Bug 98562

I am not sure if this should go here as well (please tell me whether I should open another bug for that). 

I am running KDE5 on Arch Linux and cannot xdg-settings set default-web-browser either.

Running with XDG_UTILS_DEBUG_LEVEL=3 I obtained:

> $ xdg-settings set default-web-browser chromium-browser.desktop
> Running KDE trader query "text/html" mimetype and "Application" servicetype
> make_default_kde: No kde runtime detected
> make_default_generic chromium-browser.desktop text/html
> Updating /home/username/.local/share/applications/mimeapps.list
> Running KDE trader query "text/html" mimetype and "Application" servicetype
> make_default_kde: No kde runtime detected
> make_default_generic userapp-Firefox-65I9HY.desktop text/html
> Updating /home/username/.local/share/applications/mimeapps.list

I dug a bit deeper into this and noticed, that xdg-mime still has some parts which are not aware of KDE 5. I attached a patch which does some superficial fixes but it is not working although the output changed:

> $ xdg-settings set default-web-browser chromium.desktop
> Running KDE trader query "text/html" mimetype and "Application" servicetype
> make_default_kde chromium.desktop text/html
> Updating /home/username/.local/share/applications//mimeapps.list
> kbuildsycoca5 running...
> Reusing existing ksycoca
> Recreating ksycoca file ("/home/username/.cache/ksycoca5_de_<redacted>", version 303)
> Still in the time dict (i.e. deleted files) ("apps")
> Menu "applications-kmenuedit.menu" not found.
> Saving
> make_default_generic chromium.desktop text/html
> Updating /home/username/.local/share/applications/mimeapps.list
> Running KDE trader query "text/html" mimetype and "Application" servicetype
> make_default_kde userapp-Firefox-65I9HY.desktop text/html
> Updating /home/username/.local/share/applications//mimeapps.list
> kbuildsycoca5 running...
> Reusing existing ksycoca
> Recreating ksycoca file ("/home/username/.cache/ksycoca5_de_<redacted>", version 303)
> Still in the time dict (i.e. deleted files) ("apps")
> Menu "applications-kmenuedit.menu" not found.
> Saving
> make_default_generic userapp-Firefox-65I9HY.desktop text/html
> Updating /home/username/.local/share/applications/mimeapps.list

Created attachment 127764 [details] [review]
The superficial patch for KDE 5 support

After having read https://wiki.archlinux.org/index.php/Default_applications#XDG_standard I symlinked as follows:

> $ ln -s ~/.local/share/applications/mimeapps.list ~/.config/mimeapps.list

And it seems to work now. As can be seen from the logs, xdg-settings changed ~/.local/share/applications/mimeapps.list while xdg-mime query reads ~/.config/mimeapps.list via ktraderclient5.

I've tracked down the issue, not sure how to solve it yet, desktop_file_to_binary treats filenames with a - in the format vendor-app.desktop so it is searching for browser.desktop in the chromium directory and failing. If "-" shouldn't be allowed in the desktop file filename there is a large number of broken files on this openSUSE Tumbleweed system, if they are allowed then desktop_file_to_binary needs fixing, i'll raise this on the xdg mailing list

