readme.md

Prefix migrations with timestamp SBT task

Run in sbt console prefixMigrations

build.sbt

// build.sbt
// ...

import PrefixMigrations._
prefixMigrationSettings

PrefixMigrations.scala

// project/PrefixMigrations.scala

import java.nio.file.Files
import java.time.LocalDateTime
import java.time.format.DateTimeFormatter

import sbt._
import Keys._


object PrefixMigrations {
  val prefixMigrations = taskKey[Unit]("Adds timestamp prefix to database schema migration files")
  val prefixMigrationSettings = Seq[Setting[_]](
    prefixMigrations := {
      def isFilePrefixed(file: File): Boolean = {
        file.name.matches("^V\\d+__.*\\.sql$")
      }

      val formatter = DateTimeFormatter.ofPattern("yyyyMMddHHmmssSSS")
      val dir = new File("schema-migration/src/main/resources/db/migration")
      val files = dir.listFiles().toList

      files.filterNot(isFilePrefixed).foreach { file =>
        val timestamp = formatter.format(LocalDateTime.now())
        val newName = s"V${timestamp}__${file.name}"
        println(s"Renaming ${file.name} to ${newName}")
        Files.move(file.toPath, file.toPath.resolveSibling(newName))

        // Sleep for a moment to avoid prefix conflicts when renaming multiple files
        Thread.sleep(1*1000)
      }
    }
  )

}