prime the build's compiler bridge

bin/run-ci-scripted-to-jar.sh

@@ -6,4 +6,5 @@ PROJECT_ROOT="zincRoot"
 sbt -Dfile.encoding=UTF-8 \
   -J-XX:ReservedCodeCacheSize=512M \
   -J-Xms1024M -J-Xmx4096M -J-server \
+  "+compilerHelloworld/compile" \
   "zincScripted/test:run --to-jar"

bin/run-ci-scripted.sh

@@ -3,7 +3,9 @@ set -eu
 set -o nounset
 
 PROJECT_ROOT="zincRoot"
+
 sbt -Dfile.encoding=UTF-8 \
   -J-XX:ReservedCodeCacheSize=512M \
   -J-Xms1024M -J-Xmx4096M -J-server \
+  "+compilerHelloworld/compile" \
   "zincScripted/test:run"

bin/run-ci.sh

@@ -6,6 +6,7 @@ PROJECT_ROOT="zincRoot"
 sbt -Dfile.encoding=UTF-8 \
   -J-XX:ReservedCodeCacheSize=512M \
   -J-Xms1024M -J-Xmx4096M -J-server \
+  "+compilerHelloworld/compile" \
   "$PROJECT_ROOT/mimaReportBinaryIssues" \
   scalafmtCheckAll \
   whitesourceCheckPolicies \

build.sbt

@@ -397,6 +397,14 @@ lazy val zincCompileCore = (project in internalPath / "zinc-compile-core")
   )
   .configure(addSbtUtilLogging, addSbtIO, addSbtUtilControl)
 
+lazy val compilerHelloworld = (project in internalPath / "helloworld")
+  .settings(
+    name := "Compiler Hello world",
+    scalaVersion := scala212,
+    crossScalaVersions := Seq(scala212, scala210, scala211, scala213),
+    publish / skip := true
+  )
+
 // defines Java structures used across Scala versions, such as the API structures and relationships extracted by
 //   the analysis compiler phases and passed back to sbt.  The API structures are defined in a simple
 //   format from which Java sources are generated by the sbt-contraband plugin.

internal/helloworld/Hello.scala

@@ -0,0 +1,2 @@
+package example
+object Hello extends App {}

project/build.properties

@@ -1 +1 @@
-sbt.version=1.2.8
+sbt.version=1.3.0-M3