238 lines
7.8 KiB
Nix
238 lines
7.8 KiB
Nix
{ config, lib, pkgs }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
cfg = config.systemd;
|
|
lndir = "${pkgs.buildPackages.xorg.lndir}/bin/lndir";
|
|
in rec {
|
|
|
|
shellEscape = s: (replaceChars [ "\\" ] [ "\\\\" ] s);
|
|
|
|
mkPathSafeName = lib.replaceChars ["@" ":" "\\" "[" "]"] ["-" "-" "-" "" ""];
|
|
|
|
# a type for options that take a unit name
|
|
unitNameType = types.strMatching "[a-zA-Z0-9@%:_.\\-]+[.](service|socket|device|mount|automount|swap|target|path|timer|scope|slice)";
|
|
|
|
makeUnit = name: unit:
|
|
if unit.enable then
|
|
pkgs.runCommand "unit-${mkPathSafeName name}"
|
|
{ preferLocalBuild = true;
|
|
allowSubstitutes = false;
|
|
inherit (unit) text;
|
|
}
|
|
''
|
|
mkdir -p $out
|
|
echo -n "$text" > $out/${shellEscape name}
|
|
''
|
|
else
|
|
pkgs.runCommand "unit-${mkPathSafeName name}-disabled"
|
|
{ preferLocalBuild = true;
|
|
allowSubstitutes = false;
|
|
}
|
|
''
|
|
mkdir -p $out
|
|
ln -s /dev/null $out/${shellEscape name}
|
|
'';
|
|
|
|
boolValues = [true false "yes" "no"];
|
|
|
|
digits = map toString (range 0 9);
|
|
|
|
isByteFormat = s:
|
|
let
|
|
l = reverseList (stringToCharacters s);
|
|
suffix = head l;
|
|
nums = tail l;
|
|
in elem suffix (["K" "M" "G" "T"] ++ digits)
|
|
&& all (num: elem num digits) nums;
|
|
|
|
assertByteFormat = name: group: attr:
|
|
optional (attr ? ${name} && ! isByteFormat attr.${name})
|
|
"Systemd ${group} field `${name}' must be in byte format [0-9]+[KMGT].";
|
|
|
|
hexChars = stringToCharacters "0123456789abcdefABCDEF";
|
|
|
|
isMacAddress = s: stringLength s == 17
|
|
&& flip all (splitString ":" s) (bytes:
|
|
all (byte: elem byte hexChars) (stringToCharacters bytes)
|
|
);
|
|
|
|
assertMacAddress = name: group: attr:
|
|
optional (attr ? ${name} && ! isMacAddress attr.${name})
|
|
"Systemd ${group} field `${name}' must be a valid mac address.";
|
|
|
|
isPort = i: i >= 0 && i <= 65535;
|
|
|
|
assertPort = name: group: attr:
|
|
optional (attr ? ${name} && ! isPort attr.${name})
|
|
"Error on the systemd ${group} field `${name}': ${attr.name} is not a valid port number.";
|
|
|
|
assertValueOneOf = name: values: group: attr:
|
|
optional (attr ? ${name} && !elem attr.${name} values)
|
|
"Systemd ${group} field `${name}' cannot have value `${toString attr.${name}}'.";
|
|
|
|
assertHasField = name: group: attr:
|
|
optional (!(attr ? ${name}))
|
|
"Systemd ${group} field `${name}' must exist.";
|
|
|
|
assertRange = name: min: max: group: attr:
|
|
optional (attr ? ${name} && !(min <= attr.${name} && max >= attr.${name}))
|
|
"Systemd ${group} field `${name}' is outside the range [${toString min},${toString max}]";
|
|
|
|
assertMinimum = name: min: group: attr:
|
|
optional (attr ? ${name} && attr.${name} < min)
|
|
"Systemd ${group} field `${name}' must be greater than or equal to ${toString min}";
|
|
|
|
assertOnlyFields = fields: group: attr:
|
|
let badFields = filter (name: ! elem name fields) (attrNames attr); in
|
|
optional (badFields != [ ])
|
|
"Systemd ${group} has extra fields [${concatStringsSep " " badFields}].";
|
|
|
|
assertInt = name: group: attr:
|
|
optional (attr ? ${name} && !isInt attr.${name})
|
|
"Systemd ${group} field `${name}' is not an integer";
|
|
|
|
checkUnitConfig = group: checks: attrs: let
|
|
# We're applied at the top-level type (attrsOf unitOption), so the actual
|
|
# unit options might contain attributes from mkOverride and mkIf that we need to
|
|
# convert into single values before checking them.
|
|
defs = mapAttrs (const (v:
|
|
if v._type or "" == "override" then v.content
|
|
else if v._type or "" == "if" then v.content
|
|
else v
|
|
)) attrs;
|
|
errors = concatMap (c: c group defs) checks;
|
|
in if errors == [] then true
|
|
else builtins.trace (concatStringsSep "\n" errors) false;
|
|
|
|
toOption = x:
|
|
if x == true then "true"
|
|
else if x == false then "false"
|
|
else toString x;
|
|
|
|
attrsToSection = as:
|
|
concatStrings (concatLists (mapAttrsToList (name: value:
|
|
map (x: ''
|
|
${name}=${toOption x}
|
|
'')
|
|
(if isList value then value else [value]))
|
|
as));
|
|
|
|
generateUnits = generateUnits' true;
|
|
|
|
generateUnits' = allowCollisions: type: units: upstreamUnits: upstreamWants:
|
|
pkgs.runCommand "${type}-units"
|
|
{ preferLocalBuild = true;
|
|
allowSubstitutes = false;
|
|
} ''
