Bump a git tag using by specifying major, minor, patch. This will also output the commits since the last tag.

tag-release.sc

#!/usr/bin/env amm
import ammonite.ops._, ImplicitWd._

case class Version(major: Int, minor: Int, patch: Int, label: String) {
  def tag = s"v$major.$minor.$patch$label"
}

def parseVersion(s: String) = {
  val VersionPattern = "^v(\\d+).(\\d+).(\\d+)(-.+)?$".r
  val VersionPattern(major, minor, patch, labelNullable) = s
  val label = Option(labelNullable).getOrElse("")
  Version(major.toInt, minor.toInt, patch.toInt, label)
}

@main
def main(bumpType: String) = {
  %('git, "pull", "--tags")
  val currTag = %%('git, "describe", "--abbrev=0", "--tags").out.trim

  val currVersion = parseVersion(currTag)
  val newVersion = bumpType.toLowerCase.trim match {
    case "major" => currVersion.copy(major = currVersion.major + 1)
    case "minor" => currVersion.copy(minor = currVersion.minor + 1)
    case "patch" => currVersion.copy(patch = currVersion.patch + 1)
  }
  val newTag = newVersion.tag
  %('git, "commit", "--allow-empty", "-m", s"$newTag (jenkins trigger)")
  %('git, "tag", "-a", newTag, "-m", newTag)

  println("commits since last tag:")
  val commitSummary = %%('git, "log", "--pretty=oneline", "--pretty=format:%s", s"$newTag...$currTag").out.trim
  println(commitSummary.split("\n").mkString("* ", "\n* ", ""))
}