build.gradle

apply plugin: "eclipse"
apply plugin: "eclipse-wtp"
apply plugin: "idea"

apply plugin: "war"
// apply plugin: "com.google.cloud.tools.appengine"
// see https://github.com/GoogleCloudPlatform/app-gradle-plugin/issues/125
project.pluginManager.apply com.google.cloud.tools.gradle.appengine.standard.AppEngineStandardPlugin

apply plugin: "checkstyle"
apply plugin: "pmd"
apply plugin: "com.github.spotbugs"
apply plugin: "jacoco"

def appengineVersion = "1.9.+"
def checkstyleVersion = "8.10.1"
def pmdVersion = "6.6.0"
def spotbugsVersion = "3.1.7"
def jacocoVersion = "0.8.1"
def guavaVersion = "22.0"

buildscript {
    repositories {
        jcenter()
        maven {
            url "https://plugins.gradle.org/m2/"
        }
    }
    dependencies {
        classpath "com.google.cloud.tools:appengine-gradle-plugin:1.3.5"
        classpath "gradle.plugin.com.github.spotbugs:spotbugs-gradle-plugin:1.6.3"
    }
}

configurations {
    staticAnalysis
}

configurations.all {
    resolutionStrategy {
        eachDependency { DependencyResolveDetails details ->
            // Replace all instances of Guava JDK5 Backport with vanilla Guava.
            // We have to be very careful when updating libraries that depend on Guava and make sure
            // the Guava version used in every library is not too far away from the Guava JDK5 Backport
            // because Guava is not fully backwards compatible due to its deprecation policy.
            // Currently, the only instance of `guava-jdk5` is used by `google-api-client`.
            // This has been fixed in https://github.com/google/google-api-java-client/pull/1070 but has
            // not been released as of the time of writing. Once the new version (>1.23.0) is released,
            // we can update the `google-api-client` dependency and remove this block of code.
            if (details.requested.group == 'com.google.guava' && details.requested.name == 'guava-jdk5') {
                details.useTarget 'com.google.guava:guava:${guavaVersion}'
            }
        }
    }
}

repositories {
    jcenter()
}

def objectify = "com.googlecode.objectify:objectify:5.1.22"
def testng = "org.testng:testng:6.9.4"

dependencies {
    staticAnalysis  "com.puppycrawl.tools:checkstyle:${checkstyleVersion}",
                    "net.sourceforge.pmd:pmd-java:${pmdVersion}",
                    "com.github.spotbugs:spotbugs:${spotbugsVersion}",
                    "de.andrena.tools.macker:macker:1.0.1",
                    "org.jacoco:org.jacoco.build:${jacocoVersion}"

    annotationProcessor objectify

    compile         "com.google.appengine:appengine-api-1.0-sdk:${appengineVersion}",
                    "com.google.appengine.tools:appengine-gcs-client:0.7",
                    "com.google.code.gson:gson:2.8.5",
                    "com.google.guava:guava:${guavaVersion}",
                    objectify,
                    "com.googlecode.owasp-java-html-sanitizer:owasp-java-html-sanitizer:20180219.1",
                    "com.mailjet:mailjet-client:4.1.1",
                    "com.sendgrid:sendgrid-java:4.2.1",
                    "com.sun.jersey:jersey-client:1.19.4",
                    "com.sun.jersey:jersey-core:1.19.4",
                    "com.sun.jersey.contribs:jersey-multipart:1.19.4",
                    "org.jsoup:jsoup:1.11.3"

    testAnnotationProcessor testng

    testCompile     "com.google.appengine:appengine-api-stubs:${appengineVersion}",
                    "com.google.appengine:appengine-remote-api:${appengineVersion}",
                    "com.google.appengine:appengine-testing:${appengineVersion}",
                    "org.httpunit:httpunit:1.7.2",
                    "org.seleniumhq.selenium:selenium-java:2.53.1",
                    testng,
                    "org.kohsuke:wordnet-random-name:1.3",
                    // For access of Google APIs such as HTTP transport, authentication and JSON parsing
                    "com.google.api-client:google-api-client:1.23.0",
                    // For supporting authorization code flow locally
                    "com.google.oauth-client:google-oauth-client-jetty:1.23.0",
                    // For using Gmail API
                    "com.google.apis:google-api-services-gmail:v1-rev91-1.23.0"

