gnodet commented on code in PR #912:
URL: https://github.com/apache/maven/pull/912#discussion_r1051658567


##########
maven-core/src/main/java/org/apache/maven/ReactorReader.java:
##########
@@ -139,187 +132,75 @@ private File find(MavenProject project, Artifact 
artifact) {
             return project.getFile();
         }
 
-        Artifact projectArtifact = findMatchingArtifact(project, artifact);
-        File packagedArtifactFile = 
determinePreviouslyPackagedArtifactFile(project, projectArtifact);
-
-        if (hasArtifactFileFromPackagePhase(projectArtifact)) {
-            return projectArtifact.getFile();
-        }
-        // Check whether an earlier Maven run might have produced an artifact 
that is still on disk.
-        else if (packagedArtifactFile != null
-                && packagedArtifactFile.exists()
-                && isPackagedArtifactUpToDate(project, packagedArtifactFile, 
artifact)) {
-            return packagedArtifactFile;
-        } else if (!hasBeenPackagedDuringThisSession(project)) {
-            // fallback to loose class files only if artifacts haven't been 
packaged yet
-            // and only for plain old jars. Not war files, not ear files, not 
anything else.
-            return determineBuildOutputDirectoryForArtifact(project, artifact);
-        }
-
-        // The fall-through indicates that the artifact cannot be found;
-        // for instance if package produced nothing or classifier problems.
-        return null;
+        Path target = getArtifactPath(artifact);
+        return Files.isRegularFile(target) ? target.toFile() : null;
     }
 
-    private File determineBuildOutputDirectoryForArtifact(final MavenProject 
project, final Artifact artifact) {
-        if (isTestArtifact(artifact)) {
-            if (project.hasLifecyclePhase("test-compile")) {
-                return new File(project.getBuild().getTestOutputDirectory());
-            }
-        } else {
-            String type = artifact.getProperty("type", "");
-            File outputDirectory = new 
File(project.getBuild().getOutputDirectory());
+    public void processProject(MavenProject project) {
+        List<Artifact> artifacts = new ArrayList<>();
 
-            // Check if the project is being built during this session, and if 
we can expect any output.
-            // There is no need to check if the build has created any outputs, 
see MNG-2222.
-            boolean projectCompiledDuringThisSession =
-                    project.hasLifecyclePhase("compile") && 
COMPILE_PHASE_TYPES.contains(type);
-
-            // Check if the project is part of the session (not filtered by 
-pl, -rf, etc). If so, we check
-            // if a possible earlier Maven invocation produced some output for 
that project which we can use.
-            boolean projectHasOutputFromPreviousSession =
-                    !session.getProjects().contains(project) && 
outputDirectory.exists();
-
-            if (projectHasOutputFromPreviousSession || 
projectCompiledDuringThisSession) {
-                return outputDirectory;
-            }
+        artifacts.add(RepositoryUtils.toArtifact(new 
ProjectArtifact(project)));
+        if (!"pom".equals(project.getPackaging())) {
+            org.apache.maven.artifact.Artifact mavenMainArtifact = 
project.getArtifact();
+            artifacts.add(RepositoryUtils.toArtifact(mavenMainArtifact));
         }
-
-        // The fall-through indicates that the artifact cannot be found;
-        // for instance if package produced nothing or classifier problems.
-        return null;
-    }
-
-    private File determinePreviouslyPackagedArtifactFile(MavenProject project, 
Artifact artifact) {
-        if (artifact == null) {
-            return null;
+        for (org.apache.maven.artifact.Artifact attached : 
project.getAttachedArtifacts()) {
+            artifacts.add(RepositoryUtils.toArtifact(attached));
         }
 
-        String fileName = String.format("%s.%s", 
project.getBuild().getFinalName(), artifact.getExtension());
-        return new File(project.getBuild().getDirectory(), fileName);
-    }
-
-    private boolean hasArtifactFileFromPackagePhase(Artifact projectArtifact) {
-        return projectArtifact != null
-                && projectArtifact.getFile() != null
-                && projectArtifact.getFile().exists();
-    }
-
-    private boolean isPackagedArtifactUpToDate(MavenProject project, File 
packagedArtifactFile, Artifact artifact) {
-        Path outputDirectory = 
Paths.get(project.getBuild().getOutputDirectory());
-        if (!outputDirectory.toFile().exists()) {
-            return true;
-        }
-
-        try (Stream<Path> outputFiles = Files.walk(outputDirectory)) {
-            // Not using File#lastModified() to avoid a Linux JDK8 
milliseconds precision bug: JDK-8177809.
-            long artifactLastModified =
-                    
Files.getLastModifiedTime(packagedArtifactFile.toPath()).toMillis();
-
-            if (session.getProjectBuildingRequest().getBuildStartTime() != 
null) {
-                long buildStartTime =
-                        
session.getProjectBuildingRequest().getBuildStartTime().getTime();
-                if (artifactLastModified > buildStartTime) {
-                    return true;
-                }
-            }
-
-            Iterator<Path> iterator = outputFiles.iterator();
-            while (iterator.hasNext()) {
-                Path outputFile = iterator.next();
-
-                if (Files.isDirectory(outputFile)) {
-                    continue;
-                }
-
-                long outputFileLastModified =
-                        Files.getLastModifiedTime(outputFile).toMillis();
-                if (outputFileLastModified > artifactLastModified) {
-                    File alternative = 
determineBuildOutputDirectoryForArtifact(project, artifact);
-                    if (alternative != null) {
-                        LOGGER.warn(
-                                "File '{}' is more recent than the packaged 
artifact for '{}'; using '{}' instead",
-                                relativizeOutputFile(outputFile),
-                                project.getArtifactId(),
-                                relativizeOutputFile(alternative.toPath()));
-                    } else {
-                        LOGGER.warn(
-                                "File '{}' is more recent than the packaged 
artifact for '{}'; "
-                                        + "cannot use the build output 
directory for this type of artifact",
-                                relativizeOutputFile(outputFile),
-                                project.getArtifactId());
-                    }
-                    return false;
+        for (Artifact artifact : artifacts) {
+            if (artifact.getFile() != null && artifact.getFile().isFile()) {
+                Path target = getArtifactPath(artifact);
+                try {
+                    Files.createDirectories(target.getParent());
+                    Files.copy(artifact.getFile().toPath(), target, 
StandardCopyOption.REPLACE_EXISTING);

Review Comment:
   At debug level ? Or did you think about log level ?



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