nixos: Add unit option overrideStrategy
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@ -187,11 +187,14 @@ in rec {
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done
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done
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done
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done
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# Symlink all units defined by systemd.units. If these are also
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# Symlink units defined by systemd.units where override strategy
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# provided by systemd or systemd.packages, then add them as
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# shall be automatically detected. If these are also provided by
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# systemd or systemd.packages, then add them as
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# <unit-name>.d/overrides.conf, which makes them extend the
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# <unit-name>.d/overrides.conf, which makes them extend the
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# upstream unit.
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# upstream unit.
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for i in ${toString (mapAttrsToList (n: v: v.unit) units)}; do
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for i in ${toString (mapAttrsToList
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(n: v: v.unit)
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(lib.filterAttrs (n: v: (attrByPath [ "overrideStrategy" ] "asDropinIfExists" v) == "asDropinIfExists") units))}; do
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fn=$(basename $i/*)
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fn=$(basename $i/*)
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if [ -e $out/$fn ]; then
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if [ -e $out/$fn ]; then
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if [ "$(readlink -f $i/$fn)" = /dev/null ]; then
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if [ "$(readlink -f $i/$fn)" = /dev/null ]; then
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@ -210,6 +213,16 @@ in rec {
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fi
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fi
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done
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done
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# Symlink units defined by systemd.units which shall be
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# treated as drop-in file.
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for i in ${toString (mapAttrsToList
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(n: v: v.unit)
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(lib.filterAttrs (n: v: v ? overrideStrategy && v.overrideStrategy == "asDropin") units))}; do
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fn=$(basename $i/*)
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mkdir -p $out/$fn.d
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ln -s $i/$fn $out/$fn.d/overrides.conf
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done
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# Create service aliases from aliases option.
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# Create service aliases from aliases option.
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${concatStrings (mapAttrsToList (name: unit:
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${concatStrings (mapAttrsToList (name: unit:
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concatMapStrings (name2: ''
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concatMapStrings (name2: ''
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@ -340,7 +353,7 @@ in rec {
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'';
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'';
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targetToUnit = name: def:
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targetToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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{ inherit (def) aliases wantedBy requiredBy enable overrideStrategy;
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text =
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text =
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''
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''
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[Unit]
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[Unit]
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@ -349,7 +362,7 @@ in rec {
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};
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};
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serviceToUnit = name: def:
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serviceToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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{ inherit (def) aliases wantedBy requiredBy enable overrideStrategy;
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text = commonUnitText def +
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text = commonUnitText def +
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''
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''
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[Service]
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[Service]
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@ -371,7 +384,7 @@ in rec {
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};
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};
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socketToUnit = name: def:
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socketToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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{ inherit (def) aliases wantedBy requiredBy enable overrideStrategy;
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text = commonUnitText def +
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text = commonUnitText def +
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''
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''
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[Socket]
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[Socket]
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@ -382,7 +395,7 @@ in rec {
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};
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};
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timerToUnit = name: def:
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timerToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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{ inherit (def) aliases wantedBy requiredBy enable overrideStrategy;
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text = commonUnitText def +
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text = commonUnitText def +
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''
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''
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[Timer]
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[Timer]
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@ -391,7 +404,7 @@ in rec {
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};
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};
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pathToUnit = name: def:
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pathToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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{ inherit (def) aliases wantedBy requiredBy enable overrideStrategy;
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text = commonUnitText def +
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text = commonUnitText def +
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''
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''
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[Path]
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[Path]
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@ -400,7 +413,7 @@ in rec {
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};
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};
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mountToUnit = name: def:
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mountToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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{ inherit (def) aliases wantedBy requiredBy enable overrideStrategy;
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text = commonUnitText def +
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text = commonUnitText def +
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''
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''
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[Mount]
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[Mount]
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@ -409,7 +422,7 @@ in rec {
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};
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};
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automountToUnit = name: def:
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automountToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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{ inherit (def) aliases wantedBy requiredBy enable overrideStrategy;
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text = commonUnitText def +
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text = commonUnitText def +
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''
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''
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[Automount]
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[Automount]
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@ -418,7 +431,7 @@ in rec {
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};
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};
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sliceToUnit = name: def:
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sliceToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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{ inherit (def) aliases wantedBy requiredBy enable overrideStrategy;
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text = commonUnitText def +
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text = commonUnitText def +
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''
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''
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[Slice]
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[Slice]
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@ -48,6 +48,22 @@ in rec {
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'';
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'';
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};
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};
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overrideStrategy = mkOption {
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default = "asDropinIfExists";
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type = types.enum [ "asDropinIfExists" "asDropin" ];
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description = lib.mdDoc ''
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Defines how unit configuration is provided for systemd:
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`asDropinIfExists` creates a unit file when no unit file is provided by the package
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otherwise a drop-in file name `overrides.conf`.
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`asDropin` creates a drop-in file named `overrides.conf`.
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Mainly needed to define instances for systemd template units (e.g. `systemd-nspawn@mycontainer.service`).
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See also systemd.unit(1).
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'';
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};
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requiredBy = mkOption {
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requiredBy = mkOption {
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default = [];
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default = [];
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type = types.listOf unitNameType;
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type = types.listOf unitNameType;
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