Local assets precompilation on Rails 4 using Capistrano 3

deploy.rb

# also you need to uncomment next line in Capfile
# require 'capistrano/rails/assets'

namespace :deploy do
  namespace :assets do

    Rake::Task['deploy:assets:precompile'].clear_actions

    desc 'Precompile assets locally and upload to servers'
    task :precompile do
      on roles(fetch(:assets_roles)) do
        run_locally do
          with rails_env: fetch(:rails_env) do
            execute 'bin/rake assets:precompile'
          end
        end

        within release_path do
          with rails_env: fetch(:rails_env) do
            old_manifest_path = "#{shared_path}/public/assets/manifest*"
            execute :rm, old_manifest_path if test "[ -f #{old_manifest_path} ]"
            upload!('./public/assets/', "#{shared_path}/public/", recursive: true)
          end
        end

        run_locally { execute 'rm -rf public/assets' }
      end
    end

  end
end

I have an error while deploying

DEBUG [9ae7a7bd] Command: cd /srv/ulmic_stg/releases/20150521092902 && /usr/bin/env ls /srv/ulmic_stg/releases/20150521092902/public/assets/.sprockets-manifest*
DEBUG [9ae7a7bd]    ls: cannot access /srv/ulmic_stg/releases/20150521092902/public/assets/.sprockets-manifest*: No such file or directory
DEBUG [9ae7a7bd] Finished in 0.358 seconds with exit status 2 (failed).
DEBUG [764edefa] Running /usr/bin/env ls /srv/ulmic_stg/releases/20150521092902/public/assets/manifest*.* as ulmicru@ulmic.ru
DEBUG [764edefa] Command: cd /srv/ulmic_stg/releases/20150521092902 && /usr/bin/env ls /srv/ulmic_stg/releases/20150521092902/public/assets/manifest*.*
DEBUG [764edefa]    ls: cannot access /srv/ulmic_stg/releases/20150521092902/public/assets/manifest*.*: No such file or directory
DEBUG [764edefa] Finished in 0.279 seconds with exit status 2 (failed).
WARN Rails assets manifest file not found.
(Backtrace restricted to imported tasks)
cap aborted!
SSHKit::Runner::ExecuteError: Exception while executing as ulmicru@ulmic.ru: Rails assets manifest file not found.
Capistrano::FileNotFound: Rails assets manifest file not found.

@kalashnikovisme my guess is that your using sprockets 3.x.x which creates the manifest as a hidden file that’s not getting uploaded by the upload! command?

Might also want to check the contents of your shared/public and shared/public/assets folder for old assets and manifests.

Thank you. This is very slow to upload files. Other solutions with rsync may reduce deployment time.
https://gist.github.com/basti/9232976

Thank you. This really saves my ass.

Uploading many files (and some non compressed) can be slow.
Try compressing and packaging for uploading:
[Example here] (https://gist.github.com/jairud-garcia/4e9210c4d896b7c56f5fd54164812b8f)