chore: Use scalafmt to group imports (#63)

Co-authored-by: Natsu Kagami <[email protected]>

.scalafmt.conf

@@ -1,3 +1,18 @@
-version = 3.7.17
+version = 3.8.1
 runner.dialect = scala3
 maxColumn = 120
+
+rewrite {
+  rules = [
+    Imports
+  ]
+
+  imports {
+    expand = false
+    sort = ascii
+    groups = [
+      ["gears\\..*"],
+      ["java.?\\..*", "scala\\..*"],
+    ]
+  }
+}

build.sbt

@@ -1,4 +1,4 @@
-import sbtcrossproject.CrossPlugin.autoImport.{crossProject, CrossType}
+import sbtcrossproject.CrossPlugin.autoImport.{CrossType, crossProject}
 import scalanative.build._
 
 ThisBuild / scalaVersion := "3.3.3"

jvm/src/main/scala/PosixLikeIO/PIO.scala

@@ -1,19 +1,20 @@
 package PosixLikeIO
 
-import gears.async.{Async, Future}
+import gears.async.Scheduler
 import gears.async.default.given
-import Future.Promise
+import gears.async.{Async, Future}
 
 import java.net.{DatagramPacket, DatagramSocket, InetAddress, InetSocketAddress, ServerSocket, Socket}
 import java.nio.ByteBuffer
 import java.nio.channels.{AsynchronousFileChannel, CompletionHandler, SocketChannel}
 import java.nio.charset.{Charset, StandardCharsets}
 import java.nio.file.{Path, StandardOpenOption}
+import java.util.concurrent.CancellationException
 import scala.Tuple.Union
 import scala.concurrent.ExecutionContext
 import scala.util.{Failure, Success, Try}
-import gears.async.Scheduler
-import java.util.concurrent.CancellationException
+
+import Future.Promise
 
 object File:
   extension (resolver: Future.Resolver[Int])

jvm/src/main/scala/PosixLikeIO/examples/clientAndServerUDP.scala

@@ -1,15 +1,16 @@
 package PosixLikeIO.examples
 
+import gears.async.AsyncOperations.*
 import gears.async.default.given
 import gears.async.{Async, Future}
-import gears.async.AsyncOperations.*
-import PosixLikeIO.{PIOHelper, SocketUDP}
 
 import java.net.DatagramPacket
 import java.nio.ByteBuffer
 import java.nio.file.StandardOpenOption
 import scala.concurrent.ExecutionContext
 
+import PosixLikeIO.{PIOHelper, SocketUDP}
+
 @main def clientAndServerUDP(): Unit =
   given ExecutionContext = ExecutionContext.global
   Async.blocking:

jvm/src/main/scala/PosixLikeIO/examples/readAndWriteFile.scala

@@ -2,13 +2,14 @@ package PosixLikeIO.examples
 
 import gears.async.Async
 import gears.async.default.given
-import PosixLikeIO.PIOHelper
 
 import java.nio.ByteBuffer
 import java.nio.charset.StandardCharsets
 import java.nio.file.StandardOpenOption
 import scala.concurrent.ExecutionContext
 
+import PosixLikeIO.PIOHelper
+
 @main def readAndWriteFile(): Unit =
   given ExecutionContext = ExecutionContext.global
   Async.blocking:

jvm/src/main/scala/PosixLikeIO/examples/readWholeFile.scala

@@ -2,13 +2,14 @@ package PosixLikeIO.examples
 
 import gears.async.Async
 import gears.async.default.given
-import PosixLikeIO.PIOHelper
 
 import java.nio.ByteBuffer
 import java.nio.charset.StandardCharsets
 import java.nio.file.StandardOpenOption
 import scala.concurrent.ExecutionContext
 
+import PosixLikeIO.PIOHelper
+
 @main def readWholeFile(): Unit =
   given ExecutionContext = ExecutionContext.global
   Async.blocking:

jvm/src/main/scala/async/VThreadSupport.scala

@@ -1,9 +1,9 @@
 package gears.async
 
-import scala.annotation.unchecked.uncheckedVariance
+import java.lang.invoke.{MethodHandles, VarHandle}
 import java.util.concurrent.locks.ReentrantLock
+import scala.annotation.unchecked.uncheckedVariance
 import scala.concurrent.duration.FiniteDuration
-import java.lang.invoke.{VarHandle, MethodHandles}
 
 object VThreadScheduler extends Scheduler:
   private val VTFactory = Thread

jvm/src/main/scala/measurements/measureTimes.scala

@@ -1,17 +1,18 @@
 package measurements
 
-import PosixLikeIO.PIOHelper
-import gears.async.{Async, BufferedChannel, ChannelMultiplexer, Future, SyncChannel}
 import gears.async.default.given
+import gears.async.{Async, BufferedChannel, ChannelMultiplexer, Future, SyncChannel}
 
