Merge pull request #1729 from bjaglin/scala211

drop support for Scala 2.11

Author: bjaglin

.github/workflows/ci.yml

@@ -12,7 +12,6 @@ jobs:
       fail-fast: false
       matrix:
         command:
-          - "ci-211"
           - "ci-212"
           - "ci-213"
           - "ci-3"
@@ -40,7 +39,7 @@ jobs:
       - run: sbt ci-213
 
   jdk17_213:
-    name: JDK117/scala_2.13 tests
+    name: JDK17/scala_2.13 tests
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3

bin/test-release.sh

@@ -5,16 +5,12 @@ version=$1
 
 cs resolve \
   ch.epfl.scala:scalafix-interfaces:$version  \
-  ch.epfl.scala:scalafix-core_2.11:$version  \
   ch.epfl.scala:scalafix-core_2.12:$version  \
   ch.epfl.scala:scalafix-core_2.13:$version  \
-  ch.epfl.scala:scalafix-reflect_2.11.12:$version  \
   ch.epfl.scala:scalafix-reflect_2.12.17:$version  \
   ch.epfl.scala:scalafix-reflect_2.13.10:$version  \
-  ch.epfl.scala:scalafix-cli_2.11.12:$version  \
   ch.epfl.scala:scalafix-cli_2.12.17:$version  \
   ch.epfl.scala:scalafix-cli_2.13.10:$version  \
-  ch.epfl.scala:scalafix-testkit_2.11.12:$version  \
   ch.epfl.scala:scalafix-testkit_2.12.17:$version \
   ch.epfl.scala:scalafix-testkit_2.13.10:$version \
   -r sonatype:public

build.sbt

@@ -35,7 +35,6 @@ lazy val interfaces = projectMatrix
       props.put("scalametaVersion", scalametaV)
       props.put("scala213", scala213)
       props.put("scala212", scala212)
-      props.put("scala211", scala211)
       val out =
         (Compile / managedResourceDirectories).value.head /
           "scalafix-interfaces.properties"
@@ -78,10 +77,7 @@ lazy val core = projectMatrix
         )
       }
     },
-    libraryDependencies += {
-      if (isScala211.value) metaconfigFor211
-      else metaconfig
-    }
+    libraryDependencies += metaconfig
   )
   .defaultAxes(VirtualAxis.jvm)
   .jvmPlatform(buildScalaVersions)
@@ -148,7 +144,7 @@ lazy val cli = projectMatrix
         Seq()
     },
     libraryDependencies ++= {
-      if (isScala211.value || isScala3.value) Seq()
+      if (isScala3.value) Seq()
       else
         Seq(
           // metaconfig 0.10.0 shaded pprint but rules built with an old
@@ -361,11 +357,6 @@ lazy val unit = projectMatrix
     axisValues = Seq(TargetAxis(scala212)),
     settings = Seq()
   )
-  .jvmPlatform(
-    scalaVersions = Seq(scala211),
-    axisValues = Seq(TargetAxis(scala211)),
-    settings = Seq()
-  )
   .enablePlugins(BuildInfoPlugin)
   .dependsOn(testkit)
 
@@ -378,8 +369,7 @@ lazy val docs = projectMatrix
     scalacOptions += "-Wconf:msg='match may not be exhaustive':s", // silence exhaustive pattern matching warning for documentation
     scalacOptions += "-Xfatal-warnings",
     mdoc := (Compile / run).evaluated,
-    libraryDependencies += (if (isScala211.value) metaconfigDocFor211
-                            else metaconfigDoc)
+    libraryDependencies += metaconfigDoc
   )
   .defaultAxes(VirtualAxis.jvm)
   .jvmPlatform(scalaVersions = Seq(scala213))

docs/developers/cross-publish-custom-rules.md

@@ -17,7 +17,7 @@ For most rules, this change requires only modifying the build settings as follow
 ```diff
  // build.sbt
  scalaVersion := V.scala212,
-+crossScalaVersions := List(V.scala213, V.scala212, V.scala211),
++crossScalaVersions := List(V.scala213, V.scala212),
 ```
 The second step is to update your CI to run tests on the different
 scala versions your rule is being cross-published to. For that, you only

docs/developers/setup.md

@@ -100,7 +100,6 @@ that is either supported by
 [SemanticDB](https://scalameta.org/docs/semanticdb/specification.html) compiler
 plugin or built-in in the compiler. Supported Scala compiler versions include:
 
-- Scala @SCALA211@
 - Scala @SCALA212@
 - Scala @SCALA213@
 - Scala 3.x

docs/rules/ExplicitResultTypes.md

@@ -5,7 +5,7 @@ title: ExplicitResultTypes
 ---
 
 This rewrite inserts type annotations for inferred public members. Only compatible with 
-scala 2.11, 2.12 & 2.13.
+scala 2.12 & 2.13.
 
 Example:
 

docs/rules/NoAutoTupling.md

@@ -8,7 +8,7 @@ Adds explicit tuples around argument lists where auto-tupling is occurring.
 
 To use this rule:
 
-- enable `-Ywarn-adapted-args` for Scala 2.11 and 2.12 (note, `-Yno-adapted-args` will fail compilation,
+- enable `-Ywarn-adapted-args` for Scala 2.12 (note, `-Yno-adapted-args` will fail compilation,
   which prevents scalafix from running). For Scala 2.13, use instead `-Xlint:adapted-args`.
 - enable also `-deprecation` to get warnings on insertions of `Unit`.
 

docs/rules/RemoveUnused.md

@@ -67,7 +67,7 @@ object Main {
 }
 ```
 
-Remove unused pattern match variables (Scala 2.12 & 2.13 only):
+Remove unused pattern match variables:
 
 ```scala
 case class AB(a: Int, b: String)
@@ -87,7 +87,7 @@ object Main {
 }
 ```
 
-Remove unused function parameters (Scala 2.12 & 2.13 only):
+Remove unused function parameters:
 
 ```scala
 // before
@@ -134,8 +134,6 @@ println(scalafix.website.rule("RemoveUnused", RemoveUnusedConfig.default))
 Consult `scala -Y` in the command-line for more information about using
 `-Ywarn-unused`.
 
