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#!/usr/bin/env ruby
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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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#
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# Check the commit history of a module or tree of modules.
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# and sort by number of commits.
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#
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# Usage: tools/module_commits.rb [module dir | module fname]
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#
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require 'find'
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class GitLogLine < Struct.new(:date, :hash, :author, :message)
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end
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class CommitHistory < Struct.new(:fname, :total, :authors)
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end
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msfbase = __FILE__
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while File.symlink?(msfbase)
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  msfbase = File.expand_path(File.readlink(msfbase), File.dirname(msfbase))
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end
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dir = ARGV[0] || File.join(msfbase, "modules", "exploits")
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raise ArgumentError, "Need a filename or directory" unless (dir and File.readable? dir)
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def check_commit_history(fname)
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  git_cmd = `git log --pretty=format:"%ad %h '%aN' %f" --date=short --date-order #{fname}`
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  commit_history = []
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  commits_by_author = {}
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  git_cmd.each_line do |line|
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    parsed_line = line.match(/^([^\s+]+)\s(.{7,})\s'(.*)'\s(.*)[\r\n]*$/)
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    commit_history << GitLogLine.new(*parsed_line[1,4])
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  end
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  commit_history.each do |logline|
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    commits_by_author[logline.author] ||= []
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    commits_by_author[logline.author] << logline.message
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  end
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  puts "Commits for #{fname} #{commit_history.size}"
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  puts "-" * 72
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  commits_by_author.sort_by {|k,v| v.size}.reverse.each do |k,v|
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    puts "%-25s %3d" % [k,v.size]
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  end
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 this_module = CommitHistory.new(fname,commit_history.size,commits_by_author)
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 return this_module
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end
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@module_stats = []
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Find.find(dir) do |fname|
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  next unless fname =~ /rb$/
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  @module_stats << check_commit_history(fname)
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end
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puts "=" * 72
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puts "Sorted modules by commit counts"
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@module_stats.sort_by {|m| m.total }.reverse.each do |m|
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  puts "%-60s %d" % [m.fname, m.total]
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end
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