find -iname "*-*"                                                                [Mon Nov  7 14:01:25 ACDT 2016|0]
./YaST2/samba-server.desktop
./YaST2/services-manager.desktop
./YaST2/iscsi-client.desktop
./YaST2/relocation-server.desktop
./YaST2/virtualization-config.desktop
./YaST2/add-on.desktop
./YaST2/yast-language.desktop
./YaST2/samba-client.desktop
./YaST2/auth-client.desktop
./YaST2/ntp-client.desktop
./YaST2/http-server.desktop
./kde4/active-documentviewer_chm.desktop
./kde4/active-documentviewer_comicbook.desktop
./kde4/active-documentviewer_djvu.desktop
./kde4/active-documentviewer_dvi.desktop
./kde4/active-documentviewer_epub.desktop
./kde4/active-documentviewer_fax.desktop
./kde4/active-documentviewer_fb.desktop
./kde4/active-documentviewer_ghostview.desktop
./kde4/active-documentviewer_ooo.desktop
./kde4/active-documentviewer_pdf.desktop
./kde4/active-documentviewer_plucker.desktop
./kde4/active-documentviewer_tiff.desktop
./kde4/active-documentviewer_txt.desktop
./kde4/active-documentviewer_xps.desktop
./textmaker-free.desktop
./planmaker-free.desktop
./presentations-free.desktop
./gtk-recordmydesktop.desktop
./yast2-metapackage-handler-ymu.desktop
./yast2-metapackage-handler.desktop
./claudia-launcher.desktop
./projectM-jack.desktop
./git-gui.desktop
./simple-scan.desktop
./vivaldi-stable.desktop
./lxqt-config-powermanagement.desktop
./lxqt-config-session.desktop
./lxqt-hibernate.desktop
./lxqt-leave.desktop
./lxqt-lockscreen.desktop
./lxqt-logout.desktop
./lxqt-reboot.desktop
./lxqt-shutdown.desktop
./lxqt-suspend.desktop
./lxqt-config-notificationd.desktop
./lxqt-about.desktop
./lxqt-config-appearance.desktop
./lxqt-config-brightness.desktop
./lxqt-config-file-associations.desktop
./lxqt-config-input.desktop
./lxqt-config-locale.desktop
./lxqt-config-monitor.desktop
./lxqt-config.desktop
./lxqt-config-globalkeyshortcuts.desktop
./pcmanfm-qt-desktop-pref.desktop
./pcmanfm-qt.desktop
./chromium-bsu.desktop
./gnome-mimeapps.list
./pavucontrol-qt.desktop
./notification-daemon.desktop
./gnome-calculator.desktop
./geoclue-where-am-i.desktop
./gpk-prefs.desktop
./bluetooth-sendto.desktop
./uget-gtk.desktop
./gcr-prompter.desktop
./mount-archive.desktop
./nautilus-autorun-software.desktop
./nautilus-classic.desktop
./gcm-calibrate.desktop
./gcm-import.desktop
./gcm-picker.desktop
./gcr-viewer.desktop
./lximage-qt-screenshot.desktop
./lximage-qt.desktop
./ibus-setup.desktop
./xscreensaver-properties.desktop
./exo-file-manager.desktop
./exo-mail-reader.desktop
./exo-preferred-applications.desktop
./exo-terminal-emulator.desktop
./exo-web-browser.desktop
./itweb-settings.desktop
./xfce4-power-manager-settings.desktop
./xfce4-about.desktop
./xfce4-screenshooter.desktop
./claws-mail.desktop
./system-config-printer.desktop
./gnome-background-panel.desktop
./gnome-bluetooth-panel.desktop
./gnome-control-center.desktop
./gnome-datetime-panel.desktop
./gnome-display-panel.desktop
./gnome-info-panel.desktop
./gnome-keyboard-panel.desktop
./gnome-mouse-panel.desktop
./gnome-network-panel.desktop
./gnome-notifications-panel.desktop
./gnome-power-panel.desktop
./gnome-printers-panel.desktop
./gnome-privacy-panel.desktop
./gnome-region-panel.desktop
./gnome-search-panel.desktop
./gnome-sharing-panel.desktop
./gnome-sound-panel.desktop
./gnome-universal-access-panel.desktop
./gnome-user-accounts-panel.desktop
./gnome-wacom-panel.desktop
./gnome-online-accounts-panel.desktop
./gnome-color-panel.desktop
./gnome-shell-extension-prefs.desktop
./evolution-calendar.desktop
./chromium-browser.desktop
./org.kde.krusader.root-mode.desktop
./yast2-packager.desktop
./audio-assistant.desktop
./gtk3-icon-browser.desktop
./gtk3-demo.desktop
./gtk3-widget-factory.desktop
./gkbd-keyboard-display.desktop
./nm-connection-editor.desktop
./nm-applet.desktop
./vivaldi-snapshot.desktop

According to the xdg specs (and my understanding), use of the vendor prefix means that

foo/bar.desktop
foo-bar.desktop

should be treated as equivalent.  This code probably should too.

Sorry, so .... in short , use of - in filenames *should* be ok (and allowed)

Ok i'll patch desktop_file_to_binary to search for /usr/share/applications/foo-bar.desktop after its searched for /usr/share/applications/foo/bar.desktop (As an example)

Turns out the issue I was seeing was a regression in my fix for https://bugs.freedesktop.org/show_bug.cgi?id=44163 that never got upstreamed, i'll leave this ticket open as the kde patch is separate to this.

fyi, applied fixes from bug #44163 now, any news/update here?

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