This should work right? `./gradlew -Dio.ktor.development=true run` with this Gradle application conf...

# ktor

[Arjan van Wieringen]

This should work right? ./gradlew -Dio.ktor.development=true run with this Gradle application configuration:

application {
    mainClass.set("nl.helicotech.app.AppKt")
}

Because I am getting the following:
[main] INFO ktor.application - Autoreload is disabled because the development mode is off.

But this works:

application {
    mainClass.set("nl.helicotech.app.AppKt")
    applicationDefaultJvmArgs = listOf("-Dio.ktor.development=true")
}

[Arjan van Wieringen]

Via the IntelliJ Run Configuration is also not working

[Arjan van Wieringen]

Following the gettings tarted guide and creating a new Ktor project in IntelliJ it also doesn't work.

So either I am dumb and missing something completely obvious or something is wrong 😉

[Arjan van Wieringen]

I figured it out... I am dumb, as expected. In the docs it states:
If you run your application using a Gradle task, you can pass io.ktor.development to the applicationDefaultJvmArgs property in a *build.gradle(.kts)* file.

[Arjan van Wieringen]

However, I still don’t know why I can’t get it to work when I don’t run it via a Gradle task

[Aleksei Tirman [JB]]

As far as I understand, the VM options cannot be directly passed to the application via CLI while using the run task. You can define a property that could determine if the development mode is on:

application {
    // ... 
    if (hasProperty("dev")) {
        applicationDefaultJvmArgs = listOf("-Dio.ktor.development=true")
    }
}

The usage:

./gradlew run -Pdev