Check if a pull will be diverged

git-check-if-pull-diverged.sh

#!/bin/sh

#
# Source: http://stackoverflow.com/questions/3258243/git-check-if-pull-needed
#
COUNT=$(git rev-list HEAD...origin/master --count)

if [ "$COUNT" -ge  "1" ]; then
    echo 'Must update'
    git pull
    echo 'Updated, will send to servers'
else
    echo 'All is fine'
fi

exit 0

LOCAL=$(git rev-parse @)
REMOTE=$(git rev-parse @{u})
BASE=$(git merge-base @ @{u})
COUNT=$(git rev-list HEAD...origin/master --count)

if [ $LOCAL = $REMOTE ]; then
    echo "Up-to-date"
elif [ $LOCAL = $BASE ]; then
    echo "Need to pull"
elif [ $REMOTE = $BASE ]; then
    echo "Need to push"
else
    echo "Diverged"
fi