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home-manager/modules/home-environment.nix
Robert Helgesson f69816489d
home-manager: handle missing per-user profiles directory
Specifically, if the global per-user profiles path do not exist and we
cannot create it during the activation, then place our profile in the
Home Manager data directory. We prefer to use the global location,
though, since it makes it visible to `nix-collect-garbage`.

This is intended to improve compatibility with Nix version 2.14 and
later, which no longer creates the per-user directories.

Also, use the Home Manager data directory to manage the gcroot for the
current generation. It does not have to sit in the global per-user
gcroots directory since it should never be eligible for GC.
2023-03-07 23:53:06 +01:00

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{ config, lib, pkgs, ... }:
with lib;
let
inherit (config.home) stateVersion;
cfg = config.home;
languageSubModule = types.submodule {
options = {
base = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use unless overridden by a more specific option.
'';
};
ctype = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
Character classification category.
'';
};
numeric = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for numerical values.
'';
};
time = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for formatting times.
'';
};
collate = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for collation (alphabetical ordering).
'';
};
monetary = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for formatting currencies and money amounts.
'';
};
messages = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for messages, application UI languages, etc.
'';
};
paper = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for paper sizes.
'';
};
name = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for personal names.
'';
};
address = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for addresses.
'';
};
telephone = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for telephone numbers.
'';
};
measurement = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The language to use for measurement values.
'';
};
};
};
keyboardSubModule = types.submodule {
options = {
layout = mkOption {
type = with types; nullOr str;
default =
if versionAtLeast config.home.stateVersion "19.09"
then null
else "us";
defaultText = literalExpression "null";
description = ''
Keyboard layout. If <literal>null</literal>, then the system
configuration will be used.
</para><para>
This defaults to <literal>null</literal> for state
version  19.09 and <literal>"us"</literal> otherwise.
'';
};
model = mkOption {
type = with types; nullOr str;
default = null;
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 = with types; nullOr str;
default =
if versionAtLeast config.home.stateVersion "19.09"
then null
else "";
defaultText = literalExpression "null";
example = "colemak";
description = ''
X keyboard variant. If <literal>null</literal>, then the
system configuration will be used.
</para><para>
This defaults to <literal>null</literal> for state
version  19.09 and <literal>""</literal> otherwise.
'';
};
};
};
in
{
meta.maintainers = [ maintainers.rycee ];
imports = [
(mkRemovedOptionModule [ "home" "sessionVariableSetter" ] ''
Session variables are now always set through the shell. This is
done automatically if the shell configuration is managed by Home
Manager. If not, then you must source the
~/.nix-profile/etc/profile.d/hm-session-vars.sh
file yourself.
'')
];
options = {
home.username = mkOption {
type = types.str;
defaultText = literalExpression ''
"$USER" for state version < 20.09,
undefined for state version 20.09
'';
example = "jane.doe";
description = "The user's username.";
};
home.homeDirectory = mkOption {
type = types.path;
defaultText = literalExpression ''
"$HOME" for state version < 20.09,
undefined for state version 20.09
'';
apply = toString;
example = "/home/jane.doe";
description = "The user's home directory. Must be an absolute path.";
};
home.profileDirectory = mkOption {
type = types.path;
defaultText = literalExpression ''
"''${home.homeDirectory}/.nix-profile" or
"/etc/profiles/per-user/''${home.username}"
'';
readOnly = true;
description = ''
The profile directory where Home Manager generations are installed.
'';
};
home.language = mkOption {
type = languageSubModule;
default = {};
description = "Language configuration.";
};
home.keyboard = mkOption {
type = types.nullOr keyboardSubModule;
default = if versionAtLeast stateVersion "21.11" then null else { };
defaultText = literalExpression ''
"{ }" for state version < 21.11,
"null" for state version 21.11
'';
description = ''
Keyboard configuration. Set to <literal>null</literal> to
disable Home Manager keyboard management.
'';
};
home.shellAliases = mkOption {
type = with types; attrsOf str;
default = { };
example = literalExpression ''
{
g = "git";
"..." = "cd ../..";
}
'';
description = ''
An attribute set that maps aliases (the top level attribute names
in this option) to command strings or directly to build outputs.
</para><para>
This option should only be used to manage simple aliases that are
compatible across all shells. If you need to use a shell specific
feature then make sure to use a shell specific option, for example
<xref linkend="opt-programs.bash.shellAliases"/> for Bash.
'';
};
home.sessionVariables = mkOption {
default = {};
type = with types; lazyAttrsOf (oneOf [ str path int float ]);
example = { EDITOR = "emacs"; GS_OPTIONS = "-sPAPERSIZE=a4"; };
description = ''
Environment variables to always set at login.