}

sourceSets {
    main {
        java {
            srcDir "src/main/java"
            include "**/*.java"
        }
        resources {
            srcDir "src/main/resources"
            exclude "**/*.java"
        }
    }
    test {
        java {
            srcDir "src/test/java"
            srcDir "src/client/java"
            include "**/*.java"
        }
        resources {
            srcDir "src/test/resources"
            exclude "**/*.java"
        }
    }
}

// SETUP TASKS

task createConfigs {
    description "Sets up the project by obtaining necessary files and configurations points."
    group "Setup"
    doLast {
        def templatesToCopy = [
            "gradle.template.properties",
            "src/main/resources/build.template.properties",
            "src/test/resources/test.template.properties",
            "src/main/webapp/WEB-INF/appengine-web.template.xml"
        ]
        templatesToCopy.findAll {
            !(new File(it.replace(".template", ""))).exists()
        }.each {
            filename -> copy {
                from filename
                into filename.startsWith("src/") ? new File(filename).getParent() : "${projectDir}"
                rename '(.*).template(.*)', '$1$2'
            }
        }
    }
}

import org.gradle.plugins.ide.eclipse.model.SourceFolder

eclipse {
    project {
        natures "org.eclipse.jdt.core.javanature", "org.eclipse.buildship.core.gradleprojectnature", "org.eclipse.wst.jsdt.core.jsNature"
        buildCommand "org.eclipse.jdt.core.javabuilder"
        buildCommand "org.eclipse.buildship.core.gradleprojectbuilder"
        buildCommand "org.eclipse.wst.validation.validationbuilder"
        buildCommand "com.google.cloud.tools.eclipse.appengine.standard.java8.appengineWeb"

        // Exclude the CLI and IntelliJ build directories
        // Gradle Eclipse plugin does not support generation of resource filters yet
        // Use the method lined out in https://discuss.gradle.org/t/eclipse-pluging-adding-resource-filters/5408/2
        file {
            withXml { xmlProvider ->
                Node node = xmlProvider.asNode().filteredResources[0]
                ['build', 'out'].each { folder ->
                    Node filter = node.appendNode('filter')
                    filter.appendNode('id', folder.hashCode())
                    filter.appendNode('name', '')
                    filter.appendNode('type', 10)
                    Node matcher = filter.appendNode('matcher')
                    matcher.appendNode('id', 'org.eclipse.ui.ide.multiFilter')
                    matcher.appendNode('arguments', "1.0-name-matches-false-false-${folder}")
                }
            }
        }
    }
    classpath {
        containers "org.eclipse.buildship.core.gradleclasspathcontainer",
                   "org.eclipse.jst.server.core.container/com.google.cloud.tools.eclipse.appengine.standard.runtimeClasspathProvider/App Engine Standard Runtime"
        defaultOutputDir = file("build-eclipse/classes")
        file {
            whenMerged { cp ->
                cp.entries.findAll {
                    it instanceof SourceFolder && !it.path.startsWith("src/main/")
                }*.output = "build-eclipse/test-classes"
            }
        }
    }
    wtp {
        facet {
            facets = []
            facet name: "jst.web", version: "3.1"
            facet name: "jst.java", version: "1.8"
            facet name: "wst.jsdt.web", version: "1.0"
            facet name: "com.google.cloud.tools.eclipse.appengine.facets.standard", version: "JRE8"
        }
    }
}

eclipseProject {
    onlyIf {
        !(new File(".project")).exists()
    }
}

eclipseClasspath {
    onlyIf {
        !(new File(".classpath")).exists()
    }
}

