Collect information about different constructs in the Sass/SCSS style sheets
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Empirical Study on Sass

Collect information from Sass/SCSS style sheets and write them into pipe-separated files for statistical analysis, mostly for research purposes. This information include:

  1. variable declarations (Output file: {extension}-variableDeclarationsInfo.txt)
    • Variable name and location name
    • The scope of the variable (global or local)
    • The type of the value stored in the variable. This type can take one of these possible values: color, number, identifier, string, function call, and "other" for all other types of values
  2. Mixin calls ({extension}-mixinCallsInfo.txt)
    • Name and location
    • Total number of arguments passed to the mixin
    • Name and location of the corresponding Mixin declaration
  3. Mixin Declarations (Output file: {extension}-mixinDeclarationInfo.txt)
    • Name and location
    • Number of times the mixin is called
    • Number of parameters
    • Number of declarations which directly or indirectly (i.e., using nesting) exist inside the body of the mixin
    • Number of declarations in the body of the mixin which use at least one of the parameters of the mixin
    • Number of declarations styling vendor-specific properties (e.g., -webkit-column-gap vs -moz-column-gap)
    • Number of distinct parameters which are used for two or more different property types (e.g., a parameter used for styling the top and margin properties)
    • Number of declarations using only hard-coded (i.e., literal) values
    • Number of vendor-specific property declarations which share at least one of the mixin’s parameters
  4. Selectors and Nesting (Output file: {extension}-selectorsInfo.txt)
    • Name and location
    • Number of base selectors it consists of (e.g., the grouped selector H1, A > B consists of two base selectors, namely H1 and A > B)
    • Number of combinator selectors in the list of its base selectors (the presence of a combinator selector indicates a missed nesting opportunity)
    • Name of its parent selector
  5. @extend construct (Output file: {extension}-extendInfo.txt)
    • The target selector which is extended

({extension} = "sass" or "scss", depending on the main input file)


  1. Clone this repo.
  2. Clone Sass in the directory named "sass", besides the directory of the cloned repo in 1.
  3. Create a file named "mainfiles.txt" in the folder that you have all the Sass/SCSS files to be examined. In this file, enter the name of the main Sass/SCSS files (i.e., the ones that you would pass to Sass compiler to get the corresponding CSS file). You can enter multiple files, each in a separate line.
  4. Run this code with two args: 1) Path to the folder where output files have to be written, 2) Path to the folder having the the file "mainfiles.txt"


The MIT License