/brz/remove-bazaar

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More work on roundtrip push support.

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cache.py
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        """
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        raise NotImplementedError(self.lookup_tree_id)
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    def lookup_commit(self, revid):
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        """Retrieve a Git commit SHA by Bazaar revision id.
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        """
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        raise NotImplementedError(self.lookup_commit)
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    def revids(self):
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        """List the revision ids known."""
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        raise NotImplementedError(self.revids)
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TdbBzrGitCache = lambda p: BzrGitCache(TdbGitShaMap(p), None, TdbCacheUpdater)
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class TdbGitCacheFormat(BzrGitCacheFormat):
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    """Cache format for tdb-based caches."""
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    def open(self, transport):
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        try:
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            basepath = transport.local_abspath(".").encode(osutils._fs_enc)
 
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            basepath = transport.local_abspath(".")
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        except bzrlib.errors.NotLocalUrl:
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            basepath = get_cache_dir()
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        assert isinstance(basepath, str)
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        try:
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            return TdbBzrGitCache(os.path.join(basepath, "idmap.tdb"))
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        except ImportError:
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        if path is None:
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            self.db = {}
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        else:
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            assert isinstance(path, str)
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            if not mapdbs().has_key(path):
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                mapdbs()[path] = tdb.Tdb(path, self.TDB_HASH_SIZE, tdb.DEFAULT,
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                                          os.O_RDWR|os.O_CREAT)