We have a nightly build machine at work, and every night it builds our product, which takes up a lot of disk space. As these builds accumulate, the disk runs lower and lower on space, until one night, there’s not enough space for the nightly build and it fails. In the morning, someone notices, deletes some old builds, and starts the build again.

I got sick of this absurdity, and wrote makeroom.py to clean up the disk automatically.