lib/gemfile_arranger/traverse/sort_priority_gems_in_group.rb
module GemfileArranger
module Traverse
class SortPriorityGemsInGroup < Parser::AST::Processor
def initialize(keys)
@keys = Array(keys).dup.map(&:to_s)
end
def on_block(node)
sorted_block = sort_gems_in_group_with_keys(node, @keys)
node.updated(:block, sorted_block) if node != sorted_block
end
def sort_gems_in_group_with_keys(node, keys)
send_node, args_node, body_node = node.children
return node if send_node.children[1] != :group
return node if body_node.type != :begin
gems = body_node.children.sort_by.with_index do |child, i|
gem_name = child.children[2].children[0]
key_index = keys.index(gem_name) || keys.length
[key_index, i]
end
return node if body_node.children == gems
sorted_body_node = body_node.updated(:begin, gems)
[send_node, args_node, sorted_body_node]
end
end
end
end