The new setting will allow to host the temporary backup files
into a specific target directory. Defaults to '$CFG->tempdir/backup'.
Calling make_backup_temp_directory() checks that the required sub-directory
will be properly created under the new target directory.
This commits cleans some code (settings and dependencies)
and one file included previous by error.
Also it disables all the IMS-CC export feature by default, being
possible to enable it under demand by setting (@ config.php):
$CFG->enablebackupconverters = true;
Added write_xml() helper that writes the given tree-ish structure into
the current xml writer. Improved get_contextid() so that it can use
indices for searching data. Added set_stash() and get_stash() helper
methods.
These are David's changes of Mark's code that replace the
plan/tasks/steps infrastructure with a bit simpler one. The changes will
be described in the next commit that will actually finish the
conversion.
TODO: refactor backup/converter/moodle1/stepslib.php into conversion
handlers.
* Several base_converter methods made protected when there was no obvious
reason why they should be public (subject of eventual change still).
* The conversion chain now constructed in advance before any converter
class is instantiated, using Dijkstra's algorithm.
Matteo Scaramuccia