git-dirblame.rb

#!/usr/bin/env ruby

pwd = `pwd`.strip
targets = if ARGV.empty?
            Dir["#{pwd}/*"]
          else
            ARGV.map do |arg|
              Dir["#{arg.strip.gsub(/\/*$/,'')}/*"]
            end.flatten.uniq
          end

targets.each do |target|
  target.gsub!(/#{pwd}/, '.')
  last_commit = `git log -- #{target}`
  longest_line_length = last_commit.lines.map(&:length).max || 60
  max_length = longest_line_length > 60 ? longest_line_length : 60
  header = [
    ".#{'-' * (max_length - 2)}.",
    "| #{target.ljust(max_length - 3)}|",
    "|#{'-' * (max_length - 2)}|"
  ]
  footer = ["`#{'-' * (max_length - 2)}x"].join("\n")
  formatted = last_commit.lines.map do |line|
    "| #{line.strip.ljust(max_length - 4)} |"
  end
  puts header, formatted, footer
end