Fix installing a local bottle from source

Factor Utils::Bottles.formula_contents out of BottleLoader.

1 files changed, 9 insertions, 0 deletions

diff --git a/Library/Homebrew/utils/bottles.rb b/Library/Homebrew/utils/bottles.rb
index 73353496a..66b5fb640 100644
--- a/Library/Homebrew/utils/bottles.rb
+++ b/Library/Homebrew/utils/bottles.rb
@@ -54,6 +54,15 @@ module Utils
       def resolve_version(bottle_file)
         PkgVersion.parse receipt_path(bottle_file).split("/")[1]
       end
+
+      def formula_contents(bottle_file,
+          name: resolve_formula_names(bottle_file)[0])
+        bottle_version = resolve_version bottle_file
+        formula_path = "#{name}/#{bottle_version}/.brew/#{name}.rb"
+        contents = Utils.popen_read "tar", "-xOzf", bottle_file, formula_path
+        raise BottleFormulaUnavailableError.new(bottle_file, formula_path) unless $CHILD_STATUS.success?
+        contents
+      end
     end
 
     class Bintray