[MINVOKER-328] Skip install artifacts with the same source and target path

src/it/MINVOKER-328_install-default/invoker.properties

@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+invoker.goals = verify

src/it/MINVOKER-328_install-default/pom.xml

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.plugins.invoker</groupId>
+  <artifactId>minvoker328</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <packaging>pom</packaging>
+
+  <url>https://issues.apache.org/jira/browse/MINVOKER-328</url>
+  <description>install with default configuration</description>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+      <version>1.7.36</version>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-invoker-plugin</artifactId>
+        <version>@project.version@</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>install</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

src/it/MINVOKER-328_install-default/verify.groovy

@@ -0,0 +1,20 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+File buildLog = new File(basedir, 'build.log')
+assert buildLog.text.contains('[DEBUG] Skip install the same target')

src/main/java/org/apache/maven/plugins/invoker/InstallMojo.java

@@ -19,12 +19,15 @@
 package org.apache.maven.plugins.invoker;
 
 import java.io.File;
+import java.io.IOException;
+import java.io.UncheckedIOException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Optional;
 import java.util.stream.Collectors;
 
@@ -356,25 +359,45 @@ private Artifact resolveArtifact(Artifact artifact, List<RemoteRepository> remot
      */
     private void installArtifacts(Collection<Artifact> resolvedArtifacts) throws InstallationException {
 
+        RepositorySystemSession systemSessionForLocalRepo = createSystemSessionForLocalRepo();
+
         // we can have on dependency two artifacts with the same groupId:artifactId
         // with different version, in such case when we install both in one request
         // metadata will contain only one version
 
         Map<String, List<Artifact>> collect = resolvedArtifacts.stream()
+                .filter(a -> !hasTheSamePathAsTarget(a, systemSessionForLocalRepo))
                 .collect(Collectors.groupingBy(
                         a -> String.format("%s:%s:%s", a.getGroupId(), a.getArtifactId(), a.getVersion()),
                         LinkedHashMap::new,
                         Collectors.toList()));
 
-        RepositorySystemSession systemSessionForLocalRepo = createSystemSessionForLocalRepo();
-
         for (List<Artifact> artifacts : collect.values()) {
             InstallRequest request = new InstallRequest();
             request.setArtifacts(artifacts);
             repositorySystem.install(systemSessionForLocalRepo, request);
         }
     }
 
+    private boolean hasTheSamePathAsTarget(Artifact artifact, RepositorySystemSession systemSession) {
+        try {
+            LocalRepositoryManager lrm = systemSession.getLocalRepositoryManager();
+            File targetBasedir = lrm.getRepository().getBasedir();
+            if (targetBasedir == null) {
+                return false;
+            }
+            File targetFile = new File(targetBasedir, lrm.getPathForLocalArtifact(artifact)).getCanonicalFile();
+            File sourceFile = artifact.getFile().getCanonicalFile();
+            if (Objects.equals(targetFile, sourceFile)) {
+                getLog().debug("Skip install the same target " + sourceFile);
+                return true;
+            }
+            return false;
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
     /**
      * Create a new {@link  RepositorySystemSession} connected with local repo.
      */