source: Jenkinsfile @ a933dcf4

#!groovy

//===========================================================================================================
// Main loop of the compilation
//===========================================================================================================
node ('master'){

        boolean bIsSandbox = env.BRANCH_NAME == "jenkins-sandbox"
        def err = null
        def log_needed = false

        stage_name              = ''

        compiler                = null
        arch_name               = ''
        architecture    = ''
        
        do_alltests             = false
        do_benchmark    = false
        do_doc          = false
        do_publish              = false
        do_sendemail    = true

        currentBuild.result = "SUCCESS"

        try {
                //Wrap build to add timestamp to command line
                wrap([$class: 'TimestamperBuildWrapper']) {

                        //Prevent the build from exceeding 60 minutes
                        timeout(60) {

                                notify_server()

                                prepare_build()

                                checkout()

                                build()

                                test()

                                benchmark()

                                clean()

                                build_doc()

                                publish()

                                notify_server()
                        }
                }
        }

        //If an exception is caught we need to change the status and remember to
        //attach the build log to the email
        catch (Exception caughtError) {
                //rethrow error later
                err = caughtError

                //An error has occured, the build log is relevent
                log_needed = true

                //Store the result of the build log
                currentBuild.result = "${stage_name} FAILURE".trim()
        }

        finally {
                //Send email with final results if this is not a full build
                if( do_sendemail && !bIsSandbox ) {
                        echo 'Notifying users of result'
                        email(currentBuild.result, log_needed)
                }

                echo 'Build Completed'

                /* Must re-throw exception to propagate error */
                if (err) {
                        throw err
                }
        }
}

//===========================================================================================================
// Helper classes/variables/routines
//===========================================================================================================
//Helper routine to collect information about the git history
def collect_git_info() {

        //create the temporary output directory in case it doesn't already exist
        def out_dir = pwd tmp: true
        sh "mkdir -p ${out_dir}"

        //parse git logs to find what changed
        gitRefName = env.BRANCH_NAME
        dir("../${gitRefName}@script") {
                sh "git reflog > ${out_dir}/GIT_COMMIT"
        }
        git_reflog = readFile("${out_dir}/GIT_COMMIT")
        gitRefOldValue = (git_reflog =~ /moving from (.+) to (.+)/)[0][1]
        gitRefNewValue = (git_reflog =~ /moving from (.+) to (.+)/)[0][2]
}

def prepare_build() {
        properties ([                                                                                                   \
                [$class: 'ParametersDefinitionProperty',                                                                \
                        parameterDefinitions: [                                                                         \
                                [$class: 'ChoiceParameterDefinition',                                           \
                                        description: 'Which compiler to use',                                   \
                                        name: 'pCompiler',                                                              \
                                        choices: 'gcc-6\ngcc-5\ngcc-4.9\nclang',                                        \
                                        defaultValue: 'gcc-6',                                                          \
                                ],                                                                                              \
                                [$class: 'ChoiceParameterDefinition',                                           \
                                        description: 'The target architecture',                                 \
                                        name: 'pArchitecture',                                                          \
                                        choices: 'x64\nx86',                                                            \
                                        defaultValue: 'x64',                                                            \
                                ],                                                                                              \
                                [$class: 'BooleanParameterDefinition',                                                  \
                                        description: 'If false, only the quick test suite is ran',              \
                                        name: 'pRunAllTests',                                                           \
                                        defaultValue: false,                                                            \
                                ],                                                                                              \
                                [$class: 'BooleanParameterDefinition',                                                  \
                                        description: 'If true, jenkins also runs benchmarks',           \
                                        name: 'pRunBenchmark',                                                          \
                                        defaultValue: true,                                                             \
                                ],                                                                                              \
                                [$class: 'BooleanParameterDefinition',                                                  \
                                        description: 'If true, jenkins also builds documentation',              \
                                        name: 'pBuildDocumentation',                                                    \
                                        defaultValue: true,                                                             \
                                ],                                                                                              \
                                [$class: 'BooleanParameterDefinition',                                                  \
                                        description: 'If true, jenkins also publishes results',                 \
                                        name: 'pPublish',                                                               \
                                        defaultValue: false,                                                            \
                                ],                                                                                              \
                                [$class: 'BooleanParameterDefinition',                                                  \
                                        description: 'If true, jenkins will not send emails',           \
                                        name: 'pSilent',                                                                        \
                                        defaultValue: false,                                                            \
                                ],                                                                                              \
                        ],
                ]])

        compiler                = compiler_from_params( pCompiler )
        arch_name               = pArchitecture
        architecture    = architecture_from_params( arch_name )

        do_alltests             = (pRunAllTests == 'true')
        do_benchmark    = (pRunBenchmark == 'true')
        do_doc          = (pBuildDocumentation == 'true')
        do_publish              = (pPublish == 'true')
        do_sendemail    = ! (pSilent == 'true')

        echo """Compiler                : ${compiler.cc_name} (${compiler.cpp_cc}/${compiler.cfa_cc})
Architecture            : ${arch_name}
Arc Flags               : ${architecture}
Run All Tests           : ${ pRunAllTests.toString() }
Run Benchmark           : ${ pRunBenchmark.toString() }
Build Documentation     : ${ pBuildDocumentation.toString() }
Publish         : ${ pPublish.toString() }
Silent                  : ${ pSilent.toString() }
"""

        collect_git_info()
}

def build_stage(String name) {
        stage_name = name
        stage name
}

def notify_server() {
        sh 'curl --silent -X POST http://plg2:8082/jenkins/notify > /dev/null || true'
        return
}

def make_doc() {
        def err = null
        try {
                sh 'make clean > /dev/null'
                sh 'make > /dev/null 2>&1'
        } 
        catch (Exception caughtError) {
                err = caughtError //rethrow error later
                sh 'cat *.log'
        }
        finally {
                if (err) throw err // Must re-throw exception to propagate error
        }
}

