drop support for Scala.js 0.6.x

.github/workflows/ci.yml

@@ -32,25 +32,16 @@ jobs:
             java: adopt@1.8
             scala: 0.27.0-RC1
             platform: js
-            pluginversion: 1.3.0
           - workers: 1
             os: ubuntu-latest
             java: adopt@1.8
             scala: 2.12.10
             platform: js
-            pluginversion: 1.3.0
           - workers: 1
             os: ubuntu-latest
             java: adopt@1.8
             scala: 2.13.3
             platform: js
-            pluginversion: 1.3.0
-          - workers: 1
-            os: ubuntu-latest
-            java: adopt@1.8
-            scala: 2.11.12
-            platform: js
-            pluginversion: 0.6.33
           - workers: 1
             os: ubuntu-latest
             java: adopt@1.8

CONTRIBUTING.markdown

@@ -23,12 +23,6 @@ use the `jvm` project:
 
     > jvm/console
 
-By default, the Scala.js version is usually the latest 1.0 release.
-If you want to override the version, you can use the `SCALAJS_VERSION`
-environment variable.
-
-    $ env SCALAJS_VERSION=0.6.33 sbt
-
 The releases are done with the `release.sh` script.  If you change the
 script, you can test it still works, but not publish artifacts, by
 running a non-publishing command like `package`:

build.sbt

@@ -32,14 +32,9 @@ ThisBuild / githubWorkflowBuildMatrixInclusions ++=
   crossScalaVersions.value.filterNot(Set(Scala211, DottyNew)) map { scala =>
     MatrixInclude(
       Map("os" -> PrimaryOS, "java" -> Java8, "scala" -> scala),
-      Map("platform" -> "js", "pluginversion" -> "1.3.0", "workers" -> "1"))
+      Map("platform" -> "js", "workers" -> "1"))
   }
 
-ThisBuild / githubWorkflowBuildMatrixInclusions +=
-  MatrixInclude(
-    Map("os" -> PrimaryOS, "java" -> Java8, "scala" -> Scala211),
-    Map("platform" -> "js", "pluginversion" -> "0.6.33", "workers" -> "1"))
-
 ThisBuild / githubWorkflowBuildMatrixInclusions ++=
   Seq("0.3.9", "0.4.0-M2") map { v =>
     MatrixInclude(
@@ -107,9 +102,6 @@ lazy val scalaVersionSettings = Seq(
   }
 )
 
-lazy val scalaJSVersion =
-  env("SCALAJS_VERSION").getOrElse("1.3.0")
-
 lazy val sharedSettings = MimaSettings.settings ++ scalaVersionSettings ++ Seq(
 
   name := "scalacheck",

project/plugin.sbt

@@ -4,6 +4,8 @@ addSbtPlugin("com.jsuereth" % "sbt-pgp" % "2.0.1")
 
 addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.5")
 
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.3.0")
+
 def env(name: String): Option[String] =
   Option(System.getenv(name))
 
@@ -12,15 +14,6 @@ def printAndDie(msg: String): Nothing = {
   sys.error(msg)
 }
 
-// Update SCALAJS_VERSION in release.sh, as well
-val scalaJSVersion = env("SCALAJS_VERSION") match {
-  case Some("0.6.33") => "0.6.33"
-  case Some("1.3.0") | Some("") | None => "1.3.0"
-  case Some(v) => printAndDie(s"unsupported scala.js version: $v")
-}
-
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % scalaJSVersion)
-
 // Update SCALANATIVE_VERSION in release.sh, as well
 val scalaNativeVersion = env("SCALANATIVE_VERSION") match {
   case Some("0.3.9") | Some("") | None => "0.3.9"

release.sh

@@ -52,10 +52,8 @@ runsbt "+ clean"
 # step 4a: jvm release
 runsbt "+ jvm/$CMD"
 
-# step 4b: js releases (clean versions)
-SCALAJS_VERSION="0.6.33" runsbt "+ js/$CMD"
-runsbt "+ js/clean"
-SCALAJS_VERSION="1.3.0" runsbt "+ js/$CMD"
+# step 4b: js releases
+runsbt "+ js/$CMD"
 
 # step 4c: native releases (clean versions)
 SCALANATIVE_VERSION="0.3.9" runsbt "+ native/$CMD"

tools/travis-script.sh

@@ -1,11 +1,7 @@
 #!/bin/bash
 set -evu
 
-if [[ "$PLATFORM" == "js" ]]; then
-  export SCALAJS_VERSION="$PLUGIN_VERSION"
-else
-  export SCALANATIVE_VERSION="$PLUGIN_VERSION"
-fi
+export SCALANATIVE_VERSION="$PLUGIN_VERSION"
 
 sbt_cmd=(sbt ++$TRAVIS_SCALA_VERSION)