[WIP] release for Scala 2.12.1

admin/build.sh

@@ -1,20 +1,39 @@
 #!/bin/bash
 
-# prep environment for publish to sonatype staging if the HEAD commit is tagged
+set -e
 
-# git on travis does not fetch tags, but we have TRAVIS_TAG
-# headTag=$(git describe --exact-match ||:)
+# Builds of tagged revisions are published to sonatype staging.
 
-if [[ "$TRAVIS_TAG" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-[A-Za-z0-9-]+)? ]]; then
+# Travis runs a build on new revisions and on new tags, so a tagged revision is built twice.
+# Builds for a tag have TRAVIS_TAG defined, which we use for identifying tagged builds.
+# Checking the local git clone would not work because git on travis does not fetch tags.
+
+# The version number to be published is extracted from the tag, e.g., v1.2.3 publishes
+# version 1.2.3 using all Scala versions in build.sbt's `crossScalaVersions`.
+
+# When a new, binary incompatible Scala version becomes available, a previously released version
+# can be released using that new Scala version by creating a new tag containing the Scala version
+# after a hash, e.g., v1.2.3#2.13.0-M1.
+
+verPat="[0-9]+\.[0-9]+\.[0-9]+(-[A-Za-z0-9-]+)?"
+tagPat="^v$verPat(#$verPat)?$"
+
+if [[ "$TRAVIS_TAG" =~ $tagPat ]]; then
   echo "Going to release from tag $TRAVIS_TAG!"
-  myVer=$(echo $TRAVIS_TAG | sed -e s/^v//)
-  publishVersion='set every version := "'$myVer'"'
+
+  tagVer=$(echo $TRAVIS_TAG | sed s/#.*// | sed s/^v//)
+  publishVersion='set every version := "'$tagVer'"'
+
+  scalaVer=$(echo $TRAVIS_TAG | sed s/[^#]*// | sed s/^#//)
+  if [ "$scalaVer" != "" ]; then
+    publishScalaVersion='set every crossScalaVersions := Seq("'$scalaVer'")'
+  fi
+  
   extraTarget="+publish-signed"
 
   cat admin/gpg.sbt >> project/plugins.sbt
   admin/decrypt.sh sensitive.sbt
   (cd admin/ && ./decrypt.sh secring.asc)
 fi
 
-# the concurrentRestrictions should prevent spurious test failures, see https://github.com/spray/spray/pull/233
-sbt "$publishVersion" clean update +compile +test +publishLocal $extraTarget
+sbt "$publishVersion" "$publishScalaVersion" clean update +test +publishLocal $extraTarget

build.sbt

@@ -14,7 +14,7 @@ lazy val commonSettings = scalaModuleSettings ++ Seq(
     if (java.startsWith("1.6.") || java.startsWith("1.7."))
       Seq("2.11.8")
     else if (java.startsWith("1.8.") || java.startsWith("1.9."))
-      Seq("2.12.0")
+      Seq("2.12.0", "2.12.1")
     else
       sys.error(s"don't know what Scala versions to build on $java")
   },
@@ -63,8 +63,8 @@ lazy val library = project settings (scalaModuleOsgiSettings: _*) settings (Mima
     s"-Jdummy=${pluginJar.value.lastModified}"),
   libraryDependencies ++= Seq(
     "org.scala-lang" % "scala-compiler"  % scalaVersion.value % "test",
-    "junit"          % "junit"           % "4.11" % "test",
-    "com.novocode"   % "junit-interface" % "0.10" % "test"),
+    "junit"          % "junit"           % "4.12" % "test",
+    "com.novocode"   % "junit-interface" % "0.11" % "test"),
   testOptions          += Tests.Argument(
     TestFrameworks.JUnit,
     s"-Dscala-continuations-plugin.jar=${pluginJar.value.getAbsolutePath}"