Ghostscript Update

[lutaylor]

JIRA Ticket:
https://jira.duraspace.org/browse/ISLANDORA-2035

• Other Relevant Links (Google Groups discussion, related pull requests, Release pull requests, etc.)
  Islandora/islandora_paged_content@723004b
  ISLANDORA-2053: Update travis.yml to force PHP 5.3.3 to run under Ubuntu Precise Islandora/islandora_paged_content#137
  Issue link Included GhostScript version (9.10) fails to extract PDF pages on RGB format islandora_vagrant#127

What does this Pull Request do?

Updates Ghostscript to latest version 9.23 which should allow for compression.

What's new?

Updated Ghostscript version to the latest.

How should this be tested?

vagrant up
gs -v
Should show Ghostscript version 9.23.
If it shows any other version or the gs -v command fails to run then the test should be considered failed.

The box should be re-exported to ensure it still works with latest Islandora.

As per Islandora-Labs/islandora_vagrant#127

Ingest 2 newspapers (ideally multiple pages)
Using a PDF
1st newspaper PDF should use the PAGE IMAGE SETTINGS at the upload page of 48-bit RGB, 150 DPI or 300 DPI with Extract text from the PDF
2nd newspaper PDF should use the PAGE IMAGE SETTINGS at the upload page of 32-bit CMYK, 300 DPI with Extract text from the PDF
Check if derivatives were properly generated

Additional Notes:

Completely optional PR we might want to think about sticking with 9.10 just for legacy reasons since it is still being maintained for security patches by Ubuntu.

Either way, we should be able to close out Issue link Islandora-Labs/islandora_vagrant#127

Interested parties

@DonRichards @Islandora-Labs/committers

[DonRichards]

@lutaylor Under the "How should this be tested" section is should say what would fail if this Ghostscript change fails?

[lutaylor]

@DonRichards
I added some more to the test case.

[DonRichards]

OK, thanks. I'll take a look.

[DonRichards]

@lutaylor 2 questions. How do you suggest I test if upgrading Ghostscript isn't breaking anything (image ingest, book, etc) and would you mind correcting the code travis is complaining about?

[DonRichards]

Sorry, I know it sounds a little dumbed down asking what should be tested but I have found it immensely helpful in the past. So small changes like this might have massive effects on seemingly unrelated functions.

[lutaylor]

Your test case mentioned here should do perfectly Islandora-Labs/islandora_vagrant#127

Ingest 2 newspapers (ideally multiple pages)
Using a PDF
1st newspaper PDF should use the PAGE IMAGE SETTINGS at the upload page of 48-bit RGB, 150 DPI or 300 DPI with Extract text from the PDF
2nd newspaper PDF should use the PAGE IMAGE SETTINGS at the upload page of 32-bit CMYK, 300 DPI with Extract text from the PDF
Check if derivatives were properly generated

Ok to use this?

[lutaylor]

I fixed the travis check.

[DonRichards]

Nice work thanks!

[lutaylor]

@DonRichards
I see you approved the changes did you want to merge?

[DonRichards]

Apologies. Meant to merge it yesterday.