Class: Gem::Package::TarWriter
- Inherits:
-
Object
- Object
- Gem::Package::TarWriter
- Defined in:
- lib/rubygems/package/tar_writer.rb
Overview
Allows writing of tar files
Defined Under Namespace
Classes: BoundedStream, FileOverflow, RestrictedStream
Class Method Summary collapse
-
.new(io) ⇒ Object
Creates a new TarWriter, yielding it if a block is given.
Instance Method Summary collapse
-
#add_file(name, mode) {|RestrictedStream.new(@io)| ... } ⇒ Object
Adds file
name
with permissionsmode
, and yields an IO for writing the file to. -
#add_file_simple(name, mode, size) {|os| ... } ⇒ Object
Add file
name
with permissionsmode
size
bytes long. -
#check_closed ⇒ Object
Raises IOError if the TarWriter is closed.
-
#close ⇒ Object
Closes the TarWriter.
-
#closed? ⇒ Boolean
Is the TarWriter closed?.
-
#flush ⇒ Object
Flushes the TarWriter’s IO.
-
#initialize(io) ⇒ TarWriter
constructor
Creates a new TarWriter that will write to
io
. -
#mkdir(name, mode) ⇒ Object
Creates a new directory in the tar file
name
withmode
. -
#split_name(name) ⇒ Object
Splits
name
into a name and prefix that can fit in the TarHeader.
Constructor Details
#initialize(io) ⇒ TarWriter
Creates a new TarWriter that will write to io
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# File 'lib/rubygems/package/tar_writer.rb', line 94 def initialize(io) @io = io @closed = false end |
Class Method Details
.new(io) ⇒ Object
Creates a new TarWriter, yielding it if a block is given
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# File 'lib/rubygems/package/tar_writer.rb', line 77 def self.new(io) writer = super return writer unless block_given? begin yield writer ensure writer.close end nil end |
Instance Method Details
#add_file(name, mode) {|RestrictedStream.new(@io)| ... } ⇒ Object
Adds file name
with permissions mode
, and yields an IO for writing the file to
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# File 'lib/rubygems/package/tar_writer.rb', line 103 def add_file(name, mode) # :yields: io check_closed raise Gem::Package::NonSeekableIO unless @io.respond_to? :pos= name, prefix = split_name name init_pos = @io.pos @io.write "\0" * 512 # placeholder for the header yield RestrictedStream.new(@io) if block_given? size = @io.pos - init_pos - 512 remainder = (512 - (size % 512)) % 512 @io.write "\0" * remainder final_pos = @io.pos @io.pos = init_pos header = Gem::Package::TarHeader.new :name => name, :mode => mode, :size => size, :prefix => prefix @io.write header @io.pos = final_pos self end |
#add_file_simple(name, mode, size) {|os| ... } ⇒ Object
Add file name
with permissions mode
size
bytes long. Yields an IO to write the file to.
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# File 'lib/rubygems/package/tar_writer.rb', line 136 def add_file_simple(name, mode, size) # :yields: io check_closed name, prefix = split_name name header = Gem::Package::TarHeader.new(:name => name, :mode => mode, :size => size, :prefix => prefix).to_s @io.write header os = BoundedStream.new @io, size yield os if block_given? min_padding = size - os.written @io.write("\0" * min_padding) remainder = (512 - (size % 512)) % 512 @io.write("\0" * remainder) self end |
#check_closed ⇒ Object
Raises IOError if the TarWriter is closed
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# File 'lib/rubygems/package/tar_writer.rb', line 161 def check_closed raise IOError, "closed #{self.class}" if closed? end |
#close ⇒ Object
Closes the TarWriter
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# File 'lib/rubygems/package/tar_writer.rb', line 168 def close check_closed @io.write "\0" * 1024 flush @closed = true end |
#closed? ⇒ Boolean
Is the TarWriter closed?
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# File 'lib/rubygems/package/tar_writer.rb', line 180 def closed? @closed end |
#flush ⇒ Object
Flushes the TarWriter’s IO
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# File 'lib/rubygems/package/tar_writer.rb', line 187 def flush check_closed @io.flush if @io.respond_to? :flush end |
#mkdir(name, mode) ⇒ Object
Creates a new directory in the tar file name
with mode
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# File 'lib/rubygems/package/tar_writer.rb', line 196 def mkdir(name, mode) check_closed name, prefix = split_name(name) header = Gem::Package::TarHeader.new :name => name, :mode => mode, :typeflag => "5", :size => 0, :prefix => prefix @io.write header self end |
#split_name(name) ⇒ Object
Splits name
into a name and prefix that can fit in the TarHeader
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# File 'lib/rubygems/package/tar_writer.rb', line 213 def split_name(name) # :nodoc: raise Gem::Package::TooLongFileName if name.size > 256 if name.size <= 100 then prefix = "" else parts = name.split(/\//) newname = parts.pop nxt = "" loop do nxt = parts.pop break if newname.size + 1 + nxt.size > 100 newname = nxt + "/" + newname end prefix = (parts + [nxt]).join "/" name = newname if name.size > 100 or prefix.size > 155 then raise Gem::Package::TooLongFileName end end return name, prefix end |