuptools unzip ensureNewerSourcesForZipFilesHook;
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inherit toPythonModule namePrefix writeScript update-python-libraries;
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};
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in
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@ -10,6 +10,8 @@
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# Whether the derivation provides a Python module or not.
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, toPythonModule
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, namePrefix
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, writeScript
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, update-python-libraries
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}:
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{ name ? "${attrs.pname}-${attrs.version}"
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@ -64,7 +66,7 @@ if disabled
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then throw "${name} not supported for interpreter ${python.executable}"
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else
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toPythonModule (python.stdenv.mkDerivation (builtins.removeAttrs attrs [
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let self = toPythonModule (python.stdenv.mkDerivation (builtins.removeAttrs attrs [
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"disabled" "checkInputs" "doCheck" "doInstallCheck" "dontWrapPythonPrograms" "catchConflicts"
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] // {
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@ -106,4 +108,14 @@ toPythonModule (python.stdenv.mkDerivation (builtins.removeAttrs attrs [
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platforms = python.meta.platforms;
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isBuildPythonPackage = python.meta.platforms;
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} // meta;
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}))
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}));
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passthru = {
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updateScript = let
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filename = builtins.head (lib.splitString ":" self.meta.position);
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in writeScript "update-python" ''
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#!${python.stdenv.shell}
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${update-python-libraries} ${filename}
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'';
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};
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in lib.extendDerivation true passthru self
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|
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@ -0,0 +1,12 @@
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{ python3, runCommand, git }:
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runCommand "update-python-libraries" {
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buildInputs = [
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(python3.withPackages(ps: with ps; [ packaging requests toolz ]))
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git
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];
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} ''
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cp ${./update-python-libraries.py} $out
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patchShebangs $out
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substituteInPlace $out --replace 'GIT = "git"' 'GIT = "${git}/bin/git"'
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''
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@ -0,0 +1,362 @@
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#!/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/*
|
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``
|
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to update all libraries in that folder.
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"""
|
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import argparse
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import logging
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import os
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import re
|
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import requests
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import toolz
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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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|
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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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|
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PRERELEASES = False
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|
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GIT = "git"
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import logging
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logging.basicConfig(level=logging.INFO)
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|
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class Version(_Version, collections.abc.Sequence):
|
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|
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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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|
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def __getitem__(self, i):
|
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return self._version.release[i]
|
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|
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def __len__(self):
|
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return len(self._version.release)
|
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|
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def __iter__(self):
|
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yield from self._version.release
|
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|
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|
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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.
|
||||
"""
|
||||
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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|
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def _get_unique_value(attribute, text):
|
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"""Match attribute in text and return unique match.
|
||||
|
||||
:returns: Single match.
|
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"""
|
||||
values = _get_values(attribute, text)
|
||||
n = len(values)
|
||||
if n > 1:
|
||||
raise ValueError("found too many values for {}".format(attribute))
|
||||
elif n == 1:
|
||||
return values[0]
|
||||
else:
|
||||
raise ValueError("no value found for {}".format(attribute))
|
||||
|
||||
def _get_line_and_value(attribute, text):
|
||||
"""Match attribute in text. Return the line and the value of the attribute."""
|
||||
regex = '({}\s+=\s+"(.*)";)'.format(attribute)
|
||||
regex = re.compile(regex)
|
||||
value = regex.findall(text)
|
||||
n = len(value)
|
||||
if n > 1:
|
||||
raise ValueError("found too many values for {}".format(attribute))
|
||||
elif n == 1:
|
||||
return value[0]
|
||||
else:
|
||||
raise ValueError("no value found for {}".format(attribute))
|
||||
|
||||
|
||||
def _replace_value(attribute, value, text):
|
||||
"""Search and replace value of attribute in text."""
|
||||
old_line, old_value = _get_line_and_value(attribute, text)
|
||||
new_line = old_line.replace(old_value, value)
|
||||
new_text = text.replace(old_line, new_line)
|
||||
return new_text
|
||||
|
||||
def _fetch_page(url):
|
||||
r = requests.get(url)
|
||||
if r.status_code == requests.codes.ok:
|
||||
return r.json()
|
||||
else:
|
||||
raise ValueError("request for {} failed".format(url))
|
||||
|
||||
|
||||
SEMVER = {
|
||||
'major' : 0,
|
||||
'minor' : 1,
|
||||
'patch' : 2,
|
||||
}
|
||||
|
||||
|
||||
def _determine_latest_version(current_version, target, versions):
|
||||
"""Determine latest version, given `target`.
