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task :deploy => ['deploy:push', 'deploy:restart', 'deploy:tag']
namespace :deploy do
task :migrations => [:push, :off, :migrate, :restart, :on, :tag]
task :rollback => [:off, :push_previous, :restart, :on]
task :push do
puts 'Deploying site to Heroku ...'
puts `git push heroku`
end
task :restart do
puts 'Restarting app servers ...'
puts `heroku restart`
end
task :tag do
release_name = "release-#{Time.now.utc.strftime("%Y%m%d%H%M%S")}"
puts "Tagging release as '#{release_name}'"
puts `git tag -a #{release_name} -m 'Tagged release'`
puts `git push --tags heroku`
end
task :migrate do
puts 'Running database migrations ...'
puts `heroku rake db:migrate`
end
task :off do
puts 'Putting the app into maintenance mode ...'
puts `heroku maintenance:on`
end
task :on do
puts 'Taking the app out of maintenance mode ...'
puts `heroku maintenance:off`
end
task :push_previous do
releases = `git tag`.split("\n").select { |t| t[0..7] == 'release-' }.sort
current_release = releases.last
previous_release = releases[-2] if releases.length >= 2
if previous_release
puts "Rolling back to '#{previous_release}' ..."
puts "Checking out '#{previous_release}' in a new branch on local git repo ..."
puts `git checkout #{previous_release}`
puts `git checkout -b #{previous_release}`
puts "Removing tagged version '#{previous_release}' (now transformed in branch) ..."
puts `git tag -d #{previous_release}`
puts `git push heroku :refs/tags/#{previous_release}`
puts "Pushing '#{previous_release}' to Heroku master ..."
puts `git push heroku +#{previous_release}:master --force`
puts "Deleting rollbacked release '#{current_release}' ..."
puts `git tag -d #{current_release}`
puts `git push heroku :refs/tags/#{current_release}`
puts "Retagging release '#{previous_release}' in case to repeat this process (other rollbacks)..."
puts `git tag -a #{previous_release} -m 'Tagged release'`
puts `git push --tags heroku`
puts "Turning local repo checked out on master ..."
puts `git checkout master`
puts 'All done!'
else
puts "No release tags found - can't roll back!"
puts releases
end
end
end
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