I've created a little script for my personal use that creates .mobi files from any .epub files that don't already have a .mobi counterpart using ebook-convert.
This is my very, very first script in Python. (Usually write things like this in bash.) So it has a good deal of limitations: it only works on one directory at a time, it assumes that the name of the file between epub and mobi versions is constant, and I'm sure it has a thousand other limitations. It handles white space in the filenames fine. I've only tested it in linux environments...so I doubt it is windows friendly.
You can find the script here:http://pastebin.com/0HpA7dy0
. You need to feed it one argument: the directory it should search for epubs/mobis. For example:
python mobimaker.sh /home/jmeb/ebooks
I welcome any feedback or improvements. Again, my very first go at python.
Thanks for the wonderful software to base this on, and the community round here (been lurking around for a while.)