Class: AssetHash::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/asset_hash.rb

Constant Summary collapse

DEFAULT_ASSET_PATHS = 
['favicon.ico', 'images', 'javascripts', 'stylesheets', 'assets']
DEFAULT_GZIP_TYPES = 
['text/css', 'application/javascript']
@@asset_paths = 
DEFAULT_ASSET_PATHS
@@gzip_types = 
DEFAULT_GZIP_TYPES

Class Method Summary collapse

Class Method Details

.absolute_path(path) ⇒ Object 



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# File 'lib/asset_hash.rb', line 42

def self.absolute_path(path)
  File.join path_prefix, path
end

.asset_paths ⇒ Object 



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# File 'lib/asset_hash.rb', line 38

def self.asset_paths
  @@asset_paths
end

.asset_paths=(paths) ⇒ Object 



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# File 'lib/asset_hash.rb', line 34

def self.asset_paths=(paths)
  @@asset_paths = paths
end

.assets ⇒ Object 



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# File 'lib/asset_hash.rb', line 46

def self.assets
  asset_paths.inject([]) {|assets, path|
    path = absolute_path(path)
    assets << path if File.exists? path and !File.directory? path
    assets += Dir.glob(path+'/**/*').inject([]) {|m, file|
      m << file unless File.directory? file; m
    }
  }
end

.fingerprint(path, original_path = nil) ⇒ Object 



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# File 'lib/asset_hash.rb', line 56

def self.fingerprint(path, original_path = nil)
  path = File.join path_prefix, path unless path =~ /#{path_prefix}/
  begin
    d = Digest::MD5.file(original_path || path).hexdigest
    path = path.gsub(path_prefix, '')
    extension = (path =~ /\.gz$/ ? File.extname(File.basename(path, ".gz")) + ".gz" : File.extname(path))
    File.join File.dirname(path), "#{File.basename(path, extension)}-#{d}#{extension}"
  rescue Errno::ENOENT
    return original_path(path)#path.gsub(path_prefix, '')
  end
end

.gzip_types ⇒ Object 



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# File 'lib/asset_hash.rb', line 26

def self.gzip_types
  @@gzip_types
end

.gzip_types=(types) ⇒ Object 



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# File 'lib/asset_hash.rb', line 22

def self.gzip_types=(types)
  @@gzip_types = types
end

.original_path(path) ⇒ Object 



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# File 'lib/asset_hash.rb', line 68

def self.original_path(path)
  path = path.gsub(path_prefix, '')
  extension = (path =~ /\.gz$/ ? File.extname(File.basename(path, ".gz")) + ".gz" : File.extname(path))
  File.join File.dirname(path), "#{File.basename(path, extension)}#{extension}"
end

.path_prefix ⇒ Object 



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# File 'lib/asset_hash.rb', line 30

def self.path_prefix
  defined?(Rails) ? File.join(Rails.root, 'public') : ''
end

.process! ⇒ Object 



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# File 'lib/asset_hash.rb', line 74

def self.process!
  assets.each do |asset|
    mime_type = MIME::Types.of(asset).first.to_s
    if gzip_types.include?(mime_type) && !File.exists?(asset + ".gz")
      # You can GZIP the type of this file and no gzipped version was found already
      # Gzip the original asset then move it to the right filename
      gz_path = asset + ".gz"
      `gzip -c "#{asset}" > "#{gz_path}"`
      FileUtils.mv(gz_path, File.join(path_prefix, fingerprint(asset) + ".gz"))
    end
    FileUtils.cp(asset, File.join(path_prefix, fingerprint(asset)))
  end
end