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nixos/zsh: don’t be noisy when scripts are run with -u

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When a script specifies the shell option “nounset” as part of the shebang (e.g.,
via “#!/usr/bin/env -S zsh -u”), our initialization scripts would produce error
messages of the form:

    __ETC_FOO_SOURCED: parameter not set

These messages could probably be confusing to users when running such scripts.
By providing a fall-back in the parameter expansion, we can avoid them.

This patch does not address interactive shell start-up, where such messages may
(or may not) be less problematic.
This commit is contained in:
Sebastian Reuße 2022-10-24 13:36:22 +02:00
parent bc4ce318bf
commit 7d84dbdf5b
1 changed files with 3 additions and 3 deletions
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6
nixos/modules/programs/zsh/zsh.nix
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@ -173,10 +173,10 @@ in
# This file is read for all shells.
# Only execute this file once per shell.
if [ -n "$__ETC_ZSHENV_SOURCED" ]; then return; fi
if [ -n "''${__ETC_ZSHENV_SOURCED-}" ]; then return; fi
__ETC_ZSHENV_SOURCED=1
if [ -z "$__NIXOS_SET_ENVIRONMENT_DONE" ]; then
if [ -z "''${__NIXOS_SET_ENVIRONMENT_DONE-}" ]; then
. ${config.system.build.setEnvironment}
fi
@ -206,7 +206,7 @@ in
${zshStartupNotes}
# Only execute this file once per shell.
if [ -n "$__ETC_ZPROFILE_SOURCED" ]; then return; fi
if [ -n "''${__ETC_ZPROFILE_SOURCED-}" ]; then return; fi
__ETC_ZPROFILE_SOURCED=1
# Setup custom login shell init stuff.