feat: Add support for Flyway placeholders

Author: jakubjanecek

build.sbt

@@ -157,7 +157,10 @@ lazy val flyway = project
   .settings(BuildSettings.common)
   .settings(
     name := "sst-flyway",
-    libraryDependencies += Dependencies.flywayCore
+    libraryDependencies ++= List(
+      Dependencies.scalaCollectionCompat,
+      Dependencies.flywayCore
+    )
   )
 
 lazy val flywayPureConfig = project

flyway/src/main/scala/com/avast/sst/flyway/FlywayConfig.scala

@@ -22,5 +22,7 @@ final case class FlywayConfig(
     mixed: Boolean = false,
     locations: List[String] = List.empty,
     outOfOrder: Boolean = false,
-    validateOnMigrate: Boolean = true
+    validateOnMigrate: Boolean = true,
+    placeholderReplacement: Boolean = true,
+    placeholders: Map[String, String] = Map.empty
 )

flyway/src/main/scala/com/avast/sst/flyway/FlywayModule.scala

@@ -4,6 +4,8 @@ import cats.effect.Sync
 import javax.sql.DataSource
 import org.flywaydb.core.Flyway
 
+import scala.jdk.CollectionConverters._
+
 object FlywayModule {
 
   /** Makes [[org.flywaydb.core.Flyway]] from the given [[javax.sql.DataSource]] and config. */
@@ -24,6 +26,8 @@ object FlywayModule {
         .mixed(config.mixed)
         .outOfOrder(config.outOfOrder)
         .validateOnMigrate(config.validateOnMigrate)
+        .placeholderReplacement(config.placeholderReplacement)
+        .placeholders(config.placeholders.asJava)
 
       config.baselineVersion.foreach(builder.baselineVersion)
       config.targetVersion.foreach(builder.target)