home-manager/modules/home-environment.nix
Robert Helgesson 86217419e7
home-environment: handle no home files
If no files should be installed into the home directory then an error
would occur since the directory holding the files would never be
created. With this change the directory is unconditionally created.
2017-01-17 22:12:51 +01:00

356 lines
9.4 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.home;
languageSubModule = types.submodule {
options = {
base = mkOption {
type = types.str;
description = ''
The language to use unless overridden by a more specific option.
'';
};
address = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for addresses.
'';
};
monetary = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for formatting currencies and money amounts.
'';
};
paper = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for paper sizes.
'';
};
time = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for formatting times.
'';
};
};
};
keyboardSubModule = types.submodule {
options = {
layout = mkOption {
type = types.str;
default = "us";
description = ''
Keyboard layout.
'';
};
model = mkOption {
type = types.str;
default = "pc104";
example = "presario";
description = ''
Keyboard model.
'';
};
options = mkOption {
type = types.listOf types.str;
default = [];
example = ["grp:caps_toggle" "grp_led:scroll"];
description = ''
X keyboard options; layout switching goes here.
'';
};
variant = mkOption {
type = types.str;
default = "";
example = "colemak";
description = ''
X keyboard variant.
'';
};
};
};
in
{
options = {
home.file = mkOption {
description = "Attribute set of files to link into the user home.";
default = {};
type = types.loaOf (types.submodule (
{ name, config, ... }: {
options = {
target = mkOption {
type = types.str;
description = ''
Path to target file relative to <envar>HOME</envar>.
'';
};
text = mkOption {
default = null;
type = types.nullOr types.lines;
description = "Text of the file.";
};
source = mkOption {
type = types.path;
description = "Path of the source file.";
};
mode = mkOption {
type = types.str;
default = "444";
description = "The permissions to apply to the file.";
};
};
config = {
target = mkDefault name;
source = mkIf (config.text != null) (
let name' = "user-etc-" + baseNameOf name;
in mkDefault (pkgs.writeText name' config.text)
);
};
})
);
};
home.language = mkOption {
type = languageSubModule;
default = {};
description = "Language configuration.";
};
home.keyboard = mkOption {
type = keyboardSubModule;
default = {};
description = "Keyboard configuration.";
};
home.sessionVariables = mkOption {
default = {};
type = types.attrs;
example = { EDITOR = "emacs"; GS_OPTIONS = "-sPAPERSIZE=a4"; };
description = ''
Environment variables to always set at login.
'';
};
home.sessionVariableSetter = mkOption {
default = "bash";
type = types.enum [ "pam" "bash" ];
example = "pam";
description = ''
Identifies the module that should set the session variables.
</para><para>
If "bash" is set then <varname>config.bash.enable</varname>
must also be enabled.
</para><para>
If "pam" is set then PAM must be used to set the system
environment. Also mind that typical environment variables
might not be set by the time PAM starts up.
'';
};
home.packages = mkOption {
type = types.listOf types.package;
default = [];
description = "The set of packages to appear in the user environment.";
};
home.path = mkOption {
internal = true;
description = "The derivation installing the user packages.";
};
home.activation = mkOption {
internal = true;
default = {};
type = types.attrs;
description = ''
Activation scripts for the home environment.
</para><para>
Any script should respect the <varname>DRY_RUN</varname>
variable, if it is set then no actual action should be taken.
The variable <varname>DRY_RUN_CMD</varname> is set to
<code>echo</code> if dry run is enabled. Thus, many cases you
can use the idiom <code>$DRY_RUN_CMD rm -rf /</code>.
