Remove GTK3 from phone images

[Timo Jyrinki]

This is a wishlist bug to eventually remove GTK3 from Ubuntu Phone images to save some space.

===TODO===

-- address-book-service --

address-book-service depends on evolution-data-server, which depends on GTK3. evolution-data-server further depends on libgweather-3-6 and libgcr-ui-3-1 which both directly depend on GTK3 too.

Would it be possible to work with libfolks-eds25 and other libraries alone? Or would it be possible to modify evolution-data-server building to not depend on GTK3 since we're not using the toolkit anyway?

-- themes (unity-asset-pool, adwaita-icon-theme...) --

humanity-icon-theme, ubuntu-mono and unity-asset-pool depend on adwaita-icon-theme. adwaita-icon-theme directly depends on GTK3.

-- ubuntu-system-settings --

ubuntu-system-settings depends on libtimezonemap1 which directly depends on GTK3. Maybe the library could be made not to depend on GTK3?

===DONE===
-- gnome-control-center-signon --
Since libaccount-plugin-1.0-0 is included on Ubuntu Phone images, would it be possible to refactor it so that it would not depend on GTK3 bringing it on the images?

[Timo Jyrinki (timo-jyrinki)]

libaccount-plugin-1.0-0 removed from images with add_package in livecd-rootfs live-build config to explicitly pull ubuntu-system-settings-online-accounts instead of the first mentioned libaccount-plugin-google in a "|" dependency: http://people.canonical.com/~ogra/touch-image-stats/149.changes

[Timo Jyrinki (timo-jyrinki)]

As a related item, GTK2 was successfully dropped starting at http://people.canonical.com/~ogra/touch-image-stats/20150521.changes

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Lars Karlitski (larsu)]

litimezonemap contains gtk3 widgets that are used in unity7's system settings. Can we make unity-system-settings not depend on it?

[Pat McGowan (pat-mcgowan)]

@timo can you update the status for this

[Timo Jyrinki (timo-jyrinki)]

@Pat: We'd need desktop team to do the splitting they've been thinking about. seb128 was talking about the evolution-data-server, thinking it's doable.

Maybe Ken could look at the ubuntu-system-settings libtimezonemap dependency larsu mentioned in comment #6.

After that there'd be the theme/artwork packages which could also fall into desktop team's hands, thinking about how to relax the dependencies or split packages so that they'd be usable on Touch without bringing GTK dependencies.

[Timo Jyrinki (timo-jyrinki)]

I think this might be best assigned to Bill first, possibly to Will later for the desktop splitting parts.

[Charles Kerr (charlesk)]

From cursory grepping, it looks like evolution-data-server's direct use of gtk+ is limited to (a) generating documentation with gtk-doc and (b) loading gtk modules when running tests with the environment variable 'EDS_TESTING' set.

libgweather's got a harder dependency on gtk, but evolution-data-server's use of libgweather is optional and can be turned off in its configure script with --disable-gtk, which also disables its use of gcr