Checks whether a commit message say RELEASE and has a semver version number

release-version.groovy

def fullReleaseCommit = "STORY-987 RELEASE 1.3.0 There's this new release"
def regularCommit = "STORY-999 No release here"
def releaseCommitWithoutVersionNumber = "STORY-987 RELEASE Sorry! Forgot the version number"

class CommitMessage {
  final releaseTextTrigger = "RELEASE"
  final versionPattern = /.*(\d+).(\d+).(\d+).*/

  final String message

  CommitMessage(message) {
    this.message = message
  }

  String toString() {
    message
  }

  boolean isReleaseCommit() {
    final isThereVersionNumber = message =~ versionPattern

    message.contains(releaseTextTrigger) && isThereVersionNumber
  }

  def releaseVersion() {
    final versionNumber = message =~ versionPattern

    [major: versionNumber[0][1], minor: versionNumber[0][2], patch: versionNumber[0][2]]
  }
}

assert new CommitMessage(regularCommit).isReleaseCommit() == false
assert new CommitMessage(releaseCommitWithoutVersionNumber).isReleaseCommit() == false
assert new CommitMessage(fullReleaseCommit).isReleaseCommit() == true

println new CommitMessage(fullReleaseCommit).releaseVersion()