maybe fix docker build for kafka pipe?? again????

modules/infra-kafka-pipe/build.gradle.kts

@@ -1,3 +1,4 @@
+import org.jetbrains.kotlin.incremental.md5
 import org.jetbrains.kotlin.util.parseSpaceSeparatedArgs
 
 plugins {
@@ -8,6 +9,11 @@ description = "Send events from a Factorio server to a Kafka topic "
 
 
 val dockerSrcDir: Directory by extra
+fun Directory.filesChecksum() = asFileTree
+  .files
+  .map { it.readBytes() + it.absolutePath.toByteArray() }
+  .fold(byteArrayOf()) { acc, bytes -> acc + bytes }
+  .md5()
 
 tasks.dockerUp {
   dependsOn(":modules:infra-kafka-cluster:dockerUp")
@@ -21,21 +27,30 @@ val dockerBuildKafkaPipe by tasks.registering(Exec::class) {
   dependsOn(tasks.dockerEnv)
 
   inputs.dir(dockerSrcDir)
+  inputs.property("dockerSrcDirChecksum") { dockerSrcDir.filesChecksum() }
 
-  val imageIdFile = file("$temporaryDir/docker-image-id.txt")
-  outputs.file(imageIdFile)
+  outputs.upToDateWhen {
+    it.inputs.properties["dockerSrcDirChecksum"] as? Long? == dockerSrcDir.filesChecksum()
+  }
+
+//  val imageIdFile = file("$temporaryDir/docker-image-id.txt")
+//  outputs.file(imageIdFile)
 
   workingDir = dockerSrcDir.asFile
   commandLine = parseSpaceSeparatedArgs(""" docker-compose build kafka-pipe """)
 
-  doLast {
-    imageIdFile.outputStream().use { os ->
-      exec {
-        workingDir = dockerSrcDir.asFile
-        commandLine = parseSpaceSeparatedArgs(""" docker-compose images -q kafka-pipe """)
-        standardOutput = os
-      }
-    }
-  }
+//  doLast {
+//    sync {
+//      from(dockerSrcDir)
+//      into(temporaryDir)
+//    }
+//    imageIdFile.outputStream().use { os ->
+//      exec {
+//        workingDir = dockerSrcDir.asFile
+//        commandLine = parseSpaceSeparatedArgs(""" docker-compose images -q kafka-pipe """)
+//        standardOutput = os
+//      }
+//    }
+//}
 }
 tasks.assemble { dependsOn(dockerBuildKafkaPipe) }