-For Scala @SCALA212@ & @SCALA213@
-
 ```
 $ scala -Ywarn-unused:help
 Enable or disable specific `unused' warnings
@@ -148,12 +146,4 @@ Enable or disable specific `unused' warnings
   params     Enable -Ywarn-unused:explicits,implicits.
   linted     -Xlint:unused.
 Default: All choices are enabled by default.
-```
-
-For Scala @SCALA211@
-
-```
-$ scala -Y | grep warn-unused
-  -Ywarn-unused                           Warn when local and private vals, vars, defs, and types are unused.
-  -Ywarn-unused-import                    Warn when imports are unused.
-```
+```

docs/users/installation.md

@@ -10,7 +10,7 @@ pull request is tested on both Linux and Windows.
 
 **Java 8 or Java 11.**
 
-**Scala 2.11, 2.12 or 2.13**
+**Scala 2.12 and 2.13**
 
 **Scala 3.x**: Scala 3 support is experimental and many built-in rules are not
 supported.
@@ -79,7 +79,7 @@ the Scala compiler option `-Ywarn-unused-import` (or `-Wunused:imports` in
   */
  inThisBuild(
    List(
-     scalaVersion := "@SCALA212@", // @SCALA211@, @SCALA213@, or 3.x
+     scalaVersion := "@SCALA212@", // @SCALA213@, or 3.x
 +    semanticdbEnabled := true, // enable SemanticDB
 +    semanticdbVersion := scalafixSemanticdb.revision // only required for Scala 2.x
    )
@@ -97,7 +97,7 @@ the Scala compiler option `-Ywarn-unused-import` (or `-Wunused:imports` in
   * https://www.scala-sbt.org/1.x/docs/sbt-1.3-Release-Notes.html#SemanticDB+support
   */
  lazy val myproject = project.settings(
-   scalaVersion := "@SCALA212@", // @SCALA211@, @SCALA213@, or 3.x
+   scalaVersion := "@SCALA212@", // @SCALA213@, or 3.x
 +  semanticdbEnabled := true, // enable SemanticDB
 +  semanticdbVersion := scalafixSemanticdb.revision, // only required for Scala 2.x
 +  scalacOptions += "-Ywarn-unused-import" // Scala 2.x only, required by `RemoveUnused`

project/Dependencies.scala

@@ -7,13 +7,12 @@ import scala.util.Try
 /* scalafmt: { maxColumn = 120 }*/
 
 object Dependencies {
-  val scala211 = "2.11.12"
   val scala212 = "2.12.17"
   val scala213 = "2.13.10"
   val scala3 = "3.2.1"
 
-  val buildScalaVersions = Seq(scala211, scala212, scala213, scala3)
-  val testTargetScalaVersions = Seq(scala211, scala212, scala213, scala3)
+  val buildScalaVersions = Seq(scala212, scala213, scala3)
+  val testTargetScalaVersions = Seq(scala212, scala213, scala3)
 
   // we support 3 last binary versions of scala212 and scala213
   val testedPreviousScalaVersions: Map[String, List[String]] =
@@ -27,12 +26,10 @@ object Dependencies {
   val googleDiffV = "1.3.0"
   val java8CompatV = "0.9.1"
   val jgitV = "5.13.1.202206130422-r"
-  val metaconfigFor211V = "0.9.10" // metaconfig stops publishing for scala 2.11
   val metaconfigV = "0.11.1"
   val pprintV = "0.6.6" // don't bump, rules built against metaconfig 0.9.15 or earlier would not link
   val nailgunV = "0.9.1"
   val scalaXmlV = "2.1.0"
-  val scalaXml211V = "1.3.0" // scala-xml stops publishing for scala 2.11
   val scalametaV = "4.6.0"
   val scalatestMinV = "3.0.8" // don't bump, to avoid forcing breaking changes on clients via eviction
   val scalatestLatestV = "3.2.13"
@@ -47,15 +44,12 @@ object Dependencies {
   val googleDiff = "com.googlecode.java-diff-utils" % "diffutils" % googleDiffV
   val java8Compat = "org.scala-lang.modules" %% "scala-java8-compat" % java8CompatV
   val jgit = "org.eclipse.jgit" % "org.eclipse.jgit" % jgitV
-  val metaconfigFor211 = "com.geirsson" %% "metaconfig-typesafe-config" % metaconfigFor211V
   val metaconfig = "com.geirsson" %% "metaconfig-typesafe-config" % metaconfigV
   val pprint = "com.lihaoyi" %% "pprint" % pprintV
-  val metaconfigDocFor211 = "com.geirsson" %% "metaconfig-docs" % metaconfigFor211V
   val metaconfigDoc = "com.geirsson" %% "metaconfig-docs" % metaconfigV
   val metacp = "org.scalameta" %% "metacp" % scalametaV
   val nailgunServer = "com.martiansoftware" % "nailgun-server" % nailgunV
   val scalaXml = "org.scala-lang.modules" %% "scala-xml" % scalaXmlV
-  val scalaXml211 = "org.scala-lang.modules" %% "scala-xml" % scalaXml211V
   // https://github.com/scalameta/scalameta/issues/2485
   val scalameta = ("org.scalameta" %% "scalameta" % scalametaV)
     .cross(CrossVersion.for3Use2_13)