task createEclipseLaunches {
    doLast {
        def templatesToCopy = [
                ".templates/eclipseLaunches/All tests.launch.xml",
                ".templates/eclipseLaunches/CI tests.launch.xml",
                ".templates/eclipseLaunches/Failed tests.launch.xml",
                ".templates/eclipseLaunches/Local tests.launch.xml"
        ]
        templatesToCopy.findAll {
            !(new File(it.replace(".templates/eclipseLaunches", ".launches").replace(".xml", ""))).exists()
        }.each { filename ->
            copy {
                from filename
                into ".launches"
                rename '(.*).xml', '$1'
            }
            filename = filename.replace(".templates/eclipseLaunches", ".launches").replace(".xml", "")
            def fileContents = new File(filename).getText("UTF-8")
            def projectName = "${projectDir}".replaceAll(/.*(\/|\\)/, "")
            new File(filename).text = new File(filename).getText("UTF-8").replaceAll(/\$\{project\.name\}/, projectName)
        }
    }
}

task setupEclipse {
    description "Sets up the Eclipse-specific configurations for the project."
    group "Setup"
    dependsOn eclipseClasspath, eclipseProject, createEclipseLaunches
}

String intellijSetupGroup = 'IntelliJ IDEA Setup'

// IntelliJ Project Setup

// Use a different buildDir for IntelliJ builds to avoid conflict with CLI builds.
// IDE detection is achieved by checking `idea.paths.selector`, a system property that IntelliJ sets.
// Note that this property is not documented and may change anytime.
if (System.getProperty('idea.paths.selector') != null) {
    // Nest the buildDir inside IntelliJ's default project compiler output directory
    buildDir = new File(projectDir, 'out/build')
}

idea {
    module {
        // Exclude the CLI and Eclipse build directories
        excludeDirs += [file('build'), file('build-eclipse')]
    }
}

task setupIntellijRunConfigs(type: Copy) {
    description 'Sets up the run configurations in the IntelliJ project.'
    group intellijSetupGroup
    doFirst {
        if (!file('.idea').exists()) {
            throw new GradleException('Please import the project into IntelliJ first.')
        }
    }
    from '.templates/ideaRunConfigurations'
    into '.idea/runConfigurations'
}

task setupIntellij {
    description 'Sets up the IntelliJ-specific configurations for the project.'
    group intellijSetupGroup
    dependsOn setupIntellijRunConfigs
}

// IntelliJ project static analysis plugins setup

task copyStylelintConfiguration {
    // Cannot use copy task directly when copying to project root on Windows due to the
    // file-locking mechanism interfering with the way inputs and outputs are monitored
    // (see https://issues.gradle.org/browse/GRADLE-3002).
    // We use the copy method instead, which works because it does not do incremental
    // building (inputs and outputs are not monitored).
    group intellijSetupGroup
    doLast {
        copy {
            from 'static-analysis/teammates-stylelint.yml'
            into projectDir
            rename { '.stylelintrc.yml' }
        }
    }
}

task copyIntelliJProjectPluginsSettings(type: Copy) {
    group intellijSetupGroup
    from '.templates/ideaPlugins'
    into '.idea'
    mustRunAfter copyStylelintConfiguration
}

task syncIntelliJCheckStyleVersion {
    description 'Syncs the CheckStyle-IDEA version to the same with the build script.' +
            'Also executes automatically during configuration phase'
    group intellijSetupGroup

    if (file('.idea/checkstyle-idea.xml').exists()) {
        String filePath = '.idea/checkstyle-idea.xml'
        Node xml = new XmlParser().parse(filePath)
        Node checkStyleComponent = (Node) (xml.component.find { it.@name == 'CheckStyle-IDEA' })
        Node checkStyleConfigurationMap = (Node) (checkStyleComponent.option.find { it.@name == 'configuration' })
        Node checkStyleVersionEntry =
                (Node) (checkStyleConfigurationMap.map.entry.find { it.@key == 'checkstyle-version' })

        checkStyleVersionEntry.@value = checkstyleVersion

        writeXmlToPath(xml, filePath)
    }
}

task setupIntellijStaticAnalysis {
    description 'Sets up the static analysis plugins in the IntelliJ project.'
    group intellijSetupGroup

    dependsOn copyStylelintConfiguration, copyIntelliJProjectPluginsSettings
    finalizedBy syncIntelliJCheckStyleVersion
}

