import urllib.request, urllib.parse import ssl, json from .exceptions import * BASE_URL = 'https://www.archlinux.org/packages/search/json/?name={package}' def find_package(name): """ Finds a specific package via the package database. It makes a simple web-request, which might be a bit slow. """ ssl_context = ssl.create_default_context() ssl_context.check_hostname = False ssl_context.verify_mode=ssl.CERT_NONE response = urllib.request.urlopen(BASE_URL.format(package=name), context=ssl_context) data = response.read().decode('UTF-8') return json.loads(data) def find_packages(*names): """ This function returns the search results for many packages. The function itself is rather slow, so consider not sending to many packages to the search query. """ result = {} for package in names: result[package] = find_package(package) return result def validate_package_list(packages :list): """ Validates a list of given packages. Raises `RequirementError` if one or more packages are not found. """ invalid_packages = [] for package in packages: if not find_package(package)['results']: invalid_packages.append(package) if invalid_packages: raise RequirementError(f"Invalid package names: {invalid_packages}") return True