Merge pull request #170 from mdedetrich/calculate-snapshot-version-pr…

…operly

Calculate snapshot version properly

build.sbt

@@ -43,10 +43,21 @@ ThisBuild / githubWorkflowPublish := Seq(
     )
   )
 )
-ThisBuild / version := {
-  val orig = (ThisBuild / version).value
-  if (orig.endsWith("-SNAPSHOT")) orig.split("""\+""").head + "-SNAPSHOT"
-  else orig
+
+// So that publishLocal doesn't continuously create new versions
+def versionFmt(out: sbtdynver.GitDescribeOutput): String = {
+  val snapshotSuffix = if
+    (out.isSnapshot()) "-SNAPSHOT"
+  else ""
+    out.ref.dropPrefix + snapshotSuffix
+}
+
+def fallbackVersion(d: java.util.Date): String = s"HEAD-${sbtdynver.DynVer timestamp d}"
+
+ThisBuild / version := dynverGitDescribeOutput.value.mkVersion(versionFmt, fallbackVersion(dynverCurrentDate.value))
+ThisBuild / dynver := {
+  val d = new java.util.Date
+  sbtdynver.DynVer.getGitDescribeOutput(d).mkVersion(versionFmt, fallbackVersion(d))
 }
 
 sbtPlugin := true