Allow disabling amavis service

Setting the `DISABLE_AMAVIS=1` env var will skip the starting of the
amavis process.

Makefile

@@ -48,6 +48,12 @@ run:
 		-e ENABLE_FAIL2BAN=1 \
 		--cap-add=NET_ADMIN \
 		-h mail.my-domain.com -t $(NAME)
+	sleep 20
+	docker run -d --name mail_disabled_amavis \
+		-v "`pwd`/test/config":/tmp/docker-mailserver \
+		-v "`pwd`/test":/tmp/docker-mailserver-test \
+		-e DISABLE_AMAVIS=1 \
+		-h mail.my-domain.com -t $(NAME)
 	# Wait for containers to fully start
 	sleep 20
 
@@ -77,4 +83,4 @@ tests:
 
 clean:
 	# Remove running test containers
-	docker rm -f mail mail_pop3 mail_smtponly mail_fail2ban fail-auth-mailer
+	docker rm -f mail mail_pop3 mail_smtponly mail_fail2ban fail-auth-mailer mail_disabled_amavis

target/start-mailserver.sh

@@ -328,7 +328,9 @@ fi
 # Start services related to SMTP
 /etc/init.d/spamassassin start
 /etc/init.d/clamav-daemon start
-/etc/init.d/amavis start
+if ! [ "$DISABLE_AMAVIS" = 1 ]; then
+  /etc/init.d/amavis start
+fi
 /etc/init.d/opendkim start
 /etc/init.d/opendmarc start
 /etc/init.d/postfix start

test/tests.bats

@@ -37,6 +37,11 @@
   [ "$status" -eq 0 ]
 }
 
+@test "checking process: amavis (amavis disabled by DISABLE_AMAVIS)" {
+  run docker exec mail_disabled_amavis /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/sbin/amavisd-new'"
+  [ "$status" -eq 1 ]
+}
+
 #
 # imap
 #