Add support for property editing

[checkcast]

It would be nice to be able to set server.properties values in the runServer block, like online-mode, server port or name (which could be defaulted to something like '${project.name} test server').

[ryantheleach]

I've currently been trying and failing to create a gradle task that creates a partial server.properties before RunServer runs.

    register<WriteProperties>("writeProperties") {
        tasks.withType<RunServer> {
            dependsOn(this@register)
        }

        destinationFile = runServer.runDirectory.file("server.properties")
        encoding = "UTF-8"
        property("online-mode", false)
        property("gamemode", 1)
        property("motd", "debug server")
        property("enable-command-block", true)
    }

Would appreciate any advice.

[ryantheleach]

I nearly gave up, but managed to get it to work.

register is config avoidant, where as create will run the configuration.

    create<WriteProperties>("writeProperties") {
        runServer.configure {
            dependsOn(this@create)
            this@create.destinationFile.set(runDirectory.file("server.properties"))
        }

        encoding = "UTF-8"
        //property("online-mode", false)
        property("gamemode", 1)
        property("motd", "debug server")
        property("enable-command-block", true)
    }