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import ssl
import urllib.request
import json
from typing import Dict, Any
from ..general import SysCommand
from ..models import PackageSearch, PackageSearchResult, LocalPackage
from ..exceptions import PackageError, SysCallError, RequirementError
BASE_URL_PKG_SEARCH = 'https://archlinux.org/packages/search/json/?name={package}'
# BASE_URL_PKG_CONTENT = 'https://archlinux.org/packages/search/json/'
BASE_GROUP_URL = 'https://archlinux.org/groups/x86_64/{group}/'
def find_group(name :str) -> bool:
# TODO UPSTREAM: Implement /json/ for the groups search
ssl_context = ssl.create_default_context()
ssl_context.check_hostname = False
ssl_context.verify_mode = ssl.CERT_NONE
try:
response = urllib.request.urlopen(BASE_GROUP_URL.format(group=name), context=ssl_context)
except urllib.error.HTTPError as err:
if err.code == 404:
return False
else:
raise err
# Just to be sure some code didn't slip through the exception
if response.code == 200:
return True
return False
def package_search(package :str) -> PackageSearch:
"""
Finds a specific package via the package database.
It makes a simple web-request, which might be a bit slow.
"""
# TODO UPSTREAM: Implement bulk search, either support name=X&name=Y or split on space (%20 or ' ')
# TODO: utilize pacman cache first, upstream second.
ssl_context = ssl.create_default_context()
ssl_context.check_hostname = False
ssl_context.verify_mode = ssl.CERT_NONE
response = urllib.request.urlopen(BASE_URL_PKG_SEARCH.format(package=package), context=ssl_context)
if response.code != 200:
raise PackageError(f"Could not locate package: [{response.code}] {response}")
data = response.read().decode('UTF-8')
return PackageSearch(**json.loads(data))
class IsGroup(BaseException):
pass
def find_package(package :str) -> PackageSearchResult:
data = package_search(package)
if not data.results:
# Check if the package is actually a group
if find_group(package):
# TODO: Until upstream adds a JSON result for group searches
# there is no way we're going to parse HTML reliably.
raise IsGroup("Implement group search")
raise PackageError(f"Could not locate {package} while looking for repository category")
# If we didn't find the package in the search results,
# odds are it's a group package
for result in data.results:
if result.pkgname == package:
return result
raise PackageError(f"Could not locate {package} in result while looking for repository category")
def find_packages(*names :str) -> Dict[str, Any]:
"""
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.
"""
return {package: find_package(package) for package in names}
def validate_package_list(packages: list) -> bool:
"""
Validates a list of given packages.
Raises `RequirementError` if one or more packages are not found.
"""
invalid_packages = [
package
for package in packages
if not find_package(package)['results'] and not find_group(package)
]
if invalid_packages:
raise RequirementError(f"Invalid package names: {invalid_packages}")
return True
def installed_package(package :str) -> LocalPackage:
package_info = {}
try:
for line in SysCommand(f"pacman -Q --info {package}"):
if b':' in line:
key, value = line.decode().split(':', 1)
package_info[key.strip().lower().replace(' ', '_')] = value.strip()
except SysCallError:
pass
return LocalPackage(**package_info)
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