notesnook: add Linux support using AppImage

Author: ta7mid

Casks/n/notesnook.rb

@@ -1,28 +1,44 @@
 cask "notesnook" do
-  arch arm: "arm64", intel: "x64"
+  arch arm: "arm64", intel: on_system_conditional(macos: "x64", linux: "x86_64")
+  os macos: "mac", linux: "linux"
+  url_end = on_system_conditional macos: "dmg", linux: "AppImage"
+  livecheck_folder = on_system_conditional macos: "darwin", linux: "linux"
 
   version "3.4.8"
-  sha256 arm:   "94f23dc0423303f0e48c148a03f12793745d1be9f0f7011b632ce6a7bc900f2d",
-         intel: "5f1a2de29fc5e01f68c98335be34541b7dc2478a09272d1f35917915fa9e177c"
+  sha256 arm:          "94f23dc0423303f0e48c148a03f12793745d1be9f0f7011b632ce6a7bc900f2d",
+         intel:        "5f1a2de29fc5e01f68c98335be34541b7dc2478a09272d1f35917915fa9e177c",
+         arm64_linux:  "6ea076415b1ea4ccb30ce435a4e65793aa77470aa498df0f9e1caf94c1898592",
+         x86_64_linux: "980b4685800f5cf19e99a45429f363bd8d8b466d10ba965e9c10dc941bf4ddb3"
 
-  url "https://github.com/streetwriters/notesnook/releases/download/v#{version}/notesnook_mac_#{arch}.dmg"
+  on_macos do
+    app "Notesnook.app"
+
+    zap trash: [
+      "~/Library/Application Support/Notesnook",
+      "~/Library/Logs/Notesnook",
+      "~/Library/Preferences/com.streetwriters.notesnook.plist",
+    ]
+  end
+  on_linux do
+    app_image "notesnook_linux_#{arch}.AppImage", target: "Notesnook.AppImage"
+
+    zap trash: [
+      "~/.cache/@notesnookdesktop-updater",
+      "~/.cache/notesnook",
+      "~/.config/autostart/notesnook.desktop",
+      "~/.config/Notesnook",
+    ]
+  end
+
+  url "https://github.com/streetwriters/notesnook/releases/download/v#{version}/notesnook_#{os}_#{arch}.#{url_end}"
   name "Notesnook"
   desc "Privacy-focused note taking app"
   homepage "https://notesnook.com/"
 
   livecheck do
-    url "https://notesnook.com/api/v1/releases/darwin/latest/latest-mac.yml"
+    url "https://notesnook.com/api/v1/releases/#{livecheck_folder}/latest/latest-#{os}.yml"
     strategy :electron_builder
   end
 
   auto_updates true
-  depends_on :macos
-
-  app "Notesnook.app"
-
-  zap trash: [
-    "~/Library/Application Support/Notesnook",
-    "~/Library/Logs/Notesnook",
-    "~/Library/Preferences/com.streetwriters.notesnook.plist",
-  ]
 end