Run syntactic build migrations with the Scalafix CLI

Author: DavidGregory084

.editorconfig

@@ -0,0 +1,5 @@
+root = true
+
+[*.{scala,sbt}]
+indent_size = 2
+indent_style = space

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

@@ -25,7 +25,7 @@ import org.scalasteward.core.buildtool.sbt.command._
 import org.scalasteward.core.buildtool.{BuildRoot, BuildToolAlg}
 import org.scalasteward.core.coursier.VersionsCache
 import org.scalasteward.core.data.{Dependency, Scope, Version}
-import org.scalasteward.core.edit.scalafix.ScalafixMigration
+import org.scalasteward.core.edit.scalafix.{ScalafixCli, ScalafixMigration}
 import org.scalasteward.core.io.process.SlurpOptions
 import org.scalasteward.core.io.{FileAlg, FileData, ProcessAlg, WorkspaceAlg}
 import org.scalasteward.core.util.Nel
@@ -34,6 +34,7 @@ import org.scalasteward.core.buildtool.sbt.scalaStewardSbtScalafix
 final class SbtAlg[F[_]](config: Config)(implicit
     fileAlg: FileAlg[F],
     processAlg: ProcessAlg[F],
+    scalafixCli: ScalafixCli[F],
     workspaceAlg: WorkspaceAlg[F],
     versionsCache: VersionsCache[F],
     F: Concurrent[F]
@@ -116,9 +117,29 @@ final class SbtAlg[F[_]](config: Config)(implicit
     for {
       buildRootDir <- workspaceAlg.buildRootDir(buildRoot)
       metaBuilds <- metaBuildsCount(buildRootDir)
+      _ <- runSyntacticBuildMigrations(buildRootDir, migration)
       _ <- runSbtScalafix(buildRootDir, migration, metaBuilds, startDepth = 1)
     } yield ()
 
+  private def runSyntacticBuildMigrations(
+      buildRootDir: File,
+      migration: ScalafixMigration
+  ): F[Unit] = {
+    val rootSbtFiles =
+      fileAlg.walk(buildRootDir, 1).filter(_.extension.contains(".sbt"))
+
+    val metaBuildFiles =
+      fileAlg.walk(buildRootDir / project, 3).filter(_.extension.exists(Set(".sbt", ".scala")))
+
+    val allBuildFiles = (rootSbtFiles ++ metaBuildFiles).compile.toList
+
+    allBuildFiles.flatMap { buildFiles =>
+      Nel.fromList(buildFiles).fold(F.unit) { files =>
+        scalafixCli.runMigration(buildRootDir, files, migration)
+      }
+    }
+  }
+
   private def latestSbtScalafixVersion: F[Option[Version]] =
     versionsCache
       .getVersions(Scope(sbtScalafixDependency, List(config.defaultResolver)), None)

modules/core/src/main/scala/org/scalasteward/core/edit/scalafix/ScalafixCli.scala

@@ -31,7 +31,7 @@ final class ScalafixCli[F[_]](implicit
 ) {
   def runMigration(workingDir: File, files: Nel[File], migration: ScalafixMigration): F[Unit] = {
     val rules = migration.rewriteRules.map("--rules=" + _)
-    val cmd = scalafixBinary :: rules ::: files.map(_.pathAsString)
+    val cmd = scalafixBinary :: "--syntactic" :: rules ::: files.map(_.pathAsString)
     processAlg.exec(cmd, workingDir, slurpOptions = SlurpOptions.ignoreBufferOverflow).void
   }
 

modules/core/src/main/scala/org/scalasteward/core/io/FileAlg.scala

@@ -136,7 +136,13 @@ object FileAlg {
         Resource.fromAutoCloseable(source).use(src => F.blocking(src.mkString))
 
       override def walk(dir: File, maxDepth: Int): Stream[F, File] =
-        Stream.eval(F.delay(dir.walk(maxDepth))).flatMap(Stream.fromBlockingIterator(_, 1))
+        Stream.force(
+          F.blocking(dir.exists)
+            .ifF(
+              Stream.eval(F.delay(dir.walk(maxDepth))).flatMap(Stream.fromBlockingIterator(_, 1)),
+              Stream.empty.covary[F]
+            )
+        )
 
       override def writeFile(file: File, content: String): F[Unit] =
         logger.debug(s"Write $file") >>

