[MNG-8340] Resolve parent according to the exact model location

Author: gnodet

impl/maven-core/src/main/java/org/apache/maven/internal/transformation/impl/DefaultConsumerPomArtifactTransformer.java

@@ -114,6 +114,16 @@ TransformedArtifact createConsumerPomArtifact(
     void transform(MavenProject project, RepositorySystemSession session, Path src, Path tgt)
             throws ModelBuildingException, XMLStreamException, IOException {
         Model model = builder.build(session, project, src);
+        if (model.getParent() != null) {
+            String rel = model.getParent().getRelativePath();
+            if (rel == null) {
+                rel = "..";
+            }
+            if (!rel.isEmpty()) {
+                String newRel = tgt.relativize(src.resolve(src)).toString();
+                model = model.withParent(model.getParent().withRelativePath(newRel));
+            }
+        }
         write(model, tgt);
     }
 

impl/maven-core/src/main/java/org/apache/maven/internal/transformation/impl/DefaultConsumerPomBuilder.java

@@ -21,14 +21,9 @@
 import javax.inject.Inject;
 import javax.inject.Named;
 
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStream;
-import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Objects;
 import java.util.stream.Collectors;
 
 import org.apache.maven.api.SessionData;
@@ -44,7 +39,6 @@
 import org.apache.maven.api.services.ModelBuilderRequest;
 import org.apache.maven.api.services.ModelBuilderResult;
 import org.apache.maven.api.services.ModelSource;
-import org.apache.maven.api.services.Source;
 import org.apache.maven.api.services.model.LifecycleBindingsInjector;
 import org.apache.maven.internal.impl.InternalSession;
 import org.apache.maven.model.v4.MavenModelVersion;
@@ -97,8 +91,7 @@ private ModelBuilderResult buildModel(RepositorySystemSession session, MavenProj
         ModelBuilderRequest.ModelBuilderRequestBuilder request = ModelBuilderRequest.builder();
         request.requestType(ModelBuilderRequest.RequestType.CONSUMER_POM);
         request.session(iSession);
-        // in order to resolve parents, we need to fake being at the correct location
-        request.source(new PomConsumerModelSource(project.getModel().getPomPath(), src));
+        request.source(ModelSource.fromPath(src));
         request.locationTracking(false);
         request.systemProperties(session.getSystemProperties());
         request.userProperties(session.getUserProperties());
@@ -208,63 +201,4 @@ private static List<Repository> pruneRepositories(List<Repository> repositories)
                 .filter(r -> !org.apache.maven.api.Repository.CENTRAL_ID.equals(r.getId()))
                 .collect(Collectors.toList());
     }
-
-    static class PomConsumerModelSource implements ModelSource {
-        final Path path;
-        final Path src;
-
-        PomConsumerModelSource(Path path, Path src) {
-            this.path = path;
-            this.src = src;
-        }
-
-        @Override
-        public Path getPath() {
-            return path;
-        }
-
-        @Override
-        public InputStream openStream() throws IOException {
-            return Files.newInputStream(src);
-        }
-
-        @Override
-        public String getLocation() {
-            return src.toString();
-        }
-
-        @Override
-        public Source resolve(String relative) {
-            return ModelSource.fromPath(path.resolve(relative));
-        }
-
-        @Override
-        public ModelSource resolve(ModelLocator locator, String relative) {
-            String norm = relative.replace('\\', File.separatorChar).replace('/', File.separatorChar);
-            Path path = getPath().getParent().resolve(norm);
-            Path relatedPom = locator.locateExistingPom(path);
-            if (relatedPom != null) {
-                return ModelSource.fromPath(relatedPom);
-            }
-            return null;
-        }
-
-        @Override
-        public boolean equals(Object o) {
-            return this == o
-                    || o.getClass() == getClass()
-                            && Objects.equals(path, ((PomConsumerModelSource) o).path)
-                            && Objects.equals(src, ((PomConsumerModelSource) o).src);
-        }
-
-        @Override
-        public int hashCode() {
-            return Objects.hash(path, src);
-        }
-
-        @Override
-        public String toString() {
-            return "PomConsumerModelSource[" + "path=" + path + ']';
-        }
-    }
 }

impl/maven-impl/src/main/java/org/apache/maven/internal/impl/model/DefaultModelBuilder.java

@@ -1169,8 +1169,12 @@ private Model readEffectiveModel() throws ModelBuilderException {
                     relPath = inputModel
                             .getPomFile()
                             .getParent()
+                            .toAbsolutePath()
                             .relativize(parentModel.getPomFile().getParent())
                             .toString();
+                    if (relPath.equals("..")) {
+                        relPath = null;
+                    }
                 } else {
                     relPath = "..";
                 }