bin/git-rank-contributors

   1 #!/usr/bin/env ruby
   2
   3 ## git-rank-contributors: a simple script to trace through the logs and
   4 ## rank contributors by the total size of the diffs they're responsible for.
   5 ## A change counts twice as much as a plain addition or deletion.
   6 ##
   7 ## Output may or may not be suitable for inclusion in a CREDITS file.
   8 ## Probably not without some editing, because people often commit from more
   9 ## than one address.
  10 ##
  11 ## git-rank-contributors Copyright 2008 William Morgan <wmorgan-git-wt-add@masanjin.net>.
  12 ## This program is free software: you can redistribute it and/or modify
  13 ## it under the terms of the GNU General Public License as published by
  14 ## the Free Software Foundation, either version 3 of the License, or (at
  15 ## your option) any later version.
  16 ##
  17 ## This program is distributed in the hope that it will be useful,
  18 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ## GNU General Public License for more details.
  21 ##
  22 ## You can find the GNU General Public License at:
  23 ##   http://www.gnu.org/licenses/
  24
  25 class String
  26   def obfuscate; gsub(/@/, " at the ").gsub(/\.(\w+)(>|$)/, ' dot \1s\2') end
  27 end
  28
  29 lines = {}
  30 verbose = ARGV.delete("-v")
  31 obfuscate = ARGV.delete("-o")
  32
  33 author = nil
  34 state = :pre_author
  35 `git log -p --no-color`.each do |l|
  36   case
  37   when (state == :pre_author || state == :post_author) && l =~ /Author: (.*)$/
  38     author = $1
  39     state = :post_author
  40     lines[author] ||= 0
  41   when state == :post_author && l =~ /^\+\+\+/
  42     state = :in_diff
  43   when state == :in_diff && l =~ /^[\+\-]/
  44     lines[author] += 1
  45   when state == :in_diff && l =~ /^commit /
  46     state = :pre_author
  47   end
  48 end
  49
  50 lines.sort_by { |a, c| -c }.each do |a, c|
  51   a = a.obfuscate if obfuscate
  52   if verbose
  53     puts "#{a}: #{c} lines of diff"
  54   else
  55     puts a
  56   end
  57 end