</para><para>
The values may refer to other environment variables using
POSIX.2 style variable references. For example, a variable
<varname>parameter</varname> may be referenced as
<code>$parameter</code> or <code>''${parameter}</code>. A
default value <literal>foo</literal> may be given as per
<code>''${parameter:-foo}</code> and, similarly, an alternate
value <literal>bar</literal> can be given as per
<code>''${parameter:+bar}</code>.
</para><para>
Note, these variables may be set in any order so no session
variable may have a runtime dependency on another session
variable. In particular code like
<programlisting language="nix">
home.sessionVariables = {
FOO = "Hello";
BAR = "$FOO World!";
};
</programlisting>
may not work as expected. If you need to reference another
session variable, then do so inside Nix instead. The above
example then becomes
<programlisting language="nix">
home.sessionVariables = {
FOO = "Hello";
BAR = "''${config.home.sessionVariables.FOO} World!";
};
</programlisting>
'';
};
home.sessionPath = mkOption {
type = with types; listOf str;
default = [ ];
example = [
"$HOME/.local/bin"
"\${xdg.configHome}/emacs/bin"
".git/safe/../../bin"
];
description = ''
Extra directories to add to <envar>PATH</envar>.
</para><para>
These directories are added to the <envar>PATH</envar> variable in a
double-quoted context, so expressions like <code>$HOME</code> are
expanded by the shell. However, since expressions like <code>~</code> or
<code>*</code> are escaped, they will end up in the <envar>PATH</envar>
verbatim.
'';
};
home.sessionVariablesExtra = mkOption {
type = types.lines;
default = "";
internal = true;
description = ''
Extra configuration to add to the
<filename>hm-session-vars.sh</filename> file.
'';
};
home.packages = mkOption {
type = types.listOf types.package;
default = [];
description = "The set of packages to appear in the user environment.";
};
home.extraOutputsToInstall = mkOption {
type = types.listOf types.str;
default = [];
example = [ "doc" "info" "devdoc" ];
description = ''
List of additional package outputs of the packages
<varname>home.packages</varname> that should be installed into
the user environment.
'';
};
home.path = mkOption {
internal = true;
description = "The derivation installing the user packages.";
};
home.emptyActivationPath = mkOption {
internal = true;
type = types.bool;
default = versionAtLeast stateVersion "22.11";
defaultText = literalExpression ''
false for state version < 22.11,
true for state version 22.11
'';
description = ''
Whether the activation script should start with an empty
<envar>PATH</envar> variable. When <literal>false</literal> then the
user's <envar>PATH</envar> will be accessible in the script. It is
recommended to keep this at <literal>true</literal> to avoid
uncontrolled use of tools found in PATH.
'';
};
home.activation = mkOption {
type = hm.types.dagOf types.str;
default = {};
example = literalExpression ''
{
myActivationAction = lib.hm.dag.entryAfter ["writeBoundary"] '''
$DRY_RUN_CMD ln -s $VERBOSE_ARG \
''${builtins.toPath ./link-me-directly} $HOME
''';
}
'';
description = ''
The activation scripts blocks to run when activating a Home
Manager generation. Any entry here should be idempotent,
meaning running twice or more times produces the same result
as running it once.
</para><para>
If the script block produces any observable side effect, such
as writing or deleting files, then it
<emphasis>must</emphasis> be placed after the special
<literal>writeBoundary</literal> script block. Prior to the
write boundary one can place script blocks that verifies, but
does not modify, the state of the system and exits if an
unexpected state is found. For example, the
<literal>checkLinkTargets</literal> script block checks for
collisions between non-managed files and files defined in
<xref linkend="opt-home.file"/>.
</para><para>
A script block should respect the <varname>DRY_RUN</varname>
variable, if it is set then the actions taken by the script
should be logged to standard out and not actually performed.
The variable <varname>DRY_RUN_CMD</varname> is set to
<command>echo</command> if dry run is enabled.
</para><para>
A script block should also respect the
<varname>VERBOSE</varname> variable, and if set print
information on standard out that may be useful for debugging
any issue that may arise. The variable
<varname>VERBOSE_ARG</varname> is set to
<option>--verbose</option> if verbose output is enabled.
'';
};
home.activationPackage = mkOption {
internal = true;
type = types.package;
description = "The package containing the complete activation script.";
};
home.extraActivationPath = mkOption {
internal = true;
type = types.listOf types.package;
default = [ ];
description = ''
Extra packages to add to <envar>PATH</envar> within the activation
script.
'';
};
home.extraBuilderCommands = mkOption {
type = types.lines;
default = "";
internal = true;
description = ''
Extra commands to run in the Home Manager generation builder.
'';
};
home.extraProfileCommands = mkOption {
type = types.lines;
default = "";
internal = true;
description = ''
Extra commands to run in the Home Manager profile builder.
