Setup mailman3 server

We want to migrate to mailman3 as mailman2 is basically unmaintained and requires Python 2 which is EOL.

Because the mailman and mailman3 packages conflict and we don't want to perform a big bang migration, mailman3 must be deployed on a separate server. mailman-web (mailman3's web interface) hasn't been packaged yet, so for now we are using my homebrewed PKGBUILD.

[1] https://gist.github.com/klausenbusk/5982063f95c503754a51ed2fefb8915e

Ref #59 (closed)

---

Migrated lists:

• arch-announce
• arch-devops-private
• arch-events
• arch-wiki-admins

roles/mailman3/tasks/main.yml

 ---
-- name: install mailman3, mailman3-hyperkitty, python-psycopg2, mailman-web and uwsgi-plugin-python
-  pacman: name=mailman3,mailman3-hyperkitty,python-psycopg2,mailman-web,uwsgi-plugin-python state=present
+- name: install mailman3, mailman3-hyperkitty, python-xapian-haystack, python-psycopg2, mailman-web and uwsgi-plugin-python
+  pacman: name=mailman3,mailman3-hyperkitty,python-xapian-haystack,python-psycopg2,mailman-web,uwsgi-plugin-python state=present
 
 - name: install {mailman,mailman-web} configuration
   template: src={{ item.src }} dest={{ item.dest }} owner=root group={{ item.group }} mode=0640
@@ -13,6 +13,10 @@
     - reload mailman
     - restart mailman-web
 
+# TODO: bug in mailman-web?
+- name: create hyperkitty index directory
+  file: path=/var/lib/mailman-web/data/fulltext_index state=directory owner=mailman-web group=mailman-web mode=0755
+
 - name: install mailman postfix.cfg configuration
   copy: src=postfix.cfg dest=/etc/postfix.cfg owner=root group=root mode=0644
   notify: reload mailman