unix listen sockets are not working

[nolange]

kroki implements Unix sockets as requested per #1329.

But apparently there is still some support missing,from my understanding some other part of the code still expects a TCP Connection.

Easy to reproduce:

podman run \
        --rm \
        --replace \
        --name kroki-base \
        -e KROKI_LISTEN=unix:///run/www.sock \
        --image-volume=tmpfs \
        docker.io/yuzutech/kroki

Result:

{
  "timestamp": "1681209620341",
  "level": "ERROR",
  "thread": "vert.x-eventloop-thread-0",
  "logger": "io.vertx.core.impl.launcher.commands.VertxIsolatedDeployer",
  "message": "Failed in deploying verticle",
  "context": "default",
  "exception": "java.lang.IllegalArgumentException: null
 at io.vertx.core.net.impl.transport.Transport.serverChannelFactory(Transport.java:194)
 at io.vertx.core.net.impl.AsyncResolveConnectHelper.doBind(AsyncResolveConnectHelper.java:37)
 at io.vertx.core.net.impl.TCPServerBase.lambda$listen$2(TCPServerBase.java:168)
 at io.vertx.core.impl.future.FutureImpl$3.onSuccess(FutureImpl.java:141)
 at io.vertx.core.impl.future.FutureBase.emitSuccess(FutureBase.java:60)
 at io.vertx.core.impl.future.FutureImpl.addListener(FutureImpl.java:196)
 at io.vertx.core.impl.future.PromiseImpl.addListener(PromiseImpl.java:23)
 at io.vertx.core.impl.future.FutureImpl.onComplete(FutureImpl.java:164)
 at io.vertx.core.impl.future.PromiseImpl.onComplete(PromiseImpl.java:23)
 at io.vertx.core.net.impl.TCPServerBase.listen(TCPServerBase.java:151)
 at io.vertx.core.net.impl.TCPServerBase.bind(TCPServerBase.java:94)
 at io.vertx.core.http.impl.HttpServerImpl.listen(HttpServerImpl.java:215)
 at io.vertx.core.http.impl.HttpServerImpl.listen(HttpServerImpl.java:228)
 at io.kroki.server.Server.start(Server.java:164)
 at io.kroki.server.Server.lambda$start$1(Server.java:70)
 at io.vertx.core.impl.future.FutureImpl$3.onSuccess(FutureImpl.java:141)
 at io.vertx.core.impl.future.FutureBase.emitSuccess(FutureBase.java:60)
 at io.vertx.core.impl.future.FutureImpl.addListener(FutureImpl.java:196)
 at io.vertx.core.impl.future.FutureImpl.onComplete(FutureImpl.java:164)
 at io.vertx.config.impl.ConfigRetrieverImpl.getConfig(ConfigRetrieverImpl.java:175)
 at io.kroki.server.Server.start(Server.java:66)
 at io.vertx.core.impl.DeploymentManager.lambda$doDeploy$5(DeploymentManager.java:196)
 at io.vertx.core.impl.ContextInternal.dispatch(ContextInternal.java:264)
 at io.vertx.core.impl.ContextInternal.dispatch(ContextInternal.java:246)
 at io.vertx.core.impl.EventLoopContext.lambda$runOnContext$0(EventLoopContext.java:43)
 at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174)
 at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167)
 at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
 at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:569)
 at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
 at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
 at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
 at java.base/java.lang.Thread.run(Unknown Source)
"
}

[ggrossetie]

I believe this is a duplicate of #1441