depot/third_party/nixpkgs/nixos/modules/programs/bash/bash-completion.nix

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{ config, lib, pkgs, ... }:
let
enable = config.programs.bash.enableCompletion;
in
{
options = {
programs.bash.enableCompletion = lib.mkEnableOption "Bash completion for all interactive bash shells" // {
default = true;
};
};
config = lib.mkIf enable {
programs.bash.promptPluginInit = ''
# Check whether we're running a version of Bash that has support for
# programmable completion. If we do, enable all modules installed in
# the system and user profile in obsolete /etc/bash_completion.d/
# directories. Bash loads completions in all
# $XDG_DATA_DIRS/bash-completion/completions/
# on demand, so they do not need to be sourced here.
if shopt -q progcomp &>/dev/null; then
. "${pkgs.bash-completion}/etc/profile.d/bash_completion.sh"
nullglobStatus=$(shopt -p nullglob)
shopt -s nullglob
for p in $NIX_PROFILES; do
for m in "$p/etc/bash_completion.d/"*; do
. "$m"
done
done
eval "$nullglobStatus"
unset nullglobStatus p m
fi
'';
};
}