Class: Juicer::Minifyer::ClosureCompiler

Inherits:
Object
  • Object
show all
Includes:
Chainable, JavaBase
Defined in:
lib/juicer/minifyer/closure_compiler.rb

Overview

Provides an interface to the Closure compiler library using Juicer::Shell::Binary. The Closure compiler library is implemented using Java, and as such Java is required when running this code. Also, the compiler jar file has to be provided.

The Closure Compiler is invoked using the java binary and the compiler jar file.

Providing the Jar file (usually compiler.jar) can be done in several ways. The following directories are searched (in preferred order)

1. The directory specified by the option :bin_path
2. The directory specified by the environment variable $CLOSUREC_HOME, if set
3. Current working directory

For more information on how the Jar is located, see Juicer::Minify::ClosureCompiler.locate_jar

Author

Christian Johansen ([email protected]), Pavel Valodzka ([email protected])

Copyright

Copyright © 2008-2009 Christian Johansen, © 2009 Pavel Valodzka

License

MIT

Usage example =

closure = Juicer::Minifyer::ClosureCompiler.new closure.java = “/usr/local/bin/java” # If 'java' is not on path closure.path << “/home/user/java/yui_compressor/” closure.save(“”, “”)

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Chainable

included, #next_in_chain, #next_in_chain=

Methods included from JavaBase

#command, #initialize, #jar_args, #set_opts

Methods included from Binary

#command, #execute, #get_opt, #initialize, #locate, #method_missing, #options, #path, #set_opt, #set_opts

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Juicer::Binary

Class Method Details

.bin_base_nameObject


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# File 'lib/juicer/minifyer/closure_compiler.rb', line 72

def self.bin_base_name
  "*compiler"
end

.env_nameObject


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# File 'lib/juicer/minifyer/closure_compiler.rb', line 76

def self.env_name
  "CLOSUREC_HOME"
end

Instance Method Details

#save(file, output = nil, type = nil) ⇒ Object

Compresses a file using the YUI Compressor. Note that the :bin_path option needs to be set in order for YuiCompressor to find and use the YUI jar file. Please refer to the class documentation for how to set this.

file = The file to compress output = A file or stream to save the results to. If not provided the

original file will be overwritten

type = Either :js or :css. If this parameter is not provided, the type

is guessed from the suffix on the input file name

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# File 'lib/juicer/minifyer/closure_compiler.rb', line 51

def save(file, output = nil, type = nil)
  type = type.nil? ? file.split('.')[-1].to_sym : type

  use_tmp = unless output
              output = file
              file = File.join(Dir::tmpdir, File.basename(file) + '.min.tmp.' + type.to_s)
              FileUtils.mkdir_p(File.dirname(file))
              FileUtils.move(output, file)

              true
            end

  out_dir = File.dirname(output)
  FileUtils.mkdir_p(out_dir) unless File.exists?(out_dir)
  execute("-jar", "#{locate_jar}#{jar_args}", "--js_output_file", output, "--js", file)

  File.delete(file) if use_tmp
end