Git hook that increments Wordpress plugin and theme version automatically based on number of commits!

pre-commit.sh

#!/bin/bash
#
## DESCRIPTION
#  Git hook that increments Wordpress plugin and theme version 
#  automatically based on number of commits!
#
## INSTALLATION
#  In order to install put this file in git root and run this command:
#
#  ln -s -f ../../pre-commit.sh .git/hooks/pre-commit
#
#  The -f flag will replace existing hook file if any!
#
## SETUP
#  Requires TAGS in repository.
#  Modifies files with @git-repository set to current repository remote file base name. 
#  This enables subrepositories to not be affected.
#
#  Example Plugin header:
#	/*
#    * Plugin Name: My Plugin
#    * Version: 1.0.0
#    * @git-repository github-repository-name.git
#	 */
#
## WHAT IT DOES
#  After Each commit the major version is taken form tag (like 1.0) and
#  the minor version will increase based on commit count 
#  so 1.0.0 -> 1.0.1 -> 1.0.2 -> ... etc
git stash -q --keep-index

echo "Increasing Wordpress plugin and theme version number...";

REMOTE="$(basename $(git ls-remote --get-url))"

PATTERN="@git-repository\(.*\)$REMOTE"

TAG=$(git describe | cut -d "-" -f 1-2 | tr "-" ".")

TAG="${TAG%.*}.$((${TAG##*.}+1))"

FILES="$(grep --include=\*.{php,css} -r -w -n -l . -e "$PATTERN")"

count=0

for line in $FILES 
do
	count=$((count+1))
    sed -i '' -e "s/Version:\(.*\)/Version: $TAG/g" $line 
    echo "Found file: " $line
done

if [ $count -eq 1 ] 
then
	files="$(echo file)"
else
	files="$(echo files)"
fi

echo "Adding changed files to current commit...";

# Stage updated files
git add -u
# Re-apply original unstaged changes
git stash pop -q

echo "...Done! Affected $count $files! New version is $TAG";