home-manager/modules/programs/bash.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.programs.bash;
in
{
meta.maintainers = [ maintainers.rycee ];
imports = [
(mkRenamedOptionModule [ "programs" "bash" "enableAutojump" ] [
"programs"
"autojump"
"enable"
])
];
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options = {
programs.bash = {
enable = mkEnableOption "GNU Bourne-Again SHell";
historySize = mkOption {
type = types.int;
default = 10000;
description = "Number of history lines to keep in memory.";
};
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historyFile = mkOption {
type = types.nullOr types.str;
default = null;
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description = "Location of the bash history file.";
};
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historyFileSize = mkOption {
type = types.int;
default = 100000;
description = "Number of history lines to keep on file.";
};
historyControl = mkOption {
type = types.listOf (types.enum [
"erasedups"
"ignoredups"
"ignorespace"
]);
default = [];
description = "Controlling how commands are saved on the history list.";
};
historyIgnore = mkOption {
type = types.listOf types.str;
default = [];
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example = [ "ls" "cd" "exit" ];
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description = "List of commands that should not be saved to the history list.";
};
shellOptions = mkOption {
type = types.listOf types.str;
default = [
# Append to history file rather than replacing it.
"histappend"
# check the window size after each command and, if
# necessary, update the values of LINES and COLUMNS.
"checkwinsize"
# Extended globbing.
"extglob"
"globstar"
# Warn if closing shell with running jobs.
"checkjobs"
];
description = "Shell options to set.";
};
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sessionVariables = mkOption {
default = {};
type = types.attrs;
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example = { MAILCHECK = 30; };
description = ''
Environment variables that will be set for the Bash session.
'';
};
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shellAliases = mkOption {
default = {};
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type = types.attrsOf types.str;
example = literalExample ''
{
ll = "ls -l";
".." = "cd ..";
}
'';
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description = ''
An attribute set that maps aliases (the top level attribute names in
this option) to command strings or directly to build outputs.
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'';
};
profileExtra = mkOption {
default = "";
type = types.lines;
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description = ''
Extra commands that should be run when initializing a login
shell.
'';
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};
bashrcExtra = mkOption {
# Hide for now, may want to rename in the future.
visible = false;
default = "";
type = types.lines;
description = ''
Extra commands that should be added to
<filename>~/.bashrc</filename>.
'';
};
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initExtra = mkOption {
default = "";
type = types.lines;
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description = ''
Extra commands that should be run when initializing an
interactive shell.
'';
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};
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logoutExtra = mkOption {
default = "";
type = types.lines;
description = ''
Extra commands that should be run when logging out of an
interactive shell.
'';
};
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};
};
config = (
let
aliasesStr = concatStringsSep "\n" (
mapAttrsToList (k: v: "alias ${k}=${escapeShellArg v}") cfg.shellAliases
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);
shoptsStr = concatStringsSep "\n" (
map (v: "shopt -s ${v}") cfg.shellOptions
);
sessionVarsStr = config.lib.shell.exportAll cfg.sessionVariables;
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historyControlStr =
concatStringsSep "\n" (mapAttrsToList (n: v: "${n}=${v}") (
{
HISTFILESIZE = toString cfg.historyFileSize;
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HISTSIZE = toString cfg.historySize;
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}
// optionalAttrs (cfg.historyFile != null) {
HISTFILE = "\"${cfg.historyFile}\"";
}
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// optionalAttrs (cfg.historyControl != []) {
HISTCONTROL = concatStringsSep ":" cfg.historyControl;
}
// optionalAttrs (cfg.historyIgnore != []) {
HISTIGNORE = concatStringsSep ":" cfg.historyIgnore;
}
));
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in mkIf cfg.enable {
programs.bash.bashrcExtra = ''
# Commands that should be applied only for interactive shells.
if [[ $- == *i* ]]; then
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${historyControlStr}
${shoptsStr}
${aliasesStr}
${cfg.initExtra}
fi
'';
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home.file.".bash_profile".text = ''
# -*- mode: sh -*-
# include .profile if it exists
[[ -f ~/.profile ]] && . ~/.profile
# include .bashrc if it exists
[[ -f ~/.bashrc ]] && . ~/.bashrc
'';
home.file.".profile".text = ''
# -*- mode: sh -*-
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. "${config.home.profileDirectory}/etc/profile.d/hm-session-vars.sh"
${sessionVarsStr}
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${cfg.profileExtra}
'';
home.file.".bashrc".text = ''
# -*- mode: sh -*-
${cfg.bashrcExtra}
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'';
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home.file.".bash_logout" = mkIf (cfg.logoutExtra != "") {
text = ''
# -*- mode: sh -*-
${cfg.logoutExtra}
'';
};
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}
);
}