diff options
Diffstat (limited to 'scripts/lint')
-rwxr-xr-x | scripts/lint/unused_helper_methods.rb | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/scripts/lint/unused_helper_methods.rb b/scripts/lint/unused_helper_methods.rb new file mode 100755 index 00000000000..b7b651614ef --- /dev/null +++ b/scripts/lint/unused_helper_methods.rb @@ -0,0 +1,55 @@ +#!/usr/bin/env ruby +# frozen_string_literal: true + +# Inspired in part by https://gist.github.com/kylefox/617b0bead5f53dc53a224a8651328c92 +# + +require 'parallel' + +start = Process.clock_gettime(Process::CLOCK_MONOTONIC) + +# Build an array of filename globs to process. +# Only search file types that might use or define a helper. +# +extensions = %w[rb haml erb].map { |ext| "{ee/,}app/**/*.#{ext}" } + +# Build a hash of all the source files to search. +# Key is filename, value is an array of the lines. +# +source_files = {} + +Dir.glob(extensions).each do |filename| + source_files[filename] = File.readlines(filename) +end + +# Build an array of {method, file} hashes defined in app/helper/* files. +# +helpers = source_files.keys.grep(%r{app/helpers}).flat_map do |filename| + source_files[filename].flat_map do |line| + line =~ /def ([^(\s]+)/ ? [{ method: Regexp.last_match(1).chomp, file: filename }] : [] + end +end + +puts "Scanning #{source_files.size} files for #{helpers.size} helpers..." + +# Combine all the source code into one big string, because regex are fast. +# +source_code = source_files.values.flatten.join + +# Iterate over all the helpers and reject any that appear anywhere in the complete source. +# +unused = Parallel.flat_map(helpers, progress: 'Checking helpers') do |helper| + /(?<!def )#{Regexp.quote(helper[:method].sub(/^self\./, ''))}\W/.match?(source_code) ? [] : helper +end + +finish = Process.clock_gettime(Process::CLOCK_MONOTONIC) + +if unused + puts "\nFound #{unused.size} unused helpers:\n\n" + unused.each { |helper| puts " - [ ] `#{helper[:file]}`: `#{helper[:method]}`" } + puts "\n" +else + puts 'No unused helpers were found.' +end + +puts "Finished in #{finish - start} seconds." |