Sync an svn repo to git. A simple script that can be run from a cron job.

svn-to-git.rb

require 'Time'                                                                                        
require 'Nokogiri'                                                                                    
                                                                                                      
#                                                                                                     
# svn-to-git                                                                                          
#                                                                                                     
# Sync an svn repo to git.                                                                            
#                                                                                                     
# Checks for svn updates. If there are none, does                                                     
# nothing. Otherwise, commits & pushes the latest                                                     
# changes into git with an appropriate commit message.                                                
#                                                                                                     
                                                                                                      
                                                                                                      
def commit_and_push_to_git_with(log_messages)                                                         
  commit_msg = log_messages.join("\n")                                                                
  system 'git', 'add', '-A'                                                                           
  system 'git', 'commit', '-m', commit_msg                                                            
  system 'git', 'push'                                                                                
end                                                                                                   
                                                                                                      
                                                                                                      
##### Execution starts here #####                                                                     
                                                                                                      
# Get the git cut-off date                                                                            
last_git_commit = Time.parse(`git log -1 --format="%ci"`)                                             
                                                                                                      
# Get new svn log messages                                                                            
messages = []                                                                                         
`svn update`                                                                                          
svn_log = Nokogiri::XML(`svn log --xml`)                                                              
svn_log.xpath('//logentry').each { |entry|                                                            
  entry_date = Time.parse(entry.xpath('date').inner_text)                                             
  if entry_date > last_git_commit                                                                     
    messages << "Revision #{entry['revision']}: #{entry.xpath('msg').inner_text}"                     
  end                                                                                                 
}                                                                                                     
                                                                                                      
# Send to git if there are new updates                                                                
unless messages.empty?                                                                                
  puts "Committing and pushing #{messages.size} new svn updates:"                                     
  messages.each { |m| puts "  #{m}" }                                                                 
  commit_and_push_to_git_with(messages)                                                               
else                                                                                                  
  puts "No new svn updates"                                                                           
end