[Bug 1976352] Re: The plymouth label plugin pulls in too many dependencies

[Alfonso Sanchez-Beato]

libharzbuff would allow drawing glyphs for most languages with much less
requirements than libpango. But that requires some work. So it is an
alternative if in the future we need something more powerful but want to
avoid pango. The change itself is easy to revert thanks to plymouth
plugin base architecture - label-ft and label have the same ABI, it is
just that label-ft has a subset of label's capabilities.

Regarding dependencies, this is what pangocairo pulls:

$ ldd /lib/x86_64-linux-gnu/libpangocairo-1.0.so.0
	linux-vdso.so.1 (0x00007fff72bfa000)
	libpango-1.0.so.0 => /lib/x86_64-linux-gnu/libpango-1.0.so.0 (0x00007f3840a6d000)
	libpangoft2-1.0.so.0 => /lib/x86_64-linux-gnu/libpangoft2-1.0.so.0 (0x00007f3840a52000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f384096b000)
	libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f3840831000)
	libgobject-2.0.so.0 => /lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007f38407d1000)
	libharfbuzz.so.0 => /lib/x86_64-linux-gnu/libharfbuzz.so.0 (0x00007f3840700000)
	libfontconfig.so.1 => /lib/x86_64-linux-gnu/libfontconfig.so.1 (0x00007f38406b6000)
	libcairo.so.2 => /lib/x86_64-linux-gnu/libcairo.so.2 (0x00007f384058e000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f3840366000)
	libgio-2.0.so.0 => /lib/x86_64-linux-gnu/libgio-2.0.so.0 (0x00007f384018e000)
	libfribidi.so.0 => /lib/x86_64-linux-gnu/libfribidi.so.0 (0x00007f3840172000)
	libthai.so.0 => /lib/x86_64-linux-gnu/libthai.so.0 (0x00007f3840167000)
	libfreetype.so.6 => /lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007f384009d000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f3840b02000)
	libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f3840027000)
	libffi.so.8 => /lib/x86_64-linux-gnu/libffi.so.8 (0x00007f384001a000)
	libgraphite2.so.3 => /lib/x86_64-linux-gnu/libgraphite2.so.3 (0x00007f383fff3000)
	libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f383ffc2000)
	libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007f383ffb7000)
	libpixman-1.so.0 => /lib/x86_64-linux-gnu/libpixman-1.so.0 (0x00007f383ff0c000)
	libpng16.so.16 => /lib/x86_64-linux-gnu/libpng16.so.16 (0x00007f383fed1000)
	libxcb-shm.so.0 => /lib/x86_64-linux-gnu/libxcb-shm.so.0 (0x00007f383fecc000)
	libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f383fea2000)
	libxcb-render.so.0 => /lib/x86_64-linux-gnu/libxcb-render.so.0 (0x00007f383fe93000)
	libXrender.so.1 => /lib/x86_64-linux-gnu/libXrender.so.1 (0x00007f383fe84000)
	libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007f383fd44000)
	libXext.so.6 => /lib/x86_64-linux-gnu/libXext.so.6 (0x00007f383fd2f000)
	libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f383fd13000)
	libgmodule-2.0.so.0 => /lib/x86_64-linux-gnu/libgmodule-2.0.so.0 (0x00007f383fd0c000)
	libmount.so.1 => /lib/x86_64-linux-gnu/libmount.so.1 (0x00007f383fcc8000)
	libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1 (0x00007f383fc9a000)
	libdatrie.so.1 => /lib/x86_64-linux-gnu/libdatrie.so.1 (0x00007f383fc91000)
	libbrotlidec.so.1 => /lib/x86_64-linux-gnu/libbrotlidec.so.1 (0x00007f383fc83000)
	libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007f383fc7d000)
	libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f383fc75000)
	libblkid.so.1 => /lib/x86_64-linux-gnu/libblkid.so.1 (0x00007f383fc3c000)
	libpcre2-8.so.0 => /lib/x86_64-linux-gnu/libpcre2-8.so.0 (0x00007f383fba5000)
	libbrotlicommon.so.1 => /lib/x86_64-linux-gnu/libbrotlicommon.so.1 (0x00007f383fb82000)
	libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f383fb6a000)
	libmd.so.0 => /lib/x86_64-linux-gnu/libmd.so.0 (0x00007f383fb5d000)

It would be indeed good to remove, say, libX* deps. If we do that we
could in the future remove label-ft indeed.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to plymouth in Ubuntu.
https://bugs.launchpad.net/bugs/1976352

Title:
  The plymouth label plugin pulls in too many dependencies

Status in plymouth package in Ubuntu:
  Fix Committed

Bug description:
  The plymouth label plugin pulls in too many dependencies (libpango,
  libcairo, X libs, etc.). This is an issue for integration in the
  initramfs.

  There is an alternative plugin (label-ft) that has been proposed upstream:
  https://gitlab.freedesktop.org/plymouth/plymouth/-/merge_requests/91
  As it is a separate plugin, core parts of plymouth are only slightly changed.

  The package built for kinetic can be found here:
  https://launchpad.net/~alfonsosanchezbeato/+archive/ubuntu/plymouth

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1976352/+subscriptions