Only Ycheck scala2-library-bootstrapped once (#18732)

We only Ycheck the compilation of scala2-library-bootstrapped once. This test the -Yscala2-stdlib flag. We do this on the MiMa test to avoid the large overhead of Ycheck when compiling scala3-bootstrapped.
scala · Oct 24, 2023 · 6aa24fa · 6aa24fa
2 parents 44a537b + ff6c339
commit 6aa24fa
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diff --git a/project/Build.scala b/project/Build.scala
@@ -1009,7 +1009,6 @@ object Build {
       },
       Compile / doc / scalacOptions += "-Ydocument-synthetic-types",
       scalacOptions += "-Ycompile-scala2-library",
-      scalacOptions += "-Ycheck:all",
       scalacOptions -= "-Xfatal-warnings",
       ivyConfigurations += SourceDeps.hide,
       transitiveClassifiers := Seq("sources"),

diff --git a/project/scripts/scala2-library-tasty-mima.sh b/project/scripts/scala2-library-tasty-mima.sh
@@ -17,6 +17,7 @@ setTastyVersion $MINOR_TASTY_VERSION_SUPPORTED_BY_TASTY_MIMA 0
 # Run scala2-library-bootstrapped/tastyMiMaReportIssues using a custom TASTy version.
 # We clean before to make sure all sources are recompiled using the new TASTY version.
 # We clean after to make sure no other test will use the TASTy generated with this version.
-"$SBT" "clean; scala2-library-bootstrapped/clean; reload; scala2-library-bootstrapped/tastyMiMaReportIssues; clean; scala2-library-bootstrapped/clean"
+# We set -Ycheck:all to check that -Ycompile-scala2-library does not gererate inconsistent trees.
+"$SBT" 'clean; scala2-library-bootstrapped/clean; reload; set `scala2-library-bootstrapped`/scalacOptions += "-Ycheck:all"; scala2-library-bootstrapped/tastyMiMaReportIssues; clean; scala2-library-bootstrapped/clean'
 
 setTastyVersion $MINOR_TASTY_VERSION $EXPERIMENTAL_TASTY_VERSION