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|
{ config, lib, pkgs, ... }:
with lib;
with import ./lib/dag.nix { inherit lib; };
let
cfg = config.systemd.user;
enabled = cfg.services != {}
|| cfg.sockets != {}
|| cfg.targets != {}
|| cfg.timers != {};
toSystemdIni = generators.toINI {
mkKeyValue = key: value:
let
value' =
if isBool value then (if value then "true" else "false")
else toString value;
in
"${key}=${value'}";
};
buildService = style: name: serviceCfg:
let
source = pkgs.writeText "${name}.${style}" (toSystemdIni serviceCfg);
wantedBy = target:
{
name = ".config/systemd/user/${target}.wants/${name}.${style}";
value = { inherit source; };
};
in
singleton {
name = ".config/systemd/user/${name}.${style}";
value = { inherit source; };
}
++
map wantedBy (serviceCfg.Install.WantedBy or []);
buildServices = style: serviceCfgs:
concatLists (mapAttrsToList (buildService style) serviceCfgs);
in
{
meta.maintainers = [ maintainers.rycee ];
options = {
systemd.user = {
services = mkOption {
default = {};
type = types.attrs;
description = "Definition of systemd per-user service units.";
};
sockets = mkOption {
default = {};
type = types.attrs;
description = "Definition of systemd per-user sockets";
};
targets = mkOption {
default = {};
type = types.attrs;
description = "Definition of systemd per-user targets";
};
timers = mkOption {
default = {};
type = types.attrs;
description = "Definition of systemd per-user timers";
};
};
};
config = mkMerge [
{
assertions = [
{
assertion = enabled -> pkgs.stdenv.isLinux;
message =
let
names = concatStringsSep ", " (
attrNames (
cfg.services // cfg.sockets // cfg.targets // cfg.timers
)
);
in
"Must use Linux for modules that require systemd: " + names;
}
];
}
# If we run under a Linux system we assume that systemd is
# available, in particular we assume that systemctl is in PATH.
(mkIf pkgs.stdenv.isLinux {
home.file =
listToAttrs (
(buildServices "service" cfg.services)
++
(buildServices "socket" cfg.sockets)
++
(buildServices "target" cfg.targets)
++
(buildServices "timer" cfg.timers)
);
home.activation.reloadSystemD = dagEntryAfter ["linkGeneration"] ''
function systemdPostReload() {
local workDir
workDir="$(mktemp -d)"
if [[ -v oldGenPath ]] ; then
local oldUserServicePath="$oldGenPath/home-files/.config/systemd/user"
fi
local newUserServicePath="$newGenPath/home-files/.config/systemd/user"
local oldServiceFiles="$workDir/old-files"
local newServiceFiles="$workDir/new-files"
local servicesDiffFile="$workDir/diff-files"
if [[ ! (-v oldUserServicePath && -d "$oldUserServicePath") \
&& ! -d "$newUserServicePath" ]]; then
return
fi
if [[ ! (-v oldUserServicePath && -d "$oldUserServicePath") ]]; then
touch "$oldServiceFiles"
else
find "$oldUserServicePath" \
-maxdepth 1 -name '*.service' -exec basename '{}' ';' \
| sort \
> "$oldServiceFiles"
fi
if [[ ! -d "$newUserServicePath" ]]; then
touch "$newServiceFiles"
else
find "$newUserServicePath" \
-maxdepth 1 -name '*.service' -exec basename '{}' ';' \
| sort \
> "$newServiceFiles"
fi
diff \
--new-line-format='+%L' \
--old-line-format='-%L' \
--unchanged-line-format=' %L' \
"$oldServiceFiles" "$newServiceFiles" \
> $servicesDiffFile || true
local -a maybeRestart=( $(grep '^ ' $servicesDiffFile | cut -c2-) )
local -a toStop=( $(grep '^-' $servicesDiffFile | cut -c2-) )
local -a toStart=( $(grep '^+' $servicesDiffFile | cut -c2-) )
local -a toRestart=( )
for f in ''${maybeRestart[@]} ; do
if systemctl --quiet --user is-active "$f" \
&& ! cmp --quiet \
"$oldUserServicePath/$f" \
"$newUserServicePath/$f" ; then
toRestart+=("$f")
fi
done
rm -r $workDir
local sugg=""
if [[ -n "''${toRestart[@]}" ]] ; then
sugg="''${sugg}systemctl --user restart ''${toRestart[@]}\n"
fi
if [[ -n "''${toStop[@]}" ]] ; then
sugg="''${sugg}systemctl --user stop ''${toStop[@]}\n"
fi
if [[ -n "''${toStart[@]}" ]] ; then
sugg="''${sugg}systemctl --user start ''${toStart[@]}\n"
fi
if [[ -n "$sugg" ]] ; then
echo "Suggested commands:"
echo -n -e "$sugg"
fi
}
$DRY_RUN_CMD systemctl --user daemon-reload
systemdPostReload
'';
})
];
}
|
