Checks if there are any new changes in a repo.

repo_has_changed.sh

#!/bin/bash

# The git comamnd `git status --porcelain` 
# will return a list of files that have changed.
# We'll redirect the output to /dev/null
# so that the results of the command don't get 
# printed to the screen.

CHANGED=no
if git status --porcelain | >/dev/null ; then
    CHANGED=yes
fi


# We could also pipe the command through a grep,
# if we want to check that certain files or folders
# have changed.

CHANGED=no
if git status --porcelain | grep 'app/public/assets' | >/dev/null ;
    CHANGED=yes
fi