Add debug logging

[kiftio]

What changes are you making?

Allowing emission of debug logs via

ShopifyCheckoutSheetKit.configure {
        it.logLevel = LogLevel.DEBUG
}

I've opted to enabling debug logs only via explicit configuration to prevent altering logging for any existing clients who don't require it (via defaulting to LogLevel.WARN).

---

Video of some logs being emitted:

debug-logs.mp4

How to test

• Configure as above
• Run the app
• Open checkout
• Check logcat for debug output.

Then repeat, with LogLevel.WARN, LogLevel.ERROR, and omitting it.logLevel to check the default, and ensure the logs no longer appear.

Before you merge

Important

• I've added tests to support my implementation
• I have read and agree with the Contribution Guidelines.
• I have read and agree with the Code of Conduct.
• I've updated the README.

---

Checklist for releasing a new version

• I have bumped the version number in the build.gradle file
• I have added a Changelog entry.
• I have updated the versions in the README.md for both Gradle and Maven.

Tip

See the Contributing documentation for instructions on how to publish a new version of the library.

[markmur]

@kiftio want to align this with the swift implementation?

https://github.com/Shopify/checkout-sheet-kit-swift/blob/3ef22767ba68f279b314fffc93ee96930aaa0d43/Sources/ShopifyCheckoutSheetKit/Configuration.swift#L60-L62

/// Levels: all, debug, error, none
/// Default: .error - which will emit "error" and "fault" logs
public var logLevel: LogLevel = .error

[kiftio]

@kiftio want to align this with the swift implementation?

https://github.com/Shopify/checkout-sheet-kit-swift/blob/3ef22767ba68f279b314fffc93ee96930aaa0d43/Sources/ShopifyCheckoutSheetKit/Configuration.swift#L60-L62

/// Levels: all, debug, error, none
/// Default: .error - which will emit "error" and "fault" logs
public var logLevel: LogLevel = .error

I've updated it to something similar

[markmur]

🚢