[spaceship] Add retrieve-create of iap shared secret to Spaceship::Tunes

[piechart]

Checklist

• I've run bundle exec rspec from the root directory to see all new and existing tests pass
• I've followed the fastlane code style and run bundle exec rubocop -a to ensure the code style is valid
• I've read the Contribution Guidelines
• I've updated the documentation if necessary.

Motivation and Context

I was working on iOS project in a remote team. Once someone was implementing in-app purchases functionality and regenerated shared secret key. Unluckily, at the same time I was testing other iaps in the app. Having fastlane as a helping tool which lanes prevent a lot of other cases of such scenarios in the project, I thought being able to retrieve actual shared secret via Spaceship and set in the project somehow would be a useful feature.

Description

Retrieve currently existing shared secret (or create if does not exist)

Spaceship::Tunes.login
app = Spaceship::Tunes::Application.find('bundle_identifier')
secret = app.in_app_purchases.get_shared_secret(create: true)

Generate (or regenerate if exists) new app-specific shared secret

Spaceship::Tunes.login
app = Spaceship::Tunes::Application.find('bundle_identifier')
secret = app.in_app_purchases.generate_shared_secret

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[piechart]

@googlebot I signed it!

[googlebot]

CLAs look good, thanks!

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[joshdholtz]

I had no idea this was a thing 🙃 Thanks for the PR for this! I requested one little change to split the tunes client method into two methods. Would you also be able to add some tests for this as well?

[joshdholtz]

Can we actually split this into two methods? One for the :get and one for the :post. I’d just like this to follow the rest of the conventions in this class and keep the :get and :post encapsulated into this file 😇

[piechart]

Thanks for review, totally agree. Have done this! 👍

[joshdholtz]

@max-ott Can you take a look at these changes too? 😊

[joshdholtz]

Looks great to me! Thanks for making those changes ❤️ I’ll wait for @max-ott’s review before merging 😊

[max-ott]

Works like a charm! Thanks for the addition.

[max-ott]

Tested and everything is working as intended!

[piechart]

@max-ott thank you for review!
@joshdholtz seems like it is ready to be merged now 😃

[fastlane-bot]

Hey @piechart 👋

Thank you for your contribution to fastlane and congrats on getting this pull request merged 🎉
The code change now lives in the master branch, however it wasn't released to RubyGems yet.
We usually ship about once a week, and your PR will be included in the next one.

Please let us know if this change requires an immediate release by adding a comment here 👍
We'll notify you once we shipped a new release with your changes 🚀

[fastlane-bot]

Congratulations! 🎉 This was released as part of fastlane 2.147.0 🚀