Flatpak build support (#112)

* Use XDG_CONFIG_HOME

* Migrate from config v0 to v1

* Start work on Flatpak packaging

* add Keywords, StartupNotify and improve the Comment

* Sync w/ upstream flatpak branch

* Fixes for egui transition

* More flatpak fixes

* Fix icon error

* add itch folder to permissions

* Fix main after rebase

Co-authored-by: casept <davids.paskevics@gmail.com>
Co-authored-by: jrt <git@jrtberlin.de>

.gitignore

@@ -5,3 +5,7 @@ config.toml
 .thumbnails
 thumbnails
 .flatpak-builder
+flatpak/.flatpak-builder
+flatpak/build-dir
+flatpak/repo
+.flatpak-builder

.gitmodules

@@ -0,0 +1,6 @@
+[submodule "shared-modules"]
+	path = flatpak/shared-modules
+	url = https://github.com/flathub/shared-modules
+[submodule "flatpak/flatpak-builder-tools"]
+	path = flatpak/flatpak-builder-tools
+	url = https://github.com/flatpak/flatpak-builder-tools

flatpak/dk.philipk.BoilR.appdata.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Philip Kristoffersen 2022 <philipkristoffersen@gmail.com> -->
+<component type="desktop-application">
+  <id>dk.philipk.BoilR</id>
+  <metadata_license>CC0</metadata_license>
+  <project_license>MIT/APACHE</project_license>
+  <name>BoilR</name>
+  <summary>Add non-steam games to your steam library</summary>
+  <description>
+    <p>This little tool will show games from other games platforms in your Steam library.
+        It uses the Steam 3rd party shortcuts feature and does not require you to set up anything.
+        The goal is that you do not have to leave your Steam library to launch games from other launchers/stores, so that you can find all the games that you have available.
+      Optionally you can set BoilR up to automatically download artwork from SteamGridDB.</p>
+  </description>
+  <screenshots>
+    <screenshot type="default">
+      <image>https://raw.githubusercontent.com/PhilipK/BoilR/v.1.2.3/screenshot_1.png</image>
+      <caption>Main Window</caption>
+    </screenshot>
+  </screenshots>
+  <url type="homepage">https://github.com/PhilipK/BoilR</url>
+<!--
+Open Age Rating Service
+https://hughsie.github.io/oars/index.html
+-->
+  <content_rating type="oars-1.1" />
+  <releases>
+    <release version="0.9.19" date="2022-03-27">
+      <description>
+        <p>First Flatpak Release of BoilR</p>
+      </description>
+    </release>
+  </releases>
+  <developer_name>Philip Kristoffersen</developer_name>
+  <update_contact>philipkristoffersen@gmail.com</update_contact>
+
+  <launchable type="desktop-id">dk.philipk.BoilR.desktop</launchable>
+</component>

flatpak/dk.philipk.BoilR.desktop

@@ -0,0 +1,13 @@
+[Desktop Entry]
+Version=1.0
+Type=Application
+
+Name=BoilR
+Comment=Add non-steam games to your steam library
+Categories=Utility;Amusement;
+Keywords=Steam;Heroic;Lutris;Itch;Origin;GOG;UPlay;Icons;Images;Non-Steam;Games;
+
+Icon=dk.philipk.BoilR
+Exec=boilr
+Terminal=false
+StartupNotify=true

flatpak/dk.philipk.BoilR.yml

@@ -0,0 +1,70 @@
+app-id: dk.philipk.BoilR
+command: boilr
+runtime: org.freedesktop.Platform
+runtime-version: '21.08'
+sdk: org.freedesktop.Sdk
+sdk-extensions:
+  - org.freedesktop.Sdk.Extension.rust-stable
+build-options:
+  append-path: /usr/lib/sdk/rust-stable/bin
+  env:
+    # To pick up vendored deps
+    CARGO_HOME: /run/build/boilr/cargo
+    RUSTFLAGS: "-L /app/lib/"
+
+command: boilr
+finish-args:
+  - --filesystem=xdg-data/Steam:rw
+  - --filesystem=~/.steam:rw # Steam (Non-flatpak)
+  - --filesystem=~/.var/app/com.valvesoftware.Steam:rw # Steam (Flatpak)
+  - --filesystem=xdg-data/lutris:rw # Lutris (non-flatpak)
+  - --filesystem=~/.var/app/net.lutris.Lutris:rw # Lutris (Flatpak)
+  - --filesystem=~/Games/Heroic:rw # Heroic (non-flatpak)
+  - --filesystem=~/.var/app/com.heroicgameslauncher.hgl:rw # Heroic (Flatpak)
+  - --filesystem=~/.config/itch:rw # Itch
+
+  - --share=network
+  - --share=ipc
+  - --socket=fallback-x11
+  - --socket=wayland
+  - --device=dri
+
+  - --env=PATH=/app/bin:/usr/bin
+
+modules:
+  - shared-modules/glu/glu-9.json
+
+  - name: boilr
+    buildsystem: simple
+    sources:
+      - type: dir
+        path: ../
+      - cargo-lock.json
+    build-commands:
+      - cargo --offline fetch --manifest-path Cargo.toml --verbose
+      - cargo --offline build --release --verbose
+      - install -Dm755 ./target/release/boilr -t /app/bin/
+
+  - name: boilr-icon
+    buildsystem: simple
+    sources:
+      - type: file
+        path: ../resources/dk.philipk.BoilR.png
+    build-commands:
+      - install -Dm644 dk.philipk.BoilR.png  -t /app/share/icons/hicolor/32x32/apps
+
+  - name: boilr-desktop
+    buildsystem: simple
+    sources:
+      - type: file
+        path: dk.philipk.BoilR.desktop
+    build-commands:
+      - install -Dm644 dk.philipk.BoilR.desktop -t /app/share/applications/
+
+  - name: boilr-appinfo
+    buildsystem: simple
+    sources:
+      - type: file
+        path: dk.philipk.BoilR.appdata.xml
+    build-commands:
+      - install -Dm644 dk.philipk.BoilR.appdata.xml -t /app/share/metainfo/