// RUN SERVER TASKS

compileJava.options.encoding = "UTF-8"
compileTestJava.options.encoding = "UTF-8"

appengine {
    run {
        port = 8080
        jvmFlags = ["-Xss2m", "-Dfile.encoding=UTF-8",
                // Absolute paths are not supported, the following is relative to the project directory
                // These only specify the datastore/blobstore paths, but search indexes are still generated in WEB-INF/appengine-generated
                "-Ddatastore.backing_store=../../appengine-generated/local_db.bin",
                "-Dblobstore.backing_store=../../appengine-generated"]
    }
    deploy {
        String appengineWebXmlPath = "${projectDir}/src/main/webapp/WEB-INF/appengine-web.xml"
        Node appengineWebXml = new File(appengineWebXmlPath).exists() ? new XmlParser().parse(appengineWebXmlPath) : null
        project = appengineWebXml == null ? null : appengineWebXml.application.text()
        version = appengineWebXml == null ? null : appengineWebXml.version.text()
        stopPreviousVersion = false
        promote = false
    }
}

task appengineDeployAll {
    description "Deploy an App Engine application and all its extended configurations"
    group "App Engine Standard environment"
    dependsOn appengineDeploy, appengineDeployIndex, appengineDeployCron, appengineDeployQueue
}

// STATIC ANALYSIS TASKS

def isWindows = System.getProperty("os.name").toLowerCase().contains("windows")

checkstyle {
    toolVersion = checkstyleVersion
    configFile = file("static-analysis/teammates-checkstyle.xml")
}

pmd {
    toolVersion = pmdVersion
    consoleOutput = true
    ruleSetFiles = files("static-analysis/teammates-pmd.xml", "static-analysis/teammates-pmdMain.xml")
    ruleSets = []
}

spotbugs {
    reportLevel = "low"
    toolVersion = spotbugsVersion
    includeFilter = file("$rootProject.projectDir/static-analysis/teammates-spotbugs.xml")
}

tasks.withType(com.github.spotbugs.SpotBugsTask) {
    reports {
        xml.enabled = false
        html.enabled = false
        emacs.enabled = true
    }
}

spotbugsMain {
    finalizedBy "printSpotbugsMainViolations"
}

task printSpotbugsMainViolations {
    onlyIf {
        file("${buildDir}/reports/spotbugs/main.emacs").exists()
    }
    doFirst {
        print new File("${buildDir}/reports/spotbugs/main.emacs").getText("UTF-8")
    }
}

spotbugsTest {
    finalizedBy "printSpotbugsTestViolations"
}

task printSpotbugsTestViolations {
    onlyIf {
        file("${buildDir}/reports/spotbugs/test.emacs").exists()
    }
    doFirst {
        print new File("${buildDir}/reports/spotbugs/test.emacs").getText("UTF-8")
    }
}

task downloadStaticAnalysisTools {
    description "Downloads all static analysis tools."
    group "Static analysis"
    doFirst {
        configurations.staticAnalysis.resolve()
    }
}

task lintMain {
    dependsOn checkstyleMain, pmdMain, spotbugsMain
}

task lintTest {
    dependsOn checkstyleTest, pmdTest, spotbugsTest
}

task macker {
    doLast {
        logging.setLevel(LogLevel.INFO)
        ant.taskdef(name: "macker", classpath: configurations.staticAnalysis.asPath, classname: "de.andrena.tools.macker.ant.MackerAntTask")
        ant.macker(failonerror: true, verbose: false) {
            rules(dir: "${projectDir}/static-analysis", includes: "teammates-macker.xml")
            classes(dir: "${buildDir}/classes") {
                include(name: "**/*.class")
            }
        }
    }
}

macker.dependsOn testClasses
macker.shouldRunAfter lintMain, lintTest

task lint {
    description "Runs the entire static analysis tasks for back-end."
    group "Static analysis"
    dependsOn lintMain, lintTest, macker
}

