publish multiple coverage reports to one

coverage-reports-jenkinsfile.groovy

node('master') {
    stage('Publish coverage reports') {
        def pathPattern = ['/target/jacoco/index.html']
        pathPattern.each { pattern ->
            def modules = ['module1',
                           'module2',
                           'module3']
            allPaths = []
            allModules = []
            modules.each { module ->
                singleModulePath = module + pattern
                allPaths.push(singleModulePath)
                allModules.push(module)
            }
            reportPath = allPaths.join(',')
            moduleTitles = allModules.join(',')
	    }
        try {
            publishHTML (target: [
                allowMissing: false,
                alwaysLinkToLastBuild: true,
                keepAll: true,
                reportDir: '.',
                reportFiles: "${reportPath}",
                reportTitles: "${moduleTitles}",
                reportName: "Coverage Report"
                ])
            currentBuild.result = 'SUCCESS'
            } 
        catch (exc) {
            echo "Failed to publish coverage report! ${exc}"
            currentBuild.result = 'FAILURE'
        }
    }
}

coverage-reports-jenkinsfile2.groovy

stage('publish reports') {
        steps {
            unstash 'source'

            script {
                sh 'rm -f listFiles.txt'
                sh 'ls target/jmeter/reports > listFiles.txt'
                def baseDir = ['target/jmeter/reports/']
                baseDir.each { base ->
                    allPaths = []
                    allFiles = []
                    def files = readFile("listFiles.txt").split("\\r?\\n");
                    files.each { file ->
                        singleDirPath = base + file
                        allPaths.push(singleModulePath)
                        allFiles.push(file)
                    }
                    reportPath = allPaths.join(',')
                    reportTitles = allFiles.join(',')
                }
                
                publishHTML target: [
                    allowMissing: false,
                    alwaysLinkToLastBuild: false,
                    keepAll: true,
                    reportDir: '.',
                    reportFiles: "${reportPath}",
                    reportFiles: "${reportTitles}",
                    reportName: "Coverage Report"
                ]                   
            }           
        }
    }