Class: JAPR::Pipeline

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(manifest, prefix, source, destination, type, options = {}) ⇒ Pipeline

Initialize new pipeline



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# File 'lib/japr/pipeline.rb', line 81

def initialize(manifest, prefix, source, destination, type, options = {})
  @manifest = manifest
  @prefix = prefix
  @source = source
  @destination = destination
  @type = type
  @options = JAPR::DEFAULTS.merge(options)

  process
end

Instance Attribute Details

#assets ⇒ Object (readonly)

Returns the value of attribute assets.



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# File 'lib/japr/pipeline.rb', line 92

def assets
  @assets
end

#html ⇒ Object (readonly)

Returns the value of attribute html.



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# File 'lib/japr/pipeline.rb', line 92

def html
  @html
end

Class Method Details

.cache ⇒ Object

Cache processed pipelines



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# File 'lib/japr/pipeline.rb', line 53

def cache
  @cache ||= {}
end

.clear_cache ⇒ Object

Empty cache



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# File 'lib/japr/pipeline.rb', line 58

def clear_cache
  @cache = {}
end

.hash(source, manifest, options = {}) ⇒ Object

Generate hash based on manifest



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# File 'lib/japr/pipeline.rb', line 5

def hash(source, manifest, options = {})
  options = DEFAULTS.merge(options)
  begin
    Digest::MD5.hexdigest(YAML.load(manifest).map! do |path|
      "#{path}#{File.mtime(File.join(source, path)).to_i}"
    end.join.concat(options.to_s))
  rescue Exception => e
    puts "Failed to generate hash from provided manifest: #{e.message}"
    raise e
  end
end

.puts(message) ⇒ Object

Add prefix to output



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# File 'lib/japr/pipeline.rb', line 75

def puts(message)
  $stdout.puts("Asset Pipeline: #{message}")
end

.remove_staged_assets(source, config) ⇒ Object

Remove staged assets



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# File 'lib/japr/pipeline.rb', line 63

def remove_staged_assets(source, config)
  config = DEFAULTS.merge(config)
  staging_path = File.join(source, config['staging_path'])
  FileUtils.rm_rf(staging_path)
  rescue Exception => e
    puts "Failed to remove staged assets: #{e.message}"

    # Re-raise the exception
    raise e
end

.run(manifest, prefix, source, destination, tag, type, config) ⇒ Object

Run pipeline



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# File 'lib/japr/pipeline.rb', line 18

def run(manifest, prefix, source, destination, tag, type, config)
  # Get hash for pipeline
  hash = hash(source, manifest, config)

  # Check if pipeline has been cached
  if cache.key?(hash)
    # Return cached pipeline and cached status
    return cache[hash], true
  else
    begin
      puts "Processing '#{tag}' manifest '#{prefix}'"

      # Create and process new pipeline
      pipeline = new(manifest, prefix, source, destination, type, config)
      pipeline.assets.each do |asset|
        puts "Saved '#{asset.filename}' to " \
             "'#{destination}/#{asset.output_path}'"
      end

      # Add processed pipeline to cache
      cache[hash] = pipeline

      # Return newly processed pipeline and cached status
      return pipeline, false
    rescue Exception => e
      # Add exception to cache
      cache[hash] = e

      # Re-raise the exception
      raise e
    end
  end
end