Does anyone know how you could go about keeping the run task kotlinlang #gradle

Does anyone know how you could go about keeping th...

gotoOla

01/14/2019, 8:09 AM

Does anyone know how you could go about keeping the run task without using the application plugin and still having the hot reload? The reason why I want to get rid of the application plugin is because it has a lot of the distribution tasks and we are packaging it with the shadow plugin

Nikky

01/14/2019, 11:35 PM

so why get rid of it ? using application plugin and shadowJar together works fine and sets up the manifest for you.. whats so bad about that ?

Nikky

01/14/2019, 11:37 PM

i am not sure there is a

JavaExec

task available without the application plugin and you will have to deal with setting up the arguments and possibly classpath as well.. depending on the complexity of your project

gildor

01/15/2019, 12:59 AM

Shadow jar has great support of application plugin and provide shadow versions of all application plugin tasks, so I see no reason to get rid of application plugin

DALDEI

01/15/2019, 6:42 AM

Curious (for own use) which shadow jar plugin are you using ?

gildor

01/15/2019, 6:53 AM

https://github.com/johnrengelman/shadow/

gotoOla

01/15/2019, 2:21 PM

The reason why I want to get away from the application plugin is because it comes with a lot of unecessary tasks for our use case (especially the distribution plugin which is transitive). So if the only thing that we are using from the application plugin is the run task it felt a bit like bringing in a tank to deliver a small package 😛

gotoOla

01/15/2019, 2:22 PM

@DALDEI I have been using both version 2.x.x of the shadow plugin (I think this is the one in the ktor documentation) and 4.x.x and I haven’t experienced any problems with either of them

gotoOla

01/15/2019, 2:25 PM

but I think I got it to work with

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task run(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = mainClassName
}

gildor

01/15/2019, 2:40 PM

Shadow also uses application plugin, so you cannot get rid of it without reimplementing everything yourself. I still don't see any reason. If those tasks are really bothering you, you can disable them and use only shadow versions

gildor

01/15/2019, 2:41 PM

Also application plugin already bundled with Gradle and uses lazy task resolution, so you pay nothing for application plugin

gotoOla

01/15/2019, 4:33 PM

@gildor ah cool I didn’t know that. So just bringing in the shadow-plugin will give you the distTar and distZip tasks? Then I agree, it sounds more and more like there’s no real use case for it

gotoOla

01/15/2019, 4:35 PM

Would be interesting to know how that works because if I run (without the application plugin)

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./gradlew build -m
:discoverMainScriptsExtensions SKIPPED
:compileKotlin SKIPPED
:compileJava SKIPPED
:processResources SKIPPED
:classes SKIPPED
:inspectClassesForKotlinIC SKIPPED
:jar SKIPPED
:assemble SKIPPED
:discoverTestScriptsExtensions SKIPPED
:compileTestKotlin SKIPPED
:compileTestJava SKIPPED
:processTestResources SKIPPED
:testClasses SKIPPED
:test SKIPPED
:check SKIPPED
:shadowJar SKIPPED
:build SKIPPED

whilest with the application plugin I see shadowDistZip and all of the distribution tasks (distZip, distTar etc)

gotoOla

01/15/2019, 4:36 PM

(but with these plugins/plugin setup)

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apply plugin: 'com.github.johnrengelman.shadow'
apply plugin: 'java'
apply plugin: 'kotlin'

tasks.build.dependsOn tasks.shadowJar

gildor

01/15/2019, 4:39 PM

Because this config builds and jar and shadowJar, which probably not what you want

gotoOla

01/15/2019, 4:42 PM

So what I try right now is that I do this and then I have a dockerfile which pretty much does

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ADD ./build/libs/app.jar app.jar

or would I miss out on anything from the application plugin by doing this?

gotoOla

01/15/2019, 4:47 PM

(I should probably also say that this does not get published as any kind of maven artifact. The end result is a versioned docker image)

gildor

01/15/2019, 4:48 PM

Application plugin just allows to create jar file with correct meta to make jar executable

gildor

01/15/2019, 4:49 PM

You apply application plugin and shadow plugin, then build shadow jar which will contain all the dependencies and correct meta-inf so jar will be executable

gildor

01/15/2019, 4:50 PM

Task

build

already depends on

jar

task, if you don't need common (non fat) jar, just disable this task

gildor

01/15/2019, 4:51 PM

Or just run shadowJar and only shadow jar will be created (by default it has name with version and classifier

all

, but this is configurable)

gildor

01/15/2019, 4:53 PM

Such jar (with all dependencies and application plugin) can be executed like this:

java -jar your-app.jar

gildor

01/15/2019, 4:53 PM

Without application plugin it will not work

gotoOla

01/15/2019, 5:18 PM

What do you mean by that it will not work at all? Not starting at all or will the manifest file be wrong?

gotoOla

01/15/2019, 5:19 PM

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apply plugin: 'com.github.johnrengelman.shadow'
apply plugin: 'java'
apply plugin: 'kotlin'

tasks.build.dependsOn tasks.shadowJar
def appName="app"
mainClassName="my.example.AppKt"

shadowJar {
    baseName = appName
    classifier = null
    version = null
    manifest {
        attributes 'Main-Class': mainClassName
    }
}

becuase with this I am able to do

java -jar

on the produced “app.jar”

gotoOla

01/15/2019, 5:19 PM

(just trying to undertstand btw, I realise it might be a bit frustrating with all of these stupid questions)

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