'';
};
home.enableNixpkgsReleaseCheck = mkOption {
type = types.bool;
default = false; # Temporarily disabled until release stabilizes.
description = ''
Determines whether to check for release version mismatch between Home
Manager and Nixpkgs. Using mismatched versions is likely to cause errors
and unexpected behavior. It is therefore highly recommended to use a
release of Home Manager than corresponds with your chosen release of
Nixpkgs.
</para><para>
When this option is enabled and a mismatch is detected then a warning
will be printed when the user configuration is being built.
'';
};
};
config = {
assertions = [
{
assertion = config.home.username != "";
message = "Username could not be determined";
}
{
assertion = config.home.homeDirectory != "";
message = "Home directory could not be determined";
}
];
warnings =
let
hmRelease = fileContents ../.release;
nixpkgsRelease = pkgs.lib.trivial.release;
releaseMismatch =
config.home.enableNixpkgsReleaseCheck
&& hmRelease != nixpkgsRelease;
in
optional releaseMismatch ''
You are using
Home Manager version ${hmRelease} and
Nixpkgs version ${nixpkgsRelease}.
Using mismatched versions is likely to cause errors and unexpected
behavior. It is therefore highly recommended to use a release of Home
Manager than corresponds with your chosen release of Nixpkgs.
If you insist then you can disable this warning by adding
home.enableNixpkgsReleaseCheck = false;
to your configuration.
'';
home.username =
mkIf (versionOlder config.home.stateVersion "20.09")
(mkDefault (builtins.getEnv "USER"));
home.homeDirectory =
mkIf (versionOlder config.home.stateVersion "20.09")
(mkDefault (builtins.getEnv "HOME"));
home.profileDirectory =
if config.submoduleSupport.enable
&& config.submoduleSupport.externalPackageInstall
then "/etc/profiles/per-user/${cfg.username}"
else cfg.homeDirectory + "/.nix-profile";
programs.bash.shellAliases = cfg.shellAliases;
programs.zsh.shellAliases = cfg.shellAliases;
programs.fish.shellAliases = cfg.shellAliases;
home.sessionVariables =
let
maybeSet = n: v: optionalAttrs (v != null) { ${n} = v; };
in
(maybeSet "LANG" cfg.language.base)
//
(maybeSet "LC_CTYPE" cfg.language.ctype)
//
(maybeSet "LC_NUMERIC" cfg.language.numeric)
//
(maybeSet "LC_TIME" cfg.language.time)
//
(maybeSet "LC_COLLATE" cfg.language.collate)
//
(maybeSet "LC_MONETARY" cfg.language.monetary)
//
(maybeSet "LC_MESSAGES" cfg.language.messages)
//
(maybeSet "LC_PAPER" cfg.language.paper)
//
(maybeSet "LC_NAME" cfg.language.name)
//
(maybeSet "LC_ADDRESS" cfg.language.address)
//
(maybeSet "LC_TELEPHONE" cfg.language.telephone)
//
(maybeSet "LC_MEASUREMENT" cfg.language.measurement);
home.packages = [
# Provide a file holding all session variables.
(
pkgs.writeTextFile {
name = "hm-session-vars.sh";
destination = "/etc/profile.d/hm-session-vars.sh";
text = ''
# Only source this once.
if [ -n "$__HM_SESS_VARS_SOURCED" ]; then return; fi
export __HM_SESS_VARS_SOURCED=1
${config.lib.shell.exportAll cfg.sessionVariables}
'' + lib.optionalString (cfg.sessionPath != [ ]) ''
export PATH="$PATH''${PATH:+:}${concatStringsSep ":" cfg.sessionPath}"
'' + cfg.sessionVariablesExtra;
}
)
];
# A dummy entry acting as a boundary between the activation
# script's "check" and the "write" phases.
home.activation.writeBoundary = hm.dag.entryAnywhere "";
