Class: Sprockets::Preprocessors::DefaultSourceMap

Inherits:
Object
  • Object
show all
Defined in:
lib/sprockets/preprocessors/default_source_map.rb

Overview

Private: Adds a default map to assets when one is not present

If the input file already has a source map, it effectively returns the original result. Otherwise it maps 1 for 1 lines original to generated. This is needed Because other generators run after might depend on having a valid source map available.

Instance Method Summary collapse

Instance Method Details

#call(input) ⇒ Object


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# File 'lib/sprockets/preprocessors/default_source_map.rb', line 11

def call(input)
  result        = { data: input[:data] }
  map           = input[:metadata][:map]
  filename      = input[:filename]
  load_path     = input[:load_path]
  lines         = input[:data].lines.length
  basename      = File.basename(filename)
  mime_exts     = input[:environment].config[:mime_exts]
  pipeline_exts = input[:environment].config[:pipeline_exts]
  if map.nil? || map.empty?
    result[:map] = {
      "version"   => 3,
      "file"      => PathUtils.split_subpath(load_path, filename),
      "mappings"  => default_mappings(lines),
      "sources"   => [PathUtils.set_pipeline(basename, mime_exts, pipeline_exts, :source)],
      "names"     => []
    }
  else
    result[:map] = map
  end

  result[:map]["x_sprockets_linecount"] = lines
  return result
end