At the moment, quiz_statistics\task\recalculate gives no useful
information about what it is doing, which makes it hard to investigate
if the task fails. This commit makes it more usefully verbose.
Also, following this change, one instance of this task will not
run for more than one hour at a time.
As part of this commit, I have added a new helper mtrace_exception.
to consistently log exceptions in scheduled tasks. It is sad to
add a new function to moodlelib.php, but that seemed the logical place.
Looking at other tasks, this method is badly needed. Many are just
logging the ->getMessage() which is normaly insufficient for proper
debugging. However, swiching all existing tasks to use the new function
will need to wait for a future MDL.
The $CFG->enabledashboard setting has been added to Appearance >
Navigation, to let admins disable the "Dashboard" option from the
primary navigation.
This commit also changes the behaviour of get_home_page(), to take
into account this setting and adds a new method, get_default_home_page(),
to return the expected default home page (that wil be used when current
default page is not defined or valid).
For cache types which mean this information can be obtained without a
significant performance cost (i.e. just by calling strlen and not
having to serialize something that wasn't serialized already),
this change calculates the size of data read from or written to cache
in each request and includes it in the perfdebug table at bottom of
output (when that is turned on).
This supports the following cache types:
* File store
* Redis (only if caching is enabled)
Allows display_size to use a fixed unit for easy comparison of
multiple results, and fixed decimal places for the same reason.
Improves behaviour by using consistent decimal places and a
consistent space before the unit (the previous one only has a space
before 'bytes', not before 'KB').
Of existing uses, all the ones that displayed a 'maxbytes' type
configuration setting (which are likely to have an 'exact' size
and would be better shown as 512 KB rather than 512.0 KB) have been
changed to use 0 decimal places, to preserve previous behaviour.
All the uses which were showing an actual file or memory size have
been left as default (1 decimal place).
The `get_list_of_plugins()` function is used to fetch plugin-like files
or directories from a specified directory. A number of standard
exclusions are included but this list is not the same as the list in
`core_component`.
The list has been updated to include the `amd` directory, which is
regularly used in both components, and plugins.
Paul Holden