AbstractZipArchiver no longer respects recompressAddedZips

[philwebb]

When setting AbstractZipArchiver.recompressAddedZips to false already compressed entries should be added using the ZipEntry.STORED method. Unfortunately this doesn't appear to be the case.

The following can be added to ZipArchiverTest to demonstrate the issue.

    public void testDontRecompressAddedZips() throws Exception {
         final File srcDir = new File( "src/test/resources" );
         final File zipFile = new File( "target/output/dont-recompress-added-zips.zip" );
         ZipArchiver zipArchiver = getZipArchiver( zipFile );
         zipArchiver.setRecompressAddedZips(false);
         String[] includes = { "test.zip" };
         zipArchiver.addDirectory( srcDir, includes, FileUtils.getDefaultExcludes() );
         zipArchiver.setEncoding( "UTF-8" );
         FileUtils.removePath( zipFile.getPath() );
         zipArchiver.createArchive();
         final ZipFile zf = new ZipFile( zipFile );
         assertEquals( ZipEntry.STORED, zf.getEntry("test.zip").getMethod() );
         zf.close();
	}

The root cause appears to be due to changes introduced in 1ddd40b which push the header detection logic down to wrappedRecompressor.

Unfortunately this doesn't work because ConcurrentJarCreator.addArchiveEntry stores the mode at the time that then entry was added and ignores any subsequent updates. You can see this by adding a breakpoint in the constructor of ZipArchiveEntryRequest and another in ZipArchiveEntryRequest.getMethod().

[philwebb]

Incidentally this bug manifests itself in maven-assembly-plugin v3.0 and is unfortunately quite critical with the creation of Spring Boot fat jars which rely on uncompressed entries.

[plamentotev]

Hi, Thank you for the detailed explanation. While this issue should be solved(I'll try to fix it ASAP), if you want the fat jar to contain only uncompresses entried maybe you could just set the whole jar compression level to STORE or you want to compress the non-jar entries?

…

On Nov 29, 2016 07:06, "Phil Webb" ***@***.***> wrote: Incidentally this bug manifests itself in maven-assembly-plugin v3.0 and is unfortunately quite critical with the creation of Spring Boot fat jars which rely on uncompressed entries. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#53 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AMLobcoo9UFxKwQB5mcn3biNNtUw8Q_Lks5rC7LOgaJpZM4K-kPK> .

[philwebb]

@plamentotev Unfortunately I don't think the maven-assembly-plugin surfaces that as an option.

This specific requirement allows us to generate Spring Boot fat jars which are a usually a mix of .class files and nested .jar files. Only the nested jars need to be stored uncompressed and ideally we'd like to keep compression for everything else.

[plamentotev]

@philwebb It provides such option in a bit obscure way. You could set arbitrary option of the archiver using archiverConfig (the assembly plugin will set it through reflection). For example the following configuration of the maven-assembly-plugin should do the trick:

<configuration>
    <recompressZippedFiles>false</recompressZippedFiles>
    <archiverConfig>
        <compress>false</compress>
    </archiverConfig>
</configuration>

It's a bit of a dirty hack as you want any non-zip files to be compresses but I hope it could help you until a proper fix is released.

[philwebb]

@plamentotev Excellent, thanks for the info!

[plamentotev]

Looks like that some changes in Apache Commons Compress are required in order to fix this issue. I've created an issue about them - https://issues.apache.org/jira/browse/COMPRESS-375

[snicoll]

@plamentotev the commons-compress issue has been solved, awesome! Do you have a timeline for a fix here? I am asking because it will have to be incorporated in the next maven-assembly-plugin.

[plamentotev]

@snicoll the fix is almost ready. It just needs a bit of polishing such as more test cases, javadocs, etc. Unfortunately I can't tell you when it could be merged into master as this depends on when the Apache Commons Compress 1.13 will be released.

My role in the Plexus Archiver project is not exactly known even to me 😄. Without going into too much details - I also don't know when a version of Plexus Archiver with the fix could be released. But I did ask about this issue on the Maven Developers list so once I receive an answer I'll let you know.

p.s. If you want you could take a look at the fix - I'm working on it on this branch. It is working but still work in progress.

[michael-o]

Hi guys, as soon as anyone of you has a decent PR without any regressions, I can merge it.

[plamentotev]

@michael-o thanks. I've created a PR. I don't think it's ready to be merged yet as it depends on not yet released version of Apache Commons Compress.

[michael-o]

Commons Compress has been upgraded to 1.14, please revalidate this issue.

[plamentotev]

It is still needed because the root cause is in Plexus Archiver. We needed newer version of Commons Compress to properly fix it. #55 fixes this issue. It's now re-based and ready to be merged.