Class: Sass::Plugin::Compiler

Inherits:
Object
  • Object
show all
Extended by:
Callbacks
Includes:
Configuration
Defined in:
.ruby-sass/lib/sass/plugin/compiler.rb

Overview

The Compiler class handles compilation of multiple files and/or directories, including checking which CSS files are out-of-date and need to be updated and calling Sass to perform the compilation on those files.

Sass::Plugin uses this class to update stylesheets for a single application. Unlike Sass::Plugin, though, the Compiler class has no global state, and so multiple instances may be created and used independently.

If you need to compile a Sass string into CSS, please see the Engine class.

Unlike Sass::Plugin, this class doesn't keep track of whether or how many times a stylesheet should be updated. Therefore, the following `Sass::Plugin` options are ignored by the Compiler:

  • `:never_update`

  • `:always_check`

Instance Method Summary (collapse)

Methods included from Callbacks

extended

Methods included from Configuration

#add_template_location, #default_options, #options, #remove_template_location, #reset!, #template_location_array

Constructor Details

#initialize(opts = {}) ⇒ Compiler

Creates a new compiler.

Parameters:



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# File '.ruby-sass/lib/sass/plugin/compiler.rb', line 35

def initialize(opts = {})
  @watched_files = Set.new
  options.merge!(opts)
end

Constructor Details

#initialize(opts = {}) ⇒ Compiler

Creates a new compiler.

Parameters:



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# File '.ruby-sass/lib/sass/plugin/compiler.rb', line 35

def initialize(opts = {})
  @watched_files = Set.new
  options.merge!(opts)
end

Instance Method Details

#clean(individual_files = []) ⇒ Object

Remove all output files that would be created by calling update_stylesheets, if they exist.

This method runs the deleting_css and deleting_sourcemap callbacks for the files that are deleted.

Parameters:

  • individual_files (Array<(String, String[, String])>) (defaults to: []) —

    A list of files to check for updates **in addition to those specified by the `:template_location` option.** The first string in each pair is the location of the Sass/SCSS file, the second is the location of the CSS file that it should be compiled to. The third string, if provided, is the location of the Sourcemap file.



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# File '.ruby-sass/lib/sass/plugin/compiler.rb', line 362

def clean(individual_files = [])
  file_list(individual_files).each do |(_, css_file, sourcemap_file)|
    if File.exist?(css_file)
      run_deleting_css css_file
      File.delete(css_file)
    end
    if sourcemap_file && File.exist?(sourcemap_file)
      run_deleting_sourcemap sourcemap_file
      File.delete(sourcemap_file)
    end
  end
  nil
end

#engine_options(additional_options = {}) ⇒ {Symbol => Object}

Non-destructively modifies Sass::Plugin::Configuration#options so that default values are properly set, and returns the result.

Parameters:

Returns:

  • ({Symbol => Object}) —

    The modified options hash



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# File '.ruby-sass/lib/sass/plugin/compiler.rb', line 337

def engine_options(additional_options = {})
  opts = options.merge(additional_options)
  opts[:load_paths] = load_paths(opts)
  options[:sourcemap] = :auto if options[:sourcemap] == true
  options[:sourcemap] = :none if options[:sourcemap] == false
  opts
end

#file_list(individual_files = []) ⇒ Array<(String, String, String)>

Construct a list of files that might need to be compiled from the provided individual_files and the template_locations.

Note: this method does not cache the results as they can change across invocations when sass files are added or removed.

Parameters:

  • individual_files (Array<(String, String[, String])>) (defaults to: []) —

    A list of files to check for updates **in addition to those specified by the `:template_location` option.** The first string in each pair is the location of the Sass/SCSS file, the second is the location of the CSS file that it should be compiled to. The third string, if provided, is the location of the Sourcemap file.

Returns:

  • (Array<(String, String, String)>) —

    A list of [sass_file, css_file, sourcemap_file] tuples similar to what was passed in, but expanded to include the current state of the directories being updated.



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# File '.ruby-sass/lib/sass/plugin/compiler.rb', line 240

def file_list(individual_files = [])
  files = individual_files.map do |tuple|
    if engine_options[:sourcemap] == :none
      tuple[0..1]
    elsif tuple.size < 3
      [tuple[0], tuple[1], Sass::Util.sourcemap_name(tuple[1])]
    else
      tuple.dup
    end
  end

  template_location_array.each do |template_location, css_location|
    Sass::Util.glob(File.join(template_location, "**", "[^_]*.s[ca]ss")).sort.each do |file|
      # Get the relative path to the file
      name = Sass::Util.relative_path_from(file, template_location).to_s
      css = css_filename(name, css_location)
      sourcemap = Sass::Util.sourcemap_name(css) unless engine_options[:sourcemap] == :none
      files << [file, css, sourcemap]
    end
  end
  files
end

#stylesheet_needs_update?(css_file, template_file) ⇒ Boolean

Compass expects this to exist

Returns:

  • (Boolean) 


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# File '.ruby-sass/lib/sass/plugin/compiler.rb', line 346

def stylesheet_needs_update?(css_file, template_file)
  StalenessChecker.stylesheet_needs_update?(css_file, template_file)
end

#update_stylesheets(individual_files = []) ⇒ Object

Updates out-of-date stylesheets.

