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Rubocop pre-commit hook
#!/usr/bin/env ruby
ADDED_OR_MODIFIED = /^\s*(A|AM|M)/.freeze
changed_files = `git status --porcelain`.split(/\n/)
unstaged_files = `git ls-files -m`.split(/\n/)
changed_files = { |f| f =~ ADDED_OR_MODIFIED }
changed_files = { |f| f.split(" ")[1] }
changed_files -= (unstaged_files - changed_files)
changed_files = { |file_name| File.extname(file_name) == ".rb" }
changed_files = changed_files.join(" ")
exit(0) if changed_files.empty?
success = system(%(
rubocop #{changed_files}
if success == false
puts "Would you like to continue press 'any key' or 'n/N' to halt? "
exit(1) if %w(N n).include?(gets.chomp)
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