Altered gist.rb to take the filename on the command line

gist.rb

#!/usr/bin/env ruby

=begin

INSTALL:

  curl http://github.com/defunkt/gist/raw/master/gist.rb > gist &&
  chmod 755 gist &&
  sudo mv gist /usr/local/bin/gist

USE:

  gist < file.txt
  echo secret | gist -p # or --private
  gist 1234 > something.txt

=end

require 'open-uri'
require 'net/http'

module Gist
  extend self

  @@gist_url = 'http://gist.github.com/%s.txt'

  def read(gist_id)
    return help if gist_id == '-h' || gist_id == '--help' || gist_id.nil? || gist_id[/help/]
    if gist_id.respond_to?( :read ) then
      gist_id.read
    else
      open(@@gist_url % gist_id).read
    end
  end

  def write(content, fname, private_gist)
    name = nil
    ext = nil
    if fname then
      name = File.basename( fname )
      ext = File.extname( fname )
    end
    url = URI.parse('http://gist.github.com/gists')
    req = Net::HTTP.post_form(url, data(name, ext, content, private_gist))
    created = copy( req['Location'] )
    content
  end

  def help
    "USE:\n  " + File.read(__FILE__).match(/USE:(.+?)=end/m)[1].strip
  end

private
  def copy(content)
    case RUBY_PLATFORM
    when /darwin/
      return content if `which pbcopy`.strip == ''
      IO.popen('pbcopy', 'r+') { |clip| clip.print content.strip }
    when /linux/
      return content if `which xclip`.strip == ''
      IO.popen('xclip', 'r+') { |clip| clip.print content.strip }
    end

    content
  end

  def data(name, ext, content, private_gist)
    return {
      'file_ext[gistfile1]'      => ext,
      'file_name[gistfile1]'     => name,
      'file_contents[gistfile1]' => content
    }.merge(private_gist ? { 'private' => 'on' } : {}).merge(auth)
  end

  def auth
    user  = `git config --global github.user`.strip
    token = `git config --global github.token`.strip

    user.empty? ? {} : { :login => user, :token => token }
  end
end

if $stdin.tty?
  puts Gist.read( ARGV.shift )
else
  pflag = ARGV.shift
  fname = nil
  if %w[ -p --private].include?( pflag ) then
    pflag = true
  else
    fname = pflag
    pflag = false
  end
  fname = fname || ARGV.shift

  puts Gist.write($stdin.read, fname, pflag )

end