feat: add appimage support for linux

Author: SMillerDev

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"
@@ -53,5 +54,9 @@ module Artifact
       ::Cask::Artifact::VstPlugin,
       ::Cask::Artifact::Vst3Plugin,
     ].freeze
+
+    LINUX_ONLY_ARTIFACTS = [
+      ::Cask::Artifact::AppImage,
+    ].freeze
   end
 end

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/cask.rb

@@ -164,17 +164,65 @@ def font?
     end
 
     sig { returns(T::Boolean) }
-    def supports_macos? = true
+    def supports_macos?
+      return true if font?
+
+      if @dsl.on_system_blocks_exist?
+        any_loaded = false
+        begin
+          [:arm, :intel].each do |arch|
+            bottle_tag = ::Utils::Bottles::Tag.new(system: :macos, arch: arch)
+            Homebrew::SimulateSystem.with_tag(bottle_tag) do
+              refresh
+
+              any_loaded = true
+              return false if artifacts.any? do |artifact|
+                ::Cask::Artifact::LINUX_ONLY_ARTIFACTS.include?(artifact.class)
+              end
+            end
+          end
+        rescue CaskInvalidError
+          # Invalid cask for macOS
+        ensure
+          refresh
+        end
+
+        return false if !any_loaded
+      end
+
+      true
+    end
 
     sig { returns(T::Boolean) }
     def supports_linux?
       return true if font?
 
-      return false if artifacts.any? do |artifact|
-        ::Cask::Artifact::MACOS_ONLY_ARTIFACTS.include?(artifact.class)
+      if @dsl.on_system_blocks_exist?
+        any_loaded = false
+        begin
+          [:arm, :intel].each do |arch|
+            bottle_tag = ::Utils::Bottles::Tag.new(system: :linux, arch: arch)
+            begin
+              Homebrew::SimulateSystem.with_tag(bottle_tag) do
+                refresh
+
+                any_loaded = true
+                return false if artifacts.any? do |artifact|
+                  ::Cask::Artifact::MACOS_ONLY_ARTIFACTS.include?(artifact.class)
+                end
+              rescue CaskInvalidError => e
+                # Invalid cask for Linux
+              end
+            end
+          end
+        ensure
+          refresh
+        end
+
+        return false if !any_loaded
       end
 
-      @dsl.os.present?
+      true
     end
 
     # The caskfile is needed during installation when there are

Library/Homebrew/cask/config.rb

@@ -16,6 +16,7 @@ class Config
     DEFAULT_DIRS = T.let(
       {
         appdir:               "/Applications",
+        appimagedir:          "~/Applications",
         keyboard_layoutdir:   "/Library/Keyboard Layouts",
         colorpickerdir:       "~/Library/ColorPickers",
         prefpanedir:          "~/Library/PreferencePanes",
@@ -49,6 +50,7 @@ def self.from_args(args)
       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

@@ -38,6 +38,7 @@ class DSL
     ORDINARY_ARTIFACT_CLASSES = [
       Artifact::Installer,
       Artifact::App,
+      Artifact::AppImage,
       Artifact::Artifact,
       Artifact::AudioUnitPlugin,
       Artifact::Binary,

Library/Homebrew/cli/parser.rb

@@ -66,6 +66,10 @@ def self.global_cask_options
             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/dev-cmd/generate-cask-ci-matrix.rb

@@ -67,7 +67,8 @@ def run
         pr_url = args.named if args.url?
         syntax_only = args.syntax_only?
 
-        repository = ENV.fetch("GITHUB_REPOSITORY", nil)
+        # repository = ENV.fetch("GITHUB_REPOSITORY", nil)
+        repository = "Homebrew/homebrew-cask" # For testing
         raise UsageError, "The `$GITHUB_REPOSITORY` environment variable must be set." if repository.blank?
 
         tap = T.let(Tap.fetch(repository), Tap)
@@ -127,16 +128,20 @@ def run
 
       sig { params(cask: Cask::Cask).returns(T::Hash[T::Hash[Symbol, T.any(Symbol, String)], Float]) }
       def filter_runners(cask)
-        filtered_macos_runners = RUNNERS.select do |runner, _|
-          runner[:symbol] != :linux &&
-            cask.depends_on.macos.present? &&
-            cask.depends_on.macos.allows?(MacOSVersion.from_symbol(T.must(runner[:symbol]).to_sym))
-        end
+        if cask.supports_macos?
+          filtered_macos_runners = RUNNERS.select do |runner, _|
+            runner[:symbol] != :linux &&
+              cask.depends_on.macos.present? &&
+              cask.depends_on.macos.allows?(MacOSVersion.from_symbol(T.must(runner[:symbol]).to_sym))
+          end
 
-        filtered_runners = if filtered_macos_runners.any?
-          filtered_macos_runners
+          filtered_runners = if filtered_macos_runners.any?
+            filtered_macos_runners
+          else
+            RUNNERS.dup
+          end
         else
-          RUNNERS.dup
+          filtered_runners = {}
         end
 
         filtered_runners = filtered_runners.merge(LINUX_RUNNERS) if cask.supports_linux?
@@ -151,6 +156,7 @@ def filter_runners(cask)
 
       sig { params(cask: Cask::Cask).returns(T::Array[Symbol]) }
       def architectures(cask:)
+
         return RUNNERS.keys.map { |r| r.fetch(:arch).to_sym }.uniq.sort if cask.depends_on.arch.blank?
 
         cask.depends_on.arch.map { |arch| arch[:type] }.uniq.sort

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/linux/cask/installer.rb

@@ -11,9 +11,7 @@ module Installer
 
         sig { void }
         def check_stanza_os_requirements
-          return unless artifacts.any? do |artifact|
-            ::Cask::Artifact::MACOS_ONLY_ARTIFACTS.include?(artifact.class)
-          end
+          return unless @cask.supports_linux?
 
           raise ::Cask::CaskError, "macOS is required for this software."
         end

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

@@ -0,0 +1,23 @@
+# typed: strict
+# frozen_string_literal: true
+
+module OS
+  module Mac
+    module Cask
+      module Installer
+        extend T::Helpers
+
+        requires_ancestor { ::Cask::Installer }
+
+        sig { void }
+        def check_stanza_os_requirements
+          return unless @cask.supports_macos?
+
+          raise ::Cask::CaskError, "Linux is required for this software."
+        end
+      end
+    end
+  end
+end
+
+Cask::Installer.prepend(OS::Mac::Cask::Installer)