mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
508afe2c26
Fixes #2290. 1. `Gem::Specification.date` returns SOURCE_DATE_EPOCH when defined, 2. this commit makes RubyGems set it _persistently_ when not provided. This combination means that you can build a gem, check the build time, and use that value to generate a new build -- and then verify they're the same. https://github.com/rubygems/rubygems/commit/d830d53f59
338 lines
7.5 KiB
Ruby
338 lines
7.5 KiB
Ruby
# -*- coding: utf-8 -*-
|
|
# frozen_string_literal: true
|
|
#--
|
|
# Copyright (C) 2004 Mauricio Julio Fernández Pradier
|
|
# See LICENSE.txt for additional licensing information.
|
|
#++
|
|
|
|
require 'digest'
|
|
|
|
##
|
|
# Allows writing of tar files
|
|
|
|
class Gem::Package::TarWriter
|
|
|
|
class FileOverflow < StandardError; end
|
|
|
|
##
|
|
# IO wrapper that allows writing a limited amount of data
|
|
|
|
class BoundedStream
|
|
|
|
##
|
|
# Maximum number of bytes that can be written
|
|
|
|
attr_reader :limit
|
|
|
|
##
|
|
# Number of bytes written
|
|
|
|
attr_reader :written
|
|
|
|
##
|
|
# Wraps +io+ and allows up to +limit+ bytes to be written
|
|
|
|
def initialize(io, limit)
|
|
@io = io
|
|
@limit = limit
|
|
@written = 0
|
|
end
|
|
|
|
##
|
|
# Writes +data+ onto the IO, raising a FileOverflow exception if the
|
|
# number of bytes will be more than #limit
|
|
|
|
def write(data)
|
|
if data.bytesize + @written > @limit
|
|
raise FileOverflow, "You tried to feed more data than fits in the file."
|
|
end
|
|
@io.write data
|
|
@written += data.bytesize
|
|
data.bytesize
|
|
end
|
|
|
|
end
|
|
|
|
##
|
|
# IO wrapper that provides only #write
|
|
|
|
class RestrictedStream
|
|
|
|
##
|
|
# Creates a new RestrictedStream wrapping +io+
|
|
|
|
def initialize(io)
|
|
@io = io
|
|
end
|
|
|
|
##
|
|
# Writes +data+ onto the IO
|
|
|
|
def write(data)
|
|
@io.write data
|
|
end
|
|
|
|
end
|
|
|
|
##
|
|
# Creates a new TarWriter, yielding it if a block is given
|
|
|
|
def self.new(io)
|
|
writer = super
|
|
|
|
return writer unless block_given?
|
|
|
|
begin
|
|
yield writer
|
|
ensure
|
|
writer.close
|
|
end
|
|
|
|
nil
|
|
end
|
|
|
|
##
|
|
# Creates a new TarWriter that will write to +io+
|
|
|
|
def initialize(io)
|
|
@io = io
|
|
@closed = false
|
|
end
|
|
|
|
##
|
|
# Adds file +name+ with permissions +mode+, and yields an IO for writing the
|
|
# file to
|
|
|
|
def add_file(name, mode) # :yields: io
|
|
check_closed
|
|
|
|
name, prefix = split_name name
|
|
|
|
init_pos = @io.pos
|
|
@io.write Gem::Package::TarHeader::EMPTY_HEADER # 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,
|
|
:mtime => Gem.source_date_epoch
|
|
|
|
@io.write header
|
|
@io.pos = final_pos
|
|
|
|
self
|
|
end
|
|
|
|
##
|
|
# Adds +name+ with permissions +mode+ to the tar, yielding +io+ for writing
|
|
# the file. The +digest_algorithm+ is written to a read-only +name+.sum
|
|
# file following the given file contents containing the digest name and
|
|
# hexdigest separated by a tab.
|
|
#
|
|
# The created digest object is returned.
|
|
|
|
def add_file_digest(name, mode, digest_algorithms) # :yields: io
|
|
digests = digest_algorithms.map do |digest_algorithm|
|
|
digest = digest_algorithm.new
|
|
digest_name =
|
|
if digest.respond_to? :name
|
|
digest.name
|
|
else
|
|
/::([^:]+)$/ =~ digest_algorithm.name
|
|
$1
|
|
end
|
|
|
|
[digest_name, digest]
|
|
end
|
|
|
|
digests = Hash[*digests.flatten]