 import java.io.{FileReader, FileWriter}
 import java.nio.file.{Files, NoSuchFileException, Paths, StandardOpenOption}
+import java.util.concurrent.atomic.AtomicInteger
 import scala.collection.mutable
 import scala.collection.mutable.{ArrayBuffer, HashMap}
 import scala.concurrent.ExecutionContext
-import java.util.concurrent.atomic.AtomicInteger
-import scala.util.Try
 import scala.util.CommandLineParser.FromString.given_FromString_Int
+import scala.util.Try
+
+import PosixLikeIO.PIOHelper
 
 case class TimeMeasurementResult(millisecondsPerOperation: Double, standardDeviation: Double)
 

jvm/src/test/scala/CancellationBehavior.scala

@@ -1,12 +1,14 @@
-import gears.async.{Async, Future, AsyncSupport, uninterruptible}
 import gears.async.AsyncOperations.*
 import gears.async.default.given
-import scala.util.boundary
-import boundary.break
-import scala.concurrent.duration.{Duration, DurationInt}
+import gears.async.{Async, AsyncSupport, Future, uninterruptible}
+
 import java.util.concurrent.CancellationException
-import scala.util.Success
+import scala.concurrent.duration.{Duration, DurationInt}
 import scala.util.Properties
+import scala.util.Success
+import scala.util.boundary
+
+import boundary.break
 
 // JVM-only since `munitTimeout` is not available on scala native.
 // See (here)[https://scalameta.org/munit/docs/tests.html#customize-test-timeouts].

native/src/main/scala/async/ForkJoinSupport.scala

@@ -1,14 +1,15 @@
 package gears.async.native
 
+import gears.async.Future.Promise
 import gears.async._
-import scala.scalanative.runtime.{Continuations => nativeContinuations}
+
+import java.util.concurrent.CancellationException
 import java.util.concurrent.ForkJoinPool
+import java.util.concurrent.atomic.AtomicBoolean
 import scala.concurrent.ExecutionContext
 import scala.concurrent.JavaConversions._
 import scala.concurrent.duration._
-import java.util.concurrent.atomic.AtomicBoolean
-import gears.async.Future.Promise
-import java.util.concurrent.CancellationException
+import scala.scalanative.runtime.{Continuations => nativeContinuations}
 
 class NativeContinuation[-T, +R] private[native] (val cont: T => R) extends Suspension[T, R]:
   def resume(arg: T): R = cont(arg)

shared/src/main/scala/async/Async.scala

@@ -1,10 +1,12 @@
 package gears.async
+
+import gears.async.Listener.NumberedLock
+import gears.async.Listener.withLock
+
 import java.util.concurrent.atomic.AtomicBoolean
-import scala.collection.mutable
-import java.util.concurrent.locks.ReentrantLock
 import java.util.concurrent.atomic.AtomicLong
-import gears.async.Listener.withLock
-import gears.async.Listener.NumberedLock
+import java.util.concurrent.locks.ReentrantLock
+import scala.collection.mutable
 import scala.util.boundary
 
 /** The async context: provides the capability to asynchronously [[Async.await await]] for [[Async.Source Source]]s, and

shared/src/main/scala/async/AsyncOperations.scala

@@ -1,9 +1,10 @@
 package gears.async
 
-import scala.concurrent.duration.FiniteDuration
-import java.util.concurrent.TimeoutException
 import gears.async.AsyncOperations.sleep
 
+import java.util.concurrent.TimeoutException
+import scala.concurrent.duration.FiniteDuration
+
 /** Defines fundamental operations that require the support of the scheduler. This is commonly provided alongside with
   * the given implementation of [[Scheduler]].
   * @see

shared/src/main/scala/async/CompletionGroup.scala

@@ -1,8 +1,9 @@
 package gears.async
 import scala.collection.mutable
-import Future.Promise
 import scala.util.Success
 
+import Future.Promise
+
 /** A group of cancellable objects that are completed together. Cancelling the group means cancelling all its
   * uncompleted members.
   */

shared/src/main/scala/async/Listener.scala

@@ -1,8 +1,9 @@
 package gears.async
 
-import scala.annotation.tailrec
 import gears.async.Async.Source
+
 import java.util.concurrent.locks.ReentrantLock
+import scala.annotation.tailrec
 
 /** A listener, representing an one-time value receiver of an [[Async.Source]].
   *

shared/src/main/scala/async/ScalaConverters.scala

@@ -1,7 +1,7 @@
 package gears.async
 
-import scala.concurrent.{Future as StdFuture, Promise as StdPromise}
 import scala.concurrent.ExecutionContext
+import scala.concurrent.{Future as StdFuture, Promise as StdPromise}
 import scala.util.Try
 
 /** Converters from Gears types to Scala API types and back. */

shared/src/main/scala/async/Timer.scala

@@ -1,16 +1,17 @@
 package gears.async
 
-import Future.Promise
-import AsyncOperations.sleep
+import gears.async.Listener
 
+import java.util.concurrent.CancellationException
 import java.util.concurrent.TimeoutException
+import scala.annotation.tailrec
 import scala.collection.mutable
 import scala.concurrent.TimeoutException
-import scala.util.{Failure, Success, Try}
-import gears.async.Listener
 import scala.concurrent.duration._
-import scala.annotation.tailrec
-import java.util.concurrent.CancellationException
+import scala.util.{Failure, Success, Try}
+
+import AsyncOperations.sleep
+import Future.Promise
 
