#!/usr/bin/env groovy

def call() {
    echo 'Checking c++ tidy output'
    def tidyStages
    def success = true
    sh "mkdir ${WORKSPACE}/tidyLogs"
    tidyStages = prepTidyStages()
    parallel(tidyStages)
    def tidyLogs = sh (script: "find ${WORKSPACE}tidyLogs -type f -size +1", returnStdout: true).split()
    for (tLog in tidylogs) {
            sh (script: "cat ${WORKSPACE}/tidyLogs\u002F\u0024${tLog} >> ${WORKSPACE}/clang-tidy.log")
            success = false
        } else {
            sh "rm ${WORKSPACE}/tidyLogs/${tLog}"
        }
    }
    if (success) {
    } else {
        recordIssues qualityGates: [[threshold: 1, type: 'TOTAL', unstable: true]], tools: [clangTidy(pattern: 'clang-tidy.log')]
        archiveArtifacts "${WORKSPACE}/tidyLogs/*.log"
        error('Failed clang-tidy')
    }
}

def prepTidyStages() {
    def tidyStages = [:]
    // Get a list of changes based on master branch
    def fileList = sh(script: 'git diff-tree --no-commit-id --diff-filter=d --name-only -r `git merge-base refs/remotes/origin/master HEAD` HEAD',
            returnStdout: true).split()
    for (chgFile in fileList) {
        fileName = sh(script: "basename ${chgFile}", returnStdout: true).trim()
        filePath = sh(script: "realpath ${chgFile}", returnStdout: true).trim()
        tidyStages.put(fileName, prepOneTidyStage(fileName, filePath))
    }
    return tidyStages
}

def prepOneTidyStage(String fName, String fPath) {
    return {
        sh "clang-tidy -p ${WORKSPACE}/build ${fPath} | tee ${WORKSPACE}/tidyLogs/${fName}.log"
    }
}



Output:
ERROR: Failed cppTidy
org.jenkinsci.plugins.workflow.cps.CpsCompilationErrorsException: startup failed:
/var/jenkins_home/jobs/test-parallel/builds/73/libs/Megh_Pipes/vars/cppTidy.groovy: 15: expecting '}', found 'else' @ line 15, column 11.
           } else {
             ^

1 error

	at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:310)
	at org.codehaus.groovy.control.ErrorCollector.addFatalError(ErrorCollector.java:150)
	at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:120)
	at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:132)
.
.
.
.
.
(30 lines of Java crash dumps are useless here)