GNU bug report logs - #39231
[PATCH] guix-install.sh: Correctly treat empty or unset $XDG_DATA_DIRS

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From: Alexander Krotov <krotov <at> iitp.ru>
To: 39231 <at> debbugs.gnu.org
Cc: Alexander Krotov <krotov <at> iitp.ru>
Subject: [bug#39231] [PATCH] guix-install.sh: Correctly treat empty or unset $XDG_DATA_DIRS
Date: Wed, 22 Jan 2020 02:01:33 +0300

If $XDG_DATA_DIRS is unset, default value of "/usr/local/share:/usr/share"
is used according to XDG Base Directory Specification. However,
/etc/profile.d/guix.sh treats this value as empty list when appending its
own directory, so after installing Guix on the system, launchers such
as Rofi stop searching for .desktop files in /usr/share/applications/
and can't launch applications other than those installed with Guix.

This patch fixes the bug in generated /etc/profile.d/guix.sh

* etc/guix-install.sh (sys_create_init_profile): Use default value of
  /usr/local/share:/usr/share/ before appending if $XDG_DATA_DIRS is not
  set.
---
 etc/guix-install.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/etc/guix-install.sh b/etc/guix-install.sh
index b57d71981f..da781d41ff 100755
--- a/etc/guix-install.sh
+++ b/etc/guix-install.sh
@@ -409,7 +409,7 @@ export GUIX_PROFILE GUIX_LOCPATH
 eval `guix package --search-paths=prefix 2> /dev/null`
 
 # set XDG_DATA_DIRS to include Guix installations
-export XDG_DATA_DIRS="$GUIX_PROFILE/share${XDG_DATA_DIRS:+:}$XDG_DATA_DIRS"
+export XDG_DATA_DIRS="$GUIX_PROFILE/share:${XDG_DATA_DIRS:-/usr/local/share/:/usr/share/}"
 EOF
 }
 
-- 
2.25.0

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