Jacoco | Gradle | Exclude from aggregated modules - gradle

Question

I have a Java-Gradle project that has multiple modules, meaning multiple build.gradle files and multiple test folders.
I have a main build.gralde and I succeeded to aggregate all the multi jacoco reports to one main report using the configuration below at my main build.gradle.
but now I want to exclude some of packages / classes from the aggregated modules.
How do I do that?
you can see also my tries below
apply plugin: 'jacoco'
apply plugin: 'java'
def otherProjects = [':module1', ':module2']
otherProjects.each {
// ensure other projects evaluated first so sourceSets are configured
evaluationDependsOn it
}
jacoco {
toolVersion = "0.8.4"
reportsDir = file("$buildDir/jacoco")
}
jacocoTestReport {
FileTree sourceTree = files().asFileTree
FileTree classTree = files().asFileTree
otherProjects.each {
sourceTree += project(it).sourceSets.main.allJava
classTree += project(it).sourceSets.main.output.asFileTree
}
additionalSourceDirs = sourceTree
additionalClassDirs = classTree
reports {
html.enabled true
html.destination file("${buildDir}/jacocoHtml")
}
// try 1
afterEvaluate {
classDirectories = files(classDirectories.files.collect {
fileTree(dir: it, exclude: '/com/packege_from_module1/**')
})
}
// try 2
afterEvaluate {
additionalSourceDirs = files(additionalSourceDirs.files.collect {
sourceTree(dir: it, exclude: 'com/packege_from__module1/**')
})
}
// try 3
afterEvaluate {
additionalSourceDirs = files(additionalSourceDirs.files.collect {
classTree(dir: it, exclude: 'com/packege_from__module1/**')
})
}
}

Answer 1

Given
a/src/main/java/A.java
class A {
}
a/src/test/java/ATest.java
import org.junit.Test;
public class ATest {
#Test
public void a() {
}
}
b/src/main/java/B.java
class B {
}
b/src/test/java/BTest.java
import org.junit.Test;
public class BTest {
#Test
public void b() {
}
}
settings.gradle
rootProject.name = 'example'
include 'a'
include 'b'
and build.gradle
allprojects {
apply plugin: 'java'
apply plugin: 'jacoco'
jacoco {
toolVersion = "0.8.3"
}
repositories {
mavenCentral()
}
dependencies {
testCompile 'junit:junit:4.12'
}
}
task jacocoAggregateReport(type: org.gradle.testing.jacoco.tasks.JacocoReport) {
dependsOn = subprojects.test
sourceDirectories = files(subprojects.sourceSets.main.allSource.srcDirs)
classDirectories = files(subprojects.sourceSets.main.output)
executionData = files(subprojects.jacocoTestReport.executionData)
}
using Gradle 4.10.3 or 5.4.1 execution of gradle jacocoAggregateReport will produce following report in directory build/reports/jacoco/jacocoAggregateReport/html/index.html
Now let's exclude class file A.class from report by changing
classDirectories = files(subprojects.sourceSets.main.output)
in build.gradle on
classDirectories = files(subprojects.sourceSets.main.output).asFileTree.matching {
exclude 'A.class'
}
and execution of gradle jacocoAggregateReport will produce
Your attempts did not worked, because report is constructed for all class files from both classDirectories and additionalClassDirs - no exclusion from classDirectories and additionalClassDirs in attempts 2 and 3, no exclusion from additionalClassDirs in attempt 1.