smarter ls for a directory of text files

notes.rb

#!/usr/bin/ruby
require 'smart_colored/extend'

filter = nil 

def usage
  puts "usage: 'notes [filter]'"
end

# add some more command line options like -d for different directory
def parse_arguments
  if ARGV.length > 1 
    usage
    exit
  end 
  if ARGV.length == 1
    filter = ARGV[0]
  end 
end

def parse_directory
  file_names = Dir.entries(".")
  file_data = []
  directories = []

  # fix this to check if a directory
  for name in file_names
    if not name =~ /.txt/
      next if name == "." or name == ".."
      puts (name + "/").yellow
      next
    end
    head = File.open("./"+name).first
    if head == nil
      head = "<empty>"
    end
    head = head.gsub("\n",'')[0,70]
    line = File.mtime("./"+name).strftime("%d/%m").red+
      " "+name.bold+" - "+head

    file_data.push([File.mtime("./"+name),line])
  end

  file_data.sort! { |a,b| a[0] <=> b[0] }

  for file in file_data
    puts file[1]
  end
end

parse_arguments
parse_directory