Show different update notification for F-Droid installations

app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateChecker.kt

@@ -8,6 +8,7 @@ import eu.kanade.tachiyomi.network.NetworkHelper
 import eu.kanade.tachiyomi.network.await
 import eu.kanade.tachiyomi.network.parseAs
 import eu.kanade.tachiyomi.util.lang.withIOContext
+import eu.kanade.tachiyomi.util.system.getInstallerPackageName
 import uy.kohesive.injekt.injectLazy
 import java.util.Date
 import java.util.concurrent.TimeUnit
@@ -33,14 +34,19 @@ class AppUpdateChecker {
 
                     // Check if latest version is different from current version
                     if (isNewVersion(it.version)) {
-                        AppUpdateResult.NewUpdate(it)
+                        if (context.getInstallerPackageName() == "org.fdroid.fdroid") {
+                            AppUpdateResult.NewUpdateFdroidInstallation
+                        } else {
+                            AppUpdateResult.NewUpdate(it)
+                        }
                     } else {
                         AppUpdateResult.NoNewUpdate
                     }
                 }
 
-            if (result is AppUpdateResult.NewUpdate) {
-                AppUpdateNotifier(context).promptUpdate(result.release)
+            when (result) {
+                is AppUpdateResult.NewUpdate -> AppUpdateNotifier(context).promptUpdate(result.release)
+                is AppUpdateResult.NewUpdateFdroidInstallation -> AppUpdateNotifier(context).promptFdroidUpdate()
             }
 
             result

app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateNotifier.kt

@@ -58,6 +58,22 @@ internal class AppUpdateNotifier(private val context: Context) {
         notificationBuilder.show()
     }
 
+    /**
+     * Some people are still installing the app from F-Droid, so we avoid prompting GitHub-based
+     * updates.
+     *
+     * We can prompt them to migrate to the GitHub version though.
+     */
+    fun promptFdroidUpdate() {
+        with(notificationBuilder) {
+            setContentTitle(context.getString(R.string.update_check_notification_update_available))
+            setContentText(context.getString(R.string.update_check_fdroid_migration_info))
+            setSmallIcon(R.drawable.ic_tachi)
+            setContentIntent(NotificationHandler.openUrl(context, "https://tachiyomi.org/help/guides/troubleshooting/#unable-to-install-the-app-or-extensions"))
+        }
+        notificationBuilder.show()
+    }
+
     /**
      * Call when apk download starts.
      *

app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateResult.kt

@@ -2,5 +2,6 @@ package eu.kanade.tachiyomi.data.updater
 
 sealed class AppUpdateResult {
     class NewUpdate(val release: GithubRelease) : AppUpdateResult()
+    object NewUpdateFdroidInstallation : AppUpdateResult()
     object NoNewUpdate : AppUpdateResult()
 }

app/src/main/java/eu/kanade/tachiyomi/util/system/ContextExtensions.kt

@@ -382,6 +382,19 @@ fun Context.isPackageInstalled(packageName: String): Boolean {
     }
 }
 
+fun Context.getInstallerPackageName(): String? {
+    return try {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            packageManager.getInstallSourceInfo(packageName).installingPackageName
+        } else {
+            @Suppress("DEPRECATION")
+            packageManager.getInstallerPackageName(packageName)
+        }
+    } catch (e: Exception) {
+        null
+    }
+}
+
 fun Context.getApplicationIcon(pkgName: String): Drawable? {
     return try {
         packageManager.getApplicationIcon(pkgName)

app/src/main/res/values/strings.xml

@@ -765,6 +765,7 @@
     <string name="update_check_notification_download_complete">Download complete</string>
     <string name="update_check_notification_download_error">Download error</string>
     <string name="update_check_notification_update_available">New version available!</string>
+    <string name="update_check_fdroid_migration_info">A new version is available from the official releases. Tap to learn how to migrate from unofficial F-Droid releases.</string>
 
     <!--Extension Updates Notifications-->
     <plurals name="update_check_notification_ext_updates">