Show: use covered to find unused views

[zealot128]

With eager-loading it is easy to find unused classes, but views might be hard to tell if unused.

So, after digging into the .covered.db Persistor, I found, it is relatively easy, to check which views are unused:

#!/usr/bin/env ruby

# put in bin/unused-views 
# add chmod +x 
# run COVERAGE=Summary before

require 'covered'
infos = Covered::Persist.allocate.make_unpacker(File.open(".covered.db")).each.map { |r| r }
by_name = infos.group_by { |i| i[:path] }.transform_values { |i| i.last[:coverage] }
executed_views = by_name.filter { |k, v| k['app/views'] }.keys.sort

all = Dir['app/views/**/*'].select { |f| File.file?(f) }

unused_views = all - executed_views

if unused_views.any?
  # wrap in red:
  puts "\e[31m Unused views: \e[0m"
  puts unused_views.sort
  exit 1
else
  puts "All views are used!"
end

[ioquatix]

That's awesome, maybe we should make a better interface for loading the persisted database.

[ioquatix]

I reviewed your code and my code, and I think this can make your implementation better:

output = Covered::Files.new
persist = Covered::Persist.new(output)
persist.each do |coverage|
  # coverage is an instance of https://github.com/ioquatix/covered/blob/main/lib/covered/coverage.rb#L78
  coverage.path # The path
end