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File Manager

Path: /opt/cloudlinux/venv/lib64/python3.11/site-packages/gitdb/db/

Viewing File: ref.py

# Copyright (C) 2010, 2011 Sebastian Thiel (byronimo@gmail.com) and contributors
#
# This module is part of GitDB and is released under
# the New BSD License: http://www.opensource.org/licenses/bsd-license.php
import codecs
from gitdb.db.base import (
    CompoundDB,
)

__all__ = ('ReferenceDB', )


class ReferenceDB(CompoundDB):

    """A database consisting of database referred to in a file"""

    # Configuration
    # Specifies the object database to use for the paths found in the alternates
    # file. If None, it defaults to the GitDB
    ObjectDBCls = None

    def __init__(self, ref_file):
        super().__init__()
        self._ref_file = ref_file

    def _set_cache_(self, attr):
        if attr == '_dbs':
            self._dbs = list()
            self._update_dbs_from_ref_file()
        else:
            super()._set_cache_(attr)
        # END handle attrs

    def _update_dbs_from_ref_file(self):
        dbcls = self.ObjectDBCls
        if dbcls is None:
            # late import
            from gitdb.db.git import GitDB
            dbcls = GitDB
        # END get db type

        # try to get as many as possible, don't fail if some are unavailable
        ref_paths = list()
        try:
            with codecs.open(self._ref_file, 'r', encoding="utf-8") as f:
                ref_paths = [l.strip() for l in f]
        except OSError:
            pass
        # END handle alternates

        ref_paths_set = set(ref_paths)
        cur_ref_paths_set = {db.root_path() for db in self._dbs}

        # remove existing
        for path in (cur_ref_paths_set - ref_paths_set):
            for i, db in enumerate(self._dbs[:]):
                if db.root_path() == path:
                    del(self._dbs[i])
                    continue
                # END del matching db
        # END for each path to remove

        # add new
        # sort them to maintain order
        added_paths = sorted(ref_paths_set - cur_ref_paths_set, key=lambda p: ref_paths.index(p))
        for path in added_paths:
            try:
                db = dbcls(path)
                # force an update to verify path
                if isinstance(db, CompoundDB):
                    db.databases()
                # END verification
                self._dbs.append(db)
            except Exception:
                # ignore invalid paths or issues
                pass
        # END for each path to add

    def update_cache(self, force=False):
        # re-read alternates and update databases
        self._update_dbs_from_ref_file()
        return super().update_cache(force)