support sbt 2

Author: xuwei-k

build.sbt

@@ -236,7 +236,7 @@ lazy val core = myCrossProject("core")
         }
         outFile
       }
-      Seq(downloadPlugin("1_0_0"), downloadPlugin("1_3_11"))
+      Seq(downloadPlugin("1_0_0"), downloadPlugin("1_3_11"), downloadPlugin("2_0_0"))
     }.taskValue
   )
 

modules/core/src/main/scala/org/scalasteward/core/buildtool/sbt/SbtAlg.scala

@@ -85,8 +85,9 @@ final class SbtAlg[F[_]](config: Config)(implicit
     for {
       _ <- Resource.unit[F]
       pluginVersion = maybeSbtVersion match {
-        case Some(v) if v < Version("1.3.11") => "1_0_0"
-        case _                                => "1_3_11"
+        case Some(v) if v < Version("1.3.11")    => "1_0_0"
+        case Some(v) if v.value.startsWith("2.") => "2_0_0"
+        case _                                   => "1_3_11"
       }
       plugin <- Resource.eval(stewardPlugin(pluginVersion))
       _ <- List

modules/core/src/test/scala/org/scalasteward/core/buildtool/sbt/SbtAlgTest.scala

@@ -46,6 +46,38 @@ class SbtAlgTest extends FunSuite {
     assertEquals(state, expected)
   }
 
+  test("sbt 2") {
+    val repo = Repo("sbt-alg", "test-2")
+    val buildRoot = BuildRoot(repo, ".")
+    val repoDir = workspaceAlg.repoDir(repo).unsafeRunSync()
+    val initial = MockState.empty
+      .addFiles(repoDir / "project" / "build.properties" -> "sbt.version=2.0.0-RC3")
+      .unsafeRunSync()
+    val state = sbtAlg.getDependencies(buildRoot).runS(initial).unsafeRunSync()
+    val expected = initial.copy(
+      trace = Vector(
+        Cmd("read", s"$repoDir/project/build.properties"),
+        Cmd("test", "-d", s"$repoDir/project"),
+        Cmd("test", "-d", s"$repoDir/project/project"),
+        Cmd("read", "classpath:StewardPlugin_2_0_0.scala"),
+        Cmd("write", s"$repoDir/project/scala-steward-StewardPlugin_2_0_0.scala"),
+        Cmd("write", s"$repoDir/project/project/scala-steward-StewardPlugin_2_0_0.scala"),
+        Cmd.execSandboxed(
+          repoDir,
+          "sbt",
+          "-Dsbt.color=false",
+          "-Dsbt.log.noformat=true",
+          "-Dsbt.supershell=false",
+          "-Dsbt.server.forcestart=true",
+          s";$crossStewardDependencies;$reloadPlugins;$stewardDependencies"
+        ),
+        Cmd("rm", "-rf", s"$repoDir/project/project/scala-steward-StewardPlugin_2_0_0.scala"),
+        Cmd("rm", "-rf", s"$repoDir/project/scala-steward-StewardPlugin_2_0_0.scala")
+      )
+    )
+    assertEquals(state, expected)
+  }
+
   test("runMigrations") {
     val repo = Repo("fthomas", "scala-steward")
     val buildRoot = BuildRoot(repo, ".")