Remove accounts.<name>.aliases and rename extraVirtualAliases to virtualAccountAliases

In order to simplify configuration and reduce configuration variability,
this commit removes the option to directly add aliases to each single
mail account. Instead, aliaes should be centrally configured using the
option 'virtualAccountAliases'.

mailsystem/default.nix

@@ -92,17 +92,6 @@ in {
             '';
           };
 
-          aliases = lib.mkOption {
-            type = with lib.types; listOf types.str;
-            example = ["abuse@example.com" "postmaster@example.com"];
-            default = [];
-            description = ''
-              A list of aliases of this login account.
-              Note: Use list entries like "@example.com" to create a catchAll
-              that allows sending from all email addresses in these domain.
-            '';
-          };
-
           isSystemUser = lib.mkOption {
             type = lib.types.bool;
             default = false;
@@ -153,7 +142,7 @@ in {
       default = {};
     };
 
-    extraVirtualAliases = lib.mkOption {
+    virtualAccountAliases = lib.mkOption {
       type = let
         account = lib.mkOptionType {
           name = "Mail Account";

mailsystem/postfix.nix

@@ -21,25 +21,15 @@ with (import ./common.nix {inherit config;}); let
 
   mergeLookupTables = tables: lib.zipAttrsWith (n: v: lib.flatten v) tables;
 
-  account_virtual_aliases = mergeLookupTables (lib.flatten (lib.mapAttrsToList
-    (name: value: let
-      to = name;
-    in
-      map (from: {"${from}" = to;}) (value.aliases ++ lib.singleton name))
-    cfg.accounts));
+  virtual_accounts = mergeLookupTables (lib.map (name: {"${name}" = name;}) (lib.attrNames cfg.accounts));
+  virtual_account_aliases = attrsToLookupTable cfg.virtualAccountAliases;
 
   virtual_domain_aliases = let
-    alias_domains =
-      lib.concatMapAttrs (src: dst: {
-        "@${src}" = "@${dst}";
-      })
-      cfg.virtualDomainAliases;
+    alias_domains = lib.mapAttrs' (src: dst: lib.nameValuePair "@${src}" "@${dst}") cfg.virtualDomainAliases;
   in
     attrsToLookupTable alias_domains;
 
-  extra_virtual_aliases = attrsToLookupTable cfg.extraVirtualAliases;
-
-  all_virtual_aliases = mergeLookupTables [account_virtual_aliases virtual_domain_aliases extra_virtual_aliases];
+  all_virtual_aliases = mergeLookupTables [virtual_accounts virtual_account_aliases virtual_domain_aliases];
 
   aliases_file = let
     content = lookupTableToString all_virtual_aliases;

tests/aliases.nix

@@ -1,5 +1,6 @@
 {pkgs, ...}:
 with (import ./common/lib.nix {inherit pkgs;}); let
+  lib = pkgs.lib;
   accounts = {
     "normal" = {
       address = "user1@example.com";
@@ -11,32 +12,23 @@ with (import ./common/lib.nix {inherit pkgs;}); let
     };
     "alias" = {
       address = "user3@example.com";
-      aliases = ["alias@example.com"];
       password = "secret-password3";
     };
-    "extra-alias" = {
-      address = "user4@example.com";
-      password = "secret-password4;";
-    };
     "multi-alias1" = {
       address = "multi-alias1@example.com";
-      aliases = ["multi-alias@example.com"];
-      password = "secret-password5;";
+      password = "secret-password4;";
     };
     "multi-alias2" = {
       address = "multi-alias2@example.com";
-      aliases = ["multi-alias@example.com"];
-      password = "secret-password6;";
+      password = "secret-password5;";
     };
     "catchall" = {
       address = "catchall@example.com";
-      aliases = ["@example.com"];
-      password = "secret-password7;";
+      password = "secret-password6;";
     };
     "otherdomain" = {
       address = "otherdomain@example.com";
-      aliases = ["user@otherdomain.com"];
-      password = "secret-password8;";
+      password = "secret-password7;";
     };
   };
 in
@@ -53,8 +45,11 @@ in
           virtualDomainAliases = {
             "aliased.com" = "example.com";
           };
-          extraVirtualAliases = {
-            "extra-alias@example.com" = accounts."extra-alias".address;
+          virtualAccountAliases = {
+            "alias@example.com" = accounts."alias".address;
+            "multi-alias@example.com" = lib.map (x: accounts.${x}.address) ["multi-alias1" "multi-alias2"];
+            "@example.com" = accounts."catchall".address;
+            "user@otherdomain.com" = accounts."otherdomain".address;
           };
         };
       };
@@ -182,18 +177,6 @@ in
           # fetchmail returns EXIT_CODE 0 when it retrieves mail
           client.succeed("${recvMail "otherdomain"} >&2")
 
-      with subtest("mail incoming on extraVirtualAlias"):
-          client.succeed("${sendMail "normal" "" "extra-alias@example.com" ''
-        Subject: extraVirtualAliases-Test
-
-        Hello User4,
-        this is mail is sent to you by using an extraVirtualAlias as recipient.
-      ''}")
-          server.wait_until_fails('${pendingPostqueue}')
-          client.execute("${cleanupMail}")
-          # fetchmail returns EXIT_CODE 0 when it retrieves mail
-          client.succeed("${recvMail "extra-alias"} >&2")
-
       with subtest("receiving mail on aliased domain using normal account"):
           client.succeed("${sendMail "normal" "" "user2@aliased.com" ''
         Subject: aliasedDomain with normal account