add post

Author: sonjh1217

_posts/2025-11-12-fastlane.md

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+---
+title:  "Added a pull request to fastlane to support new screen sizes"
+
+categories:
+  - fastlane
+tags:
+  - Screensize
+  - fastlane
+---
+
+I have an app that hadn’t been updated for five years, but in September I received a kind review from a user, which asks for deleting feature of search results.
+
+<img src="./assets/img/post/review.png" alt="review" width="500">
+
+Appreciating the review, I decided to make a small update and release it.
+However, when I tried to upload screenshots through fastlane, it failed with errors.
+~~~
+[18:11:51]: 🚫 Error: ./fastlane/screenshots/en-US/iPad Pro 13-inch (M4)-1-FillingPAOFieldsOfProductViewController.png - Invalid screen size (Actual size is 2064x2752. See the specifications to fix https://help.apple.com/app-store-connect/#/devd274dd925)
+~~~
+{: .language-bash}
+But according to [Apple’s documentation](https://developer.apple.com/help/app-store-connect/reference/app-information/screenshot-specifications), the sizes in errors were valid.
+I found that fastlane hadn’t been updated with new devices for about four years, and there were already a few open pull requests related to this. Referring to those, I wrote some code myself and tried again.
+~~~
+[22:38:33]: fastlane finished with errors
+bundler: failed to load command: fastlane (/Users/jihyunson/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/bin/fastlane)
+Spaceship::AppStoreScreenshotError: [!] en-US
+~~~
+{: .language-bash}
+Then even stranger errors appeared.
+The cause turned out to be that the [App Store Connect API](https://developer.apple.com/documentation/appstoreconnectapi/screenshotdisplaytype) still does not support 6.9’’ and 6.3’’ device sizes. 
+
+I was shocked for two reasons:
+1. How could App Store Connect API not support these devices for years?
+2. How could people submit pull requests without actually running the code and verifying that previews upload correctly?
+
+For the first one, I realized that not many developers automate screenshot uploads, and using 6.5’’ screenshots works fine anyway. I submitted feedback to Apple.
+For second, I’m still not sure—maybe I’m missing something.
+
+Anyway, adding new sizes to the existing device types worked fine. So I submitted [a pull request](https://github.com/fastlane/fastlane/pull/29742)
+
+Through this, I learned that fastlane isn’t really a black box. A Gemfile is just like a Podfile or SPM—it’s all code! You can even point it to your local repository like this:
+~~~
+gem "fastlane", path: '/Users/[...]/Documents/fastlane'
+~~~
+{: .language-ruby}
+
+Opening black boxes is always fun ❤️‍🔥