tar file-name-handler

tar file-name-handler

[Stefan Monnier]

I remember an announcement recently that a file-name-handler was now
available for tar archives, and wanted to try it out, but can't seem to
find it.

Did I dream it?


        Stefan

Re: tar file-name-handler

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Fri, 02 Feb 2018 09:04:04 -0500
> 
> I remember an announcement recently that a file-name-handler was now
> available for tar archives, and wanted to try it out, but can't seem to
> find it.
> 
> Did I dream it?

Not a dream.  From NEWS on master:

  ** Emacs can now visit files in archives as if they were directories.
  This feature uses Tramp and works only on systems which support GVFS,
  i.e. GNU/Linux, roughly spoken.  See the chapter "(tramp) Archive file
  names" in the Tramp manual for full documentation of these facilities.

Re: tar file-name-handler

[Michael Albinus]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

Hi Stefan,

> I remember an announcement recently that a file-name-handler was now
> available for tar archives, and wanted to try it out, but can't seem to
> find it.

It's tramp-archive.el. You don't need to configure anything, just do
"C-x C-f /path/to/file.tar/"

> Did I dream it?

No :-)

>         Stefan

Best regards, Michael.

Re: tar file-name-handler

[Stefan Monnier]

> It's tramp-archive.el.

I see it now, thanks.  Works like a charm so far.

> You don't need to configure anything, just do
> "C-x C-f /path/to/file.tar/"

Hmm... I had to manually load `tramp` before this worked!


        Stefan

Re: tar file-name-handler

[Michael Albinus]

Stefan Monnier <monnier@IRO.UMontreal.CA> writes:

>> You don't need to configure anything, just do
>> "C-x C-f /path/to/file.tar/"
>
> Hmm... I had to manually load `tramp` before this worked!

Ahh, yes. I do not add the entry into file-name-handler-alist yet during
autoload. Maybe we could add this, once it has been stabilized.

Have you tried the examples from the Tramp manual?

>         Stefan

Best regards, Michael

Re: tar file-name-handler

[Stefan Monnier]

> Ahh, yes. I do not add the entry into file-name-handler-alist yet during
> autoload. Maybe we could add this, once it has been stabilized.

Maybe adding it right away will help it stabilize?


        Stefan

Re: tar file-name-handler

[Michael Albinus]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> Ahh, yes. I do not add the entry into file-name-handler-alist yet during
>> autoload. Maybe we could add this, once it has been stabilized.
>
> Maybe adding it right away will help it stabilize?

Done.

>         Stefan

Best regards, Michael.

Re: tar file-name-handler

[Eli Zaretskii]

> From: Michael Albinus <michael.albinus@gmx.de>
> Date: Sat, 03 Feb 2018 13:25:43 +0100
> Cc: emacs-devel@gnu.org
> 
> Stefan Monnier <monnier@iro.umontreal.ca> writes:
> 
> >> Ahh, yes. I do not add the entry into file-name-handler-alist yet during
> >> autoload. Maybe we could add this, once it has been stabilized.
> >
> > Maybe adding it right away will help it stabilize?
> 
> Done.

First problem, unrelated to "stability": visiting a tar file on
MS-Windows now displays an error message:

  Error: (user-error "Package `tramp-archive' not supported")

although the archive is parsed correctly.  And Tramp is loaded as
result of visiting a Tar file, although it's unneeded and unhelpful.

Re: tar file-name-handler

[Michael Albinus]

Eli Zaretskii <eliz@gnu.org> writes:

Hi Eli,

> First problem, unrelated to "stability": visiting a tar file on
> MS-Windows now displays an error message:
>
>   Error: (user-error "Package `tramp-archive' not supported")
>
> although the archive is parsed correctly.  And Tramp is loaded as
> result of visiting a Tar file, although it's unneeded and unhelpful.

There is the new test `tramp-archive-test42-delay-load', which shall
check that this doesn't happen. Well, needs improvement. Will do.

Best regards, Michael.

Re: tar file-name-handler

[Michael Albinus]

Eli Zaretskii <eliz@gnu.org> writes:

> First problem, unrelated to "stability": visiting a tar file on
> MS-Windows now displays an error message:
>
>   Error: (user-error "Package `tramp-archive' not supported")
>
> although the archive is parsed correctly.  And Tramp is loaded as
> result of visiting a Tar file, although it's unneeded and unhelpful.

There was an error in `locate-dominating-file', which did expand FILE
even if it wasn't a directory. Due to this, your tar file "foo.tar" was
expanded to "foo.tar/". I've fixed this, and I've also added some code
which shall prevent loading tramp-archive (and the whole Tramp then)
when it doesn't make sense.

Pushed to master.

Best regards, Michael.

Re: tar file-name-handler

[Eli Zaretskii]

> From: Michael Albinus <michael.albinus@gmx.de>
> Cc: monnier@iro.umontreal.ca,  emacs-devel@gnu.org
> Date: Sat, 03 Feb 2018 18:54:25 +0100
> 
> >   Error: (user-error "Package `tramp-archive' not supported")
> >
> > although the archive is parsed correctly.  And Tramp is loaded as
> > result of visiting a Tar file, although it's unneeded and unhelpful.
> 
> There was an error in `locate-dominating-file', which did expand FILE
> even if it wasn't a directory. Due to this, your tar file "foo.tar" was
> expanded to "foo.tar/". I've fixed this, and I've also added some code
> which shall prevent loading tramp-archive (and the whole Tramp then)
> when it doesn't make sense.
> 
> Pushed to master.

Thanks, works for me.