Delete tags less than a specific version from a git repository, both locally and remotely.

clear_tags.rb

# Tags with version number less than max_tag will be deleted
max_tag = ARGV[0]

if !Gem::Version.correct?(max_tag)
  puts 'Incorect version number'
  exit
end

tags = `git tag`.split(/\s+/).select do |t|
  !Gem::Version::correct?(t) || Gem::Version.new(t) < Gem::Version.new(max_tag)
end

`git tag -d #{tags.join ' '}`
`git push origin #{tags.map { |t| ':' + t }.join ' '}`