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Helpers not available in assets:precompile #19

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adamburmister opened this issue Jan 19, 2012 · 3 comments
Closed

Helpers not available in assets:precompile #19

adamburmister opened this issue Jan 19, 2012 · 3 comments

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@adamburmister
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I have found that I am getting an error when running assets:precompile stating the helpers are not available.

error evaluating function image-url``

Everything runs fine in development mode with dynamic compilation of stylesheets, but not on precompile. Any suggestions as to why they are not available?

rake assets:precompile --trace
** Invoke assets:precompile (first_time)
** Execute assets:precompile
/Users/adam/.rvm/rubies/ruby-1.9.2-p290/bin/ruby /Users/adam/.rvm/gems/ruby-1.9.2-p290/bin/rake assets:precompile:all RAILS_ENV=production RAILS_GROUPS=assets --trace
** Invoke assets:precompile:all (first_time)
** Execute assets:precompile:all
** Invoke assets:precompile:primary (first_time)
** Invoke assets:environment (first_time)
** Execute assets:environment
** Invoke environment (first_time)
** Execute environment
** Invoke tmp:cache:clear (first_time)
** Execute tmp:cache:clear
** Execute assets:precompile:primary
rake aborted!
error evaluating function `image-url`
  (in /Users/adam/Development/backchat-marketing/app/assets/stylesheets/homepage.css.less)
at /Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/less-2.0.8/lib/less/js/lib/less/parser.js:336:38
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/less-2.0.8/lib/less/parser.rb:88:in `block in to_css'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/less-2.0.8/lib/less/parser.rb:13:in `block in calljs'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/less-2.0.8/lib/less/parser.rb:27:in `block in lock'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/less-2.0.8/lib/less/parser.rb:25:in `lock'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/less-2.0.8/lib/less/parser.rb:12:in `calljs'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/less-2.0.8/lib/less/parser.rb:87:in `to_css'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/less-rails-2.1.2/lib/less/rails/template_handlers.rb:17:in `evaluate'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/tilt-1.3.3/lib/tilt/template.rb:76:in `render'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/context.rb:175:in `block in evaluate'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/context.rb:172:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/context.rb:172:in `evaluate'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:171:in `build_dependency_context_and_body'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:135:in `dependency_context'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:194:in `build_dependencies_paths_and_assets'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:141:in `dependency_paths'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:61:in `mtime'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/asset.rb:58:in `block in encode_with'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/asset.rb:57:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/asset.rb:57:in `encode_with'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:43:in `encode_with'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/caching.rb:52:in `cache_asset'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/index.rb:67:in `block in build_asset'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/index.rb:76:in `memoize'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/index.rb:65:in `build_asset'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/trail.rb:102:in `find_asset_in_path'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/base.rb:101:in `find_asset'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/index.rb:48:in `find_asset'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/base.rb:110:in `[]'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/less-rails-2.1.2/lib/less/rails/import_processor.rb:13:in `block in evaluate'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/less-rails-2.1.2/lib/less/rails/import_processor.rb:12:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/less-rails-2.1.2/lib/less/rails/import_processor.rb:12:in `evaluate'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/tilt-1.3.3/lib/tilt/template.rb:76:in `render'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/context.rb:175:in `block in evaluate'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/context.rb:172:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/context.rb:172:in `evaluate'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:171:in `build_dependency_context_and_body'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:135:in `dependency_context'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:194:in `build_dependencies_paths_and_assets'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:141:in `dependency_paths'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:61:in `mtime'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/asset.rb:58:in `block in encode_with'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/asset.rb:57:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/asset.rb:57:in `encode_with'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/bundled_asset.rb:43:in `encode_with'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/caching.rb:52:in `cache_asset'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/index.rb:67:in `block in build_asset'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/index.rb:76:in `memoize'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/index.rb:65:in `build_asset'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/trail.rb:102:in `find_asset_in_path'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/base.rb:101:in `find_asset'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/index.rb:48:in `find_asset'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.3/lib/sprockets/static_compiler.rb:20:in `block in compile'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/base.rb:151:in `block in each_logical_path'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/base.rb:139:in `block (2 levels) in each_file'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/base.rb:129:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/base.rb:129:in `each_entry'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/base.rb:137:in `block in each_file'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/base.rb:136:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/base.rb:136:in `each_file'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/sprockets-2.0.3/lib/sprockets/base.rb:149:in `each_logical_path'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.3/lib/sprockets/static_compiler.rb:18:in `compile'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.3/lib/sprockets/assets.rake:52:in `internal_precompile'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.3/lib/sprockets/assets.rake:66:in `block (3 levels) in <top (required)>'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/Users/adam/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.3/lib/sprockets/assets.rake:56:in `block (3 levels) in <top (required)>'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/Users/adam/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in `load'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in `<main>'
Tasks: TOP => assets:precompile:primary
rake aborted!
Command failed with status (1): [/Users/adam/.rvm/rubies/ruby-1.9.2-p290/bi...]
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/file_utils.rb:53:in `block in create_shell_runner'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/file_utils.rb:45:in `call'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/file_utils.rb:45:in `sh'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/file_utils_ext.rb:39:in `sh'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/file_utils.rb:80:in `ruby'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/file_utils_ext.rb:39:in `ruby'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.3/lib/sprockets/assets.rake:9:in `ruby_rake_task'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.3/lib/sprockets/assets.rake:17:in `invoke_or_reboot_rake_task'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.3/lib/sprockets/assets.rake:25:in `block (2 levels) in <top (required)>'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/Users/adam/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in `load'
/Users/adam/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in `<main>'
@adamburmister
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I'm opening up the gem and trying to debug the issue: for your reference this is the parser options hash being generated:

