pre-commit

#!/usr/bin/env ruby

# filter by extension
def extname_filter(files, extnames = ['.rb'])
  files.split($/).select do |path|
    extnames.include?(File.extname(path))
  end
end

# grep 'binding.pry' (avoid a comment out)
def include_debug_code?(files)
  extname_filter(files).any? do |path|
    return false unless File.exist? path
    !File.readlines(path).grep(/\A\s*(?!#\s*)binding.pry/).empty?
  end
end

# check binding.pry
cached_files = `git diff --cached --name-only`
if include_debug_code?(cached_files)
  puts 'ERROR: binding.pry is found.'
  exit 1
end