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

@@ -6,6 +6,7 @@ import org.scalasteward.core.buildtool.BuildRoot
 import org.scalasteward.core.buildtool.sbt.command._
 import org.scalasteward.core.data.{GroupId, Repo, Version}
 import org.scalasteward.core.edit.scalafix.ScalafixMigration
+import org.scalasteward.core.edit.scalafix.ScalafixCli._
 import org.scalasteward.core.mock.MockContext.context._
 import org.scalasteward.core.mock.MockState
 import org.scalasteward.core.mock.MockState.TraceEntry.Cmd
@@ -138,13 +139,23 @@ class SbtAlgTest extends FunSuite {
     )
     val initialState = MockState.empty
       .addFiles(
+        repoDir / "build.sbt" -> "",
         workspace / s"store/versions/v2/https/repo1.maven.org/maven2/ch/epfl/scala/sbt-scalafix_2.12_1.0/versions.json" -> sbtScalafixVersionJson
       )
       .unsafeRunSync()
     val state = sbtAlg.runMigration(buildRoot, migration).runS(initialState).unsafeRunSync()
     val expected = initialState.copy(
       trace = Vector(
         Cmd("test", "-d", s"$repoDir/project"),
+        Cmd(
+          "VAR1=val1",
+          "VAR2=val2",
+          repoDir.pathAsString,
+          scalafixBinary,
+          "--syntactic",
+          "--rules=github:typelevel/sbt-tpolecat/v0_5?sha=v0.5.0",
+          s"$repoDir/build.sbt"
+        ),
         Cmd(
           "read",
           s"$workspace/store/versions/v2/https/repo1.maven.org/maven2/ch/epfl/scala/sbt-scalafix_2.12_1.0/versions.json"
@@ -178,7 +189,9 @@ class SbtAlgTest extends FunSuite {
     )
     val initialState = MockState.empty
       .addFiles(
-        repoDir / "project" / "Dependencies.scala" -> "object Dependencies", // put anything at all into the meta-build
+        repoDir / "build.sbt" -> "",
+        repoDir / "project" / "plugins.sbt" -> "",
+        repoDir / "project" / "Dependencies.scala" -> "object Dependencies",
         workspace / s"store/versions/v2/https/repo1.maven.org/maven2/ch/epfl/scala/sbt-scalafix_2.12_1.0/versions.json" -> sbtScalafixVersionJson
       )
       .unsafeRunSync()
@@ -187,6 +200,17 @@ class SbtAlgTest extends FunSuite {
       trace = Vector(
         Cmd("test", "-d", s"$repoDir/project"),
         Cmd("test", "-d", s"$repoDir/project/project"),
+        Cmd(
+          "VAR1=val1",
+          "VAR2=val2",
+          repoDir.pathAsString,
+          scalafixBinary,
+          "--syntactic",
+          "--rules=github:typelevel/sbt-tpolecat/v0_5?sha=v0.5.0",
+          s"$repoDir/build.sbt",
+          s"$repoDir/project/Dependencies.scala",
+          s"$repoDir/project/plugins.sbt"
+        ),
         Cmd(
           "read",
           s"$workspace/store/versions/v2/https/repo1.maven.org/maven2/ch/epfl/scala/sbt-scalafix_2.12_1.0/versions.json"
@@ -224,13 +248,23 @@ class SbtAlgTest extends FunSuite {
     )
     val initialState = MockState.empty
       .addFiles(
+        repoDir / "build.sbt" -> "",
         workspace / s"store/versions/v2/https/repo1.maven.org/maven2/ch/epfl/scala/sbt-scalafix_2.12_1.0/versions.json" -> sbtScalafixVersionJson
       )
       .unsafeRunSync()
     val state = sbtAlg.runMigration(buildRoot, migration).runS(initialState).unsafeRunSync()
     val expected = initialState.copy(
       trace = Vector(
         Cmd("test", "-d", s"$repoDir/project"),
+        Cmd(
+          "VAR1=val1",
+          "VAR2=val2",
+          repoDir.pathAsString,
+          scalafixBinary,
+          "--syntactic",
+          "--rules=github:typelevel/sbt-tpolecat/v0_5?sha=v0.5.0",
+          s"$repoDir/build.sbt"
+        ),
         Cmd(
           "read",
           s"$workspace/store/versions/v2/https/repo1.maven.org/maven2/ch/epfl/scala/sbt-scalafix_2.12_1.0/versions.json"
@@ -267,7 +301,9 @@ class SbtAlgTest extends FunSuite {
     )
     val initialState = MockState.empty
       .addFiles(
-        repoDir / "project" / "Dependencies.scala" -> "object Dependencies", // put anything at all into the meta-build
+        repoDir / "build.sbt" -> "",
+        repoDir / "project" / "plugins.sbt" -> "",
+        repoDir / "project" / "Dependencies.scala" -> "object Dependencies",
         workspace / s"store/versions/v2/https/repo1.maven.org/maven2/ch/epfl/scala/sbt-scalafix_2.12_1.0/versions.json" -> sbtScalafixVersionJson
       )
       .unsafeRunSync()
@@ -276,6 +312,17 @@ class SbtAlgTest extends FunSuite {
       trace = Vector(
         Cmd("test", "-d", s"$repoDir/project"),
         Cmd("test", "-d", s"$repoDir/project/project"),
+        Cmd(
+          "VAR1=val1",
+          "VAR2=val2",
+          repoDir.pathAsString,
+          scalafixBinary,
+          "--syntactic",
+          "--rules=github:typelevel/sbt-tpolecat/v0_5?sha=v0.5.0",
+          s"$repoDir/build.sbt",
+          s"$repoDir/project/Dependencies.scala",
+          s"$repoDir/project/plugins.sbt"
+        ),
         Cmd(
           "read",
           s"$workspace/store/versions/v2/https/repo1.maven.org/maven2/ch/epfl/scala/sbt-scalafix_2.12_1.0/versions.json"