migration.gradle.kts

val currentPackageName = extra["package.old"] as String
val newPackageName = extra["package.new"] as String
val currentPackage = currentPackageName.replace(".", "/")
val newPackage = newPackageName.replace(".", "/")

infix fun String.oldPath(main: String) = "$rootDir/$this/src/$main/kotlin/$currentPackage"
infix fun String.newPath(main: String) = "$rootDir/$this/src/$main/kotlin/$newPackage"
infix fun String.delete(main: String) =
    "$rootDir/$this/src/$main/kotlin/${currentPackage.split("/")[0]}"


val copyPackageFiles by tasks.registering {
    doFirst {
        copy {
            from("androidApp" oldPath "main")
            into("androidApp" newPath "main")
        }

        copy {
            from("shared" oldPath "commonMain")
            into("shared" newPath "commonMain")
        }

        copy {
            from("shared" oldPath "androidMain")
            into("shared" newPath "androidMain")
        }

        copy {
            from("shared" oldPath "desktopMain")
            into("shared" newPath "desktopMain")
        }

        copy {
            from("shared" oldPath "iosMain")
            into("shared" newPath "iosMain")
        }

        copy {
            from("shared" oldPath "jsMain")
            into("shared" newPath "jsMain")
        }
    }
}

val renamePackage by tasks.registering {
    doFirst {
        rootDir.walk().filter { it.extension == "kt" || it.name == "build.gradle.kts" }
            .forEach {
                if (it.readText().contains(currentPackageName)) it.writeText(
                    it.readText().replace(currentPackageName, newPackageName)
                )
            }
    }
}

val deleteOldPackage by tasks.registering {
    doFirst {
        delete("androidApp" delete "main")
        delete("shared" delete "commonMain")
        delete("shared" delete "androidMain")
        delete("shared" delete "desktopMain")
        delete("shared" delete "iosMain")
        delete("shared" delete "jsMain")
    }
}
deleteOldPackage { dependsOn(copyPackageFiles) }
copyPackageFiles { dependsOn(renamePackage) }
renamePackage { shouldRunAfter(deleteOldPackage) }

tasks.register<Sync>("packageMigrationTask") {
    dependsOn(renamePackage)
    dependsOn(copyPackageFiles)
    dependsOn(deleteOldPackage)
}