AppImage fixes and improvements (#110)

Currently the appimages work fine, however I realized there's some room to improve on following the standards and a bit of cleaning.

AppImages now follow the linux FHS and a `.DirIcon` to follow the Spec closer, along with changing the icon and desktop file names (the resulting AppImage will have the same name, it's only used internally)

Metadata has been added, it helps with applications meant to manage appimages, as well as a future possible auto-updater.

The icon has been replaced temporarily as we wait for the updated one, just taken from the windows .ico. The `.DirIcon` needs to be a PNG, however `app.ryujinx.Ryujinx.png` can be an svg as well for some reason.

The launcher script may not need to exist (gamemode and envvars), but as to not break anything the important things have been kept.

The commits messages of this PR contain information as to why each change was made.

Reviewed-on: https://git.ryujinx.app/projects/Ryubing/pulls/110

distribution/linux/Ryujinx.sh

@@ -1,23 +1,11 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 SCRIPT_DIR=$(dirname "$(realpath "$0")")
 
-if [ -f "$SCRIPT_DIR/Ryujinx.Headless.SDL3" ]; then
-    RYUJINX_BIN="Ryujinx.Headless.SDL3"
-fi
-
-if [ -f "$SCRIPT_DIR/Ryujinx" ]; then
-    RYUJINX_BIN="Ryujinx"
-fi
-
-if [ -z "$RYUJINX_BIN" ]; then
-    exit 1
-fi
-
 COMMAND="env LANG=C.UTF-8 DOTNET_EnableAlternateStackCheck=1"
 
 if command -v gamemoderun > /dev/null 2>&1; then
     COMMAND="$COMMAND gamemoderun"
 fi
 
-exec $COMMAND "$SCRIPT_DIR/$RYUJINX_BIN" "$@"
+exec $COMMAND "$SCRIPT_DIR/Ryujinx" "$@"

distribution/linux/app.ryujinx.Ryujinx.desktop

@@ -1,14 +1,12 @@
 [Desktop Entry]
-Version=1.0
+Version=1.5
 Name=Ryujinx
 Type=Application
-Icon=Ryujinx
+Icon=app.ryujinx.Ryujinx
 Exec=Ryujinx.sh %f
-Comment=A Nintendo Switch Emulator
 GenericName=Nintendo Switch Emulator
 Terminal=false
 Categories=Game;Emulator;
 MimeType=application/x-nx-nca;application/x-nx-nro;application/x-nx-nso;application/x-nx-nsp;application/x-nx-xci;
-Keywords=Switch;Nintendo;Emulator;
 StartupWMClass=Ryujinx
 PrefersNonDefaultGPU=true

distribution/linux/appimage/AppRun

@@ -1,3 +0,0 @@
-#!/bin/sh
-CURRENTDIR="$(readlink -f "$(dirname "$0")")"
-exec "$CURRENTDIR"/usr/bin/Ryujinx.sh "$@"

distribution/linux/appimage/app.ryujinx.Ryujinx.appdata.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+	<id>app.ryujinx.Ryujinx</id>
+	<metadata_license>MIT</metadata_license>
+	<project_license>MIT</project_license>
+	<name>Ryujinx</name>
+	<summary>Nintendo Switch 1 emulator written in C#</summary>
+	<description>
+		<p>Ryujinx is an open-source Nintendo Switch emulator, originally created by gdkchan, written in C#.</p>
+	</description>
+	<launchable type="desktop-id">app.ryujinx.Ryujinx.desktop</launchable>
+	<url type="homepage">https://ryujinx.app/</url>
+	<developer id="app.ryujinx">
+		<name>Ryubing</name>
+	</developer>
+	<screenshots>
+		<screenshot type="default">
+			<image>https://git.ryujinx.app/projects/Ryubing/raw/branch/master/docs/shell.png</image>
+		</screenshot>
+	</screenshots>
+	<provides>
+		<id>app.ryujinx.Ryujinx.desktop</id>
+	</provides>
+	<content_rating type="oars-1.1" />
+</component>

distribution/linux/appimage/build-appimage.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 set -eu
 
 ROOTDIR="$(readlink -f "$(dirname "$0")")"/../../../
@@ -7,20 +7,33 @@ cd "$ROOTDIR"
 BUILDDIR=${BUILDDIR:-publish}
 OUTDIR=${OUTDIR:-publish_appimage}
 
+# AppStream
+
 rm -rf AppDir
-mkdir -p AppDir/usr/bin
+mkdir -p AppDir/usr/lib AppDir/usr/bin
+mkdir -p AppDir/usr/share/metainfo AppDir/usr/share/applications
+mkdir -p AppDir/usr/share/icons/hicolor/256x256/apps/
 
-cp distribution/linux/Ryujinx.desktop AppDir/Ryujinx.desktop
-cp distribution/linux/appimage/AppRun AppDir/AppRun
-cp distribution/misc/Logo.svg AppDir/Ryujinx.svg
+cp -r "$BUILDDIR"/* AppDir/usr/lib/
 
+cp distribution/linux/appimage/app.ryujinx.Ryujinx.appdata.xml AppDir/usr/share/metainfo/app.ryujinx.Ryujinx.appdata.xml
+cp distribution/linux/app.ryujinx.Ryujinx.desktop AppDir/usr/share/applications/app.ryujinx.Ryujinx.desktop
+cp distribution/misc/Logo.png AppDir/usr/share/icons/hicolor/256x256/apps/app.ryujinx.Ryujinx.png
+ln -s ../lib/Ryujinx AppDir/usr/bin/Ryujinx
 
-cp -r "$BUILDDIR"/* AppDir/usr/bin/
+# AppImage Root
+
+ln -s ./usr/share/applications/app.ryujinx.Ryujinx.desktop AppDir/app.ryujinx.Ryujinx.desktop
+ln -s ./usr/share/icons/hicolor/256x256/apps/app.ryujinx.Ryujinx.png AppDir/.DirIcon
+ln -s ./usr/share/icons/hicolor/256x256/apps/app.ryujinx.Ryujinx.png AppDir/app.ryujinx.Ryujinx.png
+ln -s ./usr/lib/Ryujinx.sh AppDir/AppRun
 
 # Ensure necessary bins are set as executable
 chmod +x AppDir/AppRun AppDir/usr/bin/Ryujinx*
 
 mkdir -p "$OUTDIR"
 
+# The "-n" flag removes the appstream checks during build, in case the main website is down.
+# Run "appstreamcli validate --explain AppDir/usr/share/metainfo/app.ryujinx.Ryujinx.appdata.xml" to check manually
 appimagetool --appimage-extract-and-run -n --comp zstd --mksquashfs-opt -Xcompression-level --mksquashfs-opt 21 \
-    AppDir "$OUTDIR"/Ryujinx.AppImage
+    AppDir "$OUTDIR"/Ryujinx.AppImage