// TEST TASKS

def numOfTestRetries = 3
def isTravis = System.getenv("TRAVIS") != null
def isAppVeyor = System.getenv("APPVEYOR") != null

// Displays full exception; to be run after the test fails after the last retry
// For HTML tests, the exception is displayed in diff form instead of the extremely verbose full exception message
def afterTestClosure = { descriptor, result ->
    if (result.resultType == TestResult.ResultType.FAILURE && result.exception != null && result.exception.getMessage() != null) {
        println ""

        def msg = result.exception.getMessage()
        def shouldDisplayAsDiff = msg.indexOf("<<[expected>") != -1
        if (shouldDisplayAsDiff) {
            def expectedFileName = "expected-${descriptor.getClassName()}"
            def actualFileName = "actual-${descriptor.getClassName()}"
            file("${expectedFileName}").text = msg[(msg.indexOf("<<[expected>") + 12)..(msg.indexOf("</expected]>>") - 1)]
            file("${actualFileName}").text = msg[(msg.indexOf("<<[actual>") + 10)..(msg.indexOf("</actual]>>") - 1)]
            def diffCommand = isWindows ? "FC" : "diff"
            def process = "${diffCommand} ${expectedFileName} ${actualFileName}".execute()
            println process.getText()
            process.waitFor()
            if (!isAppVeyor && !isTravis) { // CI does not allow deleting files
                def deleteCommand = isWindows ? "del" : "rm"
                "${deleteCommand} ${expectedFileName}".execute()
                "${deleteCommand} ${actualFileName}".execute()
            }
        } else {
            println "${result.exception.getClass().getName()}: ${result.exception.getMessage()}"
        }

        for (StackTraceElement ste : result.exception.getStackTrace()) {
            if (ste.getClassName().contains("NativeMethodAccessorImpl")) {
                // Everything after this line is the internal workings of TestNG, not important for us
                println "\t..."
                break
            }
            println "\tat ${ste.getClassName()}.${ste.getMethodName()}(${ste.getFileName()}:${ste.getLineNumber()})"
        }
    }
}

import org.gradle.internal.serialize.PlaceholderException

def checkTestNgFailureClosure = { descriptor, result ->
    if (result.exception instanceof PlaceholderException
            && result.exception.toString().startsWith("org.gradle.api.internal.tasks.testing.TestSuiteExecutionException")) {
        result.exception.printStackTrace()
        throw new GradleException("Detected TestNG failure")
    }
}

test {
    useTestNG()
    options.useDefaultListeners = true
    ignoreFailures false
    maxHeapSize = "1g"
    reports.html.enabled = false
    reports.junitXml.enabled = false
    jvmArgs "-Xss2m", "-Dfile.encoding=UTF-8"
    afterTest afterTestClosure
    testLogging {
        events "passed"
    }
}

task localTests(type: Test) {
    useTestNG()
    options.suites "src/test/testng-local.xml"
    options.outputDirectory = file("build/reports/test-local")
    options.useDefaultListeners = true
    ignoreFailures false
    maxHeapSize = "1g"
    reports.html.enabled = false
    reports.junitXml.enabled = false
    jvmArgs "-Xss2m", "-Dfile.encoding=UTF-8"
    afterTest afterTestClosure
    testLogging {
        events "passed"
    }
}

task failedTests(type: Test) {
    useTestNG()
    options.suites "test-output/testng-failed.xml"
    options.outputDirectory = file("build/reports/test-failed")
    options.useDefaultListeners = true
    ignoreFailures false
    maxHeapSize = "1g"
    reports.html.enabled = false
    reports.junitXml.enabled = false
    jvmArgs "-Xss2m", "-Dfile.encoding=UTF-8"
    afterTest afterTestClosure
    testLogging {
        events "passed"
    }
}

task ciTests {
    description "Runs the full test suite and retries failed test up to ${numOfTestRetries} times."
    group "Test"
}

