BAEL-1451 Writing a Jenkins plugin (#3396)
* BAEL-1451 Writing a Jenkins plugin A sample Jenkins plugin which builds basic project stats * BAEL-1451 Writing a Jenkins plugin Formatting
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Denis
maibin
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6f3710b9ae
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cd4b526789
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.jenkins-ci.plugins</groupId>
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<artifactId>plugin</artifactId>
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<version>2.33</version>
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<relativePath />
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</parent>
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<artifactId>jenkins-hello-world</artifactId>
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<version>1.0-SNAPSHOT</version>
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<packaging>hpi</packaging>
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<properties>
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<!-- Baseline Jenkins version you use to build the plugin. Users must have this version or newer to run. -->
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<jenkins.version>2.7.3</jenkins.version>
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</properties>
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<name>Hello World Plugin</name>
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<description>A sample Jenkins Hello World plugin</description>
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<url>https://wiki.jenkins-ci.org/display/JENKINS/TODO+Plugin</url>
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<licenses>
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<license>
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<name>MIT License</name>
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<url>http://opensource.org/licenses/MIT</url>
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</license>
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</licenses>
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<dependencies>
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<dependency>
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<groupId>org.jenkins-ci.plugins</groupId>
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<artifactId>structs</artifactId>
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<version>1.7</version>
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</dependency>
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<dependency>
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<groupId>org.jenkins-ci.plugins.workflow</groupId>
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<artifactId>workflow-step-api</artifactId>
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<version>2.12</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.jenkins-ci.plugins.workflow</groupId>
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<artifactId>workflow-cps</artifactId>
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<version>2.39</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.jenkins-ci.plugins.workflow</groupId>
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<artifactId>workflow-job</artifactId>
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<version>2.11.2</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.jenkins-ci.plugins.workflow</groupId>
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<artifactId>workflow-basic-steps</artifactId>
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<version>2.6</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.jenkins-ci.plugins.workflow</groupId>
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<artifactId>workflow-durable-task-step</artifactId>
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<version>2.13</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.jenkins-ci.plugins.workflow</groupId>
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<artifactId>workflow-api</artifactId>
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<version>2.20</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.jenkins-ci.plugins.workflow</groupId>
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<artifactId>workflow-support</artifactId>
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<version>2.14</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<repositories>
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<repository>
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<id>repo.jenkins-ci.org</id>
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<url>https://repo.jenkins-ci.org/public/</url>
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</repository>
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</repositories>
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<pluginRepositories>
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<pluginRepository>
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<id>repo.jenkins-ci.org</id>
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<url>https://repo.jenkins-ci.org/public/</url>
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</pluginRepository>
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</pluginRepositories>
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</project>
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@ -0,0 +1,20 @@
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package com.baeldung.jenkins.helloworld;
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public class ProjectStats {
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private final int classesNumber;
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private final int linesNumber;
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public ProjectStats(int classesNumber, int linesNumber) {
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this.classesNumber = classesNumber;
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this.linesNumber = linesNumber;
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}
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public int getClassesNumber() {
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return classesNumber;
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}
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public int getLinesNumber() {
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return linesNumber;
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}
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}
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package com.baeldung.jenkins.helloworld;
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import hudson.Extension;
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import hudson.FilePath;
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import hudson.Launcher;
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import hudson.model.AbstractBuild;
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import hudson.model.AbstractProject;
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import hudson.model.BuildListener;
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import hudson.tasks.BuildWrapper;
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import hudson.tasks.BuildWrapperDescriptor;
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import org.kohsuke.stapler.DataBoundConstructor;
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import javax.annotation.Nonnull;
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import java.io.*;
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import java.nio.charset.StandardCharsets;
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import java.util.Stack;
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public class ProjectStatsBuildWrapper extends BuildWrapper {
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private static final String REPORT_TEMPLATE_PATH = "/stats.html";
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private static final String PROJECT_NAME_VAR = "$PROJECT_NAME$";
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private static final String CLASSES_NUMBER_VAR = "$CLASSES_NUMBER$";
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private static final String LINES_NUMBER_VAR = "$LINES_NUMBER$";
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@DataBoundConstructor
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public ProjectStatsBuildWrapper() {
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}
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@Override
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public Environment setUp(AbstractBuild build, final Launcher launcher, BuildListener listener) {
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return new Environment() {
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@Override
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public boolean tearDown(AbstractBuild build, BuildListener listener)
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throws IOException, InterruptedException
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{
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ProjectStats stats = buildStats(build.getWorkspace());
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String report = generateReport(build.getProject().getDisplayName(), stats);
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File artifactsDir = build.getArtifactsDir();
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if (!artifactsDir.isDirectory()) {
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boolean success = artifactsDir.mkdirs();
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if (!success) {
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listener.getLogger().println("Can't create artifacts directory at "
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+ artifactsDir.getAbsolutePath());
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}
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}
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String path = artifactsDir.getCanonicalPath() + REPORT_TEMPLATE_PATH;
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try (BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(path),
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StandardCharsets.UTF_8))) {
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writer.write(report);
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}
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return super.tearDown(build, listener);
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}
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};
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}
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private static ProjectStats buildStats(FilePath root) throws IOException, InterruptedException {
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int classesNumber = 0;
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int linesNumber = 0;
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Stack<FilePath> toProcess = new Stack<>();
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toProcess.push(root);
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while (!toProcess.isEmpty()) {
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FilePath path = toProcess.pop();
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if (path.isDirectory()) {
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toProcess.addAll(path.list());
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} else if (path.getName().endsWith(".java")) {
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classesNumber++;
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linesNumber += countLines(path);
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}
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}
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return new ProjectStats(classesNumber, linesNumber);
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}
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private static int countLines(FilePath path) throws IOException, InterruptedException {
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byte[] buffer = new byte[1024];
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int result = 1;
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try (InputStream in = path.read()) {
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while (true) {
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int read = in.read(buffer);
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if (read < 0) {
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return result;
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}
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for (int i = 0; i < read; i++) {
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if (buffer[i] == '\n') {
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result++;
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}
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}
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}
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}
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}
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private static String generateReport(String projectName, ProjectStats stats) throws IOException {
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ByteArrayOutputStream bOut = new ByteArrayOutputStream();
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try (InputStream in = ProjectStatsBuildWrapper.class.getResourceAsStream(REPORT_TEMPLATE_PATH)) {
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byte[] buffer = new byte[1024];
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int read;
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while ((read = in.read(buffer)) >= 0) {
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bOut.write(buffer, 0, read);
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}
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}
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String content = new String(bOut.toByteArray(), StandardCharsets.UTF_8);
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content = content.replace(PROJECT_NAME_VAR, projectName);
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content = content.replace(CLASSES_NUMBER_VAR, String.valueOf(stats.getClassesNumber()));
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content = content.replace(LINES_NUMBER_VAR, String.valueOf(stats.getLinesNumber()));
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return content;
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}
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@Extension
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public static final class DescriptorImpl extends BuildWrapperDescriptor {
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@Override
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public boolean isApplicable(AbstractProject<?, ?> item) {
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return true;
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}
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@Nonnull
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@Override
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public String getDisplayName() {
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return "Construct project stats during build";
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}
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}
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}
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@ -0,0 +1,20 @@
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>$PROJECT_NAME$</title>
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</head>
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<body>
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Project $PROJECT_NAME$:
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<table border="1">
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<tr>
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<th>Classes number</th>
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<th>Lines number</th>
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</tr>
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<tr>
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<td>$CLASSES_NUMBER$</td>
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<td>$LINES_NUMBER$</td>
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</tr>
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</table>
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</body>
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</html>
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