drop support for Scala 2.11

project/Dependencies.scala

@@ -2,7 +2,7 @@ import sbt._
 
 object Dependencies {
   val x = List(1) // scalafix:ok
-  def scalafixVersion: String = "0.10.4"
+  def scalafixVersion: String = "0.10.4+78-f6b8c84d-SNAPSHOT"
 
   val all = List(
     "org.eclipse.jgit" % "org.eclipse.jgit" % "5.13.1.202206130422-r",

src/main/scala/scalafix/internal/sbt/ScalafixInterface.scala

@@ -129,6 +129,11 @@ object ScalafixInterface {
             "Rules such as ExplicitResultTypes requiring the project version to match the Scalafix " +
             "version are unsupported for the moment."
         )
+      else if (scalafixBinaryScalaVersion == "2.11")
+        logger.error(
+          "Scala 2.11 is no longer supported. Please downgrade to the final version supporting " +
+            "it: sbt-scalafix 0.10.4."
+        )
       val callback = new ScalafixLogger(logger)
       val scalafixArguments = ScalafixAPI
         .fetchAndClassloadInstance(

src/main/scala/scalafix/sbt/BuildInfo.scala

@@ -14,10 +14,10 @@ object BuildInfo {
     property("scala213")
   def scala212: String =
     property("scala212")
-  def scala211: String =
-    property("scala211")
+  @deprecated("Scala 2.11 is no longer supported", ">0.10.4")
+  def scala211: String = ???
   def supportedScalaVersions: List[String] =
-    List(scala213, scala212, scala211)
+    List(scala213, scala212)
 
   private val propertiesPath = "scalafix-interfaces.properties"
 

src/main/scala/scalafix/sbt/ScalafixTestkitPlugin.scala

@@ -33,7 +33,7 @@ object ScalafixTestkitPlugin extends AutoPlugin {
       // This makes it simpler to use sbt-scalafix SNAPSHOTS: such snapshots may bring scalafix-* SNAPSHOTS which is fine in the
       // meta build as the same resolver (declared in project/plugins.sbt) is used. However, since testkit-enabled projects are
       // built against a version of scalafix-testkit dictated by scalafix.sbt.BuildInfo.scalafixVersion, the same resolver is
-      // needed here as well.
+      // needed here as well. Unfortunately it works only for sbt 1.7+, see https://github.com/sbt/sbt/pull/6849.
       includePluginResolvers := true
     )
 

src/sbt-test/sbt-1.5/scalafixEnable/build.sbt

@@ -9,7 +9,13 @@ lazy val scala210 = project
 lazy val scala211 = project
   .in(file("scala211"))
   .settings(
-    scalaVersion := "2.11.12" // supported by semanticdb-scalac
+    scalaVersion := "2.11.12" // supported by semanticdb-scalac, but not by sbt-scalafix
+  )
+
+lazy val scala212 = project
+  .in(file("scala212"))
+  .settings(
+    scalaVersion := "2.12.17" // supported by semanticdb-scalac
   )
 
 lazy val scala3 = project

src/sbt-test/sbt-1.5/scalafixEnable/test

@@ -1,13 +1,14 @@
 # enable semanticdb output where supported
 > scalafixEnable
 
-# check that projects not supported by semanticdb-scalac can still compile
+# check that projects not supported by sbt-scalafix can still compile
 > scala210/compile
+> scala211/compile
 
-# check that we can run a semantic rule against a Scala 2.11 dialect source file
--> scala211/scalafix --check SemanticRule
-> scala211/scalafix SemanticRule
-> scala211/scalafix --check SemanticRule
+# check that we can run a semantic rule against a Scala 2.12 dialect source file
+-> scala212/scalafix --check SemanticRule
+> scala212/scalafix SemanticRule
+> scala212/scalafix --check SemanticRule
 
 # check that we can run a semantic rule against a Scala 3 dialect source file
 -> scala3/scalafix --check SemanticRule

src/sbt-test/sbt-1.5/testkit/build.sbt

@@ -1,12 +1,14 @@
 lazy val V = _root_.scalafix.sbt.BuildInfo
 
-lazy val rulesCrossVersions = Seq(V.scala213, V.scala212, V.scala211)
+lazy val rulesCrossVersions = Seq(V.scala213, V.scala212)
 lazy val scala3Version = "3.0.0"
 
 inThisBuild(
   List(
     semanticdbEnabled := true,
-    semanticdbVersion := scalafixSemanticdb.revision
+    semanticdbVersion := scalafixSemanticdb.revision,
+    // need for sbt <1.7.0 as includePluginResolvers has no effect, see https://github.com/sbt/sbt/pull/6853
+    resolvers += Resolver.sonatypeRepo("public")
   )
 )
 
