ImageOptim :: BinResolver :: Error：Bin解決錯誤：remote：pngout worker; 使用image_optim，image_optim_rails推送到Heroku

Question

我的環境中的構建包如下

=== xyz-app Buildpack URLs
1. https://github.com/jasonfb/heroku-buildpack-cedar14-imagemagick704
2. https://github.com/bobbus/image-optim-buildpack
3. heroku/ruby

我試圖將image_optim ， image_optim_rails和image_optim_pack添加到在Heroku Cedar-14上運行的Rails 4.1應用中

當我嘗試僅使用image_optim推送到我的環境時，我能夠成功完成構建。 添加此寶石時

gem'image_optim_rails'並捆綁安裝，然后再次推送到Heroku，在構建階段我崩潰了

WARN: pngcrush 1.7.15 at /tmp/codon/vendor/bin/pngcrush (< 1.7.38) does not have blacken flag
remote:        WARN: gifsicle 1.78 at /tmp/codon/vendor/bin/gifsicle (< 1.85) does not support removing extension blocks
remote:        rake aborted!
remote:        ImageOptim::BinResolver::Error: Bin resolving errors:
remote:        pngout worker: `pngout` not found; please provide proper binary or disable this worker (--no-pngout argument or `:pngout => false` through options)
remote:        pngquant worker: `pngquant` not found; please provide proper binary or disable this worker (--no-pngquant argument or `:pngquant => false` through options)
remote:        jhead worker: `jhead` not found; please provide proper binary or disable this worker (--no-jhead argument or `:jhead => false` through options)
remote:        svgo worker: `svgo` not found; please provide proper binary or disable this worker (--no-svgo argument or `:svgo => false` through options)
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/image_optim-0.24.2/lib/image_optim/worker/class_methods.rb:73:in `create_all'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/image_optim-0.24.2/lib/image_optim/worker/class_methods.rb:44:in `create_all_by_format'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/image_optim-0.24.2/lib/image_optim.rb:86:in `initialize'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/image_optim_rails-0.2.0/lib/image_optim/railtie.rb:28:in `new'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/image_optim_rails-0.2.0/lib/image_optim/railtie.rb:28:in `block in <class:Railtie>'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/railties-4.1.14.2/lib/rails/initializable.rb:30:in `instance_exec'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/railties-4.1.14.2/lib/rails/initializable.rb:30:in `run'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/railties-4.1.14.2/lib/rails/initializable.rb:55:in `block in run_initializers'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/railties-4.1.14.2/lib/rails/initializable.rb:54:in `run_initializers'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/railties-4.1.14.2/lib/rails/application.rb:300:in `initialize!'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/railties-4.1.14.2/lib/rails/railtie.rb:194:in `public_send'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/railties-4.1.14.2/lib/rails/railtie.rb:194:in `method_missing'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/config/environment.rb:5:in `<top (required)>'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.14.2/lib/active_support/dependencies.rb:247:in `block in require'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.14.2/lib/active_support/dependencies.rb:232:in `load_dependency'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.14.2/lib/active_support/dependencies.rb:247:in `require'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/railties-4.1.14.2/lib/rails/application.rb:276:in `require_environment!'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/railties-4.1.14.2/lib/rails/application.rb:405:in `block in run_tasks_blocks'
remote:        /tmp/build_a3bca6e7188e4157414469f76bf31f7d/vendor/bundle/ruby/2.1.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/task.rb:64:in `block (2 levels) in define'
remote:        Tasks: TOP => environment
remote:        (See full trace by running task with --trace)
remote:  !
remote:  !     Precompiling assets failed.
remote:  !
remote:  !     Push rejected, failed to compile Ruby app.
remote: 
remote:  !     Push failed
remote: Verifying deploy...
remote: 
remote: !   Push rejected to mackweldon-europa.
remote: 
To git@heroku.com:mackweldon-europa.git
 ! [remote rejected] image-optim-branch -> master (pre-receive hook declined)

Answer 1

當我同時安裝了兩個寶石時：

gem 'image_optim_rails'
gem 'image_optim_pack'

（請參閱toy / image_optim_rails文檔）

當推到Heroku時，它的工作原理和構建干凈