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# frozen_string_literal: true
module RuboCop
module Cop
# Cop that blacklists the injecting of EE specific modules anywhere but on
# the last line of a file. Injecting a module in the middle of a file will
# cause merge conflicts, while placing it on the last line will not.
class InjectEnterpriseEditionModule < RuboCop::Cop::Cop
MSG = 'Injecting EE modules must be done on the last line of this file' \
', outside of any class or module definitions'
METHODS = Set.new(%i[include extend prepend]).freeze
def ee_const?(node)
line = node.location.expression.source_line
# We use `match?` here instead of RuboCop's AST matching, as this makes
# it far easier to handle nested constants such as `EE::Foo::Bar::Baz`.
line.match?(/(\s|\()(::)?EE::/)
end
def on_send(node)
return unless METHODS.include?(node.children[1])
return unless ee_const?(node.children[2])
line = node.location.line
buffer = node.location.expression.source_buffer
last_line = buffer.last_line
# Parser treats the final newline (if present) as a separate line,
# meaning that a simple `line < last_line` would yield true even though
# the expression is the last line _of code_.
last_line -= 1 if buffer.source.end_with?("\n")
add_offense(node) if line < last_line
end
# Automatically correcting these offenses is not always possible, as
# sometimes code needs to be refactored to make this work. As such, we
# only allow developers to easily blacklist existing offenses.
def autocorrect(node)
lambda do |corrector|
corrector.insert_after(
node.source_range,
" # rubocop: disable #{cop_name}"
)
end
end
end
end
end
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