.gitlab-ci.yml

test:
  stage: test
  script:
    - ./gradlew test jacocoTestReport
  tags:
    - docker-L
  artifacts:
    paths:
      - shared/build/reports/jacoco.xml

coverage:
  stage: visualize
  image: registry.gitlab.com/haynes/jacoco2cobertura:1.0.7
  script:
    # convert report from jacoco to cobertura, using relative project path
    - python /opt/cover2cover.py shared/build/reports/jacoco.xml $CI_PROJECT_DIR/shared/commonMain/kotlin >build/cobertura.xml
  needs: [ "test" ]
  artifacts:
    reports:
      coverage_report:
        coverage_format: cobertura
        path: build/cobertura.xml

build.gradle.kts

tasks.register<JacocoReport>("jacocoTestReport") {
    group = "Reporting"
    description = "Generate Jacoco coverage reports after running tests."

    classDirectories.setFrom(fileTree("${buildDir}/tmp/kotlin-classes/debug") {
        setIncludes(setOf("**/**/*.class", "**/**/*.class"))
    })
    sourceDirectories.setFrom(files(arrayOf("src/commonMain", "src/androidMain")))
    executionData.setFrom(fileTree(project.projectDir) {
        setIncludes(setOf("**/**/*.exec", "**/**/*.ec"))
    })

    reports {
        xml.required.set(true)
        html.required.set(true)

        xml.outputLocation.set(file("${buildDir}/reports/jacoco.xml"))
        html.outputLocation.set(file("${buildDir}/reports/jacoco"))
    }

}