//Description of a compiler (Must be serializable since pipelines are persistent)
class CC_Desc implements Serializable {
        public String cc_name
        public String cpp_cc
        public String cfa_cc

        CC_Desc(String cc_name, String cpp_cc, String cfa_cc) {
                this.cc_name = cc_name
                this.cpp_cc = cpp_cc
                this.cfa_cc = cfa_cc
        }
}

def compiler_from_params(cc) {
        switch( cc ) {
                case 'gcc-6':
                        return new CC_Desc('gcc-6', 'g++-6', 'gcc-6')
                break
                case 'gcc-5':
                        return new CC_Desc('gcc-5', 'g++-5', 'gcc-5')
                break
                case 'gcc-4.9':
                        return new CC_Desc('gcc-4.9', 'g++-4.9', 'gcc-4.9')
                break
                case 'clang':
                        return new CC_Desc('clang', 'clang++', 'gcc-6')
                break
                default :
                        error "Unhandled compiler : ${cc}"
        }
}

def architecture_from_params( arch ) {
        switch( arch ) {
                case 'x64':
                        return '--host=x86_64'
                break
                case 'x86':
                        return '--host=i386'
                break
                default :
                        error "Unhandled architecture : ${arch}"
        }
}

//===========================================================================================================
// Main compilation routines
//===========================================================================================================
//Compilation script is done here but environnement set-up and error handling is done in main loop
def checkout() {
        build_stage'Checkout'
                //checkout the source code and clean the repo
                checkout scm

                //Clean all temporary files to make sure no artifacts of the previous build remain
                sh 'git clean -fdqx'

                //Reset the git repo so no local changes persist
                sh 'git reset --hard'
}

def build() {
        build_stage'Build'
        
                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=${compiler.cpp_cc} ${architecture} --with-backend-compiler=${compiler.cfa_cc} --prefix=${install_dir} --enable-silent-rules --quiet"

                //Compile the project
                sh 'make -j 8 --no-print-directory V=0 install'
}

def test() {
        build_stage'Test'

                //Run the tests from the tests directory
                if ( do_alltests ) {
                        sh 'make -C src/tests all-tests debug=yes'
                        sh 'make -C src/tests all-tests debug=no'
                }
                else {
                        sh 'make -C src/tests'
                }
}

def benchmark() {
        build_stage'Benchmark'

                if( !do_benchmark ) return

                //Write the commit id to Benchmark
                writeFile  file: 'bench.csv', text:'data=' + gitRefNewValue + ',' + arch_name + ','
 
                //Append bench results
                sh 'make -C src/benchmark --no-print-directory csv-data >> bench.csv'
}

def clean() {
        build_stage'Cleanup'

                //do a maintainer-clean to make sure we need to remake from scratch
                sh 'make maintainer-clean > /dev/null'
}

def build_doc() {
        build_stage'Documentation'

                if( !do_doc ) return

                dir ('doc/user') {
                        make_doc()
                }

                dir ('doc/refrat') {
                        make_doc()
                }
}

def publish() {
        build_stage'Publish'

                if( !do_publish ) return

                //Then publish the results
                sh 'curl --silent --data @bench.csv http://plg2:8082/jenkins/publish > /dev/null || true'
}

//===========================================================================================================
//Routine responsible of sending the email notification once the build is completed
//===========================================================================================================
//Standard build email notification
def email(String status, boolean log) {
        //Since tokenizer doesn't work, figure stuff out from the environnement variables and command line
        //Configurations for email format
        def project_name = (env.JOB_NAME =~ /(.+)\/.+/)[0][1].toLowerCase()

        def gitLog = 'Error retrieving git logs'
        def gitDiff = 'Error retrieving git diff'

        try {

                sh "git rev-list --format=short ${gitRefOldValue}...${gitRefNewValue} > GIT_LOG"
                gitLog = readFile('GIT_LOG')

                sh "git diff --stat ${gitRefNewValue} ${gitRefOldValue} > GIT_DIFF"
                gitDiff = readFile('GIT_DIFF')
        }
        catch (Exception error) {}

        def email_subject = "[${project_name} git][BUILD# ${env.BUILD_NUMBER} - ${status}] - branch ${env.BRANCH_NAME}"
        def email_body = """This is an automated email from the Jenkins build machine. It was
generated because of a git hooks/post-receive script following
a ref change was pushed to the repository containing
the project "UNNAMED PROJECT".

The branch ${env.BRANCH_NAME} has been updated.
   via  ${gitRefOldValue} (commit)
  from  ${gitRefNewValue} (commit)

Check console output at ${env.BUILD_URL} to view the results.

- Status --------------------------------------------------------------

BUILD# ${env.BUILD_NUMBER} - ${status}

- Log -----------------------------------------------------------------
${gitLog}
-----------------------------------------------------------------------
Summary of changes:
${gitDiff}
"""

        def email_to = "pabuhr@uwaterloo.ca, rschlunt@uwaterloo.ca, a3moss@uwaterloo.ca, tdelisle@uwaterloo.ca, brice.dobry@huawei.com, ajbeach@edu.uwaterloo.ca"

        //send email notification
        emailext body: email_body, subject: email_subject, to: email_to, attachLog: log
}