legacy: implement "*" for salt-pillar lookup

nix/lib/config/legacy.nix

@@ -2,7 +2,7 @@
 
 let
   mainServer = "server1";
-  pillar = self.lib.saltPillarFor mainServer;
+  pillar = self.lib.saltPillarFor "*";
 
   renameAttr = from: to: attrset:
     builtins.foldl' (result: name:

nix/lib/salt-support/salt-pillar.nix

@@ -12,15 +12,19 @@ let
   globToRegex = builtins.replaceStrings ["*"] [".*"];
 
   baseMatches =
-    builtins.filter (patterns:
-      pkgs.lib.any (pattern:
-        builtins.match (globToRegex pattern) hostName != null
-      ) (
-        builtins.filter builtins.isString (
-          builtins.split " or " patterns
+    if hostName == "*"
+    then
+      builtins.attrNames pillarBase
+    else
+      builtins.filter (patterns:
+        pkgs.lib.any (pattern:
+          builtins.match (globToRegex pattern) hostName != null
+        ) (
+          builtins.filter builtins.isString (
+            builtins.split " or " patterns
+          )
         )
-      )
-    ) (builtins.attrNames pillarBase);
+      ) (builtins.attrNames pillarBase);
 
   fileIds = builtins.foldl' (result: matchName:
     result ++ pillarBase.${matchName}