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internal methods
In #33325, `deprecate_methods` is replaced from `prepend` to completely
emurated `alias_method_chain`, it exposed two internal methods
`xxx_with_deprecation` and `xxx_without_deprecation`.
After that, #34648 restored the `prepend` implementation, which doesn't
expose any internal methods, so we no longer be able to ensure to always
expose that internal methods.
As I said at https://github.com/rails/rails/pull/33325#issuecomment-409016725,
I think that internal methods exposed is not a specification but a
limitation when using `alias_method_chain`, there is no longer a reason
to follow that limitation.
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since Ruby 2.5
https://bugs.ruby-lang.org/issues/14133
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Before #33325, `deprecate` works for non-exist methods.
This is necessary, for example, if want to deprecate dynamically defined
methods like attributes methods.
Fixes #34646
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"active_support/core_ext/module/aliasing" is no longer used since
#19434.
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- Refactoring alias_chain to Module#prepend broke the possibility to deprecate class methods since the module
generated was prepended to the target's instance.
A suggestion to fix this was to use `AS#redefine_method` which would solve the
problem but with the cost of redefining directly the method.
Decided to go with the same alias_chain implementation as before instead.
- Fixes #33253
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This commit fixes `deprecate` so that it preserves method visibility (like it
did previously when it was utilizing `alias_method_chain`).
When Module#prepend replaced alias_method_chain in a982a42 it caused deprecated
methods to always become public.
`alias_method_chain` had this bit of code:
https://github.com/rails/rails/blob/v5.0.6/activesupport/lib/active_support/core_ext/module/aliasing.rb#L40-L47
which preserved method visibility.
Without this fix, a workaround would be:
```ruby
class C8
private
def new_method
end
def old_method
end
deprecate :old_method, :new_method
# workaround:
instance_method(:old_method).owner.send(:private, :old_method)
end
```
Because the visibility needs to be fixed on the Module prepended by
MethodWrapper.
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Seems like version with class methods doesn't work.
```ruby
require "active_support/deprecation.rb"
module Fred
extend self
def aaa; end
def bbb; end
def ccc; end
def ddd; end
def eee; end
end
ActiveSupport::Deprecation.deprecate_methods(Fred, :aaa, bbb: :zzz, ccc: 'use Bar#ccc instead')
Fred.aaa
Fred.bbb
Fred.ccc
```
# produces nothing
vs
```ruby
require "active_support/deprecation.rb"
class Fred
def aaa; end
def bbb; end
def ccc; end
def ddd; end
def eee; end
end
ActiveSupport::Deprecation.deprecate_methods(Fred, :aaa, bbb: :zzz, ccc: 'use Bar#ccc instead')
Fred.new.aaa
Fred.new.bbb
Fred.new.ccc
```
produces
```
DEPRECATION WARNING: aaa is deprecated and will be removed from Rails 5.2 (called from <main> at deprications.rb:15)
DEPRECATION WARNING: bbb is deprecated and will be removed from Rails 5.2 (use zzz instead) (called from <main> at deprications.rb:16)
DEPRECATION WARNING: ccc is deprecated and will be removed from Rails 5.2 (use Bar#ccc instead) (called from <main> at deprications.rb:17)
```
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This basically reverts 8da30ad6be34339124ba4cb4e36aea260dda12bc
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The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.
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Add tests for ActiveSupport::Deprecation.deprecate_methods
Modify ActiveSupport::Testing::Deprecation to allow a custom deprecator
Leverage ActiveSupport::Testing::Deprecation assert_deprecated
Update documentation for ActiveSupport::Deprecation.deprecate_methods
Use cases:
Using the default deprecator => "removed from Rails X.Y"
Passing a custom deprecator in the options hash => "removed from MyGem next-release"
Deprecating methods directly from custom deprecator => "removed from MyGem next-release"
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I could not find any reason why each method got its own prepended
module here, and all tests appear to pass with my change.
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…as discussed #19413
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ActiveSupport::Deprecation is now a class rather than a module. You can
get instance of ActiveSupport::Deprecation calling #instance method.
ActiveSupport::Deprecation.instance
But when you need to get new object od ActiveSupport::Deprecation you
need to just call #new.
@instance = ActiveSupport::Deprecation.new
Since you can create a new object, you can change the version and the
name of the library where the deprecator concerned.
ActiveSupport::Deprecation.new('2.0', 'MyGem')
If you need use another deprecator instance you can select it in the
options of deprecate method.
deprecate :method, :deprecator => deprecator_instance
Documentation has been updated.
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extend/include it also.
test local deprecation
deprecator object
Test ActiveSupport::Deprecation when included
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Signed-off-by: José Valim <jose.valim@gmail.com>
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Conflicts:
activesupport/CHANGELOG
activesupport/lib/active_support/core_ext/class/delegating_attributes.rb
activesupport/lib/active_support/core_ext/hash/conversions.rb
activesupport/lib/active_support/core_ext/module/attribute_accessors.rb
activesupport/lib/active_support/core_ext/string/multibyte.rb
activesupport/lib/active_support/core_ext/time/calculations.rb
activesupport/lib/active_support/deprecation.rb
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