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# Copyright 2014-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
import collections
from portage.versions import _pkg_str
pkg_desc_index_node = collections.namedtuple(
"pkg_desc_index_node", ["cp", "cpv_list", "desc"]
)
class pkg_node(str):
"""
A minimal package node class. For performance reasons, inputs
are not validated.
"""
def __init__(self, cp, version, repo=None):
self.__dict__["cp"] = cp
self.__dict__["repo"] = repo
self.__dict__["version"] = version
self.__dict__["build_time"] = None
def __new__(cls, cp, version, repo=None):
return str.__new__(cls, cp + "-" + version)
def __setattr__(self, name, value):
raise AttributeError(
"pkg_node instances are immutable", self.__class__, name, value
)
def pkg_desc_index_line_format(cp, pkgs, desc):
return f"{cp} {' '.join(_pkg_str(cpv).version for cpv in pkgs)}: {desc}\n"
def pkg_desc_index_line_read(line, repo=None):
try:
pkgs, desc = line.split(":", 1)
except ValueError:
return None
desc = desc.strip()
try:
cp, pkgs = pkgs.split(" ", 1)
except ValueError:
return None
cp_list = []
for ver in pkgs.split():
cp_list.append(pkg_node(cp, ver, repo))
return pkg_desc_index_node(cp, tuple(cp_list), desc)
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