cleanup: remove broken symlink for uninstalled migrated Casks

Signed-off-by: Michael Cho <[email protected]>

Library/Homebrew/cleanup.rb

@@ -630,6 +630,20 @@ def prune_prefix_symlinks_and_directories
  end
  end
 
+ require "cask/caskroom"
+ if Cask::Caskroom.path.directory?
+ Cask::Caskroom.path.each_child do |path|
+ path.extend(ObserverPathnameExtension)
+ next if !path.symlink? || path.resolved_path_exists?
+
+ if dry_run?
+ puts "Would remove (broken link): #{path}"
+ else
+ path.unlink
+ end
+ end
+ end
+
  return if dry_run?
 
  return if ObserverPathnameExtension.total.zero?

Library/Homebrew/test/cleanup_spec.rb

@@ -95,6 +95,22 @@
  end
  end
 
+ describe "::prune_prefix_symlinks_and_directories" do
+ it "removes broken symlinks for uninstalled migrated Casks" do
+ caskroom = Cask::Caskroom.path
+ old_cask_dir = caskroom/"old"
+ new_cask_dir = caskroom/"new"
+ unrelated_cask_dir = caskroom/"other"
+ unrelated_cask_dir.mkpath
+ FileUtils.ln_s new_cask_dir, old_cask_dir
+
+ cleanup.prune_prefix_symlinks_and_directories
+ expect(unrelated_cask_dir).to exist
+ expect(old_cask_dir).not_to be_a_symlink
+ expect(old_cask_dir).not_to exist
+ end
+ end
+
  specify "::cleanup_formula" do
  f1 = Class.new(Testball) do
  version "1.0"