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chore: mark scala-library and scalajs-scalalib_2.13 as always instead of semver-spec #23753

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Aug 15, 2025
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chore: mark scala-library and scalajs-scalalib_2.13 as always instead of semver-spec #23753

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21 changes: 18 additions & 3 deletions project/Build.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -1661,7 +1661,12 @@ object Build {
name := "scala-library-nonbootstrapped",
moduleName := "scala-library",
version := dottyNonBootstrappedVersion,
versionScheme := Some("semver-spec"),
// We mark the current library as "always" instead of "semver-spec" so that buildtools can
// assume binary compatibility between 2.13.x and 3.x.y. If not set, build tools will, at least sbt,
// will error by claiming that scala-library:2.13.x and 3.x.y are potentially binary incompatible.
// Situation where we have 2.13.x and 3.x.y in the same dependency tree happens
// because we allow cross-compilation.
versionScheme := Some("always"),
scalaVersion := referenceVersion, // nonbootstrapped artifacts are compiled with the reference compiler (already officially published)
crossPaths := false, // org.scala-lang:scala-library doesn't have a crosspath
autoScalaLibrary := false, // do not add a dependency to stdlib
Expand Down Expand Up @@ -1736,7 +1741,12 @@ object Build {
name := "scala-library-bootstrapped",
moduleName := "scala-library",
version := dottyVersion,
versionScheme := Some("semver-spec"),
// We mark the current library as "always" instead of "semver-spec" so that buildtools can
// assume binary compatibility between 2.13.x and 3.x.y. If not set, build tools will, at least sbt,
// will error by claiming that scala-library:2.13.x and 3.x.y are potentially binary incompatible.
// Situation where we have 2.13.x and 3.x.y in the same dependency tree happens
// because we allow cross-compilation.
versionScheme := Some("always"),
// sbt defaults to scala 2.12.x and metals will report issues as it doesn't consider the project a scala 3 project
// (not the actual version we use to compile the project)
scalaVersion := referenceVersion,
Expand Down Expand Up @@ -1851,7 +1861,12 @@ object Build {
// Yes, I know, this is weird and feels wrong.
moduleName := "scalajs-scalalib_2.13",
version := dottyVersion,
versionScheme := Some("semver-spec"),
// We mark the current library as "always" instead of "semver-spec" so that buildtools can
// assume binary compatibility between 2.13.x and 3.x.y. If not set, build tools will, at least sbt,
// will error by claiming that scalajs-scalalib_2.13:2.13.x and 3.x.y are potentially binary incompatible.
// Situation where we have 2.13.x and 3.x.y in the same dependency tree happens
// because we allow cross-compilation.
versionScheme := Some("always"),
crossPaths := false,
// sbt defaults to scala 2.12.x and metals will report issues as it doesn't consider the project a scala 3 project
// (not the actual version we use to compile the project)
Expand Down