Move legacy cache and caskroom code to `compat/*`.

3 files changed, 50 insertions, 0 deletions

diff --git a/Library/Homebrew/compat/hbc.rb b/Library/Homebrew/compat/hbc.rb
index 179639953..e60bdbc07 100644
--- a/Library/Homebrew/compat/hbc.rb
+++ b/Library/Homebrew/compat/hbc.rb
@@ -1,2 +1,19 @@
 require "compat/hbc/cask_loader"
 require "compat/hbc/cli/update"
+require "compat/hbc/cache"
+require "compat/hbc/caskroom"
+
+module Hbc
+  class << self
+    prepend(
+      Module.new do
+        def init
+          Cache.delete_legacy_cache
+          Caskroom.migrate_caskroom_from_repo_to_prefix
+
+          super
+        end
+      end,
+    )
+  end
+end
diff --git a/Library/Homebrew/compat/hbc/cache.rb b/Library/Homebrew/compat/hbc/cache.rb
new file mode 100644
index 000000000..34221fcf1
--- /dev/null
+++ b/Library/Homebrew/compat/hbc/cache.rb
@@ -0,0 +1,13 @@
+module Hbc
+  module Cache
+    module_function
+
+    def delete_legacy_cache
+      legacy_cache = HOMEBREW_CACHE.join("Casks")
+      return unless legacy_cache.exist?
+
+      ohai "Deleting legacy cache at #{legacy_cache}"
+      FileUtils.remove_entry_secure(legacy_cache)
+    end
+  end
+end
diff --git a/Library/Homebrew/compat/hbc/caskroom.rb b/Library/Homebrew/compat/hbc/caskroom.rb
new file mode 100644
index 000000000..489c5b224
--- /dev/null
+++ b/Library/Homebrew/compat/hbc/caskroom.rb
@@ -0,0 +1,20 @@
+module Hbc
+  module Caskroom
+    module_function
+
+    def migrate_caskroom_from_repo_to_prefix
+      repo_caskroom = HOMEBREW_REPOSITORY.join("Caskroom")
+      return if Hbc.caskroom.exist?
+      return unless repo_caskroom.directory?
+
+      ohai "Moving Caskroom from HOMEBREW_REPOSITORY to HOMEBREW_PREFIX"
+
+      if Hbc.caskroom.parent.writable?
+        FileUtils.mv repo_caskroom, Hbc.caskroom
+      else
+        opoo "#{Hbc.caskroom.parent} is not writable, sudo is needed to move the Caskroom."
+        SystemCommand.run("/bin/mv", args: [repo_caskroom, Hbc.caskroom.parent], sudo: true)
+      end
+    end
+  end
+end