clammit: download the database once when the slappart is started the first time

The database will be refreshed by cron daily, but we need a way to initialize
the first download without waiting for the first cron to kick in.

software/clammit/buildout.hash.cfg

@@ -15,7 +15,7 @@
 
 [instance.cfg.in]
 filename = instance.cfg.in
-md5sum = a327c7aebd30df6c59c01078cc0efe3a
+md5sum = 83addd63b24d84fad15356276a5db484
 
 [clamd.conf.in]
 filename = clamd.conf.in

software/clammit/instance.cfg.in

@@ -115,9 +115,19 @@ context =
   section clamconfig clam-config
   key clamd_config_file clamd.conf:output
 
+[freshclam-updater]
+recipe = slapos.recipe.template
+output = ${directory:bin}/freshclam
+inline =
+  #!/bin/sh
+  if [ ! -f "${directory:var.clamdb}/freshclam.dat" ]; then
+    {{ clamav.location }}/bin/freshclam --config-file ${freshclam.conf:output}
+  fi
+mode = 700
+
 [freshclam]
 recipe = slapos.cookbook:wrapper
-command-line = {{ clamav.location }}/bin/freshclam --config-file ${freshclam.conf:output}
+command-line = ${freshclam-updater:output}
 wrapper-path = ${directory:etc.run}/${:_buildout_section_name_}
 
 [freshclam-database-refresh-time]

software/clammit/test/test.py

@@ -83,6 +83,16 @@ class ClammitTestCase(SlapOSInstanceTestCase):
     )
     self.assertEqual(r.status_code, 418)
 
+  def test_virus_database_is_downloaded_on_instanciation(self):
+    database_path = os.path.join(
+      self.computer_partition_root_path,
+      "var", "clamdb", "freshclam.dat"
+    )
+    try:
+      os.stat(database_path)
+    except OSError:
+      raise AssertionError("No database found at %s", database_path)
+
   def test_renew_certificate(self):
     def _getpeercert():
       # XXX low level way to get the server certificate