{:filename=>"/Users/adam/Development/backchatio-marketing/app/assets/stylesheets/homepage.css.less", :line=>1, :paths=>["/Users/adam/Development/backchatio-marketing/app/assets/stylesheets", "/Users/adam/Development/backchatio-marketing/vendor/assets/stylesheets", "/Users/adam/.rvm/gems/ruby-1.9.2-p180/gems/less-rails-bootstrap-1.4.2/vendor/assets/stylesheets", "/Users/adam/.rvm/gems/ruby-1.9.2-p180/gems/less-rails-bootstrap-1.4.2/vendor/frameworks", "/Users/adam/Development/backchatio-marketing/app/assets/fonts", "/Users/adam/Development/backchatio-marketing/app/assets/images", "/Users/adam/Development/backchatio-marketing/app/assets/javascripts", "/Users/adam/Development/backchatio-marketing/app/assets/stylesheets", "/Users/adam/Development/backchatio-marketing/vendor/assets/stylesheets", "/Users/adam/.rvm/gems/ruby-1.9.2-p180/gems/jquery-rails-1.0.19/vendor/assets/javascripts", "/Users/adam/.rvm/gems/ruby-1.9.2-p180/gems/less-rails-bootstrap-1.4.2/vendor/assets/javascripts", "/Users/adam/.rvm/gems/ruby-1.9.2-p180/gems/less-rails-bootstrap-1.4.2/vendor/assets/stylesheets"]}

Opening the parser.js file and dumping out the tree.functions object's keys I find the following, which indicates they are there and available for use:

rgb,rgba,hsl,hsla,hue,saturation,lightness,alpha,saturate,desaturate,lighten,darken,fadein,fadeout,fade,spin,mix,greyscale,e,escape,%,round,argb,asset-path,asset-url,image-path,image-url,video-path,video-url,audio-path,audio-url,javascript-path,javascript-url,stylesheet-path,stylesheet-url,font-path,font-url,asset-data-url

@adamburmister
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I have drilled down to the Less-2.0.8 gem, into call.js to debug the try/catch there.

The resulting exception message is:
Error: This asset host cannot be computed without a request in scope. Remove the second argument to your asset_host Proc if you do not need the request.

@adamburmister
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The cause of the problem was the setting of asset_host to a Proc within rails. The aim of this was to switch HTTP/HTTPS on the CDN we use. This may be a common issue for others.

The cause:

config.action_controller.asset_host = Proc.new do |source, request|
    method = request.ssl? ? "https" : "http"
    "#{method}://foobar.cloudfront.net"
end

The solution:
Remove the CDN switch, or guard against the missing request argument.

config.action_controller.asset_host = Proc.new do |source, request=nil|
    method = request != nil && request.ssl? ? "https" : "http"
    "#{method}://foobar.cloudfront.net"
end

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@adamburmister