Re: [DISCUSSION, default settings] Using mailcap as default handler for opening file links

[Max Nikulin]

On 07/06/2022 00:47, Bhavin Gandhi wrote:
> On Mon, 6 Jun 2022 at 19:09, Max Nikulin <manikulin@gmail.com> wrote:
> > P.P.S. I had a hope that recent Fedora-36 release has Emacs-28 packaged,
> > so it would be possible to test live image in qemu to quickly check
> > behavior in full-fledged desktop environment, but version 27 is really
> > packaged there.
> I think we will have Emacs 28 in Fedora 37 (that's because major changes
> are not introduced in beta/released versions)[1].
I have noticed your activity in search results but finally I decided to 
revive existing minimal LXC container with Arch.
> I can test the Emacs 28 + Fedora 36 combination, if you give me steps to
> perform. Sorry, I don't have full context on how MIME type stuff applies
> to Org mode etc., so I can try the steps and report back the behavior.
Thank you for offering a hand. Actually there are too many variables to 
ask for particular actions. I was trying various functions and stepping 
through them in debugger having side by side windows of Emacs-26 from 
Ubuntu-20.04 and Emacs-28 from ArchLinux (Emacs-27 has a bug in 
mailcap.el rather serious in this case). Content of /etc/mime.types 
(e.g. shell script definitions) and /etc/mailcap (presence of */* less 
%s) varies in Linux distributions, `mailcap-mime-apps' is not the only 
map of handlers withing Emacs, `org-open-file' uses `auto-mode-alist' 
and `org-file-apps'...
It is even more off-topic here, but since packaging Emacs for next 
Fedora has been mentioned, I have another question. To test my patches 
for Org I have LXC containers with various versions of Ubuntu and 
installing Emacs there pulls reasonable amount of X11 libraries. Several 
months ago I tried to install Emacs in a Fedora-35 container. I gave up 
because of enormous amount of requirements including wayland, libraries 
related to hardware acceleration and maybe even drivers. Often I do not 
mount /dev/dri inside containers, so a lot of packages were completely 
useless for me. Amount of required libraries in Arch is not so huge.