Module: Sprockets::Utils

Defined in:
lib/sprockets/utils.rb

Overview

‘Utils`, we didn’t know where else to put it!

Constant Summary collapse

UTF8_BOM_PATTERN =

Define UTF-8 and UTF-16 BOM pattern matchers. Avoid using a Regexp literal to prevent syntax errors in other interpreters.

Regexp.new("\\A\\xEF\\xBB\\xBF")
UTF16_BOM_PATTERN = 
Regexp.new("\\A(\\xFE\\xFF|\\xFF\\xFE)")

Class Method Summary collapse

Class Method Details

.normalize_extension(extension) ⇒ Object

Prepends a leading “.” to an extension if its missing.

normalize_extension("js")
# => ".js"

normalize_extension(".css")
# => ".css"



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# File 'lib/sprockets/utils.rb', line 58

def self.normalize_extension(extension)
  extension = extension.to_s
  if extension[/^\./]
    extension
  else
    ".#{extension}"
  end
end

.read_unicode(pathname) ⇒ Object 



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# File 'lib/sprockets/utils.rb', line 11

def self.read_unicode(pathname)
  pathname.read.tap do |data|
    # Eager validate the file's encoding. In most cases we
    # expect it to be UTF-8 unless `default_external` is set to
    # something else. An error is usually raised if the file is
    # saved as UTF-16 when we expected UTF-8.
    if !data.valid_encoding?
      raise EncodingError, "#{pathname} has a invalid " +
        "#{data.encoding} byte sequence"

    # If the file is UTF-8 and theres a BOM, strip it for safe concatenation.
    elsif data.encoding.name == "UTF-8" && data =~ UTF8_BOM_PATTERN
      data.sub!(UTF8_BOM_PATTERN, "")
    end
  end
end