Fix CI version capture

Author: jupblb

.github/workflows/ci.yml

@@ -140,8 +140,11 @@ jobs:
       - uses: DeterminateSystems/magic-nix-cache-action@v13
 
       - run: |
-          nix develop .#jdk${{ matrix.java }} --command sbt cli/pack publishM2 publishLocal
-          SCIP_JAVA_VERSION="$(nix develop .#jdk${{ matrix.java }} --command sbt --error 'print cli/version')"
+          sbt_output="$(mktemp)"
+          nix develop .#jdk${{ matrix.java }} --command \
+            sbt --error cli/pack publishM2 publishLocal 'print cli/version' | tee "$sbt_output"
+          SCIP_JAVA_VERSION="$(awk 'NF { value = $0 } END { print value }' "$sbt_output")"
+          test -n "$SCIP_JAVA_VERSION"
           printf 'SCIP_JAVA_VERSION=%s\n' "$SCIP_JAVA_VERSION" >> "$GITHUB_ENV"
           printf 'SCIP_JAVA_CLI=%s\n' "$PWD/scip-java/target/pack/bin/scip-java" >> "$GITHUB_ENV"
 

build.sbt

@@ -27,7 +27,7 @@ inThisBuild(
     PB.protocVersion := V.protobuf,
     autoScalaLibrary := false,
     crossPaths := false,
-    // Pin bytecode to major 55 so sbt-assembly's older ASM can shade it.
+    // Pin bytecode to major 55 so compiler plugins can run on Java 11.
     Compile / javacOptions ++= Seq("--release", "11"),
     incOptions ~= { old =>
       old.withEnabled(false).withApiDebug(true)
@@ -427,6 +427,8 @@ lazy val minimized = project
     // Fork javac so it receives real file paths instead of sbt's `vf://` virtual-file URIs
     // (see the comment on `scipKotlincMinimized` for the long story).
     javaHome := Some(file(System.getProperty("java.home"))),
+    // Keep minimized snapshots stable across JDK 11/17/21.
+    Compile / javacOptions ++= Seq("--release", "11"),
     Compile / javacOptions ++= javacModuleOptions,
     javacOptions +=
       List(