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z@This is most likely a transient problem, please try again later.z�If none of this applies, then please report this bug using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. z�If you want to investigate this yourself the log files in '/var/log/dist-upgrade' will contain details about the upgrade. Specifically, look at 'main.log' and 'apt.log'.z Could not calculate the upgradezDist-upgrade failed: '%s'Fr r2 �AllowUnauthenticatedzAllowUnauthenticated set!z!Packages to downgrade found: '%s'� z$Unauthenticated packages found: '%s'z"Error authenticating some packagesz�It was not possible to authenticate some packages. This may be a transient network problem. You may want to try again later. See below for a list of unauthenticated packages.�
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zy this function tests if the current changes don't violate
our constraints (deny listed removals etc)
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����zMyCache._verifyChangesc C sn |j j�|j�}|du rtd|j� dS |jdu r$td| j�� � dS |j�d�\}}|j j� ||f� dS )a
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the old version is still installed
NzNo candidate ver: FzNo file_list for: %s r T)
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��zMyCache.installTasksc C s$ | j �dd�D ]}| �|d� qd S )Nr2 � BaseMetaPkgsz%base meta package keep installed rule)rD rE r� )r' r@ rc r r r r( V s �z"MyCache._keepBaseMetaPkgsInstalledc s� � �fdd�}�j �dd�� �j �dd�D ]}�| �� q� D ]:}z |�v r>�| jr>�| jr>t�d| � �| �� W q tyZ } zt� d||f � W Y d }~q d }~ww |� s�t�d� � � D ]d}d }�j �|d
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� �� ���z!MyCache.tryMarkObsoleteForRemovalc C s0 t � }| D ]}|jr| �|�s|�|j� q|S �z1 get all package names that are not downloadable )rX r] �anyVersionDownloadablerj rk )r' �
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�z MyCache.anyVersionDownloadablec C s4 t � }| D ]}|jr| j�|j�r|�|j� q|S ro )rX r] r� r� r^ rj rk )r' �unused_dependenciesrc r r r �_getUnusedDependencies� s �z MyCache._getUnusedDependenciesc C s� t � }| j�dd�}tj�|�r5t|��}|D ]}|�d�s%|�|� � � qW d � n1 s0w Y t � }|D ] }|| vrAq:| | }|j
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�� � �� z&MyCache.get_installed_demoted_packagesc C s~ t � }| D ]7}|jr<| �|�r<|jsqd}|jjD ]}||jv r'|j|kr'd}||jv r3|j|kr3d}q|r<|�|j� q|S )zm get all packages that are installed from a foreign repo
(and are actually downloadable)
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this checks if we have enough free space on /var, /boot and /usr
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c @ r, )z)MyCache.checkFreeSpace.<locals>.FreeSpacez@ helper class that represents the free space on each mounted fs c S s || _ d| _d S r� )�freer
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