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https://issues.apache.org/jira/browse/MSHARED-1285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17790895#comment-17790895
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ASF GitHub Bot commented on MSHARED-1285:
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laeubi commented on PR #77:
URL: https://github.com/apache/maven-filtering/pull/77#issuecomment-1831210021
@lalmeras many many thanks for looking into the test!
> So the issue for this test failure is in TestIncrementalBuildContext
(org.sonatype.plexus:plexus-build-api:tests). Not sure how to handle this.
This is actually deprecated/removed in later versions exactly because no one
can know what the test wants to assert... so the best would be to simply copy
it in the plugin here and adjust as needed, or even better using a mock.
> DefaultMavenResourcesFiltering uses BuildContext in a way that fails sometimes
> ------------------------------------------------------------------------------
>
> Key: MSHARED-1285
> URL: https://issues.apache.org/jira/browse/MSHARED-1285
> Project: Maven Shared Components
> Issue Type: Bug
> Reporter: Christoph Läubrich
> Priority: Major
>
> The maven resources plugin uses
> [https://github.com/apache/maven-filtering/blob/master/src/main/java/org/apache/maven/shared/filtering/DefaultMavenResourcesFiltering.java]
> to copy resources, but that component has some subtile flaws reported here:
> [https://github.com/eclipse-m2e/m2e-core/discussions/1468]
> The problematic part is the usage of BuildContext#newScanner that already
> mentions in the javadoc that passing ignoreDelta to neScanner might not
> reveal all required items +*for copy-resources*+ form A -> B and instead
> BuildContext#isUpTodate should be used.
> Just from a quick look I assume that part of code actually wants to use
> something like this:
> {code:java}
> DirectoryScanner ds = new DirectoryScanner() {
> @Override
> protected boolean isSelected(String name, File file) {
> if (file.isFile() && buildContext.isUptodate(getTargetFile(file), file))
> {
> return false;
> }
> return true;
> }
> };
> ds.setBasedir(basedir); {code}
> That way all the code that currently checks for if output directory existed
> before can also be removed what is another issue because it leads to a full
> resources copy even if source+target are already even if a single class file
> is changed while the idea seems more that if the output was not there it
> should not try to be incremental!
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