Re: Conflict resolution (gtk, wayland)

[Ludovic Courtès]

Hello,

Pierre Neidhardt <address@hidden> skribis:

> Sometimes when updating or install packages, guix encounters conflicts.
> It's usually smart enough to fix it by itself.
>
> That said, conflicts seems to be a telltale sign of bad packaging
> (e.g. duplicate files in a package and its inputs).
>
> Presently guix reports 3 conflicts on my install:
>
> warning: collision encountered:
>   
> /gnu/store/9hddxnv7q3q819axyw0yngzppmrgmjfi-mesa-17.3.8/lib/pkgconfig/wayland-egl.pc
>   
> /gnu/store/2w8lhl8hyvciy3hb0h2r0mbhx7pmniy1-wayland-1.15.0/lib/pkgconfig/wayland-egl.pc
> warning: choosing 
> /gnu/store/9hddxnv7q3q819axyw0yngzppmrgmjfi-mesa-17.3.8/lib/pkgconfig/wayland-egl.pc
>
> warning: collision encountered:
>   
> /gnu/store/9hddxnv7q3q819axyw0yngzppmrgmjfi-mesa-17.3.8/lib/libwayland-egl.la
>   
> /gnu/store/2w8lhl8hyvciy3hb0h2r0mbhx7pmniy1-wayland-1.15.0/lib/libwayland-egl.la
> warning: choosing 
> /gnu/store/9hddxnv7q3q819axyw0yngzppmrgmjfi-mesa-17.3.8/lib/libwayland-egl.la
>
> warning: collision encountered:
>   
> /gnu/store/nf6py3ddvk8nsqxg7jlg0kmiqjigiqgw-gtk-icon-themes/share/icons/hicolor/icon-theme.cache
>   
> /gnu/store/mg1ilfq7ajcsk12kanzsbb8jhgv7g5vm-gtk+-3.22.29/share/icons/hicolor/icon-theme.cache
> warning: choosing 
> /gnu/store/nf6py3ddvk8nsqxg7jlg0kmiqjigiqgw-gtk-icon-themes/share/icons/hicolor/icon-theme.cache

[...]

> So if I get it right, gtk-icon-themes is an automatically generated
> store items for each profile and it duplicates a file found in
> gtk+-3.22.29.
> Is this a packaging mistake?

No, “icon-theme.cache” collisions can be ignored.  In fact, I think we
should not warn about them in the first place.

> Now to wayland:
>
>> guix gc -R /gnu/store/9hddxnv7q3q819axyw0yngzppmrgmjfi-mesa-17.3.8 | grep 
>> wayland
> /gnu/store/2w8lhl8hyvciy3hb0h2r0mbhx7pmniy1-wayland-1.15.0
>
>> guix gc --referrers 
>> /gnu/store/2w8lhl8hyvciy3hb0h2r0mbhx7pmniy1-wayland-1.15.0 | grep mesa
> /gnu/store/9hddxnv7q3q819axyw0yngzppmrgmjfi-mesa-17.3.8
>
> So mesa depends on wayland and wayland is properly referred to by mesa.
> So far so good.  Same question: is this a packaging mistake?

It could be.

Actually, the .so files are identical, but the .la files differ
trivially:

--8<---------------cut here---------------start------------->8---
$ cmp $(guix build mesa)/lib/libwayland-egl.so $(guix build 
wayland)/lib/libwayland-egl.so
$ diff -u $(guix build mesa)/lib/libwayland-egl.la $(guix build 
wayland)/lib/libwayland-egl.la
--- 
/gnu/store/9hddxnv7q3q819axyw0yngzppmrgmjfi-mesa-17.3.8/lib/libwayland-egl.la   
    1970-01-01 01:00:01.000000000 +0100
+++ 
/gnu/store/2w8lhl8hyvciy3hb0h2r0mbhx7pmniy1-wayland-1.15.0/lib/libwayland-egl.la
    1970-01-01 01:00:01.000000000 +0100
@@ -1,5 +1,5 @@
 # libwayland-egl.la - a libtool library file
-# Generated by libtool (GNU libtool) 2.4.6 Debian-2.4.6-2
+# Generated by libtool (GNU libtool) 2.4.6
 #
 # Please DO NOT delete this file!
 # It is necessary for linking the library.
@@ -38,4 +38,4 @@
 dlpreopen=''
 
 # Directory that this library needs to be installed in:
-libdir='/gnu/store/9hddxnv7q3q819axyw0yngzppmrgmjfi-mesa-17.3.8/lib'
+libdir='/gnu/store/2w8lhl8hyvciy3hb0h2r0mbhx7pmniy1-wayland-1.15.0/lib'
--8<---------------cut here---------------end--------------->8---

I’m not familiar enough with these packages, and I’m not sure why they
both provide this library.

Ideas?  Rutger maybe?

Thanks,
Ludo’.