FileBrowser Quantum: migrate the config and database to v2 (#17815)

v2.0.0 reads the config strictly and stops at the v1 keys the addon
wrote (server.port, conditionals, indexingIntervalMinutes). It also only
imports the old BoltDB when server.database.migrateFrom names it and no
database.db is left in the working directory. The update now rewrites
the config, renames the database and points migrateFrom at it, keeping
a copy of the v1 config. New installs write the v2 layout.

tools/addon/filebrowser-quantum.sh

@@ -96,6 +96,27 @@ if [[ -f "$LEGACY_DB" || -f "$LEGACY_BIN" && ! -f "$CONFIG_PATH" ]]; then
   fi
 fi
 
+# v2 rejects v1 config keys and imports the BoltDB on its first start
+migrate_v1_config() {
+  local dir="/usr/local/community-scripts" db=0
+  [[ -s "$dir/database.db" && ! -s "$dir/filebrowser.sqlite" ]] && db=1
+  ((db)) || grep -qE 'conditionals:|indexingIntervalMinutes:' "$CONFIG_PATH" || return 0
+  cp "$CONFIG_PATH" "${CONFIG_PATH}.v1.bak"
+  ((db)) && mv "$dir/database.db" "$dir/database.db.old"
+  awk -v db="$db" '
+    { match($0, /^ */); ind = RLENGTH }
+    /^[^ #]/ { top = $1 }
+    cond && ind > ci { print substr($0, 3); next }
+    { cond = 0 }
+    /^[[:space:]]*conditionals:[[:space:]]*$/ { cond = 1; ci = ind; next }
+    /^[[:space:]]*indexingIntervalMinutes:/ { next }
+    top == "server:" && /^  port:/ { port = $2; next }
+    { print }
+    /^server:/ && db { print "  database:"; print "    migrateFrom: \"database.db.old\"" }
+    END { if (port != "") { print "http:"; print "  port: " port } }
+  ' "${CONFIG_PATH}.v1.bak" >"$CONFIG_PATH"
+}
+
 # Existing installation
 if [[ -f "$INSTALL_PATH" ]]; then
   msg_warn "${APP} is already installed."
@@ -126,6 +147,7 @@ if [[ -f "$INSTALL_PATH" ]]; then
       mv -f /usr/local/bin/filebrowser-quantum "$INSTALL_PATH"
       if [[ -f "$CONFIG_PATH" ]]; then
         sed -i '/^\s*disableIndexing:/d' "$CONFIG_PATH"
+        migrate_v1_config
       fi
       if [[ "$OS" == "Debian" ]]; then
         systemctl restart filebrowser.service
@@ -173,22 +195,21 @@ read -r noauth_prompt
 # === YAML CONFIG GENERATION ===
 if [[ "${noauth_prompt,,}" =~ ^(y|yes)$ ]]; then
   cat <<EOF >"$CONFIG_PATH"
-server:
+http:
   port: $PORT
+server:
   sources:
     - path: "$SRC_DIR"
       name: "RootFS"
       config:
         denyByDefault: false
-        indexingIntervalMinutes: 240
-        conditionals:
-          rules:
-            - neverWatchPath: "/proc"
-            - neverWatchPath: "/sys"
-            - neverWatchPath: "/dev"
-            - neverWatchPath: "/run"
-            - neverWatchPath: "/tmp"
-            - neverWatchPath: "/lost+found"
+        rules:
+          - neverWatchPath: "/proc"
+          - neverWatchPath: "/sys"
+          - neverWatchPath: "/dev"
+          - neverWatchPath: "/run"
+          - neverWatchPath: "/tmp"
+          - neverWatchPath: "/lost+found"
 auth:
   methods:
     noauth: true
@@ -196,22 +217,21 @@ EOF
   msg_ok "Configured with no authentication"
 else
   cat <<EOF >"$CONFIG_PATH"
-server:
+http:
   port: $PORT
+server:
   sources:
     - path: "$SRC_DIR"
       name: "RootFS"
       config:
         denyByDefault: false
-        indexingIntervalMinutes: 240
-        conditionals:
-          rules:
-            - neverWatchPath: "/proc"
-            - neverWatchPath: "/sys"
-            - neverWatchPath: "/dev"
-            - neverWatchPath: "/run"
-            - neverWatchPath: "/tmp"
-            - neverWatchPath: "/lost+found"
+        rules:
+          - neverWatchPath: "/proc"
+          - neverWatchPath: "/sys"
+          - neverWatchPath: "/dev"
+          - neverWatchPath: "/run"
+          - neverWatchPath: "/tmp"
+          - neverWatchPath: "/lost+found"
 auth:
   adminUsername: admin
   adminPassword: community-scripts.org