Databases
StackOverflow2013
Postsdbo
POHow to use SASS to parse a list of all CSS selectors in an .scss file?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to use SASS to parse a list of all CSS selectors in an .scss file?
    primarykey
    data
    text
    <p>I'd like to programmatically parse an .scss file to generate a flat list of selectors that are used in that file, mostly as basis for some static code analysis.</p> <p>In SASS terms, I'm looking for a way to get a list of all <code>Sass::Tree::RuleNode</code> for a given .scss file. </p> <p>So far I'm using <code>Sass::Engine.for_file</code> to create a Tree. Then, in order to use <code>Sass::Tree::RuleNode.resolved_rules</code> on the individual Nodes I have to use <code>Tree::Visitors::Cssize</code>, according to the documentation. But somewhere in there is a (probably simple) error.</p> <pre><code>require 'sass' sass_engine = Sass::Engine.for_file('files/examples.scss',{ :style =&gt; :compact, :load_paths =&gt; ['files'], :syntax =&gt; :scss, }) tree = sass_engine.to_tree Sass::Tree::Visitors::Cssize.visit(tree) tree.each do |node| if node.is_a? Sass::Tree::RuleNode puts node.resolved_rules end end </code></pre> <p>This is the error and stacktrace I'm getting:</p> <pre><code>ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:186:in `visit_prop': undefined method `empty?' for nil:NilClass (NoMethodError) ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:37:in `visit' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:21:in `visit' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `block in visit_children' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `map' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `visit_children' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:30:in `block in visit_children' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:52:in `with_parent' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:29:in `visit_children' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:37:in `block in visit' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:201:in `visit_rule' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:37:in `visit' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:21:in `visit' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `block in visit_children' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `map' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `visit_children' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:30:in `block in visit_children' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:52:in `with_parent' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:29:in `visit_children' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:37:in `block in visit' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:65:in `visit_root' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:37:in `visit' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:21:in `visit' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:24:in `visit' ruby-1.9.3-p362/gems/sass-3.2.10/lib/sass/tree/visitors/cssize.rb:6:in `visit' </code></pre> <p>Thanks a lot in advance.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. UStimme
    1. UStimme
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow to use SASS to parse a list of all CSS selectors in an .scss file?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POHow to use SASS to parse a list of all CSS selectors in an .scss file?
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POHow to use SASS to parse a list of all CSS selectors in an .scss file?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COMaybe a stacktrace would help someone to help you. :)
      singulars
      1. POHow to use SASS to parse a list of all CSS selectors in an .scss file?
      1. USlolmaus - Andrey Mikhaylov
    2. COAdded stacktrace.
      singulars
      1. POHow to use SASS to parse a list of all CSS selectors in an .scss file?
      1. UStimme
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload