Composer replace islandora/islandora.

[rosiel]

GitHub Issue: Islandora/documentation#2270

• Other Relevant Links (Google Groups discussion, related pull requests,
  Release pull requests, etc.)

• Prefer drupal namespace in Composer. #1020

What does this Pull Request do?

Tells composer that this repo contains the code of islandora/islandora. This matters when we access it through Drupal.org and the drupal/ namespace.

What's new?

Composer.json now includes a "require" section, patterned after @adam-vessey 's great suggestion in the above-linked PR.

• Does this change add any new dependencies? no
• Does this change require any other modifications to be made to the repository
  (i.e. Regeneration activity, etc.)? no
• Could this change impact execution of existing code? yes, ish, but in the desired way.

How should this be tested?

This allows the project to be used when a dependency depends on islandora/islandora. Due to how Composer pulls this info from repos, direct testing is difficult.

To test, you would need to change the repo name from islandora/islandora to drupal/islandora. But we've decided we're not doing that yet!

However I have tested, and found that this directive allows islandora_hierarchical_access (a module that depends on islandora) to be installed with only drupal/islandora:

Rosies-MacBook-Pro:islandora-starter-site [git:pathauto+] rlefaive % composer why islandora/islandora
discoverygarden/islandora_hierarchical_access v1.3.0                                requires islandora/islandora (^2)           
drupal/islandora                              dev-composer-shim-islandora-namespace replaces islandora/islandora (self.version) 

Documentation Status

• Does this change existing behaviour that's currently documented? no
• Does this change require new pages or sections of documentation? no
• Who does this need to be documented for? email coming soon.
• Associated documentation pull request(s): ___ or documentation issue ___

Additional Notes:

Any additional information that you think would be helpful when reviewing this
PR.

Interested parties

Tag (@ mention) interested parties or, if unsure, @Islandora/committers

[rosiel]

This branch is breaking packagist, as a project cannot replace itself.