Running Gradle ShadowJar Plugin only on specific subproject - groovy

Question

Please note: Even though my myapp-server is a DropWizard app, this is strictly a Gradle question; I only mention DropWizard for good measure.
I have a multi-project build that I am building with Gradle:
myapp/
myapp-client/
myapp-shared/
myapp-server/
build.gradle
settings.gradle
Where settings.gradle looks like:
include ':myapp-shared'
include ':myapp-client'
include ':myapp-server'
I have successfully got Gradle to compile my Groovy source code, run unit tests, generate GroovyDocs, and package both binary and source JARs for all 3 subprojects. The build invocation for which is: gradle clean build groovydoc sourcesJar -Pversion=<whatever version I specify>.
The myapp-server is actually a project that I need to run the Shadow JAR plugin on, which is usually executed via gradle clean build shadowJar.
Here is my myapp-server/build.gradle:
import com.github.jengelman.gradle.plugins.shadow.transformers.ServiceFileTransformer
apply plugin: 'application'
apply plugin: 'shadow'
mainClassName = 'com.me.myapp.server.MyAppServer'
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.github.jengelman.gradle.plugins:shadow:0.8'
}
}
dependencies {
compile project(':myapp-shared')
compile (
'io.dropwizard:dropwizard-core:0.7.1'
)
}
shadow {
outputFile new File(destinationDir, "${outputJarBaseName}.${extension}")
transformer(ServiceFileTransformer)
exclude 'META-INF/*.DSA'
exclude 'META-INF/*.RSA'
}
jar {
manifest {
attributes 'Main-Class': mainClassName
}
}
run {
args 'server', 'config.json'
if (System.getProperty('debug', 'false') == 'true') {
jvmArgs '-Xdebug', '-Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5005'
}
}
artifacts {
shadowJar
}
My question: How do I configure Gradle to only run the shadowJar task on my myapp-server subproject, and not on any of the others? Ideally, I could just have my build invocation be something like:
gradle clean build groovyDoc sourceJar shadowJar -Pversion=<blah>
And then somehow configure Gradle to ignore running shadowJar on everything except myapp-server. Ideas?
Update
When I run gradle clean build groovyDoc sourceJar shadowJar -Pversion=0.1.3 I see a bunch of Gradle output that ends with:
:myapp-shared:groovydoc
:myapp-client:sourcesJar
:myapp-server:sourcesJar
:myapp-shared:sourcesJar
:myapp-server:copySignedLibs UP-TO-DATE
:myapp-server:shadowJar
BUILD SUCCESSFUL
Total time: 16.315 secs
However when I drill down into myapp-server/build/libs/myapp-server-0.1.3.jar and open it (extracting it like a ZIP), I only see my compiled classes inside of it, not all the classes from all of its dependent JARs (it should be a "Fat JAR"). For instance, myapp-server depends on DropWizard. All the DropWizard classes should be inside this JAR. All of DropWizard's transitive dependencies should have class files inside this JAR, etc.

Answer 1

I've just checked out the project located here.
After fetching the sources I've run: gradle clean shadowJar in myapp directory. As far as I see, there is a jar file created under myapp/myapp-server/build/distributions that seesm to be the fat jar You're looking for (also when file size is taken into consideration). After entering the mentioned distributions directory and running java -jar myapp-server.jar the server is started. It seems that it's all working fine. Am I right?
Also running curl -v -X GET http://localhost:8080/myapp/dosomething gives the following output:
* Hostname was NOT found in DNS cache
* Trying ::1...
* Connected to localhost (::1) port 8080 (#0)
> GET /myapp/dosomething HTTP/1.1
> User-Agent: curl/7.37.1
> Host: localhost:8080
> Accept: */*
>
< HTTP/1.1 200 OK
< Date: Mon, 05 Jan 2015 14:59:50 GMT
< Content-Type: application/json
< Content-Length: 0
<
* Connection #0 to host localhost left intact

Answer 2

If you were looking to only reference one sub project to shadowJar you could do it as follows.
gradle clean build groovyDoc sourceJar :myapp-server:shadowJar -Pversion=<1.0>
You can drill down to your subprojects tasks via :<project name>:<task name>
Reference:
https://gradle.org/docs/current/userguide/multi_project_builds.html
57.4. Running tasks by their absolute path