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Use an explicit SCHEMA_VERSION instead of BuildConfig.VERSION_CODE (#3324) 

* Use an explicit SCHEMA_VERSION instead of BuildConfig.VERSION_CODE

Every nightly release has a new BuildConfig.VERSION_CODE, so the previous
code would not do the right thing.

Require the schema version to be explicitly set. While I'm here, provide
a clear set of guidelines as to what has to happen when the schema changes.

* Improve documentation links
This commit is contained in:
Nik Clayton 2023-02-25 21:22:49 +01:00 committed by GitHub
parent 4ab305f3dc
commit fda8c80949
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2 changed files with 36 additions and 4 deletions
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9
app/src/main/java/com/keylesspalace/tusky/TuskyApplication.kt
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@ -23,6 +23,7 @@ import autodispose2.AutoDisposePlugins
import com.keylesspalace.tusky.components.notifications.NotificationWorkerFactory
import com.keylesspalace.tusky.di.AppInjector
import com.keylesspalace.tusky.settings.PrefKeys
import com.keylesspalace.tusky.settings.SCHEMA_VERSION
import com.keylesspalace.tusky.util.APP_THEME_DEFAULT
import com.keylesspalace.tusky.util.LocaleManager
import com.keylesspalace.tusky.util.setAppNightMode
@ -69,10 +70,10 @@ class TuskyApplication : Application(), HasAndroidInjector {
AppInjector.init(this)
// Migrate shared preference keys and defaults from version to version. The last
// version that did not have a SCHEMA_VERSION was 97, so that's the default.
val oldVersion = sharedPreferences.getInt(PrefKeys.SCHEMA_VERSION, 97)
if (oldVersion != BuildConfig.VERSION_CODE) {
upgradeSharedPreferences(oldVersion, BuildConfig.VERSION_CODE)
// version that did not have a SCHEMA_VERSION was 100, so that's the default.
val oldVersion = sharedPreferences.getInt(PrefKeys.SCHEMA_VERSION, 100)
if (oldVersion != SCHEMA_VERSION) {
upgradeSharedPreferences(oldVersion, SCHEMA_VERSION)
}
// In this case, we want to have the emoji preferences merged with the other ones

31
app/src/main/java/com/keylesspalace/tusky/settings/SettingsConstants.kt
View File

@ -12,6 +12,37 @@ enum class AppTheme(val value: String) {
}
}
/**
* Current preferences schema version. Format is 4-digit year + 2 digit month (zero padded) + 2
* digit day (zero padded) + 2 digit counter (zero padded).
*
* If you make an incompatible change to the preferences schema you must:
*
* - Update this value
* - Update the code in
* [TuskyApplication.upgradeSharedPreferences][com.keylesspalace.tusky.TuskyApplication.upgradeSharedPreferences]
* to migrate from the old schema version to the new schema version.
*
* An incompatible change is:
*
* - Deleting a preference. The migration should delete the old preference.
* - Changing a preference's default value (e.g., from true to false, or from one enum value to
* another). The migration should check to see if the user had set an explicit value for
* that preference ([SharedPreferences.contains][android.content.SharedPreferences.contains]);
* if they hadn't then the migration should set the *old* default value as the preference's
* value, so the app behaviour does not unexpectedly change.
* - Changing a preference's type (e.g,. from a boolean to an enum). If you do this you may want
* to give the preference a different name, but you still need to migrate the user's previous
* preference value to the new preference.
* - Renaming a preference key. The migration should copy the user's previous value for the
* preference under the old key to the value for the new, and delete the old preference.
*
* A compatible change is:
*
* - Adding a new preference that does not change the interpretation of an existing preference
*/
const val SCHEMA_VERSION = 2023021501
object PrefKeys {
// Note: not all of these keys are actually used as SharedPreferences keys but we must give
// each preference a key for it to work.