# Install packages to the user environment.
#
# Note, sometimes our target may not allow modification of the Nix
# store and then we cannot rely on `nix-env -i`. This is the case,
# for example, if we are running as a NixOS module and building a
# virtual machine. Then we must instead rely on an external
# mechanism for installing packages, which in NixOS is provided by
# the `users.users.<name?>.packages` option. The activation
# command is still needed since some modules need to run their
# activation commands after the packages are guaranteed to be
# installed.
#
# In case the user has moved from a user-install of Home Manager
# to a submodule managed one we attempt to uninstall the
# `home-manager-path` package if it is installed.
home.activation.installPackages = hm.dag.entryAfter ["writeBoundary"] (
if config.submoduleSupport.externalPackageInstall
then
''
if [[ -e $HOME/.nix-profile/manifest.json ]] ; then
nix profile list \
| { grep 'home-manager-path$' || test $? = 1; } \
| cut -d ' ' -f 4 \
| xargs -t $DRY_RUN_CMD nix profile remove $VERBOSE_ARG
else
if nix-env -q | grep '^home-manager-path$'; then
$DRY_RUN_CMD nix-env -e home-manager-path
fi
fi
''
else
''
function nixReplaceProfile() {
local oldNix="$(command -v nix)"
nix profile list \
| { grep 'home-manager-path$' || test $? = 1; } \
| cut -d ' ' -f 4 \
| xargs -t $DRY_RUN_CMD nix profile remove $VERBOSE_ARG
$DRY_RUN_CMD $oldNix profile install $1
}
if [[ -e $HOME/.nix-profile/manifest.json ]] ; then
INSTALL_CMD="nix profile install"
INSTALL_CMD_ACTUAL="nixReplaceProfile"
LIST_CMD="nix profile list"
REMOVE_CMD_SYNTAX='nix profile remove {number | store path}'
else
INSTALL_CMD="nix-env -i"
INSTALL_CMD_ACTUAL="$DRY_RUN_CMD nix-env -i"
LIST_CMD="nix-env -q"
REMOVE_CMD_SYNTAX='nix-env -e {package name}'
fi
if ! $INSTALL_CMD_ACTUAL ${cfg.path} ; then
echo
_iError $'Oops, Nix failed to install your new Home Manager profile!\n\nPerhaps there is a conflict with a package that was installed using\n"%s"? Try running\n\n %s\n\nand if there is a conflicting package you can remove it with\n\n %s\n\nThen try activating your Home Manager configuration again.' "$INSTALL_CMD" "$LIST_CMD" "$REMOVE_CMD_SYNTAX"
exit 1
fi
unset -f nixReplaceProfile
unset INSTALL_CMD INSTALL_CMD_ACTUAL LIST_CMD REMOVE_CMD_SYNTAX
''
);
# Text containing Bash commands that will initialize the Home Manager Bash
# library. Most importantly, this will prepare for using translated strings
# in the `hm-modules` text domain.
lib.bash.initHomeManagerLib =
let
domainDir = pkgs.runCommand "hm-modules-messages" {
nativeBuildInputs = [ pkgs.buildPackages.gettext ];
} ''
for path in ${./po}/*.po; do
lang="''${path##*/}"
lang="''${lang%%.*}"
mkdir -p "$out/$lang/LC_MESSAGES"
msgfmt -o "$out/$lang/LC_MESSAGES/hm-modules.mo" "$path"
done
'';
in
''
export TEXTDOMAIN=hm-modules
export TEXTDOMAINDIR=${domainDir}
source ${../lib/bash/home-manager.sh}
'';
home.activationPackage =
let
mkCmd = res: ''
_iNote "Activating %s" "${res.name}"
${res.data}
'';
sortedCommands = hm.dag.topoSort cfg.activation;
activationCmds =
if sortedCommands ? result then
concatStringsSep "\n" (map mkCmd sortedCommands.result)
else
abort ("Dependency cycle in activation script: "
+ builtins.toJSON sortedCommands);
# Programs that always should be available on the activation
# script's PATH.
activationBinPaths = lib.makeBinPath (
with pkgs; [
bash
coreutils
diffutils # For `cmp` and `diff`.
findutils
gettext
gnugrep
gnused
ncurses # For `tput`.
]
++ config.home.extraActivationPath
)
+ (
# Add path of the Nix binaries, if a Nix package is configured, then
# use that one, otherwise grab the path of the nix-env tool.
if config.nix.enable && config.nix.package != null then
":${config.nix.package}/bin"
else
":$(${pkgs.coreutils}/bin/dirname $(${pkgs.coreutils}/bin/readlink -m $(type -p nix-env)))"
)
+ optionalString (!cfg.emptyActivationPath) "\${PATH:+:}$PATH";
activationScript = pkgs.writeShellScript "activation-script" ''
set -eu
set -o pipefail
cd $HOME
export PATH="${activationBinPaths}"
${config.lib.bash.initHomeManagerLib}
${builtins.readFile ./lib-bash/activation-init.sh}
${activationCmds}
'';
in
pkgs.runCommand
"home-manager-generation"
{
preferLocalBuild = true;
}
''
mkdir -p $out
echo "${config.home.version.full}" > $out/hm-version
cp ${activationScript} $out/activate
mkdir $out/bin
ln -s $out/activate $out/bin/home-manager-generation
substituteInPlace $out/activate \
--subst-var-by GENERATION_DIR $out
ln -s ${config.home-files} $out/home-files
ln -s ${cfg.path} $out/home-path
${cfg.extraBuilderCommands}
'';
home.path = pkgs.buildEnv {
name = "home-manager-path";
paths = cfg.packages;
inherit (cfg) extraOutputsToInstall;
postBuild = cfg.extraProfileCommands;
meta = {
description = "Environment of packages installed through home-manager";
};
};
};
}