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/deploy.rake
Created Dec 13, 2012

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A Heroku app deploy rake file that automates asset syncing to S3 via the asset_sync gem by doing the asset compilation locally with the correct ENV vars for asset_sync.
module RailsApplication
module Deploy
class << self
def run(*cmd)
system(*cmd)
raise "Command #{cmd.inspect} failed!" unless $?.success?
end
def deploy(app, branch = "master")
branch ||= "master" #in case it was passed as nil
puts "-----> Compiling Assets..."
heroku_env_vars = heroku_app_env_vars(app)
heroku_env_vars.each {|k, v| ENV[k] = v unless ENV[k].present?}
run "git checkout #{branch}"
Rake::Task["assets:precompile"].execute
run "git add public/assets"
run "git commit -m'deploy compiled assets'"
run "git push origin #{branch}"
puts "-----> Pushing..."
#run "git push git@github.com:RailsApplication/#{app}.git HEAD:master -f"
run "git push --force git@heroku.com:#{app}.git #{branch}:master"
puts "-----> Migrating..."
run "heroku run rake db:migrate --app #{app}"
puts "-----> Seeding..."
run "heroku run rake db:seed --app #{app}"
puts "-----> Restarting..."
run "heroku restart --app #{app}"
end
def heroku_app_env_vars(app)
heroku_env_vars_output = `heroku config -a #{app}`
heroku_env_vars_output_split = heroku_env_vars_output.split("\n")
heroku_env_var_lines = heroku_env_vars_output_split[1, heroku_env_vars_output_split.size]
heroku_env_vars = heroku_env_var_lines.inject({}) do |output, line|
match_data = line.match('([^:]+):(.*)')
output.merge match_data[1].strip => match_data[2].strip
end
end
end
end
end
desc "Deploy heroku app from branch (or master by default)"
task :deploy, [:app, :branch] => [:environment] do |t, args|
RailsApplication::Deploy.deploy(args[:app], args[:branch])
end
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