(1..numOfTestRetries + 1).each { id ->
    def isFirstTry = id == 1
    def isLastRetry = id == numOfTestRetries + 1
    task "testTry${id}"(type: Test) {
        useTestNG()
        options.suites isFirstTry ? "src/test/testng-ci.xml" : "build/reports/test-try-${id - 1}/testng-failed.xml"
        options.outputDirectory = file("build/reports/test-try-${id}")
        options.useDefaultListeners = true
        ignoreFailures = !isLastRetry
        maxHeapSize = "1g"
        reports.html.enabled = false
        reports.junitXml.enabled = false
        if (isTravis) {
            jvmArgs "-Xss2m", "-Dfile.encoding=UTF-8", "-Djava.io.tmpdir=" + System.getenv("TRAVIS_BUILD_DIR")
        } else {
            jvmArgs "-Xss2m", "-Dfile.encoding=UTF-8"
        }
        testLogging {
            events "passed"
        }
        if (isLastRetry) {
            afterTest afterTestClosure
        } else if (isFirstTry) {
            afterSuite checkTestNgFailureClosure
        }
        finalizedBy "killFirefox${id}", "killChromedriver${id}"
        onlyIf {
            isFirstTry || file("build/reports/test-try-${id - 1}/testng-failed.xml").exists()
        }
    }
    ciTests.dependsOn "testTry${id}"

    task "killFirefox${id}"(type: Exec) {
        doFirst {
            if (isWindows) {
                commandLine "taskkill", "/f", "/im", "firefox.exe"
            } else {
                commandLine "pkill", "firefox"
            }
            // Silence output for this task
            standardOutput = new ByteArrayOutputStream()
            errorOutput = standardOutput
        }
        ignoreExitValue = true
        outputs.upToDateWhen { false }
    }

    task "killChromedriver${id}"(type: Exec) {
        doFirst {
            if (isWindows) {
                commandLine "taskkill", "/f", "/im", "chromedriver.exe"
            } else {
                commandLine "pkill", "chromedriver"
            }
            // Silence output for this task
            standardOutput = new ByteArrayOutputStream()
            errorOutput = standardOutput
        }
        ignoreExitValue = true
        outputs.upToDateWhen { false }
    }
}

// COVERAGE TASKS

jacoco {
    toolVersion = jacocoVersion
}

task jacocoMerge(type: JacocoMerge) {
    destinationFile = file("${buildDir}/jacocoMerge/jacocoMerge.exec")
    executionData fileTree("${buildDir}/jacoco").files
}

task jacocoReport(type: JacocoReport) {
    description "Runs coverage session from available test run data."
    group "Test"
    sourceDirectories = files(sourceSets.main.java.srcDirs, sourceSets.test.java.srcDirs)
    classDirectories = files(sourceSets.main.output, sourceSets.test.output)
    executionData jacocoMerge.destinationFile
    reports {
        xml.enabled true
        html.enabled true
    }
    afterEvaluate {
        classDirectories = files(classDirectories.files.collect {
            fileTree(dir: it, exclude: ["**/*.jar", "teammates/client/**/*", "**/*Filter.class", "**/*Servlet.class"])
        })
    }
    dependsOn jacocoMerge
}

// Helper methods
import groovy.xml.StreamingMarkupBuilder
import java.nio.charset.StandardCharsets

void writeXmlToPath(Node xml, String pathToWrite) {
    new File(pathToWrite).withWriter(StandardCharsets.UTF_8.name()) { out ->
        out << new StreamingMarkupBuilder().bind { mkp.xmlDeclaration() }
        def xmlNodePrinter = new XmlNodePrinter(new PrintWriter(out))
        xmlNodePrinter.preserveWhitespace = true
        xmlNodePrinter.print(xml)
    }
}