Fail gracefully if the output directory does not already exist

[ctgraham]

JIRA Ticket: N/A

Present a warning if the output directory does not exist when bagging object

I configured the module without also creating the "Output directory for serialized Bags", and was greeted with the following messages on a drush run:

mkdir(): No such file or directory bagit.php:611                                                         [warning]
mkdir(): Permission denied bagit.php:617                                                                 [warning]
touch(): Unable to create file /manifest-sha1.txt because Permission denied bagit_manifest.php:113       [warning]
file_put_contents(/bagit.txt): failed to open stream: Permission denied bagit_utils.php:252              [warning]
touch(): Unable to create file /tagmanifest-sha1.txt because Permission denied bagit_manifest.php:113    [warning]
touch(): Unable to create file /bag-info.txt because Permission denied bagit.php:656                     [warning]
mkdir(): Permission denied bagit.php:435                                                                 [warning]
copy(/data/foo.xml): failed to open stream: No such file or directory bagit.php:438                      [warning]
mkdir(): Permission denied bagit.php:435                                                                 [warning]
copy(/data/RELS-EXT.rdf): failed to open stream: No such file or directory bagit.php:438                 [warning]

What's new?

Adds a Drupal messaging and an Exception thrown if the output directory does not exist.

This prevents a slew of impossible operation attempts.

How should this be tested?

• Configure without a valid output directory
• Run a drush bagging operation

Additional Notes:

N/A

Interested parties

@Islandora/7-x-1-x-committers

[mjordan]

Thanks! I will review and test.