build: add appstream metadata file

Makefile

@@ -9,6 +9,10 @@ run:
 install: install-resources
 	cargo install $(CARGO_ARGS) --path . --force --root $(DESTDIR)$(PREFIX)
 
+install-flatpak: install
+	mkdir -p /usr/share/swcatalog/yaml
+	cp desktop/com.github.Lyude.neovim-gtk.metainfo.yaml /app/share/metainfo/
+
 install-debug: install-resources
 	cargo install $(CARGO_ARGS) --debug --path . --force --root $(DESTDIR)$(PREFIX)
 

desktop/com.github.Lyude.neovim-gtk.metainfo.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0"?>
+<!-- Following https://www.freedesktop.org/software/appstream/docs/chap-CatalogData.html -->
+<components version="0.10">
+  <component type="desktop-application">
+    <id>com.github.Lyude.neovim-gtk</id>
+    <pkgname>-neovim-gtk</pkgname>
+    <name>neovim-gtk</name>
+    <summary>GTK UI for neovim written in rust using gtk-rs bindings</summary>
+    <description>
+     <p>GTK ui for neovim written in rust using gtk-rs bindings. With ligatures support. This project began as a fork of @daa84's neovim-gtk.</p>
+      <p>There are a very large number of improvements from @daa84's version, including:
+        <ul>
+          <li>Lots of bugfixes</li>
+          <li>We're fully ported to GTK4, and have a Snapshot based renderer instead of a cairo based renderer</li>
+          <li>Smooth resizing</li>
+        </ul> 
+      </p>
+    </description>
+    <project_license>GPL-3.0</project_license>
+    <keywords>
+      <keyword>neovim</keyword>
+      <keyword>vim</keyword>
+      <keyword>editor</keyword>
+    </keywords>
+    <icon type="cached">firefox.png</icon>
+    <categories>
+      <category>network</category>
+      <category>web</category>
+    </categories>
+    <url type="homepage">https://github.com/Lyude/neovim-gtk</url>
+    <screenshots>
+      <screenshot type="default">
+        <image type="source" width="916" height="668">https://raw.githubusercontent.com/Lyude/neovim-gtk/main/screenshots/neovimgtk-screen.png</image>
+      </screenshot>
+    </screenshots>
+  </component>
+</components>

desktop/com.github.Lyude.neovim-gtk.metainfo.yaml

@@ -0,0 +1,54 @@
+# Following https://www.freedesktop.org/software/appstream/docs/sect-AppStream-YAML.html
+---
+File: DEP-11
+Version: '0.8'
+Origin: chromodoris-main
+MediaBaseUrl: https://raw.githubusercontent.com/Lyude/neovim-gtk/main/
+---
+ID: com.github.Lyude.neovim-gtk
+Type: desktop-application
+Package: neovim-gtk
+Name:
+  C: neovim-gtk
+Summary:
+  C: GTK UI for neovim written in rust using gtk-rs bindings
+Description:
+  C: |
+    <p>GTK ui for neovim written in rust using gtk-rs bindings. With ligatures support. This project began as a fork of @daa84's neovim-gtk.</p>
+    <p>There are a very large number of improvements from @daa84's version, including:
+      <ul>
+        <li>Lots of bugfixes</li>
+        <li>We're fully ported to GTK4, and have a Snapshot based renderer instead of a cairo based renderer</li>
+        <li>Smooth resizing</li>
+      </ul> 
+    </p>
+Icon:
+  cached: desktop/com.github.Lyude.neovim-gtk_128.png
+Keywords:
+  C:
+    - editor
+    - neovim
+ProjectLicense: GPL-3.0
+Url:
+  homepage: https://github.com/Lyude/neovim-gtk
+Categories:
+  - Development
+#Provides:
+  #mediatypes:
+    #- text/x-tex
+Screenshots:
+  - default: true
+    source-image:
+      height: 668
+      url: screenshots/neovimgtk-screen.png
+      width: 916
+    #thumbnails:
+      #- height: 423
+        #url: texstudio_2.8.4+debian-3_amd64/screenshots/752x423/screenshot-1.png
+        #width: 752
+      #- height: 351
+        #url: texstudio_2.8.4+debian-3_amd64/screenshots/624x351/screenshot-1.png
+        #width: 624
+      #- height: 63
+        #url: texstudio_2.8.4+debian-3_amd64/screenshots/112x63/screenshot-1.png
+        #width: 112