slaprunner: lightened part slapos-repo-config, with some security added for updates

software/slaprunner/instance-runner.cfg

@@ -543,9 +543,8 @@ location = $${directory:project}/slapos
 [slapos-repo-config]
 recipe = plone.recipe.command
 stop-on-error = true
-reference = $${slap-parameter:slapos-reference}
-location = $${slapos-repo:location}
-command = cd $${:location} && ${git:location}/bin/git checkout $${:reference} && echo "$${directory:etc}/.project" && SR=$${slap-parameter:slapos-software} && if [ -n "$SR" ] && [ ! -f "$${directory:etc}/.project" ]; then echo workspace/slapos/$${slap-parameter:slapos-software}/ > $${directory:etc}/.project; fi
+command = cd $${slapos-repo:location} && ${git:location}/bin/git checkout $${slap-parameter:slapos-reference} && SR=$${slap-parameter:slapos-software} && if [ -n "$SR" ] && [ ! -f "$${directory:etc}/.project" ]; then echo workspace/slapos/$${slap-parameter:slapos-software}/ > $${directory:etc}/.project; fi
+update-command = true
 
 [prepare-software]
 recipe = slapos.cookbook:wrapper