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[Fix #3936] Add new Style/MixinGrouping
cop
#3982
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,101 @@ | ||
# frozen_string_literal: true | ||
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module RuboCop | ||
module Cop | ||
module Style | ||
# This cop checks for grouping of mixins in `class` and `module` bodies. | ||
# By default it enforces mixins to be placed in separate declarations, | ||
# but it can be configured to enforce grouping them in one declaration. | ||
# | ||
# @example | ||
# | ||
# EnforcedStyle: separated (default) | ||
# | ||
# @bad | ||
# class Foo | ||
# include Bar, Qox | ||
# end | ||
# | ||
# @good | ||
# class Foo | ||
# include Bar | ||
# include Qox | ||
# end | ||
# | ||
# EnforcedStyle: grouped | ||
# | ||
# @bad | ||
# class Foo | ||
# extend Bar | ||
# extend Qox | ||
# end | ||
# | ||
# @good | ||
# class Foo | ||
# extend Bar, Qox | ||
# end | ||
class MixinGrouping < Cop | ||
include ConfigurableEnforcedStyle | ||
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MIXIN_METHODS = [:extend, :include, :prepend].freeze | ||
MSG = 'Put `%s` mixins in %s.'.freeze | ||
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def on_send(node) | ||
_reciever, method_name, *_args = *node | ||
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return unless MIXIN_METHODS.include?(method_name) | ||
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check(node) | ||
end | ||
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private | ||
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def check(send_node) | ||
if separated_style? | ||
check_separated_style(send_node) | ||
else | ||
check_grouped_style(send_node) | ||
end | ||
end | ||
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def check_grouped_style(send_node) | ||
return unless sibling_mixins?(send_node) | ||
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add_offense(send_node, :expression) | ||
end | ||
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def check_separated_style(send_node) | ||
_reciever, _method_name, *args = *send_node | ||
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return if args.one? | ||
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add_offense(send_node, :expression) | ||
end | ||
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def sibling_mixins?(send_node) | ||
siblings = send_node.parent.each_child_node(:send) | ||
.reject { |sibling| sibling == send_node } | ||
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siblings.any? do |sibling_node| | ||
sibling_node.method_name == send_node.method_name | ||
end | ||
end | ||
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def message(send_node) | ||
suffix = | ||
separated_style? ? 'separate statements' : 'a single statement' | ||
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format(MSG, send_node.method_name, suffix) | ||
end | ||
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def grouped_style? | ||
style == :grouped | ||
end | ||
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def separated_style? | ||
style == :separated | ||
end | ||
end | ||
end | ||
end | ||
end |
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Original file line number | Diff line number | Diff line change |
---|---|---|
|
@@ -2765,6 +2765,54 @@ EnforcedStyle | both | |
SupportedStyles | if, case, both | ||
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## Style/MixinGrouping | ||
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Enabled by default | Supports autocorrection | ||
--- | --- | ||
Enabled | No | ||
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This cop checks for grouping of mixins in `class` and `module` bodies. | ||
By default it enforces mixins to be placed in separate declarations, | ||
but it can be configured to enforce grouping them in one declaration. | ||
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### Example | ||
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```ruby | ||
EnforcedStyle: separated (default) | ||
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# bad | ||
class Foo | ||
include Bar, Qox | ||
end | ||
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# good | ||
class Foo | ||
include Bar | ||
include Qox | ||
end | ||
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EnforcedStyle: grouped | ||
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# bad | ||
class Foo | ||
extend Bar | ||
extend Qox | ||
end | ||
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# good | ||
class Foo | ||
extend Bar, Qox | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. include Bar
include Qox == include Qox, Bar |
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end | ||
``` | ||
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### Important attributes | ||
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Attribute | Value | ||
--- | --- | ||
EnforcedStyle | separated | ||
SupportedStyles | separated, grouped | ||
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## Style/ModuleFunction | ||
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Enabled by default | Supports autocorrection | ||
|
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==