Class: Zippy

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/zippy.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(entries_and_options = {}) {|_self| ... } ⇒ Zippy

Make an archive Takes a hash of options and entries. Options use symbols and entries use strings. The :filename option is optional; if none is provided, a generated, temporary filename will be used.

Example: Zippy.new(:filename => ‘my.zip’, ‘README’ => ‘Thank you for reading me.’)

Yields:

  • (_self)

Yield Parameters:

  • _self (Zippy) —

    the object that the method was called on



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# File 'lib/zippy.rb', line 16

def initialize(entries_and_options={})
  entries_and_options.each{|k,v| send("#{k}=", v) if respond_to?("#{k}=") && k.is_a?(Symbol) }
  without_autocommit do
    entries_and_options.each{|k,v| self[k] = v if k.is_a?(String) }
  end
  zipfile.commit if autocommit?
  yield self if block_given?
end

Class Method Details

.[](filename, entry = nil) ⇒ Object 



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# File 'lib/zippy.rb', line 177

def self.[](filename, entry=nil)
  entry ? read(filename, entry) : list(filename)
end

.[]=(filename, entry, content) ⇒ Object 



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# File 'lib/zippy.rb', line 181

def self.[]=(filename, entry, content)
  open(filename){|z| z[entry] = content }
end

.create(filename, options_and_entries = {}, &b) ⇒ Object

Create a new archive with the name filename, populate it and then close it

Warning: Will overwrite existing file



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# File 'lib/zippy.rb', line 131

def self.create(filename, options_and_entries={}, &b)
  File.unlink(filename) if File.exists?(filename)
  z = new({:filename => filename}.merge(options_and_entries), &b)
  z.close
  z
end

.each(filename) ⇒ Object

Iterate each entry name and its contents in the archive filename



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# File 'lib/zippy.rb', line 151

def self.each(filename)
  open(filename) do |zip|
    zip.each do |name|
      yield name, zip[name]
    end
  end
end

.list(filename) ⇒ Object

Returns an array of entry names from the archive filename

Zippy.list(‘my.zip’) #=> [‘foo’, ‘bar’]



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# File 'lib/zippy.rb', line 162

def self.list(filename)
  list = nil
  open(filename){|z| list = z.paths }
  list
end

.open(filename, options_and_entries = {}) ⇒ Object

Works the same as new, but require’s an explicit filename If a block is provided, it will be closed at the end of the block

Raises:

  • (ArgumentError) 


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# File 'lib/zippy.rb', line 140

def self.open(filename, options_and_entries={})
  raise(ArgumentError, "file \"#{filename}\" does not exist") unless File.exists?(filename)
  z = new({:filename => filename}.merge(options_and_entries))
  if block_given?
    yield z
    z.close
  end
  z
end

.read(filename, entry) ⇒ Object

Read the contents of a single entry in filename



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# File 'lib/zippy.rb', line 170

def self.read(filename, entry)
  content = nil
  open(filename){|z| content = z[entry] }
  content
end

Instance Method Details

#[](entry) ⇒ Object

Read an entry



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# File 'lib/zippy.rb', line 45

def [](entry)
  return nil unless include?(entry)
  zipfile.read(entry)
end

#[]=(entry, contents) ⇒ Object

Add or change an entry with the name entry contents can be a string or an IO



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# File 'lib/zippy.rb', line 52

def []=(entry, contents)
  zipfile.get_output_stream entry do |s|
    if contents.is_a?(String)
      s.write contents
    elsif contents.respond_to?(:read)
      s.write contents.read(1024) until contents.eof?
    elsif contents.respond_to?(:to_s)
      s.write contents.to_s
    else#Not sure these last two are different
      s.write "#{contents}"
    end
  end
  zipfile.commit if autocommit?
  true
end

#close ⇒ Object

Close the archive for writing



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# File 'lib/zippy.rb', line 87

def close
  write(filename)
  zipfile.close
end

#data ⇒ Object

Returns the entire archive as a string



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# File 'lib/zippy.rb', line 105

def data
  return nil if empty?
  zipfile.commit
  File.read(filename, :encoding => Encoding::BINARY)
end

#delete(*entries) ⇒ Object

Delete an entry



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# File 'lib/zippy.rb', line 70

def delete(*entries)
  entries.each do |entry|
    zipfile.remove(entry)
  end
  zipfile.commit if autocommit?
  entries
end

#each ⇒ Object 



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# File 'lib/zippy.rb', line 26

def each
  zipfile.each{|e| yield e.name }
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zippy.rb', line 34

def empty?
  size.zero?
end

#filename ⇒ Object 



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# File 'lib/zippy.rb', line 112

def filename
  @filename ||= random_filename
end

#filename=(filename) ⇒ Object 



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# File 'lib/zippy.rb', line 116

def filename=(filename)
  rename_file(filename)
  @filename = filename
end

#paths ⇒ Object

Returns the full path to all entries in the archive



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# File 'lib/zippy.rb', line 39

def paths
  map{|p| p }
end

#rename(old_name, new_name) ⇒ Object

Rename an entry



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# File 'lib/zippy.rb', line 79

def rename(old_name, new_name)
  zipfile.rename(old_name, new_name)
  zipfile.commit if autocommit?
  old_name
end

#size ⇒ Object 



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# File 'lib/zippy.rb', line 30

def size
  zipfile.size
end

#write(filename) ⇒ Object

Write the archive to filename If a filename is not provided, it will write to the default filename (self.filename)



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# File 'lib/zippy.rb', line 95

def write(filename)
  return false if empty?
  zipfile.commit
  unless filename == self.filename
    FileUtils.cp(self.filename, filename)
  end
  true
end

#zipfile ⇒ Object 



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# File 'lib/zippy.rb', line 122

def zipfile
  @zipfile ||= Zip::File.new(filename, true)
end