nixos: services: direnv: refactor and prune direnvs

1 files changed, 37 insertions, 25 deletions

diff --git a/nixos/services.nix b/nixos/services.nix
index 1d9d850..f0a04ef 100644
--- a/nixos/services.nix
+++ b/nixos/services.nix
@@ -1,28 +1,9 @@
 { lib, config, pkgs, ... }:
 
 let
-  direnv-reload-service = user: {
-    description = "Update virtual environments of user ${user}";
-
-    restartIfChanged = false;
-    unitConfig.X-StopOnRemoval = false;
-    serviceConfig = {
-      Type = "oneshot";
-      User = user;
-    };
-
-    environment = {
-      inherit (config.environment.sessionVariables) NIX_PATH;
-      HOME = config.users.users."${user}".home;
-    };
-
-    path = with pkgs; [ direnv ];
-    script = ''
-       find $HOME -type d -name .nix-gc-roots -execdir direnv exec . true \;
-    '';
-
-    after = [ "nixos-upgrade.service" ];
-    wantedBy = [ "nixos-upgrade.service" ];
+  userService = user: {
+    serviceConfig.User = user;
+    environment.HOME = config.users.users."${user}".home;
   };
 in {
   # List services that you want to enable:
@@ -30,9 +11,40 @@ in {
   # Enable the OpenSSH daemon.
   # services.openssh.enable = true;
 
-  systemd.services.direnv-reload = lib.mkIf config.system.autoUpgrade.enable
-    (direnv-reload-service "qaristote");
-  systemd.services.nix-gc.after = [ "direnv-reload.service" ];
+  systemd.services = {
+    direnv-reload = {
+      enable = true;
+      description = "Update virtual environments of user qaristote";
+
+      restartIfChanged = false;
+      unitConfig.X-StopOnRemoval = false;
+      serviceConfig.Type = "oneshot";
+
+      environment.NIX_PATH = config.environment.sessionVariables.NIX_PATH;
+
+      path = with pkgs; [ direnv ];
+      script =
+        "find $HOME -type d -name .nix-gc-roots -execdir direnv exec . true \\;";
+
+      after =
+        lib.mkIf config.system.autoUpgrade.enable [ "nixos-upgrade.service" ];
+      requiredBy =
+        lib.mkIf config.system.autoUpgrade.enable [ "nixos-upgrade.service" ];
+    } // (userService "qaristote");
+    direnv-prune = {
+      enable = true;
+      description = "Clean virtual environments of user qaristote";
+
+      serviceConfig.Type = "oneshot";
+
+      path = with pkgs; [ direnv ];
+      script = "find $HOME -type d -name .direnv -execdir direnv prune \\;";
+
+      after = [ "direnv-reload.service" ];
+      before = lib.mkIf config.nix.gc.automatic [ "nix-gc.service" ];
+      requiredBy = lib.mkIf config.nix.gc.automatic [ "nix-gc.service" ];
+    } // (userService "qaristote");
+  };
 
   # virtualisation.docker.enable = true;
 }