Re: cpio-mode version 0.08

[Douglas Lewan <d.lewan2000@gmail.com>]

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On Tue, Jun 5, 2018 at 4:10 PM, Michael Albinus <michael.albinus@gmx.de>
wrote:

> Douglas Lewan <d.lewan2000@gmail.com> writes:
>
> > Michael,
>
> Hi Doug,
>
> > So far, I've downloaded source for emacs 26.1 and built it
> > (in a somewhat hobbled development environment -- no X development,
> > no image support, without gnutls).
> > I've loaded tramp and url-tramp and opened test files (with names
> > ending in '.cpio).
> > All I get is "File not found and directory is write-protected".
> >
> > I assume I'm missing something. Can you help?
>
> tramp-archive.el is new in Emacs 27 and Tramp 2.4. So you might use
> latest sources from either Emacs or Tramp repository.
>

Forgive me, but I don't know where the latest sources are.
People write of them, but don't give explicit references.


> > Also, a quick look suggests that libarchive may not be universally
> > available.  I'm a big fan of portability, if it's possible, so, if
> > that's the case, then I might prefer to avoid it. Any thoughts?
>
> Yes, that's a problem. Maybe we could do something like Emacs does for
> dired. Where applicable, it uses the external "ls" command, otherwise it
> uses the ls-lisp library.
>
> This means, we should use an Elisp implementation (like your cpio code)
> on systems which have no libarchive(3) support, for the cost of
> supporting less archive formats. The upper interface would still be a
> file name handler like tramp-archive provides as of today; all other
> packages using this wouldn't care the underlying implementation.
>

Seems reasonable. This would probably be a late addition for my cpio-mode,
but I'm more than willing to do it.
Does your tramp code allow for editing of archive entries and their
attributes?
That would be a necessary piece of guaranteeing a consistent user
experience.



-- 
,Doug
Douglas Lewan
(908) 720-7908
Member of the PKRA.

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