.bashrc

if [ -x ~/.bash_completion.d/_transcript ]; then
  complete -C ~/.bash_completion.d/_transcript -o default transcript
fi

_transcript

#!/usr/bin/env ruby

# Save this somewhere, chmod 755 it, then add
#   complete -C path/to/this/script -o default transcript
# to your ~/.bashrc

exit 0 unless /^transcript\b/ =~ ENV["COMP_LINE"]

TRANSCRIPTS_DIR = File.expand_path("~/Library/Application\ Support/Adium\ 2.0/Users/Default/Logs")

puts Dir[TRANSCRIPTS_DIR + "/*/#{$'.strip}*"].map {|buddy| File.basename(buddy) }.uniq

exit 0

transcript

#!/usr/bin/env ruby

require "nokogiri"
require "pathname"
require "time"

module Purple
  TRANSCRIPTS_DIR = Pathname("~/Library/Application\ Support/Adium\ 2.0/Users/Default/Logs").expand_path

  class Transcript
    def self.all_files(buddy_name)
      Dir.glob(TRANSCRIPTS_DIR.join("*/#{buddy_name}/**/*")).sort_by {|file| File.basename(file) }.select {|file| File.file?(file) }
    end

    def self.nth_last_file(buddy_name, which=-1)
      all_files(buddy_name)[which]
    end

    def initialize(transcript)
      @messages = Nokogiri(transcript).search("message")
    end

    def pretty_print(out=STDOUT)
      @messages.each do |message|
        out.print timestamp(message), " "
        out.print nickname(message), " "
        out.puts  message.inner_text
      end
    end

    def max_nickname_size
      @max_nickname_size ||= @messages.map {|m| (m["alias"] || m["sender"]).size }.max
    end

    def nickname(message)
      "<#{message["alias"] || message["sender"]}>".rjust(max_nickname_size + 2)
    end

    def timestamp(message)
      "[" + Time.parse(message["time"]).strftime("%H:%M:%S") + "]"
    end
  end
end

if $0 == __FILE__
  banner =<<-END_HELP
Usage: #{File.basename($0)} <buddy_name>

Display a nicely formatted Adium chat transcript to STDOUT. For example:

#{File.basename($0)} [email protected]
#{File.basename($0)} [email protected]
#{File.basename($0)} clever_aim_handle

This will get the latest (or currently active) chat transcript for the selected
buddy.
END_HELP

  abort banner if ARGV.empty?

  if ARGV[0] =~ /-\d+/
    n = ARGV[0].to_i
    buddy = ARGV[1]
  else
    n = -1
    buddy = ARGV[0]
  end

  file = Purple::Transcript.nth_last_file(buddy, n)
  abort "#{buddy} has no transcripts\n\n#{banner}" unless file && File.file?(file)

  Purple::Transcript.new(File.read(file)).pretty_print
end