Added release script

Author: dmongeau

release.sh

@@ -0,0 +1,39 @@
+#!/bin/zsh
+
+LAST_VERSION=$(git tag -l | sort -t. -k 1,1n -k 2,2n -k 3,3n -k 4,4n | tail -n 1)
+NEXT_VERSION=$(echo $LAST_VERSION | awk -F. -v OFS=. 'NF==1{print ++$NF}; NF>1{if(length($NF+1)>length($NF))$(NF-1)++; $NF=sprintf("%0*d", length($NF), ($NF+1)%(10^length($NF))); print}')
+VERSION=${1-${NEXT_VERSION}}
+DEFAULT_MESSAGE="Release"
+MESSAGE=${2-${DEFAULT_MESSAGE}}
+RELEASE_BRANCH="release/$VERSION"
+
+git add .
+git commit -am $MESSAGE
+git push
+
+# Create release branch
+git checkout -b $RELEASE_BRANCH develop
+gulp build
+git add .
+git commit -am "Build $NEXT_VERSION"
+git push origin $RELEASE_BRANCH
+
+# Merge release branch in master
+git checkout master
+git merge $RELEASE_BRANCH
+
+# Merge release branch in develop
+git checkout develop
+git merge $RELEASE_BRANCH
+git push origin develop
+
+# Tag and push master
+git checkout master
+git tag $VERSION
+git push origin master --tags
+
+# Remove release branch
+git branch -d $RELEASE_BRANCH
+
+# Return to develop
+git checkout develop