Merge branch 'sieve-migration' into 'main'

sieve: move `cfg.sieveDirectory` into home directory of virtual users

See merge request simple-nixos-mailserver/nixos-mailserver!508

tests/internal.nix

@@ -61,7 +61,7 @@ in
 
   nodes = {
     machine =
-      { pkgs, ... }:
+      { pkgs, lib, ... }:
       {
         imports = [
           ./../default.nix
@@ -111,6 +111,7 @@ in
             };
             "user3@example.com" = {
               passwordFile = "/run/passwords/user3";
+              sieveScript = lib.readFile ./lib/redirect.sieve;
             };
             "user4@example.com" = {
               hashedPasswordFile = hashedPasswordFileWithScheme;
@@ -292,6 +293,27 @@ in
               )
           )
 
+      with subtest("user's static Sieve script is being executed"):
+          # user3@example.com has a cfg.sieveScript that forwards every
+          # mail sent from user1@example.com back to user1@example.com
+          machine.succeed(
+              " ".join(
+                  [
+                      "mail-check send-and-read",
+                      "--smtp-port 587",
+                      "--smtp-starttls",
+                      "--smtp-host localhost",
+                      "--imap-host localhost",
+                      "--imap-username user1@example.com",
+                      "--from-addr user1@example.com",
+                      "--to-addr user3@example.com",
+                      "--src-password-file ${passwordFile}",
+                      "--dst-password-file ${passwordFile}",
+                      "--ignore-dkim-spf",
+                  ]
+              )
+          )
+
       with subtest("imap port 143 is closed and imaps is serving SSL"):
           machine.wait_for_closed_port(143)
           machine.wait_for_open_port(993)

tests/lib/redirect.sieve

@@ -0,0 +1,3 @@
+if address :is "from" "user1@example.com" {
+  redirect "user1@example.com";
+}