Build on tag

.github/workflows/ci.yml

@@ -1,6 +1,8 @@
 name: CI
 on:
   push:
+    tags:
+      - '*'
     branches:
       - main
   pull_request:

build.sbt

@@ -4,7 +4,16 @@ lazy val V = new {
 }
 
 ThisBuild / organization := "com.twitter.multiversion"
-ThisBuild / version := "0.1.0-SNAPSHOT"
+ThisBuild / version := {
+  val snapshotV = "0.1.0-SNAPSHOT"
+  val old = (ThisBuild / version).value
+  (sys.env.get("BUILD_VERSION") orElse sys.props.get("sbt.build.version")) match {
+    case Some(v) => v
+    case _ =>
+      if ((ThisBuild / isSnapshot).value) snapshotV
+      else old
+  }
+}
 ThisBuild / homepage := Some(url("https://github.com/twitter/bazel-multiversion"))
 ThisBuild / licenses := List(
   "Apache-2.0" -> url("http://www.apache.org/licenses/LICENSE-2.0")

project/plugins.sbt

@@ -7,3 +7,4 @@ addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.5.3")
 addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.9.19")
 addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.6.1")
 addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.15.0")
+addSbtPlugin("com.dwijnand" % "sbt-dynver" % "4.0.0")