build.sh: try to support # tags for single Scala version releases again

Author: Sciss

build.sh

@@ -14,7 +14,7 @@ set -e
 # - check out the tag for the version that needs to be published
 # - change `.travis.yml` to adjust the version numbers and trim down the build matrix as necessary
 # - commit the changes and tag this new revision with an arbitrary suffix after a hash, e.g.,
-#   `v1.2.3#dotty-0.27` (the suffix is ignored, the version will be `1.2.3`)
+#   `v1.2.3#3.0.0-M2` (the suffix is ignored, the version will be `1.2.3`)
 
 # We release on JDK 8 (for Scala 2.x and 3.x)
 isReleaseJob() {
@@ -25,20 +25,39 @@ isReleaseJob() {
   fi
 }
 
+# For tags that define a Scala version, we pick the jobs of one Scala version (2.13.x) to do the releases
+isTagScalaReleaseJob() {
+  if [[ "$ADOPTOPENJDK" == "8" && "$TRAVIS_SCALA_VERSION" =~ ^2\.13\.[0-9]+$ ]]; then
+    true
+  else
+    false
+  fi
+}
+
 if [[ "$SCALAJS_VERSION" == "" ]]; then
   projectPrefix="swing/"
 else
   projectPrefix="swingJS/"
 fi
 
 verPat="[0-9]+\.[0-9]+\.[0-9]+(-[A-Za-z0-9-]+)?"
-tagPat="^v$verPat(#.*)?$"
+tagPat="^v$verPat(#$verPat)?$"
 
 if [[ "$TRAVIS_TAG" =~ $tagPat ]]; then
   releaseTask="ci-release"
-  if ! isReleaseJob; then
-    echo "Not releasing on Java $ADOPTOPENJDK with Scala $TRAVIS_SCALA_VERSION"
-    exit 0
+  tagScalaVer=$(echo $TRAVIS_TAG | sed s/[^#]*// | sed s/^#//)
+  if [[ "$tagScalaVer" == "" ]]; then
+    if ! isReleaseJob; then
+      echo "Not releasing on Java $ADOPTOPENJDK with Scala $TRAVIS_SCALA_VERSION"
+      exit 0
+    fi
+  else
+    if isTagScalaReleaseJob; then
+      setTagScalaVersion='set every scalaVersion := "'$tagScalaVer'"'
+    else
+      echo "The releases for Scala $tagScalaVer are built by other jobs in the travis job matrix"
+      exit 0
+    fi
   fi
 fi
 
@@ -51,4 +70,4 @@ export CI_SNAPSHOT_RELEASE="${projectPrefix}publish"
 # for now, until we're confident in the new release scripts, just close the staging repo.
 export CI_SONATYPE_RELEASE="; sonatypePrepare; sonatypeBundleUpload; sonatypeClose"
 
-sbt clean ${projectPrefix}test ${projectPrefix}publishLocal $releaseTask
+sbt "$setTagScalaVersion" clean ${projectPrefix}test ${projectPrefix}publishLocal $releaseTask