bug#12932: 24.2; Installing GNOME .desktop file to incorrect location

bug#12932: 24.2; Installing GNOME .desktop file to incorrect location

[markskilbeck]

When compiling and installing Emacs, the GNOME .desktop file is
installed to /usr/local/share/applications; however, according to the
documentation[1], the correct locations are: /usr/share/applications and
~/.local/share/applications. As such, GNOME[-shell] does not allow
opening Emacs through means other than using $PATH.

-- mgsk


In GNU Emacs 24.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.4.2)
 of 2012-11-18 on earth
Windowing system distributor `The X.Org Foundation', version 11.0.11103000
Configured using:
 `configure '--with-x-toolkit=gtk3''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Fundamental

Minor modes in effect:
  yas/global-mode: t
  show-paren-mode: t
  shell-dirtrack-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
M-x r e p o r t <tab> <return>

Recent messages:
Loading em-hist...done
Loading em-ls...done
Loading em-prompt...done
Loading em-script...done
Loading em-term...done
Loading em-unix...done
Loading /home/mgsk/.emacs.d/config-eshell.el (source)...done
Loading /home/mgsk/.emacs.d/config-package.el (source)...done
Loading /home/mgsk/.emacs.d/config-css.el (source)...done
For information about GNU Emacs and the GNU system, type C-h C-a.

Load-path shadows:
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/home/mgsk/.emacs.d/elpa/org-20120610/org-gnus hides /usr/local/share/emacs/24.2/lisp/org/org-gnus
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/home/mgsk/.emacs.d/elpa/org-20120610/org-taskjuggler hides /usr/local/share/emacs/24.2/lisp/org/org-taskjuggler
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bug#12932: 24.2; Installing GNOME .desktop file to incorrect location

[Glenn Morris]

markskilbeck@gmail.com wrote:

> When compiling and installing Emacs, the GNOME .desktop file is
> installed to /usr/local/share/applications; however, according to the
> documentation[1],

Reference [1] seems to be missing AFAICS.

>  the correct locations are: /usr/share/applications and
> ~/.local/share/applications.

Thanks for the report. My initial reaction, without having read the
Gnome docs, is that this is a Gnome bug (obviously this won't be a
helpful response for you). If I compile something with --prefix=/foo, I
get annoyed if it installs files outside /foo.

Installing in /usr/share/applications is a definite no-go, because then
we could clobber a pre-existing emacs.desktop belonging to the system.
I supposed we could perhaps only install here if there was not already
an emacs.desktop, but this does not seem like a great solution to me.

Installing in ~ is pointless, because it only works for the installing
user (doubly bad if this is root). You could of course make your own
symlink there to the /foo file, so perhaps what Emacs does now is a
reasonable compromise.

bug#12932: 24.2; Installing GNOME .desktop file to incorrect location

[Glenn Morris]

I guess we could add an explicit configure option for where the desktop
file will be installed ($desktopdir in current Makefile), and leave the
default as it is now. I doubt the option will see much use though.

But the freedesktop spec does mention (obliquely) /usr/local:

http://specifications.freedesktop.org/menu-spec/menu-spec-latest.html

Install Locations

    If an application is intended to be installed by root on a system
    wide basis then /usr/share is recommended to be used as value for
    datadir and /etc/xdg is recommended to be used as value for
    sysconfdir. In case the /usr/share hierarchy is not writable it is
    recommended to use /usr/local/share as value for datadir instead.
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

So, again, it seems like a Gnome bug to me if it doesn't check in
/usr/local as well as /usr (I didn't check whether or not it actually does).

See also

  http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html

  If $XDG_DATA_DIRS is either not set or empty, a value equal to
  /usr/local/share/:/usr/share/ should be used.

Maybe your XDG_DATA_DIRS is set wrongly?


Of course, this doesn't help people who install with --prefix != /usr/local

bug#12932: 24.2; Installing GNOME .desktop file to incorrect location

[Stefan Monnier]

tags 12932 notabug
thanks

> So, again, it seems like a Gnome bug to me if it doesn't check in
> /usr/local as well as /usr (I didn't check whether or not it actually
> does).

Yes, tho I don't care if we should consider it as a bug in Gnome or what
else, but the behavior is correct.
If the user wants to install into /usr, then she should use "--prefix=/usr".


        Stefan

bug#12932: 24.2; Installing GNOME .desktop file to incorrect location

[Mark Skilbeck]

On Mon, Nov 19, 2012 at 12:09:39PM -0500, Glenn Morris wrote:
> markskilbeck@gmail.com wrote:
> 
> > When compiling and installing Emacs, the GNOME .desktop file is
> > installed to /usr/local/share/applications; however, according to the
> > documentation[1],
> 
> Reference [1] seems to be missing AFAICS.
> 
> >  the correct locations are: /usr/share/applications and
> > ~/.local/share/applications.
> 
> Thanks for the report. My initial reaction, without having read the
> Gnome docs, is that this is a Gnome bug (obviously this won't be a
> helpful response for you). If I compile something with --prefix=/foo, I
> get annoyed if it installs files outside /foo.
> 
> Installing in /usr/share/applications is a definite no-go, because then
> we could clobber a pre-existing emacs.desktop belonging to the system.
> I supposed we could perhaps only install here if there was not already
> an emacs.desktop, but this does not seem like a great solution to me.
> 
> Installing in ~ is pointless, because it only works for the installing
> user (doubly bad if this is root). You could of course make your own
> symlink there to the /foo file, so perhaps what Emacs does now is a
> reasonable compromise.

Apologies on the missing reference. Here it is: 

http://developer.gnome.org/integration-guide/stable/desktop-files.html.en

The relevant part is:

  Place this file in the /usr/share/applications directory so that it
  is accessible by everyone, or in ~/.local/share/applications if you
  only wish to make it accessible to a single user ...

However, I don't know if these are the only paths used--I will have to
confirm with GNOME developers.

-- mgsk (replying from a different email address)