nn

#!/usr/bin/env ruby -w

# nn: normalize names.

# A quasi-generic file renamer. Splits the provided file names along the most
# commonly-used separators, capitalizes each word, and assembles the result back
# before renaming the files. It also uses the Xcode SetFile command to hide the
# extensions.

require 'optparse'

def parse_args
  options = {}

  op = OptionParser.new do |opts|
    opts.banner = "Usage: #{opts.program_name} [option] filename [filename...]"

    opts.on("-d", "--dry", "Report what would be done; don't actually do it.") do
      options[:dry] = true
    end
  end

  args = op.parse!

  [args, options]
end

# ------------------


args, options = parse_args

splitter = /[-_ \.]/
pairs = []

args.each do |name|
  unless File.directory?(name)
    original = File.basename(name)

    dirname = File.dirname(name)
    extension = File.extname(name)
    basename = File.basename(name, extension)

    newform = basename.split(splitter)
    newform.map! { |e| e.capitalize }

    revised = newform.join(" ") + extension

    Dir.chdir(dirname) do
      unless revised == original
        pairs << [original, revised]
        File.rename(original, revised) unless options[:dry]
      end
      %x(SetFile -a E "#{revised}") unless options[:dry]
    end
  end
end

# Find get the length of the longest name on the left-hand side.
width = pairs.map{ |pair| pair[0].length }.max

if pairs.empty?
  puts "No files to operate on."
else
  pairs.each do |pair|
    printf("%#{width}s => %s\n", pair[0], pair[1])
  end
end