git-hotfix

#!/bin/sh
set -e
masterBranch="master"

((!$#)) && echo No hotfix name, command ignored! && echo "  - git hotfix <version> <tag>" && exit 1

if [[ "$1" = "--h" ]] ; then
   echo "Creates a hotfix branch at the latest available tag and checks it out.";
   echo "  - git hotfix <version> <tag>";
   echo "Tag is optional. If not supplied, it will take the latest tag automatically"
   exit 1;
fi

if ! [ -d .git ] ; then
	if ! [ $(git rev-parse --is-inside-work-tree &>/dev/null; echo "${?}") == '0' ] ; then
		echo "Current directory is not a git folder."
		exit 1;
	fi
fi


numericRegex="^[.0-9]+$"
if ! [[ "$1" =~ $numericRegex ]] ; then
   echo error: Not a numeric version
   exit 1
fi

echo Starting hotfix $1

head=$masterBranch
if [ "$2" = "" ]; then
	head=$(git describe --tags `git rev-list --tags --max-count=1`)
	echo branching from latest tag: $head
else
	head=$2
	echo branching from requested cs: $head
fi

git checkout -b hotfix/$1 $head