ruby 重新实现的unix树

Posted 2021-05-16

#!/usr/bin/env ruby

def tree entry=Dir.pwd, indent=0
  entries = Dir.entries(entry)[2..-1]
  entries.each do |item|

    printable_item = entries.last != item ? 
      "├── #{File.basename(item)}" :
      "└── #{File.basename(item)}"

    puts "#{'│   ' * indent}#{printable_item}"
    tree("#{entry}/#{item}", indent + 1) if File.directory?("#{entry}/#{item}")
  end
end

ARGV.empty? ? tree : tree(ARGV.first)

#!/usr/bin/env ruby

# without the glyphs, if you prefer
def list entry=Dir.pwd
  Dir.entries(entry)[2..-1].each do |item|
    puts File.basename(item)
    list("#{entry}/#{item}") if File.directory?("#{entry}/#{item}")
  end
end

ARGV.empty? ? list : list(ARGV.first)