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A Scala library for parsing and evaluating cron expressions.

• JDK 17 or later (compiled with --release 17)
• Scala 2.13.18 / 3.3.7 (cross-build supported)

Add the following to your build.sbt:

libraryDependencies += "com.github.j5ik2o" %% "chronos-parser-scala" % "<version>"

import com.github.j5ik2o.cron.CronSchedule
import java.time.{Instant, ZoneId}

val cronSchedule = CronSchedule("*/3 * * * *", ZoneId.systemDefault())
val upcoming = cronSchedule.upcoming(Instant.now()).take(5)
upcoming.foreach(println)

• CronSchedule(expr, zoneId) - Create a schedule from a cron expression
• schedule.upcoming(start) - Get a lazy list of upcoming instants matching the cron expression
• schedule.getInstantAfter(base, minutes) - Get the next matching instant within a given number of minutes
• CronParser.parse(expr) - Parse a cron expression into an AST

MIT License (see LICENSE)