Allow excluding realms from queries by default

[anonymous]

I would like to have a config-option that allows excluding, e.g., the ticket realm from tag-queries, such that only if I explicitly include it in the query it will be included.

The patch in #9059 implements this feature using a exclude_realms list-option.

[hasienda]

Understand, but your proposed solution is flawed, because it does rely on argument counts, that some plugins are known to mess around with. I.e. my local FlexibleWikiPlugin install adds a 'node' argument everywhere, even outside the wiki domain/realm.

May it be, that this is a bug, but I'm reluctant to let it hit TagsPlugin for new stuff. I'm about to alter the implementation to be little more robust against this type of disturbance.

[hasienda]

Ok, found another way, that doesn't depend on the number of arguments in the current request. :-)

[hasienda]

(In [10661]) TagsPlugin: Provide configurable default list of realms to exclude from tags query, refs #9059 and #9063.

Administrators may configure tag realms to require explicite selection for
every new tags query by adding them to a new ListOption 'exclude_realms'
or 'listtagged_exclude_realms' for ListTagged macro calls respectively.
The original suggestion has been contributed by Itamar Ostricher, thank you.

These changes include an additional workaround to get the expected result,
even if you deselect all available realms. Otherwise this would have
neutralized your setting for these options.

[hasienda]

(In [12391]) TagsPlugin: Make realm configuration for ListTagged more effective, refs #7857 and #9063.

Settings for 'listtagged_exclude_realms' had no effect without a query.
Itamar Ostricher discovered this issue in the initial implementation of the
feature and suggested this change. Thanks for taking care.

Additionally the broken 'test_empty_content' test in
tractags.tests.macros.ListTaggedMacroTestCase is fixed, and a regression test
for the pending 'empty query' issue (#7857) has been introduced as well.