Class: MagicReveal::Conductor

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

Overview

Fetchs a github zip file and unpacks it for use.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url = nil) ⇒ Conductor

Returns a new instance of Conductor.



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# File 'lib/magic_reveal/conductor.rb', line 12

def initialize url=nil
  self.url = url unless url.nil?
end

Instance Attribute Details

#enable_warnings ⇒ Object (readonly)

Returns the value of attribute enable_warnings.



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# File 'lib/magic_reveal/conductor.rb', line 10

def enable_warnings
  @enable_warnings
end

#url ⇒ Object

Returns the value of attribute url.



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# File 'lib/magic_reveal/conductor.rb', line 10

def url
  @url
end

Instance Method Details

#fetch(save_path, limit = 5) ⇒ Object

Raises:



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# File 'lib/magic_reveal/conductor.rb', line 20

def fetch save_path, limit = 5
  raise TooManyRedirects if limit <= 0
  save_path = Pathname.new save_path

  request = Net::HTTP::Get.new url.path
  response = Net::HTTP.start(url.host, url.port, use_ssl: url.scheme == 'https') { |http| http.request(request)  }

  case response
  when Net::HTTPSuccess then
    save_path.open('w') { |fp| fp.write response.body }
  when Net::HTTPRedirection then
    self.url = response['location']
    warn "redirected to #{url}" if enable_warnings
    fetch(save_path, limit - 1)
  else
    raise Error, "Huh? #{response.value}"
  end
end

#unpack(zip_file, directory) ⇒ Object

Raises:



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# File 'lib/magic_reveal/conductor.rb', line 39

def unpack zip_file, directory
  directory = Pathname.new directory
  raise Error, "Directory '#{directory}' already exists." if directory.exist?

  Archive::Zip.extract zip_file.to_s, directory.to_s

  # Unwrap the outer-most unzipped directory.
  wrapper_dir = directory.children.first
  wrapper_dir.children.each { |c| c.rename(directory + c.basename)  }
  wrapper_dir.rmdir
end