[maven] 01/01: [MNG-7612] Chained LRM

[sjaranowski]

This is an automated email from the ASF dual-hosted git repository.

sjaranowski pushed a commit to branch MNG-7612
in repository https://gitbox.apache.org/repos/asf/maven.git

commit cfe503f58a2b34a1d58a549bba0e066605a9805e
Author: Tamas Cservenak <ta...@cservenak.net>
AuthorDate: Thu Dec 1 19:53:00 2022 +0100

    [MNG-7612] Chained LRM
    
    Adds new feature: Chained Local Repository Manager.
    
    Cherry-pick f8f56b33c0585638723a20d71eb848d40a1f44e0
    
    ---
    
    https://issues.apache.org/jira/browse/MNG-7612
---
 .../DefaultRepositorySystemSessionFactory.java     | 41 +++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

diff --git 
a/maven-core/src/main/java/org/apache/maven/internal/aether/DefaultRepositorySystemSessionFactory.java
 
b/maven-core/src/main/java/org/apache/maven/internal/aether/DefaultRepositorySystemSessionFactory.java
index c7d04734a..73b351458 100644
--- 
a/maven-core/src/main/java/org/apache/maven/internal/aether/DefaultRepositorySystemSessionFactory.java
+++ 
b/maven-core/src/main/java/org/apache/maven/internal/aether/DefaultRepositorySystemSessionFactory.java
@@ -18,10 +18,13 @@
  */
 package org.apache.maven.internal.aether;
 
+import static java.util.stream.Collectors.toList;
+
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -60,6 +63,7 @@ import org.eclipse.aether.RepositorySystem;
 import org.eclipse.aether.SessionData;
 import org.eclipse.aether.artifact.Artifact;
 import org.eclipse.aether.repository.LocalRepository;
+import org.eclipse.aether.repository.LocalRepositoryManager;
 import org.eclipse.aether.repository.NoLocalRepositoryManagerException;
 import org.eclipse.aether.repository.RepositoryPolicy;
 import org.eclipse.aether.repository.WorkspaceReader;
@@ -67,7 +71,9 @@ import org.eclipse.aether.resolution.ResolutionErrorPolicy;
 import org.eclipse.aether.spi.localrepo.LocalRepositoryManagerFactory;
 import org.eclipse.aether.transform.FileTransformer;
 import org.eclipse.aether.transform.TransformException;
+import org.eclipse.aether.util.ConfigUtils;
 import org.eclipse.aether.util.repository.AuthenticationBuilder;
+import org.eclipse.aether.util.repository.ChainedLocalRepositoryManager;
 import org.eclipse.aether.util.repository.DefaultAuthenticationSelector;
 import org.eclipse.aether.util.repository.DefaultMirrorSelector;
 import org.eclipse.aether.util.repository.DefaultProxySelector;
@@ -81,6 +87,23 @@ import org.slf4j.LoggerFactory;
  */
 @Named
 public class DefaultRepositorySystemSessionFactory {
+    /**
+     * User property for chained LRM: list of "tail" local repository paths 
(separated by comma), to be used with
+     * {@link ChainedLocalRepositoryManager}.
+     * Default value: {@code null}, no chained LRM is used.
+     *
+     * @since 3.9.0
+     */
+    private static final String MAVEN_REPO_LOCAL_TAIL = 
"maven.repo.local.tail";
+
+    /**
+     * User property for chained LRM: should artifact availability be ignored 
in tail local repositories or not.
+     * Default: {@code true}, will ignore availability from tail local 
repositories.
+     *
+     * @since 3.9.0
+     */
+    private static final String MAVEN_REPO_LOCAL_TAIL_IGNORE_AVAILABILITY = 
"maven.repo.local.tail.ignoreAvailability";
+
     private static final String MAVEN_RESOLVER_TRANSPORT_KEY = 
"maven.resolver.transport";
 
     private static final String MAVEN_RESOLVER_TRANSPORT_DEFAULT = "default";
@@ -356,7 +379,23 @@ public class DefaultRepositorySystemSessionFactory {
                 
session.setLocalRepositoryManager(repoSystem.newLocalRepositoryManager(session, 
localRepo));
             }
         } else {
-            
session.setLocalRepositoryManager(repoSystem.newLocalRepositoryManager(session, 
localRepo));
+            LocalRepositoryManager lrm = 
repoSystem.newLocalRepositoryManager(session, localRepo);
+
+            String localRepoTail = ConfigUtils.getString(session, null, 
MAVEN_REPO_LOCAL_TAIL);
+            if (localRepoTail != null) {
+                boolean ignoreTailAvailability =
+                        ConfigUtils.getBoolean(session, true, 
MAVEN_REPO_LOCAL_TAIL_IGNORE_AVAILABILITY);
+                List<LocalRepositoryManager> tail = new ArrayList<>();
+                List<String> paths = Arrays.stream(localRepoTail.split(","))
+                        .filter(p -> p != null && !p.trim().isEmpty())
+                        .collect(toList());
+                for (String path : paths) {
+                    tail.add(repoSystem.newLocalRepositoryManager(session, new 
LocalRepository(path)));
+                }
+                session.setLocalRepositoryManager(new 
ChainedLocalRepositoryManager(lrm, tail, ignoreTailAvailability));
+            } else {
+                session.setLocalRepositoryManager(lrm);
+            }
         }
     }