CODEWITHSUNDEEP
scalacommandsbt
Joel
Joel

Reputation: 689

Defining multiple run commands with sbt

I am using sbt 0.13.5. I have several sub projects in my project, in particular a spray client and a spray route server. I want to be able to define several "run" commands, like runClient and runServer. for each sub project, I create a mainClass and set it up in the sbt file. Now, I would like to be able to: - launch several sbt in different terminal sessions. - in one session, type runClient - in the other session, type runServer. Is there a proper way to do that in sbt? I tried to define runServer as a new command:

def runServer = Command.command("runServer") { state =>
    println("run Server")
    run in Compile in server
    state
}

def runClient = Command.command("runClient") { state =>
    println("run Client")
    run in Compile in client
    state
}

where server is my server project. I add runServer in the commands of the project :

lazy val root = Project(id = "myproject", base = file("."),
    settings = commands ++= Seq(runServer, runClient)
).aggregate(client, server)

In sbt, if I type runServer, the println works, but nothing is launched. Do you know how to execute the "run" statement?

Thanks.

Upvotes: 2

Views: 1763

Answers (1)

lpiepiora
lpiepiora

Reputation: 13749

I don't think you have to resort to commands to achieve what are you looking for. Simple tasks should be enough.

There is a caveat though. The run task, is an input task, and you have to convert it to normal task before referencing it.

build.sbt

val client, server = project

val runServer = taskKey[Unit]("Runs server")

val runClient = taskKey[Unit]("Runs client")

runClient := (run in Compile in client).toTask("args to the main class").value

runServer := (run in Compile in server).toTask("args to the main class").value

Now you should be able to run your server using runServer and client using runClient.

Note also that you can run both commands using server/run and client/run without resorting to custom tasks or commands.

Upvotes: 1

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