Few fixes.

Ubuntu installation (fix #4)
Generate map files when all shortcut is used (see #8)
Fix freshclam execution on Ubuntu

modoboa_installer/scripts/clamav.py

@@ -20,4 +20,10 @@ class Clamav(base.Installer):
         system.add_user_to_group(
             user, self.config.get("amavis", "user")
         )
-        utils.exec_cmd("freshclam", sudo_user=user)
+        if utils.dist_name == "ubuntu":
+            # Stop freshclam daemon to allow manual download
+            utils.exec_cmd("service clamav-freshclam stop")
+            utils.exec_cmd("freshclam", sudo_user=user)
+            utils.exec_cmd("service clamav-freshclam start")
+        else:
+            utils.exec_cmd("freshclam", sudo_user=user)

modoboa_installer/scripts/dovecot.py

@@ -33,6 +33,13 @@ class Dovecot(base.Installer):
         """Additional packages."""
         return self.packages + ["dovecot-{}".format(self.db_driver)]
 
+    def install_packages(self):
+        """Preconfigure Dovecot if needed."""
+        if utils.dist_name() == "ubuntu":
+            utils.preconfigure_package(
+                "dovecot-core", "create-ssl-cert", "boolean", "false")
+        super(Dovecot, self).install_packages()
+
     def get_template_context(self):
         """Additional variables."""
         context = super(Dovecot, self).get_template_context()

modoboa_installer/scripts/postfix.py

@@ -21,8 +21,8 @@ class Postfix(base.Installer):
 
     def install_packages(self):
         """Preconfigure postfix package installation."""
-        cfg = "postfix postfix/main_mailer_type select No configuration"
-        utils.exec_cmd("echo '{}' | debconf-set-selections".format(cfg))
+        utils.preconfigure_package(
+            "postfix", "main_mailer_type", "select", "No configuration")
         super(Postfix, self).install_packages()
 
     def get_template_context(self):
@@ -51,9 +51,12 @@ class Postfix(base.Installer):
         extensions = self.config.get("modoboa", "extensions")
         exts_with_maps = ["modoboa-admin", "modoboa-admin-relaydomains",
                           "modoboa-postfix-autoreply"]
-        extensions = [ext for ext in exts_with_maps if ext in extensions]
-        if not extensions:
-            return
+        if extensions == "all":
+            extensions = exts_with_maps
+        else:
+            extensions = [ext for ext in exts_with_maps if ext in extensions]
+            if not extensions:
+                return
         cmd = (
             "{} {} postfix_maps --dbtype {} --extensions {} --dburl {} {}"
             .format(python_path, script_path, self.dbengine,