floss-reflect

#!/usr/bin/env ruby
#
# Usage: floss-reflect HISTORY_FILE
#
# Updates all files in the project that mention the *second* version NUMBER
# and DATE in the HISTORY_FILE to match the *first* version NUMBER and DATE:
#
#   $ cat HISTORY_FILE
#   ... optional content ...
#   ## Version NUMBER (DATE)
#   ... optional content ...
#   ## Version NUMBER (DATE)
#   ... optional content ...
#
# Written in 2012 by Suraj N. Kurapati <https://github.com/sunaku>

HISTORY_FILE = ARGV.shift or raise ArgumentError, 'HISTORY_FILE not given'

(new_version, new_date), (old_version, old_date) =
  File.read(HISTORY_FILE, encoding: 'utf-8').
  scan(/^## Version (\S+) \((\S+?)\)/).first(2)

`git grep -I -l -E "#{old_version}|#{old_date}"`.each_line do |file|
  puts file.chomp!
  next if file == HISTORY_FILE
  body = File.read(file)
  body.gsub! /\b#{old_version}\b/, new_version
  body.gsub! /\b#{old_date}\b/, new_date
  File.write file, body
end