source: Jenkins/TestRegen @ 10dafa4

#!groovy

node ('master') {

        user_email = ''
        test_list = ''

        prepare_build()

        try {

                stage('Checkout') {
                        checkout scm

                        sh 'git clean -xdf'

                        sh 'git reset --hard'
                }

                stage('Building x86') {
                        regen_tests('i386')
                }

                stage('Building x64') {
                        regen_tests('x86_64')
                }

                stage('Patching') {
                        make_patch()
                }

                stage('Email') {
                        email()
                }
        }
        catch (Exception caughtError) {
                email_error()

                throw caughtError
        }
}

def prepare_build() {
        properties ([                                                                                                   \
                [$class: 'ParametersDefinitionProperty',                                                                \
                        parameterDefinitions: [                                                                         \
                                [$class: 'StringParameterDefinition',                                           \
                                        description: 'Who required the test',                                   \
                                        name: 'pEmail',                                                                 \
                                ],                                                                                              \
                                [$class: 'StringParameterDefinition',                                           \
                                        description: 'Space separated list of tests to run',                    \
                                        name: 'pTests',                                                                 \
                                ],                                                                                              \
                        ],
                ]])

        user_email = pEmail;
        test_list  = pTests;

        echo "User ${user_email} requested regenerating tests : ${ test_list }"
}

def regen_tests( String arch ) {

        def install_dir = pwd tmp: true

        //Configure the conpilation (Output is not relevant)
        //Use the current directory as the installation target so nothing
        //escapes the sandbox
        //Also specify the compiler by hand
        sh "./configure CXX=clang++ CC=gcc-6 --host=${arch} --enable-silent-rules --quiet"

        //Compile the project
        sh 'make -j 8 --no-print-directory'

        //Regenerate the desired tests
        sh "src/tests/test.py --regenerate-expected ${test_list}"

        //Clean everything from the last build
        sh 'make maintainer-clean > /dev/null'
}

def make_patch() {

        def target_dir = pwd tmp: true

        //Add every file so new files appear in the diff
        sh 'git add .'

        //Create a patch file
        sh "git diff --cached --binary > ${target_dir}/result.patch"
}

def email() {

        def target_dir = pwd tmp: true

        dir( target_dir ) {

                def email_subject = "[cforall dashboard][TEST REGEN# ${env.BUILD_NUMBER}] - Result"
                def email_body = """This is an automated email from the Jenkins build machine. It was
generated https://cforall.uwaterloo.ca:8082/dashboard.html.

Please apply the required changes using the following method :
    - copy result.patch to your cforall repository of choice.
    - call 'git apply [patch file name]' (WARNING: the changes may conflict with any current changes to the test expected results).
    - validate that the changes are correct.
    - commit the changes as usual."""

                //send email notification
                emailext body: email_body, subject: email_subject, to: user_email, attachmentsPattern: "**/*.patch"
        }
}

def email_error() {

        def email_subject = "[cforall dashboard][TEST REGEN# ${env.BUILD_NUMBER}] - FAILURE"
        def email_body = """This is an automated email from the Jenkins build machine. It was
generated https://cforall.uwaterloo.ca:8082/dashboard.html.

Test generation encoutered an error please see attached logs

-----------------------------------------------------------------------"""

        //send email notification
        emailext body: email_body, subject: email_subject, to: user_email, attachLog: true
}