Renovate

We're using the Renovate bot, based on a common Pocket configuration: https://github.com/Pocket/renovate-config

Configuration customizations

Because JSON doesn't support comments, this readme walks through any customization we apply on top of Pocket configuration.

Disable Kotlin and KSP updates

{
  "packageRules": [
    {
      "matchSourceUrls": [
        "https://github.com/JetBrains/kotlin",
        "https://github.com/google/ksp"
      ],
      "enabled": false
    }
  ]
}

This rule disables updating Kotlin and Kotlin Symbol Processing.

The reason is we're using Jetpack Compose and each Compose compiler version requires a specific Kotlin version. See: https://developer.android.com/jetpack/androidx/releases/compose-kotlin

KSP versions are also tied to Kotlin versions. In this case it is more obvious as KSP version includes Kotlin version it targets.

This means we can only update Kotlin by updating Compose compiler at the same time. This usually means we can't use a new Kotlin version as soon as it drops. We have to wait for a Compose compiler update. Looks like KSP releases more often than Kotlin. But we decided that it's not critical for us to be on the latest KSP version all the time, so to simplify we will only bump KSP whenever we bump Kotlin.

To update Kotlin/Compose compiler:

• Wait for renovate to detect a new Compose compiler version.
• Let renovate open a PR with Compose compiler update.
• Manually push a commit to renovate's branch to also update Kotlin to a matching version.
• Then the branch should compile.
• Manually push a commit to also update KSP to the latest version matching the new Kotlin version.
• Review, test and verify as normal and then merge.

Here's an example PR upgrading Compose compiler to 1.5.0 and Kotlin to 1.9.0: https://github.com/Pocket/MozillaSocialAndroid/pull/59