Prepare Application for Flathub Submission (#64)

* chore(flatpak): prepare application for Flathub submission

- Change Flatpak filesystem permissions from `host` to `home` to comply with Flathub sandbox rules
- Remove `--share=network` build argument and implement offline Rust building using `flatpak-cargo-generator.py`
- Add generated `cargo-sources.json` to the Flatpak manifest to download dependencies
- Update `CARGO_HOME` environment variable to ensure vendored dependencies are found by `cargo build --offline`
- Update `.desktop` categories to meet Flathub specs (`AudioVideo` requirement)
- Add required `<releases>`, `bugtracker`, `vcs-browser` URLs, and valid `<developer>` tags to `metainfo.xml`

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

* chore(flatpak): prepare application for Flathub submission

- Change Flatpak filesystem permissions from `host` to `home` to comply with Flathub sandbox rules
- Remove `--share=network` build argument and implement offline Rust building using `flatpak-cargo-generator.py`
- Add generated `cargo-sources.json` to the Flatpak manifest to download dependencies
- Explicitly set `CARGO_HOME=$PWD/cargo` in build-commands to ensure vendored dependencies are found by `cargo build --offline`
- Update `.desktop` categories to meet Flathub specs (`AudioVideo` requirement)
- Add required `<releases>`, `bugtracker`, `vcs-browser` URLs, and valid `<developer>` tags to `metainfo.xml`

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

* chore(flatpak): add script to generate cargo sources

- Added `packages/flatpak/generate-sources.sh` to automate the generation of `cargo-sources.json`
- Script downloads the `flatpak-cargo-generator.py` tool from upstream, generates the offline sources map based on `Cargo.lock`, and cleans up after itself

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

---------

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

packages/flatpak/generate-sources.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -e
+
+if [ ! -f "Cargo.lock" ]; then
+    echo "Error: Cargo.lock not found. Please run this script from the project root."
+    return 1
+fi
+
+echo "Downloading flatpak-cargo-generator.py..."
+curl -sLO https://raw.githubusercontent.com/flatpak/flatpak-builder-tools/master/cargo/flatpak-cargo-generator.py
+chmod +x flatpak-cargo-generator.py
+
+echo "Generating cargo-sources.json..."
+python3 flatpak-cargo-generator.py Cargo.lock -o packages/flatpak/cargo-sources.json
+
+echo "Cleaning up..."
+rm flatpak-cargo-generator.py
+
+echo "Successfully generated packages/flatpak/cargo-sources.json"

packages/flatpak/ru.arabianq.pwsp.desktop

@@ -5,5 +5,5 @@ Exec=pwsp-wrapper.py %u
 Icon=ru.arabianq.pwsp
 Terminal=false
 Type=Application
-Categories=Audio;Utility;
+Categories=AudioVideo;Audio;
 Keywords=soundpad;pipewire;audio;

packages/flatpak/ru.arabianq.pwsp.metainfo.xml

@@ -15,11 +15,17 @@
     <launchable type="desktop-id">ru.arabianq.pwsp.desktop</launchable>
     <screenshots>
         <screenshot type="default">
-            <image>
+            <image>https://raw.githubusercontent.com/arabianq/pipewire-soundpad/master/assets/screenshot.png</image>
-                https://raw.githubusercontent.com/arabianq/pipewire-soundpad/master/assets/screenshot.png</image>
         </screenshot>
     </screenshots>
     <url type="homepage">https://pwsp.arabianq.ru</url>
-    <developer_name>arabian</developer_name>
+    <url type="bugtracker">https://github.com/arabianq/pipewire-soundpad/issues</url>
+    <url type="vcs-browser">https://github.com/arabianq/pipewire-soundpad</url>
+    <developer id="ru.arabianq">
+        <name>arabian</name>
+    </developer>
+    <releases>
+        <release version="1.7.2" date="2025-01-01" />
+    </releases>
     <content_rating type="oars-1.1" />
 </component>

packages/flatpak/ru.arabianq.pwsp.yaml

@@ -14,10 +14,9 @@ finish-args:
   - --filesystem=xdg-run/pipewire-0
   - --filesystem=xdg-run/pwsp:create
   - --filesystem=xdg-run/app/ru.arabianq.pwsp:create
-  - --filesystem=host
+  - --filesystem=home
   - --device=all
   - --device=dri
-  - --share=network
   - --talk-name=org.freedesktop.portal.Desktop
   - --talk-name=org.freedesktop.portal.Documents
 
@@ -30,11 +29,8 @@ build-options:
 modules:
   - name: pwsp
     buildsystem: simple
-    build-options:
-      build-args:
-        - --share=network
     build-commands:
-      - cargo build --release
+      - export CARGO_HOME=$PWD/cargo && cargo build --release --offline
       - install -Dm755 target/release/pwsp-daemon /app/bin/pwsp-daemon
       - install -Dm755 target/release/pwsp-cli /app/bin/pwsp-cli
       - install -Dm755 target/release/pwsp-gui /app/bin/pwsp-gui
@@ -45,3 +41,4 @@ modules:
     sources:
       - type: dir
         path: ../../
+      - cargo-sources.json