VisibilityChecker exposes a single method, visibility_changes, for returning an array with places where any ancestor of the given class/module has changed the visibility of any of the methods classes/modules methods.

gem install visibility_checker

Source code is available on GitHub at github.com/jeremyevans/visibility_checker

Here’s an example showing normal use:

require 'visibility_checker'

class C
  def a
  end
end

VisibilityChecker.visibility_changes(C)
# => []

module M
  def a
  end
end
C.include M

VisibilityChecker.visibility_changes(C)
# => []

class C
  private :a
end

VisibilityChecker.visibility_changes(C)
#  => [#<struct VisibilityChecker::VisibilityChange
#        method=:a, defined_in=M, original_visibility=:public,
#        overridden_by=C, new_visibility=:private>]

You can also extend classes or modules with VisibilityChecker and call visibility_changes on them:

C.extend VisibilityChecker
C.visibility_changes
# => [#<struct VisibilityChecker::VisibilityChange ... >]

Or if you want to add the visibility_changes method to all classes and modules, have Module include it:

Module.include VisibilityChecker
M.visibility_changes
# => []

VisibilityChecker.visibility_changes accepts two keyword arguments:

stop_at

The ancestor at which to stop for visibility changes, Object by default.

skip_owners

Skip reporting a visibility change if the method that was overridden was defined in this module/class. Set to Kernel by default as general Ruby practice is that Kernel methods can be overridden (e.g. Enumerable#select).

• Sequel

• Roda

• Rodauth

MIT

Jeremy Evans <code@jeremyevans.net>