|
||||
"""
|
||||
current_version = Version(current_version)
|
||||
|
||||
def _parse_versions(versions):
|
||||
for v in versions:
|
||||
try:
|
||||
yield Version(v)
|
||||
except InvalidVersion:
|
||||
pass
|
||||
|
||||
versions = _parse_versions(versions)
|
||||
|
||||
index = SEMVER[target]
|
||||
|
||||
ceiling = list(current_version[0:index])
|
||||
if len(ceiling) == 0:
|
||||
ceiling = None
|
||||
else:
|
||||
ceiling[-1]+=1
|
||||
ceiling = Version(".".join(map(str, ceiling)))
|
||||
|
||||
# We do not want prereleases
|
||||
versions = SpecifierSet(prereleases=PRERELEASES).filter(versions)
|
||||
|
||||
if ceiling is not None:
|
||||
versions = SpecifierSet(f"<{ceiling}").filter(versions)
|
||||
|
||||
return (max(sorted(versions))).raw_version
|
||||
|
||||
|
||||
def _get_latest_version_pypi(package, extension, current_version, target):
|
||||
"""Get latest version and hash from PyPI."""
|
||||
url = "{}/{}/json".format(INDEX, package)
|
||||
json = _fetch_page(url)
|
||||
|
||||
versions = json['releases'].keys()
|
||||
version = _determine_latest_version(current_version, target, versions)
|
||||
|
||||
try:
|
||||
releases = json['releases'][version]
|
||||
except KeyError as e:
|
||||
raise KeyError('Could not find version {} for {}'.format(version, package)) from e
|
||||
for release in releases:
|
||||
if release['filename'].endswith(extension):
|
||||
# TODO: In case of wheel we need to do further checks!
|
||||
sha256 = release['digests']['sha256']
|
||||
break
|
||||
else:
|
||||
sha256 = None
|
||||
return version, sha256
|
||||
|
||||
|
||||
def _get_latest_version_github(package, extension, current_version, target):
|
||||
raise ValueError("updating from GitHub is not yet supported.")
|
||||
|
||||
|
||||
FETCHERS = {
|
||||
'fetchFromGitHub' : _get_latest_version_github,
|
||||
'fetchPypi' : _get_latest_version_pypi,
|
||||
'fetchurl' : _get_latest_version_pypi,
|
||||
}
|
||||
|
||||
|
||||
DEFAULT_SETUPTOOLS_EXTENSION = 'tar.gz'
|
||||
|
||||
|
||||
FORMATS = {
|
||||
'setuptools' : DEFAULT_SETUPTOOLS_EXTENSION,
|
||||
'wheel' : 'whl'
|
||||
}
|
||||
|
||||
def _determine_fetcher(text):
|
||||
# Count occurences of fetchers.
|
||||
nfetchers = sum(text.count('src = {}'.format(fetcher)) for fetcher in FETCHERS.keys())
|
||||
if nfetchers == 0:
|
||||
raise ValueError("no fetcher.")
|
||||
elif nfetchers > 1:
|
||||
raise ValueError("multiple fetchers.")
|
||||
else:
|
||||
# Then we check which fetcher to use.
|
||||
for fetcher in FETCHERS.keys():
|
||||
if 'src = {}'.format(fetcher) in text:
|
||||
return fetcher
|
||||
|
||||
|
||||
def _determine_extension(text, fetcher):
|
||||
"""Determine what extension is used in the expression.
|
||||
|
||||
If we use:
|
||||
- fetchPypi, we check if format is specified.
|
||||
- fetchurl, we determine the extension from the url.
|
||||
- fetchFromGitHub we simply use `.tar.gz`.
|
||||
"""
|
||||
if fetcher == 'fetchPypi':
|
||||
try:
|
||||
src_format = _get_unique_value('format', text)
|
||||
except ValueError as e:
|
||||
src_format = None # format was not given
|
||||
|
||||
try:
|
||||
extension = _get_unique_value('extension', text)
|
||||
except ValueError as e:
|
||||
extension = None # extension was not given
|
||||
|
||||
if extension is None:
|
||||
if src_format is None:
|
||||
src_format = 'setuptools'
|
||||
elif src_format == 'flit':
|
||||
raise ValueError("Don't know how to update a Flit package.")
|
||||
extension = FORMATS[src_format]
|
||||
|
||||
elif fetcher == 'fetchurl':
|
||||
url = _get_unique_value('url', text)
|
||||
extension = os.path.splitext(url)[1]
|
||||
if 'pypi' not in url:
|
||||
raise ValueError('url does not point to PyPI.')
|
||||
|
||||
elif fetcher == 'fetchFromGitHub':
|
||||
raise ValueError('updating from GitHub is not yet implemented.')
