Configure dovecot's managesieve plugin when the environment variable

ENABLE_MANAGE_SIEVE has been set.

Adapted README and updated tests.

The functionality has successfully been tested using the Sieve
Thunderbird plugin.

Dockerfile

@@ -5,7 +5,7 @@ MAINTAINER Thomas VIAL
 RUN DEBIAN_FRONTEND=noninteractive apt-get update -q --fix-missing && \
 	apt-get -y upgrade && \
 	apt-get -y install --no-install-recommends \
-	postfix dovecot-core dovecot-imapd dovecot-pop3d dovecot-sieve gamin amavisd-new spamassassin razor pyzor \
+	postfix dovecot-core dovecot-imapd dovecot-pop3d dovecot-sieve dovecot-managesieved gamin amavisd-new spamassassin razor pyzor \
 	clamav clamav-daemon libnet-dns-perl libmail-spf-perl bzip2 file gzip p7zip unzip arj rsyslog \
     opendkim opendkim-tools opendmarc curl fail2ban ed iptables && \
 	curl -sk http://neuro.debian.net/lists/trusty.de-m.libre > /etc/apt/sources.list.d/neurodebian.sources.list && \
@@ -74,6 +74,6 @@ RUN curl -s https://letsencrypt.org/certs/lets-encrypt-x1-cross-signed.pem > /et
 ADD target/bin/generate-ssl-certificate target/bin/generate-dkim-config target/start-mailserver.sh /usr/local/bin/
 RUN chmod +x /usr/local/bin/*
 
-EXPOSE 25 587 143 993 110 995
+EXPOSE 25 587 143 993 110 995 4190
 
 CMD /usr/local/bin/start-mailserver.sh

Makefile

@@ -23,6 +23,7 @@ run:
 		-e SA_TAG2=2.0 \
 		-e SA_KILL=3.0 \
 		-e SASL_PASSWD=testing \
+		-e ENABLE_MANAGE_SIEVE=1 \
 		-h mail.my-domain.com -t $(NAME)
 	sleep 20
 	docker run -d --name mail_pop3 \

README.md

@@ -113,6 +113,11 @@ If you enable Fail2Ban, don't forget to add the following lines to your `docker-
 
 Otherwise, `iptables` won't be able to ban IPs.
 
+##### ENABLE_MANAGE_SIEVE
+
+  - **empty** => Managesieve service disabled
+  - 1 => Enables Managesieve on port 4190
+
 ##### SA_TAG
 
   - **2.0** => add spam info headers if at, or above that level

target/start-mailserver.sh

@@ -23,6 +23,7 @@ if [ -f /tmp/docker-mailserver/postfix-accounts.cf ]; then
   cp -a /usr/share/dovecot/protocols.d /etc/dovecot/
   # Disable pop3 (it will be eventually enabled later in the script, if requested)
   mv /etc/dovecot/protocols.d/pop3d.protocol /etc/dovecot/protocols.d/pop3d.protocol.disab
+  mv /etc/dovecot/protocols.d/managesieved.protocol /etc/dovecot/protocols.d/managesieved.protocol.disab
   sed -i -e 's/#ssl = yes/ssl = yes/g' /etc/dovecot/conf.d/10-master.conf
   sed -i -e 's/#port = 993/port = 993/g' /etc/dovecot/conf.d/10-master.conf
   sed -i -e 's/#port = 995/port = 995/g' /etc/dovecot/conf.d/10-master.conf
@@ -234,6 +235,12 @@ echo "Starting daemons"
 cron
 /etc/init.d/rsyslog start
 
+# Enable Managesieve service by setting the symlink
+# to the configuration file Dovecot will actually find
+if [ "$ENABLE_MANAGE_SIEVE" = 1 ]; then
+  mv /etc/dovecot/protocols.d/managesieved.protocol.disab /etc/dovecot/protocols.d/managesieved.protocol
+fi
+
 if [ "$SMTP_ONLY" != 1 ]; then
   # Here we are starting sasl and imap, not pop3 because it's disabled by default
   echo " * Starting dovecot services"

test/tests.bats

@@ -419,3 +419,13 @@
   [ "$status" -eq 0 ]
   [ "$output" = 1 ]
 }
+
+@test "checking manage sieve: server is ready when ENABLE_MANAGE_SIEVE has been set" {
+  run docker exec mail /bin/bash -c "nc -z 0.0.0.0 4190"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking manage sieve: disabled per default" {
+  run docker exec mail_pop3 /bin/bash -c "nc -z 0.0.0.0 4190"
+  [ "$status" -ne 0 ]
+}