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#!/usr/bin/env ruby
# frozen_string_literal: true
# Emit AST from parsed Ruby code by RuboCop.
#
# This is an alternative to `ruby-parser` shipped with `parser` gem.
#
# Usage:
# rubocop-parse -e 'puts "hello"'
# (send nil :puts
# (str "hello"))
#
# rubocop-parse -e 'puts "hello"' -v 3.0
# (send nil :puts
# (str "hello"))
#
# rubocop-parse app/models/project.rb
# (begin
# (send nil :require
# (str "carrierwave/orm/activerecord"))
# (class
# (const nil :Project)
# (const nil :ApplicationRecord)
# (begin
# (send nil :include
# ...
require_relative '../config/bundler_setup'
require 'rubocop'
require 'optparse'
def print_ast(file, source, version)
version ||= RuboCop::ConfigStore.new.for_file(file).target_ruby_version
puts RuboCop::AST::ProcessedSource.new(source, version).ast.to_s
end
options = Struct.new(:eval, :ruby_version, :print_help, keyword_init: true).new
parser = OptionParser.new do |opts|
opts.banner = "Usage: #{$0} [-e code] [FILE...]"
opts.on('-e FRAGMENT', '--eval FRAGMENT', 'Process a fragment of Ruby code') do |code|
options.eval = code
end
opts.on('-v RUBY_VERSION', '--ruby-version RUBY_VERSION',
'Parse as Ruby would. Defaults to RuboCop TargetRubyVersion setting.') do |ruby_version|
options.ruby_version = Float(ruby_version)
end
opts.on('-h', '--help') do
options.print_help = true
end
end
args = parser.parse!
if options.print_help
puts parser
exit
end
print_ast('', options.eval, options.ruby_version) if options.eval
args.each do |arg|
if File.file?(arg)
source = File.read(arg)
print_ast(arg, source, options.ruby_version)
else
warn "Skipping non-file #{arg.inspect}"
end
end
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