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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COMPRESS-400) It should be possible for users to create and access extra PAX headers to tar archives
Date Tue, 13 Jun 2017 21:45:00 GMT

    [ https://issues.apache.org/jira/browse/COMPRESS-400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16048448#comment-16048448
] 

ASF GitHub Bot commented on COMPRESS-400:
-----------------------------------------

Github user coveralls commented on the issue:

    https://github.com/apache/commons-compress/pull/31
  
    
    [![Coverage Status](https://:/builds/11956800/badge)](https://:/builds/11956800)
    
    Coverage increased (+0.1%) to 84.458% when pulling **ec06015710fc179ba58a546d02e6935d20825681
on sesuncedu:COMPRESS-400-REDUX** into **0d8ab18c86f4edb38a73de1512483bb5b876bb1f on apache:master**.



> It should be possible for users to create and access extra PAX headers to tar archives

> ---------------------------------------------------------------------------------------
>
>                 Key: COMPRESS-400
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-400
>             Project: Commons Compress
>          Issue Type: Improvement
>          Components: Archivers
>            Reporter: Simon Spero
>            Priority: Minor
>
> It is very useful to be able to add extra PAX headers to tar entries.  For example, a
tar file containing maven artifacts could have extra headers carrying the groupid, artifactid,
version, classifier, etc.  
> If the appropriate prefixes are used, these headers can be extracted to posix extended
attributes by gnu and bsdtar.
> This change requires adding a map to TarArchiveEntry to carry the extra headers, plus
modifications to the TarArchive*Stream to save unrecognized headers when reading, and to add
any extra headers when writing. 
> I have created a prototype implementation, but have not merged it into my fork of the
project.  I don't have full tests written, because I was using gnutar as an oracle.
>  I have also ignored the issue of writing values to standard headers like size, though
since the PAX specification states that doing things like setting size=100 (if the real size
is not in fact 100) is undefined, so I'm technically in compliance.  The temptation is  to
do what was asked, then on close pop up a "Were you sure?" dialog, but that's mean.  I guess
I could use this to set the appropriate entry fields if doing so makes sense, but the easiest
approach  is to block setting any headers that would be consumed by the tar implementation
when reading. 



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