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POWhy does maven-resources-plugin copy files multiple times (appfuse-basic-spring-archetype v2.1.0)
 

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  1. POWhy does maven-resources-plugin copy files multiple times (appfuse-basic-spring-archetype v2.1.0)
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    <p>When successfully running <code>&gt;mvn package</code> on an appfuse-basic-spring-archetype v2.1.0 project, the console output displays:</p> <pre><code>[INFO] --- maven-resources-plugin:2.5:resources (default-resources) @ ScanillionAppTier02 --- [debug] execute contextualize [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] Copying 20 resources [INFO] Copying 16 resources [INFO] Copying 16 resources [INFO] Copying 16 resources </code></pre> <p>I direct your attention to the last 3 lines (Copying 16...). I ran <code>&gt;mvn -X package</code> to get DEBUG output, which shows that the resources plugin claims to be first filtering the 16 files and then copying them twice.</p> <p>Even more copies happen within the forked hibernate3-maven-plugin:hbm2ddl portion of the build; in that section, the output shows the 16 files being filtered once and copied 4 times.</p> <p>Again, the build works, so I could have (should have?) counted my blessings, averted my eyes, and got on with my project. Alas, I went down this rat hole and it's going to bug me until I get an answer. Help a guy get some sleep. :-)</p> <p>EDIT 3/19/2012 cdhabecker: more detail</p> <p>In the maven output with the -X option, I found this:</p> <pre><code>[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-resources-plugin:2.5:resources' with basic configurator --&gt; [DEBUG] (f) buildFilters = [] [DEBUG] (f) encoding = UTF-8 [DEBUG] (f) escapeWindowsPaths = true [DEBUG] (s) includeEmptyDirs = false [DEBUG] (s) outputDirectory = C:\eclipse\workspace\foo\target\classes [DEBUG] (s) overwrite = false [DEBUG] (f) project = MavenProject: com.foo:foo:0.0.1-SNAPSHOT @ C:\eclipse\workspace\foo\pom.xml [LOOK] (s) resources = [Resource {targetPath: null, filtering: true, FileSet {directory: C:\eclipse\workspace\foo\src\main\resources, PatternSet [includes: {}, excludes: {ApplicationResources*.properties}]}}, [LOOK] Resource {targetPath: null, filtering: true, FileSet {directory: C:\eclipse\workspace\foo\target\resources, PatternSet [includes: {}, excludes: {}]}}, [LOOK] Resource {targetPath: null, filtering: false, FileSet {directory: C:\eclipse\workspace\foo\target\resources, PatternSet [includes: {}, excludes: {}]}}, [LOOK] Resource {targetPath: null, filtering: false, FileSet {directory: C:\eclipse\workspace\foo\target\resources, PatternSet [includes: {}, excludes: {}]}}] [DEBUG] (f) session = org.apache.maven.execution.MavenSession@eddac [DEBUG] (f) supportMultiLineFiltering = false [DEBUG] (f) useBuildFilters = true [DEBUG] (s) useDefaultDelimiters = true [DEBUG] -- end configuration -- </code></pre> <p>If you look at the lines marked [LOOK], you'll see that maven-resources thinks that it has 4 tasks (the filter of 20 files, the filter of 16 files, and the 2 redundant copies of those 16 files).</p> <p>So now I suspect that something (e.g., native2ascii-maven-plugin or other plugins or the maven build plan generator) is registering those tasks with maven-resources-plugin and that nothing in the system is bothering to notice that some of those tasks are redundant.</p>
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