Move fonts instead of hardlinking them (Homebrew#23728)

lib/hbc/artifact/font.rb

@@ -1,4 +1,4 @@
-require "hbc/artifact/hardlinked"
+require "hbc/artifact/moved"
 
-class Hbc::Artifact::Font < Hbc::Artifact::Hardlinked
+class Hbc::Artifact::Font < Hbc::Artifact::Moved
 end

lib/hbc/artifact/symlinked.rb

@@ -1,6 +1,6 @@
-require "hbc/artifact/linked"
+require "hbc/artifact/relocated"
 
-class Hbc::Artifact::Symlinked < Hbc::Artifact::Linked
+class Hbc::Artifact::Symlinked < Hbc::Artifact::Relocated
   def self.islink?(path)
     path.symlink?
   end
@@ -9,6 +9,46 @@ def self.link_type_english_name
     "Symlink"
   end
 
+  def summary
+    {
+      english_description: "#{self.class.artifact_english_name} #{self.class.link_type_english_name}s managed by brew-cask:",
+      contents:            @cask.artifacts[self.class.artifact_dsl_key].map(&method(:summarize_one_link)) - [nil],
+    }
+  end
+
+  def link(artifact_spec)
+    load_specification artifact_spec
+    return unless preflight_checks(source, target)
+    ohai "#{self.class.link_type_english_name}ing #{self.class.artifact_english_name} '#{source.basename}' to '#{target}'"
+    create_filesystem_link(source, target)
+  end
+
+  def unlink(artifact_spec)
+    load_specification artifact_spec
+    return unless self.class.islink?(target)
+    ohai "Removing #{self.class.artifact_english_name} #{self.class.link_type_english_name.downcase}: '#{target}'"
+    target.delete
+  end
+
+  def install_phase
+    @cask.artifacts[self.class.artifact_dsl_key].each { |artifact| link(artifact) }
+  end
+
+  def uninstall_phase
+    @cask.artifacts[self.class.artifact_dsl_key].each { |artifact| unlink(artifact) }
+  end
+
+  def preflight_checks(source, target)
+    if target.exist? && !self.class.islink?(target)
+      ohai "It seems there is already #{self.class.artifact_english_article} #{self.class.artifact_english_name} at '#{target}'; not linking."
+      return false
+    end
+    unless source.exist?
+      raise Hbc::CaskError, "It seems the #{self.class.link_type_english_name.downcase} source is not there: '#{source}'"
+    end
+    true
+  end
+
   def create_filesystem_link(source, target)
     Pathname.new(target).dirname.mkpath
     @command.run!("/bin/ln", args: ["-hfs", "--", source, target])