Align TextMate Command.rb

#!/usr/bin/env ruby

require ENV['TM_SUPPORT_PATH'] + '/lib/ui'

lines = STDIN.readlines()
selected_text = ENV.member?("TM_SELECTED_TEXT")

block_top    = 1
block_bottom = lines.length

orig_search_term = TextMate::UI.request_string(:title => "Alignment term", :prompt => "Please enter the word to align by.")
if !orig_search_term.nil?
  orig_search_term.strip!

  if !orig_search_term.empty?
    search_term = orig_search_term.gsub('{', '\{').gsub('}', '\}')
    search_regex = Regexp.new('\s*' + search_term)

    match_indices = []
    block_top.upto(block_bottom) do |number|
      line = lines[number - 1]
      match_index = line =~ search_regex
      match_indices << match_index if match_index
    end
    max_match = match_indices.max

    block_top.upto(block_bottom) do |number|
      match_index = lines[number - 1] =~ search_regex
      if match_index then
        lines[number - 1] = $` + ' '*((max_match-match_index)+1) + orig_search_term + $'
      end
    end

    lines.each do |line|
      puts line
    end
  end
end

Collapse TextMate Command.rb

#!/usr/bin/env ruby

lines = STDIN.readlines()

search_regex = /^\s+/

lines.each do |line|
  line =~ search_regex
  # $` and $' hold the text in the subject string to the left and to the right of the regex match.
  # $& is the match, which here will be the indentation
  puts $& + $'.gsub(/\s+/, ' ').gsub(/\s([,;)\]])/, '\1')
end