···
+
#! /usr/bin/env nix-shell
+
#! nix-shell -i python3 -p 'python3.withPackages(ps: with ps; [ requests toolz ])'
+
Update a Python package expression by passing in the `.nix` file, or the directory containing it.
+
You can pass in multiple files or paths.
+
You'll likely want to use
+
$ ./update-python-libraries ../../pkgs/development/python-modules/*
+
to update all libraries in that folder.
+
INDEX = "https://pypi.io/pypi"
+
EXTENSIONS = ['tar.gz', 'tar.bz2', 'tar', 'zip', '.whl']
+
"""Permitted file extensions. These are evaluated from left to right and the first occurance is returned."""
+
def _get_value(attribute, text):
+
"""Match attribute in text and return it."""
+
regex = '{}\s+=\s+"(.*)";'.format(attribute)
+
regex = re.compile(regex)
+
value = regex.findall(text)
+
raise ValueError("Found too many values for {}".format(attribute))
+
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)
+
raise ValueError("Found too many values for {}".format(attribute))
+
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)
+
if r.status_code == requests.codes.ok:
+
logging.warning("Request for {} failed".format(url))
+
def _get_latest_version(package, extension):
+
url = "{}/{}/json".format(INDEX, package)
+
json = _fetch_page(url)
+
data = extract_relevant_nix_data(json)[1]
+
version = data['latest_version']
+
if version in data['versions']:
+
sha256 = data['versions'][version]['sha256']
+
sha256 = None # Its possible that no file was uploaded to PyPI
+
def extract_relevant_nix_data(json):
+
"""Extract relevant Nix data from the JSON of a package obtained from PyPI.
+
:param json: JSON obtained from PyPI
+
def _extract_license(json):
+
"""Extract license from JSON."""
+
return json['info']['license']
+
def _available_versions(json):
+
return json['releases'].keys()
+
def _extract_latest_version(json):
+
return json['info']['version']
+
def _get_src_and_hash(json, version, extensions):
+
"""Obtain url and hash for a given version and list of allowable extensions."""
+
if not json['releases']:
+
msg = "Package {}: No releases available.".format(json['info']['name'])
+
# We use ['releases'] and not ['urls'] because we want to have the possibility for different version.
+
for possible_file in json['releases'][version]:
+
for extension in extensions:
+
if possible_file['filename'].endswith(extension):
+
src = {'url': str(possible_file['url']),
+
'sha256': str(possible_file['digests']['sha256']),
+
msg = "Package {}: No release with valid file extension available.".format(json['info']['name'])
+
def _get_sources(json, extensions):
+
versions = _available_versions(json)
+
releases = {version: _get_src_and_hash(json, version, extensions) for version in versions}
+
releases = toolz.itemfilter(lambda x: x[1] is not None, releases)
+
name = str(json['info']['name'])
+
latest_version = str(_extract_latest_version(json))
+
#src = _get_src_and_hash(json, latest_version, EXTENSIONS)
+
sources = _get_sources(json, EXTENSIONS)
+
license = str(_extract_license(json))
+
license = license if license != "UNKNOWN" else None
+
summary = str(json['info'].get('summary')).strip('.')
+
summary = summary if summary != "UNKNOWN" else None
+
#description = str(json['info'].get('description'))
+
#description = description if description != "UNKNOWN" else None
+
homepage = json['info'].get('home_page')
+
'latest_version' : latest_version,
+
'description' : summary if summary else None,
+
#'longDescription' : description,
+
def _update_package(path):
+
# We need to read and modify a Nix expression.
+
if os.path.isdir(path):
+
path = os.path.join(path, 'default.nix')
+
if not os.path.isfile(path):
+
logging.warning("Path does not exist: {}".format(path))
+
if not path.endswith(".nix"):
+
logging.warning("Path does not end with `.nix`, skipping: {}".format(path))
+
with open(path, 'r') as f:
+
pname = _get_value('pname', text)
+
except ValueError as e:
+
logging.warning("Path {}: {}".format(path, str(e)))
+
version = _get_value('version', text)
+
except ValueError as e:
+
logging.warning("Path {}: {}".format(path, str(e)))
+
# If we use a wheel, then we need to request a wheel as well
+
format = _get_value('format', text)
+
except ValueError as e:
+
# No format mentioned, then we assume we have setuptools
+
logging.warning("Path {}: {}".format(path, str(e)))
+
url = _get_value('url', text)
+
extension = os.path.splitext(url)[1]
+
except ValueError as e:
+
logging.warning("Path {}: {}".format(path, str(e)))
+
new_version, new_sha256 = _get_latest_version(pname, extension)
+
logging.warning("Path has no valid file available: {}".format(path))
+
if new_version != version:
+
text = _replace_value('version', new_version, text)
+
except ValueError as e:
+
logging.warning("Path {}: {}".format(path, str(e)))
+
text = _replace_value('sha256', new_sha256, text)
+
except ValueError as e:
+
logging.warning("Path {}: {}".format(path, str(e)))
+
with open(path, 'w') as f:
+
logging.info("Updated {} from {} to {}".format(pname, version, new_version))
+
logging.info("No update available for {} at {}".format(pname, version))
+
parser = argparse.ArgumentParser()
+
parser.add_argument('package', type=str, nargs='+')
+
args = parser.parse_args()
+
packages = args.package
+
count = list(map(_update_package, packages))
+
#logging.info("{} package(s) updated".format(sum(count)))
+
if __name__ == '__main__':
pyrox.dev