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authorMinijackson <minijackson@riseup.net>2022-09-01 14:43:59 +0200
committerRaito Bezarius <masterancpp@gmail.com>2023-12-09 01:50:23 +0100
commitad586e6bebef46d3a2e61751b5e028dd261556b3 (patch)
tree79c6700753a4328cff3a43a7b7f219aabbdc27c1 /pkgs/pkgs-lib/formats.nix
parentf9a1ba6987b55de1ab9836af799028ade39168e5 (diff)
formats.systemd: init INI-style systemd config file format
Diffstat (limited to 'pkgs/pkgs-lib/formats.nix')
-rw-r--r--pkgs/pkgs-lib/formats.nix14
1 files changed, 14 insertions, 0 deletions
diff --git a/pkgs/pkgs-lib/formats.nix b/pkgs/pkgs-lib/formats.nix
index 3cbda3a7ebdd9..950547c4f001a 100644
--- a/pkgs/pkgs-lib/formats.nix
+++ b/pkgs/pkgs-lib/formats.nix
@@ -142,6 +142,20 @@ rec {
 
   };
 
+  # As defined by systemd.syntax(7)
+  #
+  # null does not set any value, which allows for RFC42 modules to specify
+  # optional config options.
+  systemd = let
+    mkValueString = lib.generators.mkValueStringDefault {};
+    mkKeyValue = k: v:
+      if v == null then "# ${k} is unset"
+      else "${k} = ${mkValueString v}";
+  in ini {
+    listsAsDuplicateKeys = true;
+    inherit mkKeyValue;
+  };
+
   keyValue = {
     # Represents lists as duplicate keys
     listsAsDuplicateKeys ? false,