From 8ef14f80e3d4d27644dec3d6d47152ae4b40ab07 Mon Sep 17 00:00:00 2001
From: Nikolay Amiantov <ab@fmap.me>
Date: Thu, 2 Feb 2017 00:51:16 +0300
Subject: [PATCH] systemd service: add aliases option

---
 nixos/modules/system/boot/systemd-lib.nix        |  8 +++++++-
 .../modules/system/boot/systemd-unit-options.nix |  6 ++++++
 nixos/modules/system/boot/systemd.nix            | 16 ++++++++--------
 3 files changed, 21 insertions(+), 9 deletions(-)

diff --git a/nixos/modules/system/boot/systemd-lib.nix b/nixos/modules/system/boot/systemd-lib.nix
index 997770b8beca..7dbf3b25cdb0 100644
--- a/nixos/modules/system/boot/systemd-lib.nix
+++ b/nixos/modules/system/boot/systemd-lib.nix
@@ -159,7 +159,13 @@ rec {
         fi
       done
 
-      # Created .wants and .requires symlinks from the wantedBy and
+      # 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: ''
diff --git a/nixos/modules/system/boot/systemd-unit-options.nix b/nixos/modules/system/boot/systemd-unit-options.nix
index 69af23981485..904e41b019fb 100644
--- a/nixos/modules/system/boot/systemd-unit-options.nix
+++ b/nixos/modules/system/boot/systemd-unit-options.nix
@@ -52,6 +52,12 @@ in rec {
       description = "Units that want (i.e. depend on) this unit.";
     };
 
+    aliases = mkOption {
+      default = [];
+      type = types.listOf types.str;
+      description = "Aliases of that unit.";
+    };
+
   };
 
   concreteUnitOptions = sharedOptions // {
diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index a2ee51669715..79779d3b42f6 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -301,7 +301,7 @@ let
     '';
 
   targetToUnit = name: def:
-    { inherit (def) wantedBy requiredBy enable;
+    { inherit (def) aliases wantedBy requiredBy enable;
       text =
         ''
           [Unit]
@@ -310,7 +310,7 @@ let
     };
 
   serviceToUnit = name: def:
-    { inherit (def) wantedBy requiredBy enable;
+    { inherit (def) aliases wantedBy requiredBy enable;
       text = commonUnitText def +
         ''
           [Service]
@@ -330,7 +330,7 @@ let
     };
 
   socketToUnit = name: def:
-    { inherit (def) wantedBy requiredBy enable;
+    { inherit (def) aliases wantedBy requiredBy enable;
       text = commonUnitText def +
         ''
           [Socket]
@@ -340,7 +340,7 @@ let
     };
 
   timerToUnit = name: def:
-    { inherit (def) wantedBy requiredBy enable;
+    { inherit (def) aliases wantedBy requiredBy enable;
       text = commonUnitText def +
         ''
           [Timer]
@@ -349,7 +349,7 @@ let
     };
 
   pathToUnit = name: def:
-    { inherit (def) wantedBy requiredBy enable;
+    { inherit (def) aliases wantedBy requiredBy enable;
       text = commonUnitText def +
         ''
           [Path]
@@ -358,7 +358,7 @@ let
     };
 
   mountToUnit = name: def:
-    { inherit (def) wantedBy requiredBy enable;
+    { inherit (def) aliases wantedBy requiredBy enable;
       text = commonUnitText def +
         ''
           [Mount]
@@ -367,7 +367,7 @@ let
     };
 
   automountToUnit = name: def:
-    { inherit (def) wantedBy requiredBy enable;
+    { inherit (def) aliases wantedBy requiredBy enable;
       text = commonUnitText def +
         ''
           [Automount]
@@ -376,7 +376,7 @@ let
     };
 
   sliceToUnit = name: def:
-    { inherit (def) wantedBy requiredBy enable;
+    { inherit (def) aliases wantedBy requiredBy enable;
       text = commonUnitText def +
         ''
           [Slice]