It is possible to specify before and after rules on config fragments
that conflict - A before B and B before A isnt possible to solve.
This used to just throw an error with no way to debug. Now if you
specify debug as a GET parameter and the site is not in live mode
youll get a basic dump of the remaining DAG graph
When specifying a specific before rule and a wildcard after rule (or
vice versa), the config system was filtering out any fragment
from the list of fragments that matched the wildcard if it matched
_any_ componenet of the specific rule, not all of them.
Fixed, and added handling of two semi wild-card rules, where a
rule with less wildcards wins over a rule with more.
See http://open.silverstripe.org/ticket/7765 for more
You should be able to specify multiple before and after rules in
a config fragment. This was intended to be a comma seperated string
but that wasnt being split properly
Now if you provide a comma seperated string it is split properly,
but you can also provide an array, which is actually cleaner
- Do not skip the cache if there are currently no environmental specific spec, just use the an empty variantKeySpec.
- When doing a regeneration of the config, clear the previous values from the array before regeneration.
