Fix Python virtualenvs broken by a change of Python location. Intended to be used with Homebrew, whose Python installation path contains the version number and so changes on upgrades.

virtualenv-fix.sh

#!/bin/sh

# Find and delete broken symbolic links, which cause virtualenv to balk.
# "-L" resolves symbolic links to their destination if possible, meaning
# that if the filename is still a link ("-type l"), it's a broken one.
# Since "-L" doesn't work with "-delete", this calls "rm" instead.
find -L $1 -type l -exec rm -- {} +

# Just run virtualenv again to handle the rest.
virtualenv $1