|
||||
|
||||
return extension
|
||||
|
||||
|
||||
def _update_package(path, target):
|
||||
|
||||
# Read the expression
|
||||
with open(path, 'r') as f:
|
||||
text = f.read()
|
||||
|
||||
# Determine pname.
|
||||
pname = _get_unique_value('pname', text)
|
||||
|
||||
# Determine version.
|
||||
version = _get_unique_value('version', text)
|
||||
|
||||
# First we check how many fetchers are mentioned.
|
||||
fetcher = _determine_fetcher(text)
|
||||
|
||||
extension = _determine_extension(text, fetcher)
|
||||
|
||||
new_version, new_sha256 = FETCHERS[fetcher](pname, extension, version, target)
|
||||
|
||||
if new_version == version:
|
||||
logging.info("Path {}: no update available for {}.".format(path, pname))
|
||||
return False
|
||||
elif Version(new_version) <= Version(version):
|
||||
raise ValueError("downgrade for {}.".format(pname))
|
||||
if not new_sha256:
|
||||
raise ValueError("no file available for {}.".format(pname))
|
||||
|
||||
text = _replace_value('version', new_version, text)
|
||||
text = _replace_value('sha256', new_sha256, text)
|
||||
|
||||
with open(path, 'w') as f:
|
||||
f.write(text)
|
||||
|
||||
logging.info("Path {}: updated {} from {} to {}".format(path, pname, version, new_version))
|
||||
|
||||
result = {
|
||||
'path' : path,
|
||||
'target': target,
|
||||
'pname': pname,
|
||||
'old_version' : version,
|
||||
'new_version' : new_version,
|
||||
#'fetcher' : fetcher,
|
||||
}
|
||||
|
||||
return result
|
||||
|
||||
|
||||
def _update(path, target):
|
||||
|
||||
# We need to read and modify a Nix expression.
|
||||
if os.path.isdir(path):
|
||||
path = os.path.join(path, 'default.nix')
|
||||
|
||||
# If a default.nix does not exist, we quit.
|
||||
if not os.path.isfile(path):
|
||||
logging.info("Path {}: does not exist.".format(path))
|
||||
return False
|
||||
|
||||
# If file is not a Nix expression, we quit.
|
||||
if not path.endswith(".nix"):
|
||||
logging.info("Path {}: does not end with `.nix`.".format(path))
|
||||
return False
|
||||
|
||||
try:
|
||||
return _update_package(path, target)
|
||||
except ValueError as e:
|
||||
logging.warning("Path {}: {}".format(path, e))
|
||||
return False
|
||||
|
||||
|
||||
def _commit(path, pname, old_version, new_version, **kwargs):
|
||||
"""Commit result.
|
||||
"""
|
||||
|
||||
msg = f'python: {pname}: {old_version} -> {new_version}'
|
||||
|
||||
try:
|
||||
subprocess.check_call([GIT, 'add', path])
|
||||
subprocess.check_call([GIT, 'commit', '-m', msg])
|
||||
except subprocess.CalledProcessError as e:
|
||||
subprocess.check_call([GIT, 'checkout', path])
|
||||
raise subprocess.CalledProcessError(f'Could not commit {path}') from e
|
||||
|
||||
return True
|
||||
|
||||
|
||||
def main():
|
||||
|
||||
parser = argparse.ArgumentParser()
|
||||
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')
|
||||
|
||||
args = parser.parse_args()
|
||||
target = args.target
|
||||
|
||||
packages = list(map(os.path.abspath, args.package))
|
||||
|
||||
logging.info("Updating packages...")
|
||||
|
||||
# Use threads to update packages concurrently
|
||||
with Pool() as p:
|
||||
results = list(p.map(lambda pkg: _update(pkg, target), packages))
|
||||
|
||||
logging.info("Finished updating packages.")
|
||||
|
||||
# Commits are created sequentially.
|
||||
if args.commit:
|
||||
logging.info("Committing updates...")
|
||||
list(map(lambda x: _commit(**x), filter(bool, results)))
|
||||
logging.info("Finished committing updates")
|
||||
|
||||
count = sum(map(bool, results))
|
||||
logging.info("{} package(s) updated".format(count))
|
||||
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
main()
|
||||
|
|
@ -7916,6 +7916,8 @@ in
|
|||
python37Packages = recurseIntoAttrs python37.pkgs;
|
||||
pypyPackages = pypy.pkgs;
|
||||
|
||||
update-python-libraries = callPackage ../development/interpreters/python/update-python-libraries { };
|
||||
|
||||
# Should eventually be moved inside Python interpreters.
|
||||
python-setup-hook = callPackage ../development/interpreters/python/setup-hook.nix { };
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue