[bug#52065] [PATCH core-updates-frozen] gnu: gdm: Pass GDK_PIXBUF_MODULE_FILE to sessions.

[Josselin Poiret]

Hello,

This patch should fix GDM not showing svg icons, most notably the peek
password one on the login prompt.

Best,
Josselin

-- >8 --
* gnu/packages/patches/gdm-pass-gdk-pixbuf-loader-env.patch: Add
patch.
* gnu/local.mk (dist_patch_DATA): List it.
* gnu/packages/gnome.scm (gdm): Use it.
* gnu/services/xorg.scm (gdm-shepherd-service): Pass
GDK_PIXBUF_MODULE_FILE.
---
 gnu/local.mk                                  |  1 +
 gnu/packages/gnome.scm                        |  3 ++-
 .../gdm-pass-gdk-pixbuf-loader-env.patch      | 24 +++++++++++++++++++
 gnu/services/xorg.scm                         |  4 ++++
 4 files changed, 31 insertions(+), 1 deletion(-)
 create mode 100644 gnu/packages/patches/gdm-pass-gdk-pixbuf-loader-env.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 351c81bb3a..fe86c635c1 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1114,6 +1114,7 @@ dist_patch_DATA =                                         
\
   %D%/packages/patches/gdm-elogind-support.patch               \
   %D%/packages/patches/gdm-remove-hardcoded-xwayland-path.patch        \
   %D%/packages/patches/gdm-wayland-session-wrapper-from-env.patch      \
+  %D%/packages/patches/gdm-pass-gdk-pixbuf-loader-env.patch    \
   %D%/packages/patches/genimage-mke2fs-test.patch              \
   %D%/packages/patches/geoclue-config.patch                    \
   %D%/packages/patches/ghc-8.0-fall-back-to-madv_dontneed.patch        \
diff --git a/gnu/packages/gnome.scm b/gnu/packages/gnome.scm
index 40f49a44db..6d56d04915 100644
--- a/gnu/packages/gnome.scm
+++ b/gnu/packages/gnome.scm
@@ -8367,7 +8367,8 @@ (define-public gdm
                 "gdm-default-session.patch"
                 "gdm-elogind-support.patch"
                 "gdm-remove-hardcoded-xwayland-path.patch"
-                "gdm-wayland-session-wrapper-from-env.patch"))))
+                "gdm-wayland-session-wrapper-from-env.patch"
+                "gdm-pass-gdk-pixbuf-loader-env.patch"))))
     (build-system meson-build-system)
     (arguments
      `(#:glib-or-gtk? #t
diff --git a/gnu/packages/patches/gdm-pass-gdk-pixbuf-loader-env.patch 
b/gnu/packages/patches/gdm-pass-gdk-pixbuf-loader-env.patch
new file mode 100644
index 0000000000..4341e3fc30
--- /dev/null
+++ b/gnu/packages/patches/gdm-pass-gdk-pixbuf-loader-env.patch
@@ -0,0 +1,24 @@
+From 444250fce55f916af993bc855930c6809686e4bd Mon Sep 17 00:00:00 2001
+From: Josselin Poiret <dev@jpoiret.xyz>
+Date: Tue, 23 Nov 2021 18:39:39 +0000
+Subject: [PATCH] Make GDM pass GDK_PIXBUF_MODULE_FILE to sessions
+
+---
+ daemon/gdm-launch-environment.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/daemon/gdm-launch-environment.c b/daemon/gdm-launch-environment.c
+index 14ecfac2..3e618321 100644
+--- a/daemon/gdm-launch-environment.c
++++ b/daemon/gdm-launch-environment.c
+@@ -158,6 +158,7 @@ build_launch_environment (GdmLaunchEnvironment 
*launch_environment,
+                 "WINDOWPATH",
+                 "XCURSOR_PATH",
+                 "XDG_CONFIG_DIRS",
++                "GDK_PIXBUF_MODULE_FILE",
+                 NULL
+         };
+         char *system_data_dirs;
+-- 
+2.33.1
+
diff --git a/gnu/services/xorg.scm b/gnu/services/xorg.scm
index 0735d777bd..3abee8694a 100644
--- a/gnu/services/xorg.scm
+++ b/gnu/services/xorg.scm
@@ -1004,6 +1004,10 @@ (define (gdm-shepherd-service config)
                            ;; cursors.  gdm doesn't login so doesn't source
                            ;; the corresponding line in /etc/profile.
                            
"XCURSOR_PATH=/run/current-system/profile/share/icons"
+                           (string-append
+                            "GDK_PIXBUF_MODULE_FILE="
+                            #$gnome-shell
+                            "/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache")
                            (string-append
                             "GDM_WAYLAND_SESSION="
                             #$(gdm-configuration-wayland-session config))))))
-- 
2.33.1