|
|
|
|
add_file name, mode do |io|
|
|
Gem::Package::DigestIO.wrap io, digests do |digest_io|
|
|
yield digest_io
|
|
end
|
|
end
|
|
|
|
digests
|
|
end
|
|
|
|
##
|
|
# Adds +name+ with permissions +mode+ to the tar, yielding +io+ for writing
|
|
# the file. The +signer+ is used to add a digest file using its
|
|
# digest_algorithm per add_file_digest and a cryptographic signature in
|
|
# +name+.sig. If the signer has no key only the checksum file is added.
|
|
#
|
|
# Returns the digest.
|
|
|
|
def add_file_signed(name, mode, signer)
|
|
digest_algorithms = [
|
|
signer.digest_algorithm,
|
|
Digest::SHA512,
|
|
].compact.uniq
|
|
|
|
digests = add_file_digest name, mode, digest_algorithms do |io|
|
|
yield io
|
|
end
|
|
|
|
signature_digest = digests.values.compact.find do |digest|
|
|
digest_name =
|
|
if digest.respond_to? :name
|
|
digest.name
|
|
else
|
|
digest.class.name[/::([^:]+)\z/, 1]
|
|
end
|
|
|
|
digest_name == signer.digest_name
|
|
end
|
|
|
|
raise "no #{signer.digest_name} in #{digests.values.compact}" unless signature_digest
|
|
|
|
if signer.key
|
|
signature = signer.sign signature_digest.digest
|
|
|
|
add_file_simple "#{name}.sig", 0444, signature.length do |io|
|
|
io.write signature
|
|
end
|
|
end
|
|
|
|
digests
|
|
end
|
|
|
|
##
|
|
# Add file +name+ with permissions +mode+ +size+ bytes long. Yields an IO
|
|
# to write the file to.
|
|
|
|
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,
|
|
:mtime => Gem.source_date_epoch).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
|
|
|
|
##
|
|
# Adds symlink +name+ with permissions +mode+, linking to +target+.
|
|
|
|
def add_symlink(name, target, mode)
|
|
check_closed
|
|
|
|
name, prefix = split_name name
|
|
|
|
header = Gem::Package::TarHeader.new(:name => name, :mode => mode,
|
|
:size => 0, :typeflag => "2",
|
|
:linkname => target,
|
|
:prefix => prefix,
|
|
:mtime => Gem.source_date_epoch).to_s
|
|
|
|
@io.write header
|
|
|
|
self
|
|
end
|
|
|
|
##
|
|
# Raises IOError if the TarWriter is closed
|
|
|
|
def check_closed
|
|
raise IOError, "closed #{self.class}" if closed?
|
|
end
|
|
|
|
##
|
|
# Closes the TarWriter
|
|
|
|
def close
|
|
check_closed
|
|
|
|
@io.write "\0" * 1024
|
|
flush
|
|
|
|
@closed = true
|
|
end
|
|
|
|
##
|
|
# Is the TarWriter closed?
|
|
|
|
def closed?
|
|
@closed
|
|
end
|
|
|
|
##
|
|
# Flushes the TarWriter's IO
|
|
|
|
def flush
|
|
check_closed
|
|
|
|
@io.flush if @io.respond_to? :flush
|
|
end
|
|
|
|
##
|
|
# Creates a new directory in the tar file +name+ with +mode+
|
|
|
|
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,
|
|
:mtime => Gem.source_date_epoch
|
|
|
|
@io.write header
|
|
|
|
self
|
|
end
|
|
|
|
##
|
|
# Splits +name+ into a name and prefix that can fit in the TarHeader
|
|
|
|
def split_name(name) # :nodoc:
|
|
if name.bytesize > 256
|
|
raise Gem::Package::TooLongFileName.new("File \"#{name}\" has a too long path (should be 256 or less)")
|
|
end
|
|
|
|
prefix = ''
|
|
if name.bytesize > 100
|
|
parts = name.split('/', -1) # parts are never empty here
|
|
name = parts.pop # initially empty for names with a trailing slash ("foo/.../bar/")
|
|
prefix = parts.join('/') # if empty, then it's impossible to split (parts is empty too)
|
|
while !parts.empty? && (prefix.bytesize > 155 || name.empty?)
|
|
name = parts.pop + '/' + name
|
|
prefix = parts.join('/')
|
|
end
|
|
|
|
if name.bytesize > 100 or prefix.empty?
|
|
raise Gem::Package::TooLongFileName.new("File \"#{prefix}/#{name}\" has a too long name (should be 100 or less)")
|
|
end
|
|
|
|
if prefix.bytesize > 155
|
|
raise Gem::Package::TooLongFileName.new("File \"#{prefix}/#{name}\" has a too long base path (should be 155 or less)")
|
|
end
|
|
end
|
|
|
|
return name, prefix
|
|
end
|
|
|
|
end
|