September 13, 2007

Subversion commit email notification script

find more posts in: ruby, subversion

So I’ve been using Subversion on a Linux box for a while now to manage my code for various freelance and personal projects. I’ve recently started working with some other people who need access to the server, and I wanted to receive emails when they make a commit. I also didn’t want to deal with svnnotify (um, or I possibly didn’t know about it until it was too late). Luckily Subversion makes it very easy to write a post-commit script to do this. Here’s the ruby script I ended up with:

#!/usr/bin/ruby
require 'rubygems'
require 'action_mailer'
 
class SimpleMailer < ActionMailer::Base
  def simple_message(to, sub, message)			                
    from 'walrus svn <svn@wlrs.net>'					                
    recipients to.join(", ")
    subject sub
    body message
  end
end
 
path = ARGV[0]
revision = ARGV[1]
 
user = `/usr/bin/svnlook author #{path} -r #{revision}`.chomp
log = `/usr/bin/svnlook log #{path} -r #{revision}`.chomp
changed = `/usr/bin/svnlook changed #{path} -r #{revision}`.chomp
diff = `/usr/bin/svnlook diff #{path} -r #{revision}`.chomp
dirs = `/usr/bin/svnlook dirs-changed #{path} -r #{revision}`.chomp
date = `/usr/bin/svnlook date #{path} -r #{revision}`.chomp
 
dir_list = dirs.split("\n").collect do |dir| 
  dir =~ /([^\/]+)/
  $1
end
dir_list.uniq!
 
recipients = ["joey@wlrs.net"]
 
#other people might want these emails
recipients << "team@mycompany.com" if dir_list.include?("mycompany.com")
recipients << "someone.else@oursite.com" if dir_list.include?("oursite.com")
 
subject_log = log.split("\n")[0].slice(0..60)
dir_string = dir_list.join(", ")
subject = "r#{revision} #{user} in #{dir_string}: \"#{subject_log}\""
message = "#{user} committed these changes on #{date}:\n\n#{log}\n\n#{changed}\n\n#{diff}"
ActionMailer::Base.smtp_settings = { :address => 'localhost', :port => 25, :domain => 'localdomain'}
SimpleMailer.deliver_simple_message(recipients, subject, message)

Projects in my repository are setup like this:

svn/oursite.com/trunk
svn/mycompany.com/trunk

That means we just look at the svn directory to see which project is being modified, then we alert the appropriate people. The emails are plain text and include the commit comments, modified files, and a full diff of the commit. What else do you need?

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My name is Joey Nelson. I'm a web developer living in Portland, OR. I'm married to an awesome lady and we have two weird little pugs. I do a weekly comedy podcast and make dumb songs with this guy Ben. I don't post to this blog very often, and very few people actually read it. If you'd like to find out more about my fascinating life, check this stuff out:
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