@@ -26,7 +28,7 @@ lazy val input = projectMatrix
       scalacOptions += "-Xsource:3"
     )
   )
-  .jvmPlatform(scalaVersions = Seq(V.scala212, V.scala211))
+  .jvmPlatform(scalaVersions = Seq(V.scala212))
 
 lazy val output = projectMatrix
   .defaultAxes(VirtualAxis.jvm)
@@ -71,10 +73,5 @@ lazy val tests = projectMatrix
     axisValues = Seq(TargetAxis(V.scala212), VirtualAxis.jvm),
     settings = Seq()
   )
-  .customRow(
-    scalaVersions = Seq(V.scala211),
-    axisValues = Seq(TargetAxis(V.scala211), VirtualAxis.jvm),
-    settings = Seq()
-  )
   .dependsOn(rules)
   .enablePlugins(ScalafixTestkitPlugin)

src/sbt-test/sbt-scalafix/cross-build/build.sbt

@@ -16,19 +16,10 @@ lazy val root = project
   .in(file("."))
   .aggregate(
     javaProject,
-    scala211,
-    scala210,
     scala212,
     scala213
   )
 
-lazy val scala210 = project.settings(
-  scalaVersion := "2.10.7"
-)
-lazy val scala211 = project.settings(
-  scalaVersion := Versions.scala211,
-  scalafixSettings
-)
 lazy val scala212 = project
   .configs(IntegrationTest)
   .settings(

src/sbt-test/sbt-scalafix/cross-build/test

@@ -22,10 +22,7 @@
 > it:scalafix --test ProcedureSyntax
 
 > javaProject/compile:scalafix ProcedureSyntax
-# Should fail because 2.10 has no semanticdb
-# Other >2.10 projects should succeed
--> compile:scalafix
--> test:scalafix
+
 # it config exists only for 2.12
 > it:scalafix
 

src/sbt-test/sbt-scalafix/scalafixEnable/build.sbt

@@ -1,75 +1,77 @@
 val V = _root_.scalafix.sbt.BuildInfo
 
-// 2.10 is not supported
-lazy val scala210 = project.settings(
-  scalaVersion := "2.10.4",
-  libraryDependencies := Nil,
-  scalacOptions := Nil
+lazy val config = project
+
+lazy val unsupported = project.settings(
+  // 2.11.x is not supported
+  scalaVersion := "2.11.12"
 )
 
-// 2.11.x is supported
-lazy val scala211_old = project.settings(
-  // semanticdb-scalac_2.11.0 was never available
-  scalaVersion := "2.11.0"
+lazy val bumpScala = project.settings(
+  // semanticdb-scalac_2.12.0 was never available
+  scalaVersion := "2.12.0"
 )
 
-// 2.11.x is supported
-lazy val scala211 = project.settings(
-  // semanticdb-scalac_2.11.11 no longer available after 4.1.9
-  scalaVersion := "2.11.11"
+lazy val downgradeScalameta = project.settings(
+  // semanticdb-scalac_2.12.4 no longer available after 4.1.9
+  scalaVersion := "2.12.4"
 )
 
-// 2.12.x is supported
-lazy val scala212 = project.settings(
+lazy val upgradeScalameta = project.settings(
   // semanticdb-scalac_2.12.15 not yet available in 4.4.10, became available as of 4.4.28
   scalaVersion := "2.12.15"
 )
 
-// 2.13.x is supported
-lazy val scala213 = project.settings(
-  // semanticdb-scalac_2.13.4 available in 4.4.10, became available as of 4.4.0
+lazy val available = project.settings(
+  // semanticdb-scalac_2.13.4 available in 4.4.10
   scalaVersion := "2.13.4",
   crossScalaVersions := Seq("2.12.15")
 )
 
 TaskKey[Unit]("check") := {
-  assert((scala210 / semanticdbEnabled).value == false)
-  assert((scala210 / scalaVersion).value == "2.10.4")
-  assert((scala210 / Compile / compile / scalacOptions).value.isEmpty)
+  assert((unsupported / semanticdbEnabled).value == false)
+  assert((unsupported / scalaVersion).value == "2.11.12")
+  assert((unsupported / Compile / compile / scalacOptions).value.isEmpty)
 
