Class: Envandle::GemspecCache

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

Defined Under Namespace

Classes: Reserved

Constant Summary collapse

@@mutex = 
Mutex.new

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ GemspecCache

Returns a new instance of GemspecCache.



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# File 'lib/envandle/gemspec_cache.rb', line 5

def initialize(path)
  @path = path
  FileUtils.mkdir_p @path
end

Instance Attribute Details

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/envandle/gemspec_cache.rb', line 10

def path
  @path
end

Instance Method Details

#append(url, dir) ⇒ Object 



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# File 'lib/envandle/gemspec_cache.rb', line 22

def append(url, dir)
  with_file do |f|
    data = YAML.load(f.read) || {}
    data[url] = dir
    f.rewind
    f.write data.to_yaml
    f.flush
    f.truncate f.pos
  end
end

#find(url) ⇒ Object 



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# File 'lib/envandle/gemspec_cache.rb', line 39

def find(url)
  if dir = load[url]
    File.join(@path, dir)
  end
end

#load ⇒ Object 



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# File 'lib/envandle/gemspec_cache.rb', line 33

def load
  with_file do |f|
    YAML.load(f.read) || {}
  end
end

#reserve ⇒ Object 



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# File 'lib/envandle/gemspec_cache.rb', line 45

def reserve
  Reserved.new(@path)
end

#with_file ⇒ Object 



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# File 'lib/envandle/gemspec_cache.rb', line 12

def with_file
  path = File.join(@path, "list")
  @@mutex.synchronize do
    File.open(path, File::RDWR | File::CREAT) do |f|
      f.flock File::LOCK_EX
      yield f
    end
  end
end