'';
};
home.activationPackage = mkOption {
internal = true;
type = types.package;
description = "The package containing the complete activation script.";
};
};
config = {
home.sessionVariables =
let
maybeSet = name: value:
listToAttrs (optional (value != null) { inherit name value; });
in
(maybeSet "LANG" cfg.language.base)
//
(maybeSet "LC_ADDRESS" cfg.language.address)
//
(maybeSet "LC_MONETARY" cfg.language.monetary)
//
(maybeSet "LC_PAPER" cfg.language.paper)
//
(maybeSet "LC_TIME" cfg.language.time);
home.activation.linkGeneration =
let
link = pkgs.writeText "link" ''
newGenFiles="$1"
shift
for sourcePath in "$@" ; do
relativePath="$(realpath --relative-to "$newGenFiles" "$sourcePath")"
targetPath="$HOME/$relativePath"
$DRY_RUN_CMD mkdir -vp "$(dirname "$targetPath")"
$DRY_RUN_CMD ln -vsf "$sourcePath" "$targetPath"
done
'';
cleanup = pkgs.writeText "cleanup" ''
newGenFiles="$1"
oldGenFiles="$2"
shift 2
for sourcePath in "$@" ; do
relativePath="$(realpath --relative-to "$oldGenFiles" "$sourcePath")"
targetPath="$HOME/$relativePath"
echo -n "Checking $targetPath"
if [[ -f "$newGenFiles/$relativePath" ]] ; then
echo " exists"
else
echo " gone (deleting)"
$DRY_RUN_CMD rm -v "$targetPath"
$DRY_RUN_CMD rmdir --ignore-fail-on-non-empty -v -p "$(dirname "$targetPath")"
fi
done
'';
in
''
function linkNewGen() {
local newGenFiles
newGenFiles="$(readlink -e "$newGenPath/home-files")"
find "$newGenFiles" -type f -print0 \
| xargs -0 bash ${link} "$newGenFiles"
}
function cleanOldGen() {
if [[ -z "$oldGenPath" ]] ; then
return
fi
echo "Cleaning up orphan links from $HOME"
local newGenFiles oldGenFiles
newGenFiles="$(readlink -e "$newGenPath/home-files")"
oldGenFiles="$(readlink -e "$oldGenPath/home-files")"
find "$oldGenFiles" -type f -print0 \
| xargs -0 bash ${cleanup} "$newGenFiles" "$oldGenFiles"
}
if [[ "$oldGenPath" != "$newGenPath" ]] ; then
$DRY_RUN_CMD ln -Tsfv "$newGenPath" "$newGenProfilePath"
$DRY_RUN_CMD ln -Tsfv "$newGenPath" "$newGenGcPath"
linkNewGen
cleanOldGen
else
echo "Same home files as previous generation ... doing nothing"
fi
'';
home.activation.installPackages =
''
nix-env -i ${cfg.path}
'';
home.activationPackage =
let
addHeader = n: v:
v // {
text = ''
echo Activating ${n}
${v.text}
'';
};
toDepString = n: v: if isString v then noDepEntry v else v;
activationWithDeps =
mapAttrs addHeader (mapAttrs toDepString cfg.activation);
activationCmds =
textClosureMap id activationWithDeps (attrNames activationWithDeps);
sf = pkgs.writeText "activation-script" ''
#!${pkgs.stdenv.shell}
set -e
${builtins.readFile ./activation-init.sh}
${activationCmds}
'';
home-files = pkgs.stdenv.mkDerivation {
name = "home-manager-files";
phases = [ "installPhase" ];
installPhase =
"mkdir -pv $out\n" +
concatStringsSep "\n" (
mapAttrsToList (name: value:
"install -v -D -m${value.mode} ${value.source} $out/${value.target}"
) cfg.file
);
};
in
pkgs.stdenv.mkDerivation {
name = "home-manager-generation";
phases = [ "installPhase" ];
installPhase = ''
install -v -D -m755 ${sf} $out/activate
substituteInPlace $out/activate \
--subst-var-by GENERATION_DIR $out
ln -vs ${home-files} $out/home-files
'';
};
home.path = pkgs.buildEnv {
name = "home-manager-path";
paths = cfg.packages;
meta = {
description = "Environment of packages installed through home-manager";
};
};
};
}