[JENKINS-73282] Run PCT with a Jetty 12 EE 8 test harness when core i…

…s Jetty 12 EE 8 (#675)

src/main/java/org/jenkins/tools/test/hook/Jetty12Hook.java

@@ -0,0 +1,66 @@
+package org.jenkins.tools.test.hook;
+
+import edu.umd.cs.findbugs.annotations.NonNull;
+import hudson.util.VersionNumber;
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.util.jar.JarFile;
+import java.util.jar.JarInputStream;
+import java.util.jar.Manifest;
+import java.util.zip.ZipEntry;
+import org.jenkins.tools.test.model.hook.BeforeExecutionContext;
+import org.jenkins.tools.test.model.hook.PluginCompatTesterHookBeforeExecution;
+import org.kohsuke.MetaInfServices;
+
+/**
+ * Ensure that if the core is on Jetty 12, that the test harness is on Jetty 12 as well.
+ */
+@MetaInfServices(PluginCompatTesterHookBeforeExecution.class)
+public class Jetty12Hook extends PropertyVersionHook {
+
+    @Override
+    public String getProperty() {
+        return "jenkins-test-harness.version";
+    }
+
+    @Override
+    public String getMinimumVersion() {
+        return "2230.v4fa_477b_634f4";
+    }
+
+    @Override
+    public boolean check(@NonNull BeforeExecutionContext context) {
+        VersionNumber winstoneVersion = getWinstoneVersion(context.getConfig().getWar());
+        if (winstoneVersion.getDigitAt(0) < 7) {
+            return false;
+        }
+        return super.check(context);
+    }
+
+    private VersionNumber getWinstoneVersion(File war) {
+        try (JarFile jarFile = new JarFile(war)) {
+            ZipEntry zipEntry = jarFile.getEntry("executable/winstone.jar");
+            if (zipEntry == null) {
+                throw new IllegalArgumentException("Failed to find winstone.jar in " + war);
+            }
+            try (InputStream is = jarFile.getInputStream(zipEntry);
+                    BufferedInputStream bis = new BufferedInputStream(is);
+                    JarInputStream jis = new JarInputStream(bis)) {
+                Manifest manifest = jis.getManifest();
+                if (manifest == null) {
+                    throw new IllegalArgumentException("Failed to read manifest in " + war);
+                }
+                String version = manifest.getMainAttributes().getValue("Implementation-Version");
+                if (version == null) {
+                    throw new IllegalArgumentException("Failed to read Winstone version from manifest in " + war);
+                }
+                return new VersionNumber(version);
+            }
+        } catch (IOException e) {
+            throw new UncheckedIOException("Failed to read Winstone version in " + war, e);
+        }
+    }
+}