Global git garbage collect

.gitconfig

[alias]
    global-gc = !git-global-gc.sh

git-global-gc.sh

#!/bin/sh

if [ "$#" -eq 1 ]; then
    # If we have arguments, get the dirname for the given path
    name=$(dirname "$@")

    echo "Garbage collecting $name"
    cd "$name"
    git gc --aggressive || true
    echo "Done collecting garbage in $name\n"
else
    # Use the locate database to find all .git directories
    locate .git | grep '/\.git$' | xargs -d '\n' -L1 $0
fi