YML script for cut-off NPM based project to release branch

cut-off-npm-project-script.yml

# YML script for cuffing of npm project to release branch
# There are 2 wersions, x.y.z-SNAPSHOT for development and x.y.z for releasing. 
# Release branch will be created without snapshot postfix


  before_script:
    # fetch version to release from package.json snapshot version
    - export RELEASE_VERSION=$(node -p "require('./package.json').version.replace('-SNAPSHOT','')")
    # bump next version in pattern X.X+1.0 from RELEASE_VERSION
    - export NEXT_VERSION=$(perl -pe 's/^(\d+)\.(\d+)\.(\d+)$/"$1.".($2+1).".0"/e' <<< $RELEASE_VERSION)
    # calculate release branch name by cutting patch level
    - export RELEASE_BRANCH_NAME=`echo ${RELEASE_VERSION} | sed 's/\([0-9]*\.[0-9]*\)\.[0-9]*/\1/gi'`    
  script:
    # Optionally check if sentry package is outdated
    - '[ -z "$(npm outdated @sentry/angular | tee /dev/stderr)" ] || exit 7'
    - git checkout -b release-${RELEASE_BRANCH_NAME}
    - git push origin release-${RELEASE_BRANCH_NAME}
    - git checkout develop
    # set NEXT_VERSION (snapshot) in package.json and lock file without creating tag
    - npm version ${NEXT_VERSION}-SNAPSHOT -git-tag-version=false
    # commit and push
    - git commit -a -m "New snapshot version ${NEXT_VERSION}"
    - git push --push-option=ci.skip origin HEAD:${CI_COMMIT_REF_NAME}