fly deploy error / ERROR [build 6/6] RUN SECRET_KEY_BASE=DUMMY ./bin/rails assets:precompile

Questions / Help
1

Hello
I’m a Japanese student who is studying programming.
And I’m a beginner.
Now, I have an issue.

I tried to run fly deploy
but I got this error.

=> ERROR [build 6/6] RUN SECRET_KEY_BASE=DUMMY ./bin/rails assets:precompile       3.2s
 ------                                                                                   
  [build 6/6] RUN SECRET_KEY_BASE=DUMMY ./bin/rails assets:precompile:
#0 3.128 sh: 1: yarn: not found
#0 3.128 rails aborted!
#0 3.128 cssbundling-rails: Command css:build failed, ensure yarn is installed and `yarn build:css` runs without errors or use SKIP_CSS_BUILD env variable
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/cssbundling-rails-1.2.0/lib/tasks/cssbundling/build.rake:5:in `block (2 levels) in <main>'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:281:in `block in execute'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:281:in `each'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:281:in `execute'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/sentry-ruby-5.10.0/lib/sentry/rake.rb:24:in `execute'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:219:in `block in invoke_with_call_chain'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:199:in `synchronize'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:199:in `invoke_with_call_chain'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:243:in `block in invoke_prerequisites'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:241:in `each'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:241:in `invoke_prerequisites'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:218:in `block in invoke_with_call_chain'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:199:in `synchronize'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:199:in `invoke_with_call_chain'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/task.rb:188:in `invoke'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/application.rb:160:in `invoke_task'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/application.rb:116:in `block (2 levels) in top_level'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/application.rb:116:in `each'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/application.rb:116:in `block in top_level'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/application.rb:125:in `run_with_threads'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/application.rb:110:in `top_level'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/railties-7.0.7.2/lib/rails/commands/rake/rake_command.rb:24:in `block (2 levels) in perform'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/application.rb:186:in `standard_exception_handling'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/railties-7.0.7.2/lib/rails/commands/rake/rake_command.rb:24:in `block in perform'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/rake-13.0.6/lib/rake/rake_module.rb:59:in `with_application'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/railties-7.0.7.2/lib/rails/commands/rake/rake_command.rb:18:in `perform'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/railties-7.0.7.2/lib/rails/command.rb:51:in `invoke'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/railties-7.0.7.2/lib/rails/commands.rb:18:in `<main>'
#0 3.128 /rails/vendor/bundle/ruby/3.2.0/gems/bootsnap-1.16.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
#0 3.128 Tasks: TOP => assets:precompile => css:build
#0 3.128 (See full trace by running task with --trace)
> ------
> Error: failed to fetch an image or build from source: error building: failed to solve: executor failed running [/bin/sh -c SECRET_KEY_BASE=DUMMY ./bin/rails assets:precompile]: exit code: 1

packege.json ↓

{
  "name": "app",
  "private": "true",
  "dependencies": {
    "autoprefixer": "^10.4.15",
    "daisyui": "^3.7.3",
    "esbuild": "^0.19.2",
    "postcss": "^8.4.29",
    "tailwindcss": "^3.3.3"
  },
  "scripts": {
    "build:css": "tailwindcss -i ./app/assets/stylesheets/application.tailwind.css -o ./app/assets/builds/application.css --minify",
    "build": "esbuild app/javascript/*.* --bundle --sourcemap --outdir=app/assets/builds --public-path=/assets"
  }
}

procfile.dev↓

web: unset PORT && env RUBY_DEBUG_OPEN=true bin/rails server
css: yarn build:css --watch
js: yarn build --watch

Please teach me know how I can solve this issue.
If you want check another files, I will show you them.

2

It looks like your Dockerfile isn’t installing yarn.

If you run the following command, does it suggest changes?

bin/rails generate dockerfile

Can you post your Dockerfile?

3

thank you for your reply!

you helped me a lot
I solved the issue

I didn’t update yarn
it’s reason why it didn’t reflect this issue

now, it’s runnnig well

thank you so much :wink:

4

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