Everything I mentioned so far has been my Bionic desktop. Which,
incidentally was an upgrade from Xenial, not a clean install. But... in
my Focal headless container, if I run:
>$ run-mailcap myscript
it invokes emacs. Yay! It works! DISPLAY, EDITOR, and VISUAL are all
unset or empty. There's nothing in /etc/mailcap for emacs, and what
*IS* in /etc/mailcap is (amongst others of course):
application/x-shellscript; vim %s; needsterminal
So I really need to spend some time reading man pages about mailcap,
mime, etc because that's not what I would expect, and I'm really confused.
On 5/23/22 8:59 AM, Craig STCR wrote:
I guess maybe I should have given a little better description of what
I tried that did NOT work? But it's a little off-topic for this
mailing list. Nevertheless, here it is...
I created a ~/.mailcap file and put this in it, which I cut and pasted
from /etc/mailcap:
application/x-shellscript; emacs27 %s; test=test -n "$DISPLAY"
But obviously that's not going to change anything, since it's already
in the system mailcap file, /etc/mailcap. DOH! And sure enough,
running '>$ run-mailcap myscript' invokes 'less'. But what I wasn't
expecting is that running '>$ update-mime -- local' gives me: "Error:
'/home/user/.mailcap' is not in required format -- not updated". Not
sure why I'm getting that when I cut-and-pasted from /etc/mailcap.
No worries. I'll look in more depth later.
On 5/23/22 8:40 AM, Craig STCR wrote:
Thanks all for your help!
On 5/20/22 9:44 PM, Ihor Radchenko wrote:
Dear Craig, ... or provide plain/text handler in ~/.mailcap.
OK, I did a first-try on this and was unsuccessful, but I'm sure it's
user error. I need to refresh my knowledge on how to customize
user-local mime database, and that will write-out a new ~/.mailcap,
etc, I think? I've done it before, but it was awhile ago, and I
wasn't paying attention to ~/.mailcap when I did it. I know for
Gnome I can create a .desktop file. But I know there's a way to
customize user-local mime database without Gnome desktop. I'll take
a closer look when I have a little more time.
On 5/20/22 9:44 PM, Ihor Radchenko wrote:
However, I am not sure what to do on Windows/Mac.
Maybe try a quick-and-dirty, cross-platform solution that checks
non-binary files for a first-line shebang? Could use existing Emacs
hooks that determine major-mode when opening files.
Again, thanks all for your help!
Best,
-Craig