Fix release asset ordering so the in-app updater fetches the APK

app/src/main/java/eu/faircode/netguard/ServiceSinkhole.java

@@ -803,22 +803,24 @@ private void checkUpdate() {
                 JSONObject jroot = jarray.getJSONObject(0);
                 // JSONObject jroot = new JSONObject(json.toString());
                 if (jroot.has("tag_name") && jroot.has("html_url") && jroot.has("assets")) {
+                    // Always link to the release page rather than a specific
+                    // asset: the user picks the right download there, and
+                    // the notification doesn't depend on asset ordering.
                     String url = jroot.getString("html_url");
                     JSONArray jassets = jroot.getJSONArray("assets");
                     if (jassets.length() > 0) {
-                        JSONObject jasset = jassets.getJSONObject(0);
-                        if (jasset.has("name")) {
-                            long available = jroot.getLong("tag_name");
-                            String name = jasset.getString("name");
-                            Log.i(TAG, "Tag " + available + " name " + name + " url " + url);
-
-                            long current = Util.getSelfVersionCode(ServiceSinkhole.this);
-                            if (current < available) {
-                                Log.i(TAG, "Update available from " + current + " to " + available);
-                                showUpdateNotification(name, url);
-                            } else
-                                Log.i(TAG, "Up-to-date current version " + current);
-                        }
+                        long available = jroot.getLong("tag_name");
+                        String name = (jroot.has("name") && !jroot.isNull("name") && jroot.getString("name").length() > 0)
+                                ? jroot.getString("name")
+                                : getString(R.string.title_version, available);
+                        Log.i(TAG, "Tag " + available + " name " + name + " url " + url);
+
+                        long current = Util.getSelfVersionCode(ServiceSinkhole.this);
+                        if (current < available) {
+                            Log.i(TAG, "Update available from " + current + " to " + available);
+                            showUpdateNotification(name, url);
+                        } else
+                            Log.i(TAG, "Up-to-date current version " + current);
                     }
                 }
             } catch (JSONException ex) {

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

@@ -346,6 +346,7 @@ Your internet traffic is not being sent to a remote VPN server.</string>
     <string name="msg_inactive">No active internet connection</string>
     <string name="msg_queue">TrackerControl is busy</string>
     <string name="msg_update">Update available, tap to download</string>
+    <string name="title_version">Version %1$d</string>
     <string name="msg_usage">You can allow (greenish) or deny (reddish) Wi-Fi or mobile internet access by tapping on the icons next to an app</string>
     <string name="msg_push">Incoming (push) messages are mostly handled by the system component Play services, which is allowed internet access by default</string>
     <string name="msg_system">Managing all (system) apps can be enabled in the settings</string>

docs/RELEASING.md

@@ -65,8 +65,14 @@ The script writes the signed APK and verification metadata to
 `output/release-2026071301/` and creates a draft GitHub release containing:
 
 - `TrackerControl-githubRelease-latest.apk`
-- `SHA256SUMS.txt`
-- `BUILD-INFO.txt`
+- `TrackerControl-githubRelease-latest.apk.sha256sums`
+- `TrackerControl-githubRelease-latest.apk.build-info.txt`
+
+The two metadata files are named with the APK filename as a prefix so they
+always sort alphabetically after it. The GitHub API returns release assets
+ordered by name, and the app's in-app update checker always downloads
+`assets[0]`; without this ordering it can fetch `BUILD-INFO.txt` instead of
+the APK (#681).
 
 Install and test the APK from the draft, then publish the release in GitHub.
 

scripts/build_and_sign.sh

@@ -129,9 +129,14 @@ readonly OUTPUT_DIR=${RELEASE_OUTPUT_DIR:-"$ROOT/output/release-$TAG"}
 mkdir -p "$OUTPUT_DIR"
 readonly ALIGNED_APK="$TEMP_DIR/TrackerControl-githubRelease-aligned.apk"
 readonly TEMP_SIGNED_APK="$TEMP_DIR/TrackerControl-githubRelease-signed.apk"
+# Asset names must sort alphabetically after the APK: the GitHub API
+# returns release assets ordered by name, and the app's update checker
+# (ServiceSinkhole#checkUpdate) always takes assets[0] as the download.
+# Using the APK filename as a literal prefix guarantees it sorts first
+# under any lexicographic comparison, regardless of case-folding rules.
 readonly SIGNED_APK="$OUTPUT_DIR/TrackerControl-githubRelease-latest.apk"
-readonly SIGNED_SUMS="$OUTPUT_DIR/SHA256SUMS.txt"
-readonly OUTPUT_BUILD_INFO="$OUTPUT_DIR/BUILD-INFO.txt"
+readonly SIGNED_SUMS="$OUTPUT_DIR/TrackerControl-githubRelease-latest.apk.sha256sums"
+readonly OUTPUT_BUILD_INFO="$OUTPUT_DIR/TrackerControl-githubRelease-latest.apk.build-info.txt"
 [[ ! -e $SIGNED_APK ]] || fail "signed output already exists: $SIGNED_APK"
 
 printf 'Aligning and signing the APK...\n'