made mailsrv mkvirt script test if sieve scripts compile

src/mailsrv/assets/bin/mkvirt

@@ -1,8 +1,5 @@
 #!/bin/sh
 
-# fail immediately if any command fails
-set -e
-
 ### Users ###
 
 # copy users db to dovecot config
@@ -26,7 +23,14 @@ postmap aliases
 cd /vol/data/sieve.d
 for user in * ; do
   mkdir -p /vol/mail/${user}
-  chown vmail:vmail /vol/mail/${user}
-  chown vmail:vmail ${user}
+  chown vmail:vmail /vol/mail/${user} ${user}
+  echo "Testing ${user}'s sieve script for compilation errors..."
+  sievec ${user} -d - > /dev/null
+  if [ $? -eq 0 ]; then
+    echo "No errors detected."
+  else
+    echo "Compilation errors detected in ${user}'s sieve script. Please correct any errors and run $(basename $0) again."
+    exit 2
+  fi
   cp -p ${user} /vol/mail/${user}/.dovecot.sieve
 done