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android: be stricter about system backups #654

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android: be stricter about system backups #654

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2 changes: 2 additions & 0 deletions android/src/main/AndroidManifest.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,8 @@
<application
android:name=".App"
android:allowBackup="false"
android:fullBackupContent="@xml/backup_rules"
android:dataExtractionRules="@xml/data_extraction_rules"
android:banner="@drawable/tv_banner"
android:icon="@mipmap/ic_launcher"
android:label="Tailscale"
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9 changes: 9 additions & 0 deletions android/src/main/res/xml/backup_rules.xml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
<?kml version="1.0" encoding="utf-8"?>
<!-- data_extraction_rules but for devices below Android 12 -->
<full-backup-content>
<exclude domain="root"/>
<exclude domain="file"/>
<exclude domain="database"/>
<exclude domain="sharedpref"/>
<exclude domain="external"/>
</full-backup-content>
20 changes: 20 additions & 0 deletions android/src/main/res/xml/data_extraction_rules.xml
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="utf-8"?>
<!-- Do not allow system backups, including in device-transfer which ignores allowBackup, to not break Tailscale when restoring -->
<!-- It would be nice to have only preferences backed up or some mechanism in-app to solve issues caused by KeyStore not being backed up -->
<data-extraction-rules>
<cloud-backup>
<exclude domain="root"/>
<exclude domain="file"/>
<exclude domain="database"/>
<exclude domain="sharedpref"/>
<exclude domain="external"/>
</cloud-backup>

<device-transfer>
<exclude domain="root"/>
<exclude domain="file"/>
<exclude domain="database"/>
<exclude domain="sharedpref"/>
<exclude domain="external"/>
</device-transfer>
</data-extraction-rules>