feat: add appimage support for linux

Library/Homebrew/cask/artifact.rb

@@ -2,6 +2,7 @@
 # frozen_string_literal: true
 
 require "cask/artifact/app"
+require "cask/artifact/appimage"
 require "cask/artifact/artifact" # generic 'artifact' stanza
 require "cask/artifact/audio_unit_plugin"
 require "cask/artifact/binary"

Library/Homebrew/cask/artifact/appimage.rb

@@ -0,0 +1,15 @@
+# typed: strict
+# frozen_string_literal: true
+
+require "cask/artifact/symlinked"
+
+module Cask
+  module Artifact
+    class AppImage < Symlinked
+      sig { params(target: T.any(String, Pathname)).returns(Pathname) }
+      def resolve_target(target)
+        config.appimagedir/target
+      end
+    end
+  end
+end

Library/Homebrew/cask/config.rb

@@ -15,6 +15,7 @@ module Cask
     DEFAULT_DIRS = T.let(
       {
         appdir:               "/Applications",
+        appimagedir:          "~/Applications",
         keyboard_layoutdir:   "/Library/Keyboard Layouts",
         colorpickerdir:       "~/Library/ColorPickers",
         prefpanedir:          "~/Library/PreferencePanes",
@@ -47,6 +48,7 @@ module Cask
       args = T.unsafe(args)
       new(explicit: {
         appdir:               args.appdir,
+        appimagedir:          args.appimagedir,
         keyboard_layoutdir:   args.keyboard_layoutdir,
         colorpickerdir:       args.colorpickerdir,
         prefpanedir:          args.prefpanedir,

Library/Homebrew/cask/dsl.rb

@@ -34,6 +34,7 @@ module Cask
     ORDINARY_ARTIFACT_CLASSES = [
       Artifact::Installer,
       Artifact::App,
+      Artifact::AppImage,
       Artifact::Artifact,
       Artifact::AudioUnitPlugin,
       Artifact::Binary,

Library/Homebrew/cli/parser.rb

@@ -63,6 +63,10 @@ module Homebrew
             description: "Target location for Applications " \
                          "(default: `#{Cask::Config::DEFAULT_DIRS[:appdir]}`).",
           }],
+          [:flag, "--appimagedir=", {
+            description: "Target location for AppImages " \
+                         "(default: `#{Cask::Config::DEFAULT_DIRS[:appimagedir]}`).",
+          }],
           [:flag, "--keyboard-layoutdir=", {
             description: "Target location for Keyboard Layouts " \
                          "(default: `#{Cask::Config::DEFAULT_DIRS[:keyboard_layoutdir]}`).",

Library/Homebrew/extend/os/cask/installer.rb

@@ -2,3 +2,4 @@
 # frozen_string_literal: true
 
 require "extend/os/linux/cask/installer" if OS.linux?
+require "extend/os/mac/cask/installer" if OS.mac?

Library/Homebrew/extend/os/mac/cask/installer.rb

@@ -0,0 +1,29 @@
+# typed: strict
+# frozen_string_literal: true
+
+module OS
+  module Mac
+    module Cask
+      module Installer
+        extend T::Helpers
+
+        requires_ancestor { ::Cask::Installer }
+
+        MAC_INVALID_ARTIFACTS = [
+          ::Cask::Artifact::AppImage,
+        ].freeze
+
+        sig { void }
+        def check_stanza_os_requirements
+          return unless artifacts.any? do |artifact|
+            MAC_INVALID_ARTIFACTS.include?(artifact.class)
+          end
+
+          raise ::Cask::CaskError, "Linux is required for this software."
+        end
+      end
+    end
+  end
+end
+
+Cask::Installer.prepend(OS::Mac::Cask::Installer)