Class: MiniTarball::Header

Inherits:
Object
  • Object
show all
Defined in:
lib/mini_tarball/header.rb

Constant Summary collapse

BLOCK_SIZE =

Size of each block in the tar file in bytes

512
TYPE_REGULAR =

bytes

"0"
"L"
FIELDS =

stree-ignore

{
  name:     { length: 100, type: :chars },
  mode:     { length:   8, type: :mode },
  uid:      { length:   8, type: :number },
  gid:      { length:   8, type: :number },
  size:     { length:  12, type: :number },
  mtime:    { length:  12, type: :number },
  checksum: { length:   8, type: :checksum },
  typeflag: { length:   1, type: :chars },
  linkname: { length: 100, type: :chars },
  magic:    { length:   6, type: :chars },
  version:  { length:   2, type: :chars },
  uname:    { length:  32, type: :chars },
  gname:    { length:  32, type: :chars },
  devmajor: { length:   8, type: :number },
  devminor: { length:   8, type: :number },
  prefix:   { length: 155, type: :chars }
}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name:, mode: 0, uid: nil, gid: nil, size: 0, mtime: 0, typeflag: TYPE_REGULAR, linkname: "", uname: nil, gname: nil) ⇒ Header

:reek:LongParameterList



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# File 'lib/mini_tarball/header.rb', line 45

def initialize(
  name:,
  mode: 0,
  uid: nil,
  gid: nil,
  size: 0,
  mtime: 0,
  typeflag: TYPE_REGULAR,
  linkname: "",
  uname: nil,
  gname: nil
)
  @values = {
    name: name,
    mode: mode,
    uid: uid,
    gid: gid,
    size: size,
    mtime: mtime.to_i,
    checksum: nil,
    typeflag: typeflag,
    linkname: linkname,
    magic: "ustar ",
    version: " ",
    uname: uname,
    gname: gname,
    devmajor: nil,
    devminor: nil,
    prefix: "",
  }
end

Class Method Details



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# File 'lib/mini_tarball/header.rb', line 31

def self.long_link_header(name)
  Header.new(
    name: "././@LongLink",
    mode: 0644,
    uid: 0,
    gid: 0,
    size: name.bytesize + 1,
    typeflag: TYPE_LONG_LINK,
    uname: "root",
    gname: "root",
  )
end

Instance Method Details

#has_long_name? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mini_tarball/header.rb', line 86

def has_long_name?
  value_of(:name).bytesize > FIELDS[:name][:length]
end

#to_binary ⇒ Object 



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# File 'lib/mini_tarball/header.rb', line 81

def to_binary
  fields = HeaderFields.new(self)
  fields.to_binary
end

#value_of(key) ⇒ Object 



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# File 'lib/mini_tarball/header.rb', line 77

def value_of(key)
  @values[key]
end