Renames already pushed git tags to follow a folder structure staging/<version> or master/<version>.

rename_git_tags.rb

#!/usr/bin/env ruby
#
# renames git tags
# 3.7.0.31-staging -> staging/3.7.0.31
# 3.7.0 -> master/3.7.0
#
# see http://blog.sidmitra.com/how-to-rename-a-tag-already-pushed-to-a-remot
# 
# make sure that other repo users call 
# pull --prune --tags
# on their checked out repository
#

def rename_tag(old, new)
  puts "rename_tag: #{old} -> #{new}"
  `git tag #{new} #{old} && git push --tags && git push origin :refs/tags/#{old} && git tag -d #{old}`
end

`git tag -l`.each_line do |tag|
  oldTag = tag.chomp
  newTag = oldTag.gsub(/\-.*?$/, "")
  if oldTag =~ /^\d+\.\d+\.\d+\.\d+-staging$/ then
    rename_tag(oldTag, "staging/#{newTag}")
  elsif oldTag =~ /^\d+\.\d+\.\d+$/
    rename_tag(oldTag, "master/#{newTag}")
  else
    puts tag
  end
end