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Utility methods.
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Standard error data was received where it was not expected. This is a
subclass of L{IOError} to preserve backward compatibility with the previous
error behavior of L{getProcessOutput}.
@ivar processEnded: A L{Deferred} which will fire when the process which
produced the data on stderr has ended (exited and all file descriptors
closed).
c �D � t j | d|��� || _ y )Nz got stderr: )�IOError�__init__� processEnded)�self�textr s r r z _UnexpectedErrorOutput.__init__* s! � ����� �d�X� 6�7� (��r N)�__name__�
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Trivial protocol for communicating with a process and turning its output
into the result of a L{Deferred}.
@ivar deferred: A L{Deferred} which will be called back with all of stdout
and, if C{errortoo} is true, all of stderr as well (mixed together in
one string). If C{errortoo} is false and any bytes are received over
stderr, this will fire with an L{_UnexpectedErrorOutput} instance and
the attribute will be set to L{None}.
@ivar onProcessEnded: If C{errortoo} is false and bytes are received over
stderr, this attribute will refer to a L{Deferred} which will be called
back when the process ends. This C{Deferred} is also associated with
the L{_UnexpectedErrorOutput} which C{deferred} fires with earlier in
this case so that users can determine when the process has actually
ended, in addition to knowing when bytes have been received via stderr.
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| _ y �N)�deferredr �s�errReceivedIsGood� errReceived�errReceivedIsBad)r r* �errortoos r r z_BackRelay.__init__B s1 � � ��
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�onProcessEndedr �errbackr �Failure� transport�loseConnection)r r! �errs r r. z_BackRelay.errReceivedIsBadJ sd � � �=�=� $�"'�.�.�"2�D� �(��t�/B�/B�C�C� �M�M� !� !�'�/�/�#�"6� 7� �D�M� �N�N� )� )� +� %r c �: � | j j |� y r) �r+ �write�r r! s r r, z _BackRelay.errReceivedIsGoodR � � � ��� � �T�r c �: � | j j |� y r) r8 r: s r � outReceivedz_BackRelay.outReceivedU r; r c �� � | j �4| j j | j j � � y | j � | j j |� y y r) )r* �callbackr+ �getvaluer1 r2 �r �reasons r r z_BackRelay.processEndedX sN � � �=�=� $� �M�M� "� "�4�6�6�?�?�#4� 5�
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Spawn a process and return its output as a deferred returning a L{bytes}.
@param executable: The file name to run and get the output of - the
full path should be used.
@param args: the command line arguments to pass to the process; a
sequence of strings. The first string should B{NOT} be the
executable's name.
@param env: the environment variables to pass to the process; a
dictionary of strings.
@param path: the path to run the subprocess in - defaults to the
current directory.
@param reactor: the reactor to use - defaults to the default reactor
@param errortoo: If true, include stderr in the result. If false, if
stderr is received the returned L{Deferred} will errback with an
L{IOError} instance with a C{processEnded} attribute. The
C{processEnded} attribute refers to a L{Deferred} which fires when the
executed process ends.
c � �� t | ��� S )N)r/ )r' )r r/ s �r �<lambda>z"getProcessOutput.<locals>.<lambda>y s �� �*�Q��2� r )r )r r r r r r/ s `r �getProcessOutputrF _ s �� �2 %�2�J��c�4�QX� � r c � � e Zd Zd� Zd� Zy)� _ValueGetterc � � || _ y r) )r* )r r* s r r z_ValueGetter.__init__~ s � � ��
r c �b � | j j |j j � y r) )r* r? �value�exitCoderA s r r z_ValueGetter.processEnded� s � � �
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� � �v�|�|� 4� 4�5r N)r" r# r$ r r r r r rH rH } s � �!�6r rH c �* � t t | ||||� S )z7Spawn a process and return its exit code as a Deferred.)r rH )r r r r r s r �getProcessValuerN � s � � $�\�:�t�S�$�PW� X�Xr c � � e Zd Zdd�Zd� Zd� Zy)�_EverythingGetterNc �� � || _ t � | _ t � | _ | j j | _ | j j | _ || _ y r) )r* r �outBuf�errBufr9 r= r- �
stdinBytes)r r* rT s r r z_EverythingGetter.__init__� sF � � ��
� �i�� � �i�� � �;�;�,�,��� �;�;�,�,���$��r c � � | j �A| j j d| j � | j j � y y )Nr )rT r4 � writeToChild�
closeStdin)r s r �connectionMadez _EverythingGetter.connectionMade� s; � � �?�?� &� �N�N� '� '��4�?�?� ;�
�N�N� %� %� '� 'r c �B � | j j � }| j j � }|j }|j }|j
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f� y | j j |||f� y r) ) rR r@ rS rK rL �signalr* r2 r? )r rB �outr6 �e�codes r r z _EverythingGetter.processEnded� su � ��k�k�"�"�$���k�k�"�"�$�� �L�L���z�z�� �8�8� �M�M� !� !�3��Q�X�X�"6� 7� �M�M� "� "�C��d�#3� 4r r) )r" r# r$ r rX r r r r rP rP � s � �%�(�5r rP c �0 � t t | |||||f�� S )a. Spawn a process and returns a Deferred that will be called back with
its output (from stdout and stderr) and it's exit code as (out, err, code)
If a signal is raised, the Deferred will errback with the stdout and
stderr up to that point, along with the signal, as (out, err, signalNum)
)r )r rP )r r r r r rT s r �getProcessOutputAndValuer_ � s( � � %��� � � �� �-� � r c �r � |D ]" } t j j |� �$ | S # t $ r Y �2w xY wr) )�warnings�filters�remove�
ValueError)� passthrough� addedFilters�fs r �_resetWarningFiltersrh � sF � �
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j � r|j t |� |S t d|� |S # t $ r8 t j � }t d|� |d j |d � �w xY w)a}
Run the function I{f}, but with some warnings suppressed.
This calls L{warnings.filterwarnings} to add warning filters before
invoking I{f}. If I{f} returns a L{Deferred} then the added filters are
removed once the deferred fires. Otherwise they are removed immediately.
Note that the list of warning filters is a process-wide resource, so
calling this function will affect all threads.
@param suppressedWarnings:
A list of arguments to pass to L{warnings.filterwarnings}, a sequence
of (args, kwargs) 2-tuples.
@param f: A callable, which may return a L{Deferred}.
@param a: Positional arguments passed to I{f}
@param kw: Keyword arguments passed to I{f}
@return: The result of C{f(*a, **kw)}
@seealso: L{twisted.python.util.runWithWarningsSuppressed}
functions similarly, but doesn't handled L{Deferred}s.
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Wrap C{f} in a callable which suppresses the indicated warnings before
invoking C{f} and unsuppresses them afterwards. If f returns a Deferred,
warnings will remain suppressed until the Deferred fires.
c �$ �� t ��g| ��i |��S r) )ry )ru rv rg rt s ��r �warningSuppressingWrapperz3suppressWarnings.<locals>.warningSuppressingWrapper� s �� �(�);�Q�I��I�b�I�Ir r )rg rt r| s `` r �suppressWarningsr} � s% �� � �1�X�J� �J� %�$r )ry r} rF rN r_ )Nr )r% rq ra � functoolsr �ior r r r �twisted.pythonr r r r �ProcessProtocolr' rF rH rN rP r_ rh ry r} �__all__r r r �<module>r� s� ��
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