Version files

[elizoller]

GitHub Issue: (Islandora/documentation#740)

What does this Pull Request do?

Connects the replacement of a Fedora flysystem file in Drupal to the versioning of an existing resource in Fedora.

What's new?

• requires a third party module now - file_replace
• extensions to the flysystem adapter

How should this be tested?

• Create an islandora object with an attached media and file (being stored in fedora)
• install the file_replace module (composer require drupal/file_replace and drush pm-enable file_replace (or use this PR: add file_replace module to provide an interface for replacing files Islandora-Devops/islandora-playbook#184)
• pull down this PR
• go to the file replace page for your file like /admin/content/files/replace/{{fid}}
• replace the file
• get your fedora url for that file - ie. http://localhost:8080/fcrepo/rest/2020-08/Barton_CHANS_2010.pdf
• hit the fcr:versions endpoint for - you should see a new version (should have an ldp:contains at the end that ends with the date stamp for when you made the version) ie. curl -v http://localhost:8080/fcrepo/rest/2020-08/Barton_CHANS_2010.pdf/fcr:versions

Additional Notes:

I'll need to package up a PR to islandora-playbook to add this module if people are ok with it

Interested parties

@Islandora/8-x-committers

[mjordan]

Works as expected. When I go to the Fedora URL with fcr:versions appended, I see:

Then when I GET the URL behind that link (using wget for example) I do indeed get the previous version of my file. 👍

One thing that is somewhat confusing in the Fedora HTML UI is that if you click on the link, you get redirected to the HTML page for the binary resource, where, if you click on "Download Content", you get the latest version, not the one you expect. But, that should probably be expected since the Fedora HTML UI says under "Versioning", "Versioning of binary resources is not currently available through the HTML UI."

@elizoller if you remove the debugging code, I can merge. Nice work, binary versioning in Fedora FTW!

[mjordan]

But also, Travis says Drupal\Tests\islandora\Kernel\JwtEventSubscriberTest is failing.

[whikloj]

To go along with the ones @mjordan found, I found 2 more. Some of them could remain at the debug level, but should have the wording cleaned up to be more useful.

[elizoller]

@mjordan @whikloj i reduced the logging. i'm not sure how to tell travis to include the new dependency - or if the islandora-playbook PR needs to be merged first for that

[elizoller]

i believe Islandora-Devops/islandora-playbook#184 would need to be merged in order for travis to be happy about the new dependency.

[mjordan]

@elizoller I'll try to get to Islandora-Devops/islandora-playbook#184 this evening, then try a build.

[elizoller]

@mjordan travis is happy!

[elizoller]

@mjordan @whikloj better?

[whikloj]

I'm good with how the code looks, but I haven't tested this yet. So I'll see if I have the cycles available unless @mjordan does.

[mjordan]

Retesting now

[mjordan]

I'm happy with this. Watchdog now looks like:

[mjordan]

Works as expected.