Add isAtomic to ScalafixPatch interface

.gitignore

@@ -44,3 +44,6 @@ metals.sbt
 
 # Scala CLI specific
 .scala-build/
+
+# Emacs Backups
+*~

scalafix-cli/src/main/scala/scalafix/internal/interfaces/ScalafixPatchImpl.scala

@@ -24,4 +24,7 @@ case class ScalafixPatchImpl(patch: Patch)(
         ): ScalafixTextEdit
       }
       .toArray
+
+  override def isAtomic: Boolean =
+    patch.isInstanceOf[Patch.internal.AtomicPatch]
 }

scalafix-interfaces/src/main/java/scalafix/interfaces/ScalafixPatch.java

@@ -8,4 +8,12 @@ public interface ScalafixPatch {
     default ScalafixTextEdit[] textEdits() {
         throw new UnsupportedOperationException("textEdits() is not implemented");
     }
+
+    /**
+     *
+     * @return True if this patch is atomic, else false.
+     */
+    default boolean isAtomic() {
+        throw new UnsupportedOperationException("isAtomic() is not implemented");
+    }
 }

scalafix-tests/integration/src/test/scala/scalafix/tests/interfaces/ScalafixArgumentsSuite.scala

@@ -18,6 +18,7 @@ import scalafix.interfaces.ScalafixDiagnostic
 import scalafix.interfaces.ScalafixFileEvaluationError
 import scalafix.interfaces.ScalafixMainCallback
 import scalafix.interfaces.ScalafixMainMode
+import scalafix.interfaces.ScalafixPatch
 import scalafix.internal.interfaces.ScalafixArgumentsImpl
 import scalafix.internal.rule.RemoveUnused
 import scalafix.internal.rule.RemoveUnusedConfig
@@ -572,6 +573,27 @@ class ScalafixArgumentsSuite extends AnyFunSuite with DiffAssertions {
     )
   }
 
+  test("ScalafixPatch isAtomic") {
+    val cwd: Path = StringFS
+      .string2dir(
+        """|/src/Main.scala
+          |
+          |object Main extends App""".stripMargin,
+        charset
+      )
+      .toNIO
+    val src = cwd.resolve("src")
+
+    def patches(rules: List[String]): Array[ScalafixPatch] = {
+      val run = api.withRules(rules.asJava).withSourceroot(src)
+      val fileEvaluation = run.evaluate().getFileEvaluations.head
+      fileEvaluation.getPatches
+    }
+
+    assert(patches(List("CommentFileAtomic")).forall(_.isAtomic))
+    assert(patches(List("CommentFileNonAtomic")).forall(!_.isAtomic))
+  }
+
   test("com.github.liancheng::organize-imports is ignored") {
     val rules = api
       .withToolClasspath(