chore: derive shared-dependencies version from effective pom

dashboard/src/main/java/com/google/cloud/tools/opensource/cloudbomdashboard/ArtifactMavenData.java

@@ -16,6 +16,8 @@
 
 package com.google.cloud.tools.opensource.cloudbomdashboard;
 
+import com.google.cloud.tools.opensource.dependencies.RepositoryUtility;
+import com.google.common.collect.ImmutableList;
 import java.io.BufferedInputStream;
 import java.io.File;
 import java.io.FileInputStream;
@@ -25,21 +27,34 @@
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Date;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import org.apache.commons.io.FileUtils;
 import org.apache.maven.artifact.repository.metadata.Metadata;
 import org.apache.maven.artifact.repository.metadata.io.xpp3.MetadataXpp3Reader;
-import org.apache.maven.model.Dependency;
 import org.apache.maven.model.Model;
+import org.apache.maven.model.building.DefaultModelBuilderFactory;
+import org.apache.maven.model.building.DefaultModelBuildingRequest;
+import org.apache.maven.model.building.ModelBuilder;
+import org.apache.maven.model.building.ModelBuildingException;
+import org.apache.maven.model.building.ModelBuildingRequest;
 import org.apache.maven.model.io.xpp3.MavenXpp3Reader;
+import org.apache.maven.project.ProjectModelResolver;
 import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
+import org.eclipse.aether.RepositorySystem;
+import org.eclipse.aether.RepositorySystemSession;
 import org.eclipse.aether.artifact.Artifact;
+import org.eclipse.aether.internal.impl.DefaultRemoteRepositoryManager;
+import org.eclipse.aether.repository.RemoteRepository;
 
 /** Container class for all artifact data pulled from Maven central. */
 public class ArtifactMavenData {
 
   private static DateFormat dateFormat = new SimpleDateFormat("yyyyMMddhhmmss");
   private static DateFormat outputFormat = new SimpleDateFormat("MM-dd-yyyy");
 
+  private static final Logger LOGGER = Logger.getLogger(ArtifactMavenData.class.getName());
+
   private final Artifact artifact;
 
   private final String latestVersion,
@@ -220,21 +235,33 @@ private static String getSharedDependenciesVersionFromUrl(String pomUrl) {
       FileUtils.copyInputStreamToFile(input, pomFile);
       MavenXpp3Reader read = new MavenXpp3Reader();
       Model model = read.read(new FileInputStream(pomFile));
-      if (model.getDependencyManagement() == null) {
-        return null;
-      }
-      for (Dependency dep : model.getDependencyManagement().getDependencies()) {
-        if ("com.google.cloud".equals(dep.getGroupId())
-            && "google-cloud-shared-dependencies".equals(dep.getArtifactId())) {
-          if (dep.getVersion().startsWith("${")) {
-            String sharedVersion = dep.getVersion().substring(1).replaceAll("[{}]", "");
-            return model.getProperties().getProperty(sharedVersion);
-          }
-          return dep.getVersion();
-        }
-      }
-
-    } catch (XmlPullParserException | IOException ignored) {
+      ModelBuildingRequest request = new DefaultModelBuildingRequest();
+      request.setRawModel(model);
+      RepositorySystem repositorySystem = RepositoryUtility.newRepositorySystem();
+      RepositorySystemSession session = RepositoryUtility.newSession(repositorySystem);
+
+      // Set model resolver to locate parent POM on Maven Central.
+      RemoteRepository mavenCentral =
+          new RemoteRepository.Builder("central", "default", "https://repo1.maven.org/maven2/")
+              .build();
+      request.setModelResolver(
+          new ProjectModelResolver(
+              session,
+              null,
+              repositorySystem,
+              new DefaultRemoteRepositoryManager(),
+              ImmutableList.of(mavenCentral),
+              null,
+              null));
+
+      // Capture java version from system environment for profile activation.
+      request.setSystemProperties(System.getProperties());
+
+      ModelBuilder builder = new DefaultModelBuilderFactory().newInstance();
+      Model effectiveModel = builder.build(request).getEffectiveModel();
+      return effectiveModel.getProperties().getProperty("google-cloud-shared-dependencies.version");
+    } catch (XmlPullParserException | IOException | ModelBuildingException exception) {
+      LOGGER.log(Level.SEVERE, exception, () -> "Failed to parse contents of POM file: " + pomUrl);
     }
     return null;
   }