Raise the build number on every upload

How to do it

Google Play refuses a versionCode it has seen before, and the largest it accepts is 2100000000. Apple reads CFBundleVersion as the build number and CFBundleShortVersionString as the version people see. Use the CI run number, or a number made from the date, so two branches never pick the same one. Stamp the commit into the build as stamp every build with its version says. Then a crash report leads back to the code.

Examples

Kotlin example

android {
    defaultConfig {
        versionCode = System.getenv("CI_RUN_NUMBER")?.toInt() ?: 1
        versionName = "3.4.0"
    }
}

Plain text example

lane :bump do
  increment_build_number(build_number: ENV.fetch("CI_RUN_NUMBER"))
  increment_version_number(version_number: "3.4.0")
end

How to check

CI fails when the new build number is not higher than the last one in each store. The about screen shows both the version and the build number.

Sources

• Apple, CFBundleVersion
• Android, Version your app

Related rules

• Stamp every build with its version in Engineering
• Upload symbols for every build in Mobile apps