[pkg-anthy-devel] Bug#789927: libanthyinput0: fails to upgrade from 'sid' - trying to overwrite /usr/lib/x86_64-linux-gnu/libanthyinput.so.0.0.0'

[astian]

Control: affects -1 ibus-anthy
Control: found -1 ibus-anthy/1.5.9-2
Control: found -1 anthy/1:0.3-5

Hi,

Packaging is still broken on sid.  (Interesting how 2 years of forewarning
were still not sufficient to prevent this.)

  $ sudo apt install ibus-anthy
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:

  The following packages have unmet dependencies:
   ibus-anthy : Depends: libanthy0 but it is not going to be installed
  E: Unable to correct problems, you have held broken packages.

Note: I have *not* held packages.

Anyway, it seems to me that the problem is not difficult to identify (though I
can't give great insight about the solution): it is obvious that the groups of
packages <libanthy0> and <libanthy1, libanthyinput0> conflict, yet there are
many (IME-related) packages (such as ibus-anthy, or kasumi) that depend on
both "anthy" (which now pulls in libanthy1 and libanthyinput0) and
"libanthy0", which is an unworkable situation.

Now, I wonder, why does libanthy0 have to still exist (in parallel to the new
libanthy1 and libanthyinput0)?  Why not simply replacing the dependency in all
packages dependent on libanthy0 (and then maybe even removing libanthy0)?
Just thinking out loud.

You might want to take a look at the graph below showing some anthy-related
dependencies on Debian unstable (I had to edit it by hand because both
"apt-cache dotty" and "debtree" are too under-featured).

Thanks.

--

digraph packages {
concentrate=true;
size="30,40";
"ibus-anthy" -> "anthy";
"ibus-anthy" -> "ibus";
"libanthyinput0" -> "libanthy1";
"libanthyinput0" -> "anthy"[color=springgreen];
"anthy" -> "anthy-common";
"anthy" -> "libanthy1";
"anthy" -> "libanthyinput0";
"anthy" -> "anthy-common"[color=springgreen];
"libanthy0" -> "anthy-common";
"libanthy1" -> "anthy-common";

"uim-dict-gtk3" -> "libanthy0";
"uim-dict-gtk" -> "libanthy0";
"uim-anthy" -> "libanthy0";
"hime-anthy" -> "libanthy0";
"gcin-anthy" -> "libanthy0";
"uim-dict-gtk3" -> "libanthy0";
"uim-dict-gtk" -> "libanthy0";
"uim-anthy" -> "libanthy0";
"fcitx-anthy" -> "libanthy0";
"uim-dict-gtk3" -> "libanthy0";
"uim-dict-gtk" -> "libanthy0";
"uim-anthy" -> "libanthy0";
"scim-anthy" -> "libanthy0";
"m17n-lib-mimx" -> "libanthy0";
"ibus-anthy" -> "libanthy0";
"hime-anthy" -> "libanthy0";
"gcin-anthy" -> "libanthy0";
"kasumi" -> "libanthy0";

"ibus-anthy" [shape=box];
"anthy-common" [shape=box];
"ibus" [color=orange,shape=box];
"libanthyinput0" [shape=box];
"anthy" [shape=box];
"libanthy0" [shape=box];
"libanthy1" [shape=box];

"uim-dict-gtk3" [shape=box];
"uim-dict-gtk" [shape=box];
"uim-anthy" [shape=box];
"hime-anthy" [shape=box];
"gcin-anthy" [shape=box];
"uim-dict-gtk3" [shape=box];
"uim-dict-gtk" [shape=box];
"uim-anthy" [shape=box];
"fcitx-anthy" [shape=box];
"uim-dict-gtk3" [shape=box];
"uim-dict-gtk" [shape=box];
"uim-anthy" [shape=box];
"scim-anthy" [shape=box];
"m17n-lib-mimx" [shape=box];
"hime-anthy" [shape=box];
"gcin-anthy" [shape=box];
"kasumi" [shape=box];
}