Simple pre-commit hook to abort commiting if remote branch has new commits

pre-commit.sample

#!/bin/bash
#
# Checking statuses of local and remote versions of current branch
#
# If commits from these branches differ, then someone forgot to run `git pull`

echo "Checking for changes before commit:"
echo "Fetching new info..."
git fetch

# Get the name of a branch
BRANCH=`git rev-parse --abbrev-ref HEAD`
# Get count of different commits between branches
COMCOUNT=$(git rev-list HEAD..origin/"$BRANCH" --count)
# Add some colors
CGREEN='\033[0;32m'
NC='\033[0m'

if [[ "$COMCOUNT" != "0" && "$COMCOUNT" != "" ]]; then
    printf "You need to pull new changes (${CGREEN}git pull origin $BRANCH${NC}) before commiting to branch ${CGREEN}$BRANCH${NC}\n"
    exit 1
fi

exit 0