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leonardteo/assets.rb

Created April 4, 2013 23:27
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Capistrano assets recipe for precompiling assets if there are changes. Precompilation happens locally and rsync to server automatically. I can't take credit for this. @gvalmon gave me this in a project. :)
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assets.rb
def assets_changed?
from = source.next_revision(current_revision)
asset_dirs = "app/assets/"
capture("cd #{latest_release} && #{source.local.log(from)} #{asset_dirs} | wc -l").to_i > 0
end
namespace :deploy do
namespace :assets do
task :precompile, roles: :web do
is_first_deploy = !remote_file_exists?(File.join(current_path, "REVISION"))
if is_first_deploy || assets_changed?
precompile!
else
logger.info "Skipping asset precompilation because there were no asset changes"
end
end
task :symlink, roles: :web do
run ("rm -rf #{latest_release}/public/assets &&
mkdir -p #{latest_release}/public &&
mkdir -p #{latest_release}/public/stylesheets &&
mkdir -p #{latest_release}/public/javascripts &&
mkdir -p #{latest_release}/public/images &&
mkdir -p #{shared_path}/assets &&
ln -s #{shared_path}/assets #{latest_release}/public/assets")
end
task :precompile!, roles: :web do
rsync_path = "#{user}@#{dns_name}:#{shared_path}"
rsync_options = "--recursive --times --rsh=ssh --compress --human-readable --progress -e 'ssh -p #{port}'"
run_locally("rm -rf public/assets/")
run_locally("rake RAILS_ENV=#{rails_env} assets:precompile")
run_locally("rsync #{rsync_options} public/assets #{rsync_path}")
run_locally("rm -rf public/assets/")
end
task :precompile_and_symlink, roles: :web do
precompile!
symlink
end
end
end
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