[Bug debuginfod/27867] New: Support ostree archive format (.filez)

[akitouni at gnome dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27867

            Bug ID: 27867
           Summary: Support ostree archive format (.filez)
           Product: elfutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: debuginfod
          Assignee: unassigned at sourceware dot org
          Reporter: akitouni at gnome dot org
                CC: elfutils-devel at sourceware dot org
  Target Milestone: ---

debuginfod supports a few archive formats. It would be nice to support ostree
archive files too. ostree is used by a few 

They have the .filez extension and have the following format: (I don't think it
is documented, but it is stable and can be seen in the code
https://github.com/ostreedev/ostree/blob/main/src/libostree/ostree-core.c#L475)

4 bytes header length (big endian)
4 bytes padding
header
content (deflate compressed without the zlib header)

So one should be able to read the header length, skip the padding and header
and read (and decompress) the contents.

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