home-environment: use DAG type in activation option

modules/home-environment.nix

@@ -7,6 +7,7 @@ let
   cfg = config.home;
 
   dag = config.lib.dag;
+  dagOf = (import ./lib/types.nix { inherit dag lib; }).dagOf;
 
   languageSubModule = types.submodule {
     options = {
@@ -235,8 +236,8 @@ in
 
     home.activation = mkOption {
       internal = true;
+      type = dagOf types.str;
       default = {};
-      type = types.attrs;
       description = ''
         Activation scripts for the home environment.
         </para><para>

tests/lib/types/dag-merge.nix

@@ -23,7 +23,7 @@ in
 
   config = {
     tested = mkMerge [
-      { dag.after = dag.entryAnywhere "after"; }
+      { dag.after = "after"; }
       { dag.before = dag.entryBefore ["after"] "before"; }
       { dag.between = dag.entryBetween ["after"] ["before"] "between"; }
     ];

tests/lib/types/list-or-dag-merge.nix

@@ -25,7 +25,7 @@ in
     tested = mkMerge [
       { dag = [ "k" "l" ]; }
       { dag = [ "a" "b" "c" "d" "e" "f" "g" "h" "i" "j" ]; }
-      { dag.after = dag.entryAnywhere "after"; }
+      { dag.after = "after"; }
       { dag.before = dag.entryBefore ["after"] "before"; }
       { dag.between = dag.entryBetween ["after"] ["before"] "between"; }
     ];