diskutil_completion /

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This is a completion file and python script to aid in the usage of darwin's diskutil command.

The combination is used because it is far more pleasant to write the completion logic in Python than in Bash

To instal and use:

copy the diskutil_completion file anywhere on your hardrive for example /usr/local/etc

copy the script somewhere on your path (/usr/local/bin) and make sure its executable 

add the following line to your .bashrc file:

. /usr/local/etc/diskutil_completion

source your .bashrc folder, or just open a new terminal window for it to take effect

A couple quick notes:

To improve the performance of the disk listing, I experimented with a caching of the disk info - its disabled by default as it only speeds subsequent listings which in use aren't really needed.  To enable set the flag at the top of the script

diskutil is unorthodox for bash in that some parameters (namely format) contain spaces.  I try to work around that best I can, but there are still a couple oddities.