Class: Condenser::Manifest

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Manifest

Returns a new instance of Manifest.



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# File 'lib/condenser/manifest.rb', line 6

def initialize(*args)
  args.compact!
  
  if args.first.is_a?(Condenser)
    @environment = args.shift
    @logger = @environment.logger
  else
    @environment = nil
    @logger = Logger.new($stdout, level: :info)
  end
  
  @dir, @filename = args[0], args[1]
  
  # Expand paths
  @dir = File.expand_path(@dir) if @dir
  @filename  = File.expand_path(@filename) if @filename
  
  # If filename is given as the second arg
  if @dir && File.extname(@dir) != ""
    @dir, @filename = nil, @dir
  end
  
  # Default dir to the directory of the filename
  @dir ||= File.dirname(@filename) if @filename
  
  # If directory is given w/o filename, pick a random manifest location
  if @dir && @filename.nil?
    @filename = File.join(@dir, 'manifest.json')
  end
  
  unless @dir && @filename
    raise ArgumentError, "manifest requires output filename"
  end
  
  if File.exist?(@filename)
    begin
      @data = JSON.parse(File.read(@filename))
    rescue JSON::ParserError => e
      @data = {}
      logger.error "#{@filename} is invalid: #{e.class} #{e.message}"
    end
  else
    @data = {}
  end
end

Instance Attribute Details

#dir ⇒ Object (readonly)

Returns the value of attribute dir.



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# File 'lib/condenser/manifest.rb', line 4

def dir
  @dir
end

#environment ⇒ Object (readonly)

Returns the value of attribute environment.



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# File 'lib/condenser/manifest.rb', line 4

def environment
  @environment
end

#filename ⇒ Object (readonly)

Returns the value of attribute filename.



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# File 'lib/condenser/manifest.rb', line 4

def filename
  @filename
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/condenser/manifest.rb', line 4

def logger
  @logger
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/condenser/manifest.rb', line 80

def [](key)
  add(key) if @environment
  @data[key]
end

#add(*args) ⇒ Object 



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# File 'lib/condenser/manifest.rb', line 56

def add(*args)
  if @environment.nil?
    raise Error, "manifest requires environment for compilation"
  end
  
  outputs = []
  args.each do |arg|
    @environment.resolve(arg).each do |asset|
      outputs += add_asset(asset)
    end
  end
end

#add_asset(asset) ⇒ Object 



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# File 'lib/condenser/manifest.rb', line 69

def add_asset(asset)
  export = asset.export

  @data[asset.filename] = export.to_json
  outputs = export.write(@dir)
  asset.linked_assets.each do |la|
    @environment.resolve(la).each { |a| outputs += add_asset(a) }
  end
  outputs
end

#clean(age = 2419200) ⇒ Object

Cleanup old assets in the compile directory. By default it will keep the latest version and remove any other files over 4 weeks old.



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# File 'lib/condenser/manifest.rb', line 106

def clean(age = 2419200)
  clean_dir(@dir, @data.values.map{ |v| v['path'] }, Time.now - age)
end

#clean_dir(dir, assets, age) ⇒ Object 



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# File 'lib/condenser/manifest.rb', line 110

def clean_dir(dir, assets, age)
  Dir.each_child(dir) do |child|
    child = File.join(dir, child)
    next if assets.find { |x| child.start_with?(x) }

    if File.directory?(child)
      clean_dir(dir, assets, age)
    elsif File.file?(child) && File.stat(child).mtime < age
      File.delete(child)
    end
  end
end

#clobber ⇒ Object

Wipe directive



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# File 'lib/condenser/manifest.rb', line 124

def clobber
  return if !Dir.exist?(dir)
  
  FileUtils.rm(filename)
  logger.info "Removed #{filename}"
  
  Dir.each_child(dir) do |child|
    FileUtils.rm_r(File.join(dir, child))
  end
  
  logger.info "Removed contents of #{dir}"
  nil
end

#compile(*args) ⇒ Object 



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# File 'lib/condenser/manifest.rb', line 85

def compile(*args)
  reset
  outputs = add(*args.flatten)
  save
  outputs
end

#export(*args) ⇒ Object 



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# File 'lib/condenser/manifest.rb', line 99

def export(*args)
  add(*args)
  save
end

#reset ⇒ Object 



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# File 'lib/condenser/manifest.rb', line 52

def reset
  @data = {}
end

#save ⇒ Object

Persist manfiest back to FS



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# File 'lib/condenser/manifest.rb', line 93

def save
  return if @filename.nil?
  FileUtils.mkdir_p File.dirname(@filename)
  Utils.atomic_write(@filename) { |f| f.write(JSON.generate(@data)) }
end