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https://issues.apache.org/jira/browse/COMPRESS-400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16039474#comment-16039474
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Simon Spero edited comment on COMPRESS-400 at 6/6/17 7:27 PM:
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1. Should the appropriate method names be changed to from extra to either ext
or extended? I was thinking of them as extra (to the ones already processed),
and so mentally expanded exthdr to extra, contra PAX regem.
2. Should I add methods to TarArchiveOutputStream to allow setting global
extended headers to be emitted in a global header record when the next header
set is pushed?
3. Should I change TarArchiveInputStream to propagate input global extended
header values to each entry?
4. Should I look to see if some of this API work could be generalized to the
generic Archive API interfaces?
was (Author: sesuncedu):
1. Should the appropriate method names be changed to from extra to either ext
or extended? I was thinking of them as extra (to the ones already processed),
and so mentally expanded exthdr to extra, contra PAX regem.
2. Should I add methods to TarArchiveOutputStream to allow setting global
extended headers to be emitted in a global header record when the next header
set is pushed?
3. Should I change TarArchiveInputStream to propagate input global extended
header values to each entry?
> 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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