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Utility functions for simple, timestamp-based dependency of files
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timestamp dependency analysis.� N)�DistutilsFileErrorc C s` t jj| �s tdt jj| � ��t jj|�s0dS ddlm} t j| �| }t j|�| }||kS )a Return true if 'source' exists and is more recently modified than
'target', or if 'source' exists and 'target' doesn't. Return false if
both exist and 'target' is the same age or younger than 'source'.
Raise DistutilsFileError if 'source' does not exist.
zfile '%s' does not exist� r )�ST_MTIME)�os�path�existsr �abspath�statr )�source�targetr Zmtime1Zmtime2� r �*/usr/lib64/python3.6/distutils/dep_util.py�newer s r c C sl t | �t |�krtd��g }g }xBtt | ��D ]2}t| | || �r.|j| | � |j|| � q.W ||fS )z�Walk two filename lists in parallel, testing if each source is newer
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default ("error") is to blow up with an OSError from inside 'stat()';
if it is "ignore", we silently drop any missing source files; if it is
"newer", any missing source files make us assume that 'target' is
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