-  assert((scala211_old / semanticdbEnabled).value == true)
-  assert((scala211_old / scalaVersion).value == "2.11.12")
-  assert((scala211_old / semanticdbCompilerPlugin).value.revision == "4.4.10")
+  assert((bumpScala / semanticdbEnabled).value == true)
+  assert((bumpScala / scalaVersion).value == V.scala212)
+  assert(
+    (bumpScala / semanticdbCompilerPlugin).value.revision == V.scalametaVersion
+  )
   assert(
-    (scala211_old / Compile / compile / scalacOptions).value
+    (bumpScala / Compile / compile / scalacOptions).value
       .count(_ == "-Yrangepos") == 1
   )
 
-  assert((scala211 / semanticdbEnabled).value == true)
-  assert((scala211 / scalaVersion).value == "2.11.11")
-  assert((scala211 / semanticdbCompilerPlugin).value.revision == "4.1.9")
+  assert((downgradeScalameta / semanticdbEnabled).value == true)
+  assert((downgradeScalameta / scalaVersion).value == "2.12.4")
   assert(
-    (scala211 / Compile / compile / scalacOptions).value
+    (downgradeScalameta / semanticdbCompilerPlugin).value.revision == "4.1.9"
+  )
+  assert(
+    (downgradeScalameta / Compile / compile / scalacOptions).value
       .count(_ == "-Yrangepos") == 1
   )
 
-  assert((scala212 / semanticdbEnabled).value == true)
-  assert((scala212 / scalaVersion).value == "2.12.15")
-  assert((scala212 / semanticdbCompilerPlugin).value.revision == "4.4.28")
+  assert((upgradeScalameta / semanticdbEnabled).value == true)
+  assert((upgradeScalameta / scalaVersion).value == "2.12.15")
+  assert(
+    (upgradeScalameta / semanticdbCompilerPlugin).value.revision == "4.4.28"
+  )
   assert(
-    (scala212 / Compile / compile / scalacOptions).value
+    (upgradeScalameta / Compile / compile / scalacOptions).value
       .count(_ == "-Yrangepos") == 1
   )
 
-  assert((scala213 / semanticdbEnabled).value == true)
-  assert((scala213 / scalaVersion).value == "2.13.4")
-  assert((scala213 / semanticdbCompilerPlugin).value.revision == "4.4.10")
+  assert((available / semanticdbEnabled).value == true)
+  assert((available / scalaVersion).value == "2.13.4")
+  assert((available / semanticdbCompilerPlugin).value.revision == "4.4.10")
   assert(
-    (scala213 / Test / compile / scalacOptions).value
+    (available / Test / compile / scalacOptions).value
       .count(_ == "-Yrangepos") == 1
   )
 }
 
 TaskKey[Unit]("checkVersion") := {
-  assert((scala213 / scalaVersion).value == "2.12.15")
+  assert((available / scalaVersion).value == "2.12.15")
 }

src/sbt-test/sbt-scalafix/scalafixEnable/test

@@ -2,9 +2,9 @@
 > scalafixEnable
 > check
 
--> scala212/test:compile
-> scala212/scalafixAll RemoveUnused
-> scala212/test:compile
+-> config/test:compile
+> config/scalafixAll RemoveUnused
+> config/test:compile
 
 -> checkVersion
 > ++2.12.15 -v

src/test/scala/scalafix/internal/sbt/ScalafixAPISuite.scala

@@ -16,8 +16,13 @@ class ScalafixAPISuite extends AnyFunSuite {
   def assertNoDiff(obtained: String, expected: String)(implicit
       pos: Position
   ): Unit = {
+    def removeSnapshotInfo(s: String) =
+      s.replaceAllLiterally(
+        "[info] Using SNAPSHOT artifacts for Scalafix and/or external rules, binary compatibility checks disabled",
+        ""
+      )
     def strip(s: String) = s.trim.replaceAll("\r\n", "\n")
-    val obtainedStrip = strip(obtained)
+    val obtainedStrip = strip(removeSnapshotInfo(obtained))
     val expectedStrip = strip(expected)
     assert(obtainedStrip == expectedStrip)
   }