TimWSpence

Keybase proof

I hereby claim:

• I am timwspence on github.
• I am timwspence (https://keybase.io/timwspence) on keybase.
• I have a public key ASA8HHXZfi9repE2J0wYPFhsvAN92JPgCSLct5zdGJTg4go

To claim this, I am signing this object:

TimWSpence

 ERROR akka://ENSIME/user/ensime-main/project/scalac/root_compile a.a.OneForOneStrategy - Method org/scalameta/paradise/typechecker/HijackAnalyzer$$anon$1.scala$tools$nsc$typechecker$Macros$_setter_$scala$tools$nsc$typechecker$Macros$$macroClassLoadersCache_$eq(Lscala/tools/nsc/classpath/FileBasedCache;)V is abstract
akka.actor.ActorInitializationException: akka://ENSIME/user/ensime-main/project/scalac/root_compile: exception during creation
	at akka.actor.ActorInitializationException$.apply(Actor.scala:193)
	at akka.actor.ActorCell.create(ActorCell.scala:671)
	at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:525)
	at akka.actor.ActorCell.systemInvoke(ActorCell.scala:547)
	at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:282)
	at akka.dispatch.Mailbox.run(Mailbox.scala:223)
	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
	at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)

TimWSpence

# Loosely based on https://www.fpcomplete.com/blog/2017/12/building-haskell-apps-with-docker
FROM fpco/stack-build:lts-13.27 as build
RUN mkdir /opt/build
WORKDIR /opt/build

 # GHC dynamically links its compilation targets to lib gmp
RUN apt-get update \
  && apt-get download libgmp10
RUN mv libgmp*.deb libgmp.deb

TimWSpence

docker pull ns/app-dependencies:latest || true

docker build --target dependencies --cache-from ns/app-dependencies:latest -t ns/app-dependencies .

docker build --target app --cache-from ns/app-dependencies:latest -t ns/app .

docker push ns/app-dependencies:latest
docker push ns/app:latest

TimWSpence

# Loosely based on https://www.fpcomplete.com/blog/2017/12/building-haskell-apps-with-docker
FROM fpco/stack-build:lts-13.27 as dependencies
RUN mkdir /opt/build
WORKDIR /opt/build

# GHC dynamically links its compilation targets to lib gmp
RUN apt-get update \
  && apt-get download libgmp10
RUN mv libgmp*.deb libgmp.deb

TimWSpence

def map[A, B](s: STM[A], f: A => B): STM[B]
def orElse[A](attempt: STM[A], fallback: STM[A]): STM[A]
def check(check: => Boolean): STM[Unit]

TimWSpence

def get: STM[A]
def set(a: A): STM[Unit]
def modify(f: A => A): STM[Unit]

TimWSpence

def atomically[F[_], A](s: STM[A]): F[A]

TimWSpence

import cats.effect.{ExitCode, IO, IOApp}
import io.github.timwspence.cats.stm.{TVar, STM}
import scala.concurrent.duration._

object Main extends IOApp {

  override def run(args: List[String]): IO[ExitCode] =
    for {
      accountForTim   <- TVar.of[Long](100).commit[IO]

TimWSpence

import cats.implicits._
import cats.effect.{Blocker, IO, IOApp, ExitCode}
import java.util.concurrent.Executors

object Test extends IOApp {
  override def run(args: List[String]): IO[ExitCode] = {
    val blocker = Blocker.liftExecutorService(Executors.newCachedThreadPool())
    blocker.blockOn(
      for {
        _ <- printThread