[Bug find-debuginfo/30097] New: Q: why find-debuginfo script uses cpio?

[Bug find-debuginfo/30097] New: Q: why find-debuginfo script uses cpio?

[kloczko.tomasz at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30097

            Bug ID: 30097
           Summary: Q: why find-debuginfo script uses cpio?
           Product: debugedit
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: find-debuginfo
          Assignee: unassigned at sourceware dot org
          Reporter: kloczko.tomasz at gmail dot com
                CC: debugedit at sourceware dot org
  Target Milestone: ---

Trying to minimize base build build env I found that only package which needs
cpio  is find-debuginfo scipt.
I have difficulty ith understandig why it needed to try to remove that
dependency.

Is it reall ynecessary to use cpio in this case?

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[Bug find-debuginfo/30097] Q: why find-debuginfo script uses cpio?

[pmatilai at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30097

Panu Matilainen <pmatilai at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |pmatilai at redhat dot com

--- Comment #1 from Panu Matilainen <pmatilai at redhat dot com> ---
Historical reasons? The cpio use was there already in the first-ever version in
2007 by Roland McGrath.

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[Bug find-debuginfo/30097] Q: why find-debuginfo script uses cpio?

[mark at klomp dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30097

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mark at klomp dot org

--- Comment #2 from Mark Wielaard <mark at klomp dot org> ---
(In reply to kloczek from comment #0)
> Trying to minimize base build build env I found that only package which
> needs cpio  is find-debuginfo scipt.
> I have difficulty ith understandig why it needed to try to remove that
> dependency.
> 
> Is it reall necessary to use cpio in this case?

It is just an convenient way to package up a bunch of files.
It could be replaced with any other packaging system.
cpio is just known to always be there.

What would you suggest instead? And do you have a working patch?

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[Bug find-debuginfo/30097] Q: why find-debuginfo script uses cpio?

[kloczko.tomasz at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30097

--- Comment #3 from kloczek <kloczko.tomasz at gmail dot com> ---
Issue is that cpio is minimal build env is required only by thy part.

IMO it would be better to use tar because tar is usually used in %prep.

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[Bug find-debuginfo/30097] Q: why find-debuginfo script uses cpio?

[pmatilai at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30097

--- Comment #4 from Panu Matilainen <pmatilai at redhat dot com> ---
> cpio is just known to always be there.

Note that rpm itself does not use the external cpio command for anything at
all. The only reason rpm-build in Fedora depends on cpio is because nobody
thought to remove the dependency when the debuginfo-stuff got split.

While we've come to expect to cpio being always there, few packages actually
depend on it.

I'm not arguing for replacing, cpio is tiny enough that it hardly matters at
all. Just FWIW.

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[Bug find-debuginfo/30097] Q: why find-debuginfo script uses cpio?

[mark at klomp dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30097

--- Comment #5 from Mark Wielaard <mark at klomp dot org> ---
In my experience cpio is more common than tar.
And the format seems more stable than that of tar.
Because that cpio in POSIX is replaced by pax,
which does support the cpio format (and ustar).
Maybe we should use pax instead?

I am not going to work it, but patches welcome if someone feels this is
important.

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[Bug find-debuginfo/30097] Q: why find-debuginfo script uses cpio?

[kloczko.tomasz at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30097

--- Comment #6 from kloczek <kloczko.tomasz at gmail dot com> ---
> In my experience cpio is more common than tar.

This is not about coder experience.
None of the source archives are cpio.{gz|xz|bz2}.
Almost all of them are tar.{gz|xz|bz2}.

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