Checks each Sass/SCSS file in `:template_location` to see if it's been modified more recently than the corresponding CSS file in `:css_location`. If it has, it updates the CSS file.

Parameters:

  • individual_files (Array<(String, String[, String])>) (defaults to: []) —

    A list of files to check for updates **in addition to those specified by the `:template_location` option.** The first string in each pair is the location of the Sass/SCSS file, the second is the location of the CSS file that it should be compiled to. The third string, if provided, is the location of the Sourcemap file.



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# File '.ruby-sass/lib/sass/plugin/compiler.rb', line 201

def update_stylesheets(individual_files = [])
  Sass::Plugin.checked_for_updates = true
  staleness_checker = StalenessChecker.new(engine_options)

  files = file_list(individual_files)
  run_updating_stylesheets(files)

  updated_stylesheets = []
  files.each do |file, css, sourcemap|
    # TODO: Does staleness_checker need to check the sourcemap file as well?
    if options[:always_update] || staleness_checker.stylesheet_needs_update?(css, file)
      # XXX For consistency, this should return the sourcemap too, but it would
      # XXX be an API change.
      updated_stylesheets << [file, css]
      update_stylesheet(file, css, sourcemap)
    else
      run_not_updating_stylesheet(file, css, sourcemap)
    end
  end
  run_updated_stylesheets(updated_stylesheets)
end

#watch(individual_files = [], options = {}) ⇒ Object

Watches the template directory (or directories) and updates the CSS files whenever the related Sass/SCSS files change. `watch` never returns.

Whenever a change is detected to a Sass/SCSS file in `:template_location`, the corresponding CSS file in `:css_location` will be recompiled. The CSS files of any Sass/SCSS files that import the changed file will also be recompiled.

Before the watching starts in earnest, `watch` calls #update_stylesheets.

Note that `watch` uses the [Listen](github.com/guard/listen) library to monitor the filesystem for changes. Listen isn't loaded until `watch` is run. The version of Listen distributed with Sass is loaded by default, but if another version has already been loaded that will be used instead.

Parameters:

  • individual_files (Array<(String, String[, String])>) (defaults to: []) —

    A list of files to check for updates **in addition to those specified by the `:template_location` option.** The first string in each pair is the location of the Sass/SCSS file, the second is the location of the CSS file that it should be compiled to. The third string, if provided, is the location of the Sourcemap file.

  • options (Hash) (defaults to: {}) —

    The options that control how watching works.

Options Hash (options):

  • :skip_initial_update (Boolean) —

    Don't do an initial update when starting the watcher when true



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# File '.ruby-sass/lib/sass/plugin/compiler.rb', line 291

def watch(individual_files = [], options = {})
  @inferred_directories = []
  options, individual_files = individual_files, [] if individual_files.is_a?(Hash)
  update_stylesheets(individual_files) unless options[:skip_initial_update]

  directories = watched_paths
  individual_files.each do |(source, _, _)|
    source = File.expand_path(source)
    @watched_files << Sass::Util.realpath(source).to_s
    @inferred_directories << File.dirname(source)
  end

  directories += @inferred_directories
  directories = remove_redundant_directories(directories)

  # TODO: Keep better track of what depends on what
  # so we don't have to run a global update every time anything changes.
  # XXX The :additional_watch_paths option exists for Compass to use until
  # a deprecated feature is removed. It may be removed without warning.
  directories += Array(options[:additional_watch_paths])

  options = {
    :relative_paths => false,
    # The native windows listener is much slower than the polling option, according to
    # https://github.com/nex3/sass/commit/a3031856b22bc834a5417dedecb038b7be9b9e3e
    :force_polling => @options[:poll] || Sass::Util.windows?
  }

  listener = create_listener(*directories, options) do |modified, added, removed|
    on_file_changed(individual_files, modified, added, removed)
    yield(modified, added, removed) if block_given?
  end

  begin
    listener.start
    sleep
  rescue Interrupt
    # Squelch Interrupt for clean exit from Listen::Listener
  end
end