nixpkgs/modules/programs/bash/bash.nix

92 lines
2.5 KiB
Nix

# This module defines global configuration for the Bash shell, in
# particular /etc/bashrc and /etc/profile.
{ config, pkgs, ... }:
with pkgs.lib;
let
initBashCompletion = optionalString config.environment.enableBashCompletion ''
# 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).
if shopt -q progcomp &>/dev/null; then
. "${pkgs.bashCompletion}/etc/profile.d/bash_completion.sh"
nullglobStatus=$(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
'';
options = {
environment.shellInit = mkOption {
default = "";
example = ''export PATH=/godi/bin/:$PATH'';
description = "
Script used to initialized user shell environments.
";
type = with pkgs.lib.types; string;
};
environment.enableBashCompletion = mkOption {
default = false;
description = "Enable bash-completion for all interactive shells.";
type = with pkgs.lib.types; bool;
};
};
in
{
require = [options];
environment.etc =
[ { # Script executed when the shell starts as a login shell.
source = pkgs.substituteAll {
src = ./profile.sh;
wrapperDir = config.security.wrapperDir;
shellInit = config.environment.shellInit;
};
target = "profile";
}
{ # /etc/bashrc: executed every time a bash starts. Sources
# /etc/profile to ensure that the system environment is
# configured properly.
source = pkgs.substituteAll {
src = ./bashrc.sh;
inherit initBashCompletion;
};
target = "bashrc";
}
{ # Configuration for readline in bash.
source = ./inputrc;
target = "inputrc";
}
];
system.build.binsh = pkgs.bashInteractive;
system.activationScripts.binsh = stringAfter [ "stdio" ]
''
# Create the required /bin/sh symlink; otherwise lots of things
# (notably the system() function) won't work.
mkdir -m 0755 -p /bin
ln -sfn ${config.system.build.binsh}/bin/sh /bin/.sh.tmp
mv /bin/.sh.tmp /bin/sh # atomically replace /bin/sh
'';
environment.pathsToLink = optional config.environment.enableBashCompletion "/etc/bash_completion.d";
}