How to include all files from jar into war using Gradle - gradle

Question

I was trying plugins:
io.freefair.war-overlay - but it just overlay one war to another,
waroverlay - it has appropriate option "includeWarJars true" but it
does't works for me.
Currently I'm trying write script:
dependencies {
/* jar, his files I would like to include in war */
compile project(':my_jar_1')
}
war {
/* Step 1. Copy all from my_jar_1 into WEB-INF/classes */
into('WEB-INF/classes') {
from configurations.compile
.filter { it.name.startsWith("my_jar_1") }
.collect { zipTree(it).matching { exclude 'META-INF/**/*.*' }}
}
/* Step 2. Deleting jar from war WEB-INF/lib. I got stuck here. It println, but doesn't delete jar */
doLast {
zipTree('build/libs/war_1-0.0.0.war').files.each {
if (it.path.endsWith('.jar')) {
delete it
println 'DELETED ' + it.path
}
}
}
}
Could somebody tell me how to make it work?
Or maybe smb know more elegant solution?
Also I was trying to declare my own configuration
configurations { overlay }
dependencies {
overlay project(':my_jar_1')
}
war {
into('WEB-INF/classes') {
from configurations.overlay
...
But it shows error
FAILURE: Build failed with an exception.
What went wrong: Failed to capture snapshot of input files for task 'war' property 'rootSpec$1$1' during up-to-date check.
Failed to create MD5 hash for file '/home/user/projects/OveralJarToWar/my_jar_1/build/libs/my_jar_1-1.0-SNAPSHOT.jar'.

Answer 1

The content of WEB-INF/lib and WEB-INF/classes is configured by single property classpath of war task. According to documentation:
Any JAR or ZIP files in this classpath are included in the WEB-INF/lib directory. Any directories in this classpath are included in the WEB-INF/classes directory
So, in your case, the classpath should be modified as follow
war {
def myJar = project(':my_jar_1').jar.outputs
def myClassesAndResources = project(':my_jar_1').sourceSets.main.output
classpath = classpath - myJar + myClassesAndResources
}