我正在使用sass-rails和haml-rails gems，这样我就可以用 HAML-sass 样式编写 css 文件。
问题是当我想进行生产并预编译我的样式表时，命令rake assets:precompile运行没有错误，但生成的 application.css 是空的。
这是我的 Gemfile ：
source 'https://rubygems.org'
gem 'rails', '~>3.2'
gem 'pg', '>= 0.14'
gem 'haml-rails' #, '~> 0.3'
group :development, :test do
gem 'factory_girl_rails'
end
group :developpement do
gem 'rspec-rails', '>= 2.11'
gem 'capistrano', '>= 2.12'
gem 'faker', '>= 1.0'
gem 'rvm-capistrano'
end
group :test do
gem 'rspec', '>= 2.11'
gem 'webrat', '>= 0.7'
gem 'spork-rails', '>= 3.2'
end
group :assets do
gem 'sass-rails', '>= 3.2.3'
gem 'coffee-rails', '>= 3.2.1'
gem 'compass-rails', '>= 1.0'
gem 'execjs'
gem 'therubyracer', :platforms => :ruby
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
gem 'annotate'
gem 'excel_rails' #, '~> 0.3'
gem 'spreadsheet' #, '~> 0.7'
gem "schema_plus", :git => "git://github.com/lomba/schema_plus.git"
gem 'ar-octopus' #, '~> 0.3'
gem 'squeel' #, '~> 1.0'
gem 'devise' #, '~> 2.1'
gem 'role_model'
gem 'declarative_authorization'
gem 'rails-translate-routes' #, '~> 0.1'
gem 'validates_timeliness' #, '~> 3.0'
这是我的（空）app/assets/stylesheets/application.css.sass
/*
* This is a manifest file that'll be compiled into application.css, which will include all the files
* listed below.
*
* Any CSS and SCSS file within this directory, lib/assets/stylesheets, vendor/assets/stylesheets,
* or vendor/assets/stylesheets of plugins, if any, can be referenced here using a relative path.
*
* You're free to add application-wide styles to this file and they'll appear at the top of the
* compiled file, but it's generally better to create a new file per style scope.
*
*/
我根据https://github.com/rails/sass-rails上的建议删除了以下注释行：
*= require_self
*= require_tree .
我的 css.sass 文件存储在这里：
- 应用程序/资产/样式表/screen.css.sass
- app/assets/stylesheets/partials/（screen.css.sass 引用的许多部分文件 _*.css.sass）
=== 更新 ===
请注意我正在使用 COMPASS gem。所以 mixin 和变量需要在样式表之间共享。
以防万一，这是我的 app/assets/stylsheets/screen.css.sass 文件：
// This import applies a global reset to any page that imports this stylesheet.
@import blueprint/reset
// To configure blueprint, edit the partials/base.sass file.
@import partials/base
@import blueprint/interaction
@import blueprint/typography
@import blueprint/grid
@import blueprint/buttons
@import blueprint/utilities
@import compass/layout/grid-background
@import compass/typography/lists/inline-block-list
@import compass/typography/lists/horizontal-list
@import compass/utilities/general/float
@import compass/css3/border-radius
@import compass/css3/box-shadow
@import compass/css3/text-shadow
@import compass/css3/transition
@import partials/opf_mixins_et_functions
@import partials/link_icons
@import partials/typo
@import partials/application
@import partials/affichage_donnees
@import partials/tableau_edition
@import partials/page
@import partials/form
@import partials/feedback
=== 更新 2 ===
我意识到我的 Gemfile 会导致我在生产中遇到麻烦，因为我将以下 Gems 放在assets 组中：
group :assets do
...
gem 'execjs'
gem 'therubyracer', :platforms => :ruby
...
end
因为生产环境也需要一个 javascript 解释器......所以我会将它们移到我的 Gemfile 中的任何组之外。
欢迎任何建议