YML script for create tag for NPM based project

tag-npm-project-script.yml

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


  before_script:
    # fetch version to release from package.json snapshot version
    - export RELEASE_VERSION=$(node -p "require('./package.json').version.replace('-SNAPSHOT','')")
    # bump next patch version in pattern X.X.X+1 from RELEASE_VERSION
    - export NEXT_PATCH_VERSION=$(perl -pe 's/^(\d+)\.(\d+)\.(\d+)$/"$1.$2.".($3+1)/e' <<< $RELEASE_VERSION)
  script:
    # set RELEASE_VERSION in package.json
    - npm version ${RELEASE_VERSION} -git-tag-version=false
    # commit and tag
    - git commit -a -m "Release ${RELEASE_VERSION}"
    - git push --push-option=ci.skip origin HEAD:${CI_COMMIT_REF_NAME}
    - git tag ${RELEASE_VERSION}
    - git push origin ${RELEASE_VERSION}
    # set NEXT_PATCH_VERSION (snapshot) in package.json
    - npm version ${NEXT_PATCH_VERSION}-SNAPSHOT -git-tag-version=false
    # commit, push and sync to develop
    - git commit -a -m "New snapshot version ${NEXT_PATCH_VERSION}"
    - git push --push-option=ci.skip origin HEAD:${CI_COMMIT_REF_NAME}