- remove --nolock

- autodetect flatpak env and use alternative logic flow
- added `--rpc`

README.md

@@ -13,13 +13,23 @@ Got a question about development or a feature request? [Join our Discord!](https
 
 ## Installing
 
-### Stable
+### Flatpak via Flathub
+
+Visit our [Flathub page](https://flathub.org/apps/details/io.github.trigg.discover_overlay) or install via commandline
+
+```bash
+flatpak install io.github.trigg.discover_overlay
 ```
+
+
+
+### Stable
+```bash
 python3 -m pip install discover-overlay
 ```
 
 ### Latest Testing
-```
+```bash
 git clone https://github.com/trigg/Discover.git
 cd Discover
 python3 -m pip install .
@@ -76,6 +86,17 @@ Run `discover-overlay` if this fails it is most likely in `~/.local/bin/discover
 
 Comes with sane-enough default but has a configuration screen to tweak to your own use. Configuration can be reached either via System tray or by running `discover-overlay --configure`
 
+## Usage in Flatpak
+
+Due to a security feature of Flatpak we cannot currently detect an already-running process. Any call to `io.github.trigg.discover_overlay` will start a new overlay unless you also include `--rpc`.
+
+Examples:
+1) Start a new overlay and show configuration window
+`io.github.trigg.discover_overlay --configure`
+
+2) Show configuration window of already running overlay
+`io.github.trigg.discover_overlay --rpc --configure`
+
 ### Debugging
 If you are trying to debug on VS Code you are likely to get the following message:
 ```

discover_overlay/discover_overlay.py

@@ -88,8 +88,7 @@ class Discover:
             print("  -h, --help             This screen")
             print("      --hide             Hide overlay")
             print("      --show             Show overlay")
-            print(
-                "      --nolock           Do not use Lock or RPC. Helps for running in unpriviledged container")
+            print("      --rpc              Send command, not start new instance. Only needed if running in flatpak")
             print("")
             print("For gamescope compatibility ensure ENV has 'GDK_BACKEND=x11'")
             if normal_close:
@@ -262,11 +261,23 @@ def entrypoint():
     pid_file = os.path.join(config_dir, "discover_overlay.pid")
     rpc_file = os.path.join(config_dir, "discover_overlay.rpc")
     debug_file = os.path.join(config_dir, "output.txt")
-    if "--nolock" in sys.argv:
-        logging.getLogger().setLevel(logging.INFO)
-        logging.info("Nolock mode chosen")
-        Discover(rpc_file, debug_file, line)
+
+
+    # Flatpak compat mode
+
+    if "container" in os.environ and os.environ["container"] == "flatpak":
+        if "--rpc" in sys.argv:
+            with open(rpc_file, "w") as tfile:
+                tfile.write(line)
+                logging.warning("Sent RPC command")
+        else:
+            logging.getLogger().setLevel(logging.INFO)
+            logging.info("Flatpak compat mode started")
+            Discover(rpc_file, debug_file, line)
         return
+
+    # Normal usage
+
     try:
         with pidfile.PIDFile(pid_file):
             logging.getLogger().setLevel(logging.INFO)