Configure publishing

build.sbt

@@ -1,5 +1,6 @@
 lazy val sbtKotlinPlugin = project.in(file("."))
   .enablePlugins(SbtPlugin)
+  .settings(Publishing.settings)
   .settings(
     name         := "sbt-kotlin-plugin",
     organization := "org.jetbrains.scala",
@@ -9,5 +10,5 @@ lazy val sbtKotlinPlugin = project.in(file("."))
     scalacOptions ++= Seq("-deprecation", "-feature", "-Werror", "-Xlint", "-release", "8"),
     javacOptions  ++= Seq("--release", "8"),
 
-    scriptedLaunchOpts += "-Dplugin.version=" + version.value
+    scriptedLaunchOpts += "-Dplugin.version=" + version.value,
   )

project/Publishing.scala

@@ -0,0 +1,28 @@
+import sbt.Keys.*
+import sbt.{Credentials, Def, Path, fileToRichFile, toRepositoryName}
+
+object Publishing {
+  private val loadCredentialsFromSystemPropsOrFile = credentials += {
+    val fromSystemProps = for {
+      user <- sys.props.get("scala_plugin_deps_user")
+      pwd  <- sys.props.get("scala_plugin_deps_password")
+    } yield Credentials(realm = null, host = "packages.jetbrains.team", userName = user, passwd = pwd)
+
+    fromSystemProps
+      .getOrElse(Credentials(Path.userHome / ".sbt" / ".scala_plugin_deps_credentials"))
+  }
+
+  private val publishIfNotSnapshot = publish := {
+    if (isSnapshot.value)
+      sys.error("Do not publish snapshot versions. Set a tag 'vX.Y.Z' to proceed. Example: v3.20.2")
+    else
+      publish.value
+  }
+
+  val settings: Seq[Def.Setting[?]] = Seq(
+    publishTo     := Some("Scala Plugin Dependencies" at "https://packages.jetbrains.team/maven/p/scl/scala-plugin-deps"),
+    versionScheme := Some("semver-spec"),
+    loadCredentialsFromSystemPropsOrFile,
+    publishIfNotSnapshot,
+  )
+}