Remove workarounds introduced in jenkinsci#510

src/main/java/org/jenkins/tools/test/PluginCompatTester.java

@@ -112,8 +112,6 @@ public void testPlugins() throws PluginCompatibilityTesterException {
 
             // Sanity check all plugins in the repository come from the same hash/tag
             for (List<Plugin> pluginList : pluginsByRepository.values()) {
-                // the legacy extractors set the hash to the tag - so we only need to check the hash to cover modern and
-                // legacy
                 Set<String> hashes = pluginList.stream().map(Plugin::getGitHash).collect(Collectors.toSet());
                 if (hashes.size() != 1) {
                     throw new IllegalArgumentException("Repository "

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

@@ -20,7 +20,6 @@ public boolean check(@NonNull BeforeCheckoutContext context) {
             justification = "We are not used Git SHA comparisons for security")
     @Override
     public void action(@NonNull BeforeCheckoutContext context) throws PluginSourcesUnavailableException {
-        // legacy extractors set the gitHash to the tag - so we just need to check the tag.
         String gitHash = context.getPlugin().getGitHash();
         if (gitHash == null || gitHash.equals("HEAD")) {
             throw new PluginSourcesUnavailableException("Failed to check out plugin sources for "

src/main/java/org/jenkins/tools/test/model/plugin_metadata/PluginMetadataExtractor.java

@@ -1,18 +1,30 @@
 package org.jenkins.tools.test.model.plugin_metadata;
 
+import edu.umd.cs.findbugs.annotations.NonNull;
+import java.util.jar.Attributes;
 import java.util.jar.Manifest;
 import org.apache.maven.model.Model;
 import org.jenkins.tools.test.exception.MetadataExtractionException;
 
 /**
+ * Extractor that obtains all the information from the plugin's manifest file.
+ * This requires the plugin to have been built with {@code maven-hpi-plugin} 3.42 or newer.
+ *
  * @author jnord
  */
-public interface PluginMetadataExtractor {
+public final class PluginMetadataExtractor {
 
-    /**
-     * Determine whether the extractor is applicable to the given plugin.
-     */
-    boolean isApplicable(String pluginId, Manifest manifest, Model model);
+    private static final Attributes.Name PLUGIN_SCM_CONNECTION = new Attributes.Name("Plugin-ScmConnection");
+    private static final Attributes.Name PLUGIN_SCM_TAG = new Attributes.Name("Plugin-ScmTag");
+    private static final Attributes.Name PLUGIN_ID = new Attributes.Name("Short-Name");
+    private static final Attributes.Name PLUGIN_NAME = new Attributes.Name("Long-Name");
+    private static final Attributes.Name PLUGIN_VERSION = new Attributes.Name("Plugin-Version");
+    private static final Attributes.Name IMPLEMENTATION_BUILD = new Attributes.Name("Implementation-Build");
+
+    // Suppress default constructor for noninstantiability
+    private PluginMetadataExtractor() {
+        throw new AssertionError();
+    }
 
     /**
      * Obtain the metadata for a give plugin from a jar file.
@@ -21,5 +33,22 @@ public interface PluginMetadataExtractor {
      * @param model the plugins' model (from the HPI).
      * @return a fully populated {@link Plugin} for the given plugin.
      */
-    Plugin extractMetadata(String pluginId, Manifest manifest, Model model) throws MetadataExtractionException;
+    @NonNull
+    public static Plugin extractMetadata(String pluginId, Manifest manifest, Model model)
+            throws MetadataExtractionException {
+        // All the information is stored in the plugin's manifest
+        Attributes mainAttributes = manifest.getMainAttributes();
+
+        assert pluginId.equals(mainAttributes.getValue(PLUGIN_ID));
+
+        return new Plugin.Builder()
+                .withPluginId(mainAttributes.getValue(PLUGIN_ID))
+                .withName(mainAttributes.getValue(PLUGIN_NAME))
+                .withScmConnection(mainAttributes.getValue(PLUGIN_SCM_CONNECTION))
+                .withTag(mainAttributes.getValue(PLUGIN_SCM_TAG))
+                .withGitHash(mainAttributes.getValue(IMPLEMENTATION_BUILD))
+                .withModule(":" + mainAttributes.getValue(PLUGIN_ID))
+                .withVersion(mainAttributes.getValue(PLUGIN_VERSION))
+                .build();
+    }
 }

src/main/java/org/jenkins/tools/test/util/WarExtractor.java

@@ -35,9 +35,6 @@ public class WarExtractor {
     @NonNull
     private final File warFile;
 
-    @NonNull
-    private final List<PluginMetadataExtractor> extractors;
-
     @CheckForNull
     private final Set<String> includedPlugins;
 
@@ -47,7 +44,6 @@ public class WarExtractor {
     public WarExtractor(
             File warFile, ServiceHelper serviceHelper, Set<String> includedPlugins, Set<String> excludedPlugins) {
         this.warFile = warFile;
-        this.extractors = serviceHelper.loadServices(PluginMetadataExtractor.class);
         this.includedPlugins = includedPlugins;
         this.excludedPlugins = excludedPlugins;
     }
@@ -140,14 +136,8 @@ private Plugin getPlugin(JarFile jf, JarEntry entry) throws MetadataExtractionEx
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }
-        // Once all plugins have adopted https://github.com/jenkinsci/maven-hpi-plugin/pull/436 this can be simplified
         LOGGER.log(Level.INFO, "Extracting metadata for {0}", pluginId);
-        for (PluginMetadataExtractor extractor : extractors) {
-            if (extractor.isApplicable(pluginId, manifest, model)) {
-                return extractor.extractMetadata(pluginId, manifest, model);
-            }
-        }
-        throw new MetadataExtractionException("No metadata could be extracted for entry " + entry.getName());
+        return PluginMetadataExtractor.extractMetadata(pluginId, manifest, model);
     }
 
     /**

src/test/java/org/jenkins/tools/test/model/plugin_metadata/PluginMetadataExtractorTest.java

@@ -0,0 +1,34 @@
+package org.jenkins.tools.test.model.plugin_metadata;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.allOf;
+import static org.hamcrest.Matchers.hasProperty;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.startsWith;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import java.io.InputStream;
+import java.util.jar.Manifest;
+import org.junit.jupiter.api.Test;
+
+class PluginMetadataExtractorTest {
+
+    @Test
+    void extractMetadata() throws Exception {
+        try (InputStream resourceAsStream =
+                PluginMetadataExtractorTest.class.getResourceAsStream("PluginMetadataExtractorTest/MANIFEST.MF")) {
+            assertNotNull(resourceAsStream);
+            Manifest manifest = new Manifest(resourceAsStream);
+            Plugin plugin = PluginMetadataExtractor.extractMetadata("aws-java-sdk-ec2", manifest, null);
+            assertThat(
+                    plugin,
+                    allOf(
+                            hasProperty("pluginId", is("aws-java-sdk-ec2")),
+                            hasProperty("gitUrl", is("https://github.com/jenkinsci/aws-java-sdk-plugin.git")),
+                            hasProperty("module", is(":aws-java-sdk-ec2")),
+                            hasProperty("gitHash", is("938ad577f750694635f3c0160ac2110db5d6eb98")),
+                            hasProperty("name", is("Amazon Web Services SDK :: EC2")),
+                            hasProperty("version", startsWith("1.12.406-373.v59d2b_d41281b_"))));
+        }
+    }
+}