 /** Timer exposes a steady [[Async.Source]] of ticks that happens every `tickDuration` milliseconds. Note that the timer
   * does not start ticking until `start` is called (which is a blocking operation, until the timer is cancelled).

shared/src/main/scala/async/channels.scala

@@ -1,15 +1,14 @@
 package gears.async
-import scala.collection.mutable
-import mutable.{ArrayBuffer, ListBuffer}
-
-import scala.util.{Failure, Success, Try}
-
-import scala.util.control.Breaks.{break, breakable}
 import gears.async.Async.Source
-import gears.async.listeners.lockBoth
 import gears.async.Listener.acceptingListener
+import gears.async.listeners.lockBoth
+
+import scala.collection.mutable
+import scala.util.control.Breaks.{break, breakable}
+import scala.util.{Failure, Success, Try}
 
 import Channel.{Closed, Res}
+import mutable.{ArrayBuffer, ListBuffer}
 
 /** The part of a channel one can send values to. Blocking behavior depends on the implementation.
   */

shared/src/main/scala/async/futures.scala

@@ -1,14 +1,14 @@
 package gears.async
 
-import scala.collection.mutable
-import java.util.concurrent.atomic.AtomicBoolean
 import java.util.concurrent.CancellationException
-import scala.compiletime.uninitialized
-import scala.annotation.unchecked.uncheckedVariance
+import java.util.concurrent.atomic.AtomicBoolean
 import scala.annotation.tailrec
+import scala.annotation.unchecked.uncheckedVariance
+import scala.collection.mutable
+import scala.compiletime.uninitialized
 import scala.util
-import scala.util.{Failure, Success, Try}
 import scala.util.control.NonFatal
+import scala.util.{Failure, Success, Try}
 
 /** Futures are [[Async.Source Source]]s that has the following properties:
   *   - They represent a single value: Once resolved, [[Async.await await]]-ing on a [[Future]] should always return the

shared/src/main/scala/async/listeners/locking.scala

@@ -2,9 +2,11 @@
 package gears.async.listeners
 
 import gears.async._
-import Listener.ListenerLock
+
 import scala.annotation.tailrec
 
+import Listener.ListenerLock
+
 /** Two listeners being locked at the same time, while having the same [[Listener.ListenerLock.selfNumber lock number]].
   */
 case class ConflictingLocksException(

shared/src/main/scala/async/retry.scala

@@ -1,15 +1,15 @@
 package gears.async
 
-import scala.util.Random
-import scala.util.{Try, Success, Failure}
-import scala.util.boundary
-import scala.util.control.NonFatal
-import scala.concurrent.duration._
-
 import gears.async.Async
 import gears.async.AsyncOperations.sleep
 import gears.async.Retry.Delay
 
+import scala.concurrent.duration._
+import scala.util.Random
+import scala.util.boundary
+import scala.util.control.NonFatal
+import scala.util.{Failure, Success, Try}
+
 /** Utility class to perform asynchronous actions with retrying policies on exceptions.
   *
   * See [[Retry]] companion object for common policies as a starting point.

shared/src/test/scala/CancellationBehavior.scala

@@ -1,11 +1,13 @@
-import gears.async.{Async, Future, AsyncSupport, uninterruptible}
 import gears.async.AsyncOperations.*
 import gears.async.default.given
-import scala.util.boundary
-import boundary.break
-import scala.concurrent.duration.{Duration, DurationInt}
+import gears.async.{Async, AsyncSupport, Future, uninterruptible}
+
 import java.util.concurrent.CancellationException
+import scala.concurrent.duration.{Duration, DurationInt}
 import scala.util.Success
+import scala.util.boundary
+
+import boundary.break
 
 class CancellationBehavior extends munit.FunSuite:
   enum State:

shared/src/test/scala/ChannelBehavior.scala

@@ -1,3 +1,5 @@
+import gears.async.AsyncOperations.*
+import gears.async.default.given
 import gears.async.{
   Async,
   BufferedChannel,
@@ -9,19 +11,18 @@ import gears.async.{
   TaskSchedule,
   UnboundedChannel
 }
-import gears.async.default.given
-import gears.async.AsyncOperations.*
-import Future.zip
 
+import java.nio.ByteBuffer
 import java.util.concurrent.CancellationException
+import java.util.concurrent.atomic.AtomicInteger
+import scala.collection.Stepper.UnboxingFloatStepper
 import scala.collection.mutable
+import scala.collection.mutable.{ArrayBuffer, Set}
 import scala.concurrent.ExecutionContext
-import scala.util.{Failure, Success, Try}
 import scala.util.Random
-import scala.collection.mutable.{ArrayBuffer, Set}
-import java.util.concurrent.atomic.AtomicInteger
-import java.nio.ByteBuffer
-import scala.collection.Stepper.UnboxingFloatStepper
+import scala.util.{Failure, Success, Try}
+
+import Future.zip
 
 class ChannelBehavior extends munit.FunSuite {