ANTsX
Environment variable for antsxnet_cache_directory
The default cache directory of "~/.keras/ANTsXNet" is troublesome for Singularity users because singularity has to run as the user calling singularity, so users either have to mount their own home directory or ensure every call to get_antsxnet_data or get_pretrained_network specifies antsxnet_cache_directory (with an absolute path) at run time.
I've tried using TF_CACHE_DIR and KERAS_HOME, but they don't work with the tensorflow.keras.utils.get_file function.
So I was thinking of having a variable ANTSXNET_CACHE_DIR, so that data / network downloads would go to
antsxnet_cache_directory if defined in the function call
else
os.environ['ANTSXNET_CACHE_DIR'] if defined
else
~/.keras/ANTsXNet (current default).
Happy to make a PR for this, but wanted to check in first @stnava @ntustison (+anyone else with an opinion)
We'd also have to port this over to ANTsRNet but this sounds like a really good idea. In the interest of simplification, what would you think about just removing the variable antsxnet_cache_directory in favor of the the environmental variable with the default still being ~/.keras/ANTsXNet/?
