[MNG-4368] DefaultArtifactInstaller should only overwrite files if ti…

…mestamp has changed o Revised to install upon any difference in file timestamp or length git-svn-id: https://svn.apache.org/repos/asf/maven/maven-3/trunk@894114 13f79535-47bb-0310-9956-ffa450edef68
mkristian · Dec 27, 2009 · 9d13758 · 9d13758
1 parent fa63300
commit 9d13758
Showing 1 changed file with 13 additions and 1 deletion.
diff --git a/maven-compat/src/main/java/org/apache/maven/artifact/installer/DefaultArtifactInstaller.java b/maven-compat/src/main/java/org/apache/maven/artifact/installer/DefaultArtifactInstaller.java
@@ -82,7 +82,19 @@ public void install( File source, Artifact artifact, ArtifactRepository localRep
 
             getLogger().info( "Installing " + source.getPath() + " to " + destination );
 
-            FileUtils.copyFileIfModified( source, destination );
+            boolean copy =
+                !destination.exists() || "pom".equals( artifact.getType() )
+                    || source.lastModified() != destination.lastModified() || source.length() != destination.length();
+
+            if ( copy )
+            {
+                FileUtils.copyFile( source, destination );
+                destination.setLastModified( source.lastModified() );
+            }
+            else
+            {
+                getLogger().debug( "Skipped re-installation of " + destination + ", seems unchanged" );
+            }
 
             // must be after the artifact is installed
             for ( ArtifactMetadata metadata : artifact.getMetadataList() )