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Fix logic for default XDG_DATA_DIRS value

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The [POSIX test manpage](https://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html)
as well as the [fish test manpage](https://fishshell.com/docs/current/cmds/test.html#operators-for-text-strings)
specify that `-z` will be "True if the length of string string is zero;
otherwise, false."

The `-n` was likely a mixup and not caught during testing of
https://github.com/NixOS/nix/pull/8985 due to a lack of missing
conflicting entries in `XDG_DATA_DIRS`.
This commit is contained in:
Felix Uhl 2023-11-06 23:16:05 +01:00 • committed by Valentin Gagarin
parent fe62cb79a6
commit 1362a0a55a
4 changed files with 4 additions and 4 deletions
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2
scripts/nix-profile.sh.in
View file

@ -33,7 +33,7 @@ if [ -n "$HOME" ] && [ -n "$USER" ]; then
export NIX_PROFILES="@localstatedir@/nix/profiles/default $NIX_LINK"
# Populate bash completions, .desktop files, etc
if [ -n "${XDG_DATA_DIRS-}" ]; then
if [ -z "$XDG_DATA_DIRS" ]; then
# According to XDG spec the default is /usr/local/share:/usr/share, don't set something that prevents that default
export XDG_DATA_DIRS="/usr/local/share:/usr/share:$NIX_LINK/share:/nix/var/nix/profiles/default/share"
else