|
|
mkdir -p $out
|
|
|
|
# Copy the upstream systemd units we're interested in.
|
|
for i in ${toString upstreamUnits}; do
|
|
fn=${cfg.package}/example/systemd/${type}/$i
|
|
if ! [ -e $fn ]; then echo "missing $fn"; false; fi
|
|
if [ -L $fn ]; then
|
|
target="$(readlink "$fn")"
|
|
if [ ''${target:0:3} = ../ ]; then
|
|
ln -s "$(readlink -f "$fn")" $out/
|
|
else
|
|
cp -pd $fn $out/
|
|
fi
|
|
else
|
|
ln -s $fn $out/
|
|
fi
|
|
done
|
|
|
|
# Copy .wants links, but only those that point to units that
|
|
# we're interested in.
|
|
for i in ${toString upstreamWants}; do
|
|
fn=${cfg.package}/example/systemd/${type}/$i
|
|
if ! [ -e $fn ]; then echo "missing $fn"; false; fi
|
|
x=$out/$(basename $fn)
|
|
mkdir $x
|
|
for i in $fn/*; do
|
|
y=$x/$(basename $i)
|
|
cp -pd $i $y
|
|
if ! [ -e $y ]; then rm $y; fi
|
|
done
|
|
done
|
|
|
|
# Symlink all units provided listed in systemd.packages.
|
|
packages="${toString cfg.packages}"
|
|
|
|
# Filter duplicate directories
|
|
declare -A unique_packages
|
|
for k in $packages ; do unique_packages[$k]=1 ; done
|
|
|
|
for i in ''${!unique_packages[@]}; do
|
|
for fn in $i/etc/systemd/${type}/* $i/lib/systemd/${type}/*; do
|
|
if ! [[ "$fn" =~ .wants$ ]]; then
|
|
if [[ -d "$fn" ]]; then
|
|
targetDir="$out/$(basename "$fn")"
|
|
mkdir -p "$targetDir"
|
|
${lndir} "$fn" "$targetDir"
|
|
else
|
|
ln -s $fn $out/
|
|
fi
|
|
fi
|
|
done
|
|
done
|
|
|
|
# Symlink all units defined by systemd.units. If these are also
|
|
# provided by systemd or systemd.packages, then add them as
|
|
# <unit-name>.d/overrides.conf, which makes them extend the
|
|
# upstream unit.
|
|
for i in ${toString (mapAttrsToList (n: v: v.unit) units)}; do
|
|
fn=$(basename $i/*)
|
|
if [ -e $out/$fn ]; then
|
|
if [ "$(readlink -f $i/$fn)" = /dev/null ]; then
|
|
ln -sfn /dev/null $out/$fn
|
|
else
|
|
${if allowCollisions then ''
|
|
mkdir -p $out/$fn.d
|
|
ln -s $i/$fn $out/$fn.d/overrides.conf
|
|
'' else ''
|
|
echo "Found multiple derivations configuring $fn!"
|
|
exit 1
|
|
''}
|
|
fi
|
|
else
|
|
ln -fs $i/$fn $out/
|
|
fi
|
|
done
|
|
|
|
# Create service aliases from aliases option.
|
|
${concatStrings (mapAttrsToList (name: unit:
|
|
concatMapStrings (name2: ''
|
|
ln -sfn '${name}' $out/'${name2}'
|
|
'') unit.aliases) units)}
|
|
|
|
# Create .wants and .requires symlinks from the wantedBy and
|
|
# requiredBy options.
|
|
${concatStrings (mapAttrsToList (name: unit:
|
|
concatMapStrings (name2: ''
|
|
mkdir -p $out/'${name2}.wants'
|
|
ln -sfn '../${name}' $out/'${name2}.wants'/
|
|
'') unit.wantedBy) units)}
|
|
|
|
${concatStrings (mapAttrsToList (name: unit:
|
|
concatMapStrings (name2: ''
|
|
mkdir -p $out/'${name2}.requires'
|
|
ln -sfn '../${name}' $out/'${name2}.requires'/
|
|
'') unit.requiredBy) units)}
|
|
|
|
${optionalString (type == "system") ''
|
|
# Stupid misc. symlinks.
|
|
ln -s ${cfg.defaultUnit} $out/default.target
|
|
ln -s ${cfg.ctrlAltDelUnit} $out/ctrl-alt-del.target
|
|
ln -s rescue.target $out/kbrequest.target
|
|
|
|
mkdir -p $out/getty.target.wants/
|
|
ln -s ../autovt@tty1.service $out/getty.target.wants/
|
|
|
|
ln -s ../remote-fs.target $out/multi-user.target.wants/
|
|
''}